File Synchronization
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Azure Files can be deployed in two main ways: by directly mounting the serverless Azure file shares or by caching Azure file shares on-premises using Azure File Sync. Which deployment option you choose changes the things you need to consider as you plan for your deployment.
How It Works 1. Install GoodSync. Download and install on Windows, MAC, LINUX, or NAS platforms. Create your first GoodSync job. Create and name your first GoodSync job. Select source and destination folders. Locate the files you like to backup or synchronize. Choose your automation. Synchronize Files and Folders FreeFileSync is a folder comparison and synchronization software that creates and manages backup copies of all your important files. Instead of copying every file every time, FreeFileSync determines the differences between a source and a target folder and transfers only the minimum amount of data needed. Jan 16, 2020 Synchronize: This option will synchronize any new, updated, renamed or deleted files. This means if you delete or rename any file on either side, the changes will be.
Direct mount of an Azure file share: Since Azure Files provides SMB access, you can mount Azure file shares on-premises or in the cloud using the standard SMB client available in Windows, macOS, and Linux. Because Azure file shares are serverless, deploying for production scenarios does not require managing a file server or NAS device. This means you don't have to apply software patches or swap out physical disks.
Cache Azure file share on-premises with Azure File Sync: Azure File Sync enables you to centralize your organization's file shares in Azure Files, while keeping the flexibility, performance, and compatibility of an on-premises file server. Azure File Sync transforms an on-premises (or cloud) Windows Server into a quick cache of your Azure file share.
This article primarily addresses deployment considerations for deploying Azure File Sync. To plan for a deployment of Azure file shares to be directly mounted by an on-premises or cloud client, see Planning for an Azure Files deployment.
Management concepts
An Azure File Sync deployment has three fundamental management objects:
- Azure file share: An Azure file share is a serverless cloud file share, which provides the cloud endpoint of an Azure File Sync sync relationship. Files in an Azure file share can be accessed directly with SMB or the FileREST protocol, although we encourage you to primarily access the files through the Windows Server cache when the Azure file share is being used with Azure File Sync. This is because Azure Files today lacks an efficient change detection mechanism like Windows Server has, so changes to the Azure file share directly will take time to propagate back to the server endpoints.
- Server endpoint: The path on the Windows Server that is being synced to an Azure file share. This can be a specific folder on a volume or the root of the volume. Multiple server endpoints can exist on the same volume if their namespaces do not overlap.
- Sync group: The object that defines the sync relationship between a cloud endpoint, or Azure file share, and a server endpoint. Endpoints within a sync group are kept in sync with each other. If for example, you have two distinct sets of files that you want to manage with Azure File Sync, you would create two sync groups and add different endpoints to each sync group.
Azure file share management concepts
Azure file shares are deployed into storage accounts, which are top-level objects that represent a shared pool of storage. This pool of storage can be used to deploy multiple file shares, as well as other storage resources such as blob containers, queues, or tables. All storage resources that are deployed into a storage account share the limits that apply to that storage account. To see the current limits for a storage account, see Azure Files scalability and performance targets.
There are two main types of storage accounts you will use for Azure Files deployments:
- General purpose version 2 (GPv2) storage accounts: GPv2 storage accounts allow you to deploy Azure file shares on standard/hard disk-based (HDD-based) hardware. In addition to storing Azure file shares, GPv2 storage accounts can store other storage resources such as blob containers, queues, or tables.
- FileStorage storage accounts: FileStorage storage accounts allow you to deploy Azure file shares on premium/solid-state disk-based (SSD-based) hardware. FileStorage accounts can only be used to store Azure file shares; no other storage resources (blob containers, queues, tables, etc.) can be deployed in a FileStorage account.
There are several other storage account types you may come across in the Azure portal, PowerShell, or CLI. Two storage account types, BlockBlobStorage and BlobStorage storage accounts, cannot contain Azure file shares. The other two storage account types you may see are general purpose version 1 (GPv1) and classic storage accounts, both of which can contain Azure file shares. Although GPv1 and classic storage accounts may contain Azure file shares, most new features of Azure Files are available only in GPv2 and FileStorage storage accounts. We therefore recommend to only use GPv2 and FileStorage storage accounts for new deployments, and to upgrade GPv1 and classic storage accounts if they already exist in your environment.
Azure File Sync management concepts
Sync groups are deployed into Storage Sync Services, which are top-level objects that register servers for use with Azure File Sync and contain the sync group relationships. The Storage Sync Service resource is a peer of the storage account resource, and can similarly be deployed to Azure resource groups. A Storage Sync Service can create sync groups that contain Azure file shares across multiple storage accounts and multiple registered Windows Servers.
Before you can create a sync group in a Storage Sync Service, you must first register a Windows Server with the Storage Sync Service. This creates a registered server object, which represents a trust relationship between your server or cluster and the Storage Sync Service. To register a Storage Sync Service, you must first install the Azure File Sync agent on the server. An individual server or cluster can be registered with only one Storage Sync Service at a time.
A sync group contains one cloud endpoint, or Azure file share, and at least one server endpoint. The server endpoint object contains the settings that configure the cloud tiering capability, which provides the caching capability of Azure File Sync. In order to sync with an Azure file share, the storage account containing the Azure file share must be in the same Azure region as the Storage Sync Service.
Management guidance
When deploying Azure File Sync, we recommend:
Deploying Azure file shares 1:1 with Windows file shares. The server endpoint object gives you a great degree of flexibility on how you set up the sync topology on the server-side of the sync relationship. To simplify management, make the path of the server endpoint match the path of the Windows file share.
Use as few Storage Sync Services as possible. This will simplify management when you have sync groups that contain multiple server endpoints, since a Windows Server can only be registered to one Storage Sync Service at a time.
Paying attention to a storage account's IOPS limitations when deploying Azure file shares. Ideally, you would map file shares 1:1 with storage accounts, however this may not always be possible due to various limits and restrictions, both from your organization and from Azure. When it is not possible to have only one file share deployed in one storage account, consider which shares will be highly active and which shares will be less active to ensure that the hottest file shares don't get put in the same storage account together.
Windows file server considerations
To enable the sync capability on Windows Server, you must install the Azure File Sync downloadable agent. The Azure File Sync agent provides two main components: FileSyncSvc.exe, the background Windows service that is responsible for monitoring changes on the server endpoints and initiating sync sessions, and StorageSync.sys, a file system filter which enables cloud tiering and fast disaster recovery.
Operating system requirements
Azure File Sync is supported with the following versions of Windows Server:
| Version | Supported SKUs | Supported deployment options |
|---|---|---|
| Windows Server 2019 | Datacenter, Standard, and IoT | Full and Core |
| Windows Server 2016 | Datacenter, Standard, and Storage Server | Full and Core |
| Windows Server 2012 R2 | Datacenter, Standard, and Storage Server | Full and Core |
Future versions of Windows Server will be added as they are released.
Important
We recommend keeping all servers that you use with Azure File Sync up to date with the latest updates from Windows Update.
Minimum system resources
Azure File Sync requires a server, either physical or virtual, with at least one CPU and a minimum of 2 GiB of memory.
Important
If the server is running in a virtual machine with dynamic memory enabled, the VM should be configured with a minimum of 2048 MiB of memory.
For most production workloads, we do not recommend configuring an Azure File Sync sync server with only the minimum requirements. See Recommended system resources for more information.
Recommended system resources
Just like any server feature or application, the system resource requirements for Azure File Sync are determined by the scale of the deployment; larger deployments on a server require greater system resources. For Azure File Sync, scale is determined by the number of objects across the server endpoints and the churn on the dataset. A single server can have server endpoints in multiple sync groups and the number of objects listed in the following table accounts for the full namespace that a server is attached to.
For example, server endpoint A with 10 million objects + server endpoint B with 10 million objects = 20 million objects. For that example deployment, we would recommend 8 CPUs, 16 GiB of memory for steady state, and (if possible) 48 GiB of memory for the initial migration.
Namespace data is stored in memory for performance reasons. Because of that, bigger namespaces require more memory to maintain good performance, and more churn requires more CPU to process.
In the following table, we have provided both the size of the namespace as well as a conversion to capacity for typical general purpose file shares, where the average file size is 512 KiB. If your file sizes are smaller, consider adding additional memory for the same amount of capacity. Base your memory configuration on the size of the namespace.
| Namespace size - files & directories (millions) | Typical capacity (TiB) | CPU Cores | Recommended memory (GiB) |
|---|---|---|---|
| 3 | 1.4 | 2 | 8 (initial sync)/ 2 (typical churn) |
| 5 | 2.3 | 2 | 16 (initial sync)/ 4 (typical churn) |
| 10 | 4.7 | 4 | 32 (initial sync)/ 8 (typical churn) |
| 30 | 14.0 | 8 | 48 (initial sync)/ 16 (typical churn) |
| 50 | 23.3 | 16 | 64 (initial sync)/ 32 (typical churn) |
| 100* | 46.6 | 32 | 128 (initial sync)/ 32 (typical churn) |
*Syncing more than 100 million files & directories is not recommended at this time. This is a soft limit based on our tested thresholds. For more information, see Azure Files scalability and performance targets.
Tip
Initial synchronization of a namespace is an intensive operation and we recommend allocating more memory until initial synchronization is complete. This isn't required but, may speed up initial sync.
Typical churn is 0.5% of the namespace changing per day. For higher levels of churn, consider adding more CPU.
- A locally attached volume formatted with the NTFS file system.
Evaluation cmdlet
Before deploying Azure File Sync, you should evaluate whether it is compatible with your system using the Azure File Sync evaluation cmdlet. This cmdlet checks for potential issues with your file system and dataset, such as unsupported characters or an unsupported operating system version. Its checks cover most but not all of the features mentioned below; we recommend you read through the rest of this section carefully to ensure your deployment goes smoothly.
The evaluation cmdlet can be installed by installing the Az PowerShell module, which can be installed by following the instructions here: Install and configure Azure PowerShell.
Usage
You can invoke the evaluation tool in a few different ways: you can perform the system checks, the dataset checks, or both. To perform both the system and dataset checks:
To test only your dataset:
To test system requirements only:
To display the results in CSV:
File system compatibility
Azure File Sync is only supported on directly attached, NTFS volumes. Direct attached storage, or DAS, on Windows Server means that the Windows Server operating system owns the file system. DAS can be provided through physically attaching disks to the file server, attaching virtual disks to a file server VM (such as a VM hosted by Hyper-V), or even through ISCSI.
Only NTFS volumes are supported; ReFS, FAT, FAT32, and other file systems are not supported.
The following table shows the interop state of NTFS file system features:
| Feature | Support status | Notes |
|---|---|---|
| Access control lists (ACLs) | Fully supported | Windows-style discretionary access control lists are preserved by Azure File Sync, and are enforced by Windows Server on server endpoints. ACLs can also be enforced when directly mounting the Azure file share, however this requires additional configuration. See the Identity section for more information. |
| Hard links | Skipped | |
| Symbolic links | Skipped | |
| Mount points | Partially supported | Mount points might be the root of a server endpoint, but they are skipped if they are contained in a server endpoint's namespace. |
| Junctions | Skipped | For example, Distributed File System DfrsrPrivate and DFSRoots folders. |
| Reparse points | Skipped | |
| NTFS compression | Fully supported | |
| Sparse files | Fully supported | Sparse files sync (are not blocked), but they sync to the cloud as a full file. If the file contents change in the cloud (or on another server), the file is no longer sparse when the change is downloaded. |
| Alternate Data Streams (ADS) | Preserved, but not synced | For example, classification tags created by the File Classification Infrastructure are not synced. Existing classification tags on files on each of the server endpoints are left untouched. |
Azure File Sync will also skip certain temporary files and system folders:
| File/folder | Note |
|---|---|
| pagefile.sys | File specific to system |
| Desktop.ini | File specific to system |
| thumbs.db | Temporary file for thumbnails |
| ehthumbs.db | Temporary file for media thumbnails |
| ~$*.* | Office temporary file |
| *.tmp | Temporary file |
| *.laccdb | Access DB locking file |
| 635D02A9D91C401B97884B82B3BCDAEA.* | Internal Sync file |
| System Volume Information | Folder specific to volume |
| $RECYCLE.BIN | Folder |
| SyncShareState | Folder for Sync |
Failover Clustering
Windows Server Failover Clustering is supported by Azure File Sync for the 'File Server for general use' deployment option. Failover Clustering is not supported on 'Scale-Out File Server for application data' (SOFS) or on Clustered Shared Volumes (CSVs).
Note
The Azure File Sync agent must be installed on every node in a Failover Cluster for sync to work correctly.
Data Deduplication
Windows Server 2016 and Windows Server 2019
Data Deduplication is supported on volumes with cloud tiering enabled on Windows Server 2016 and Windows Server 2019. Enabling Data Deduplication on a volume with cloud tiering enabled lets you cache more files on-premises without provisioning more storage.
When Data Deduplication is enabled on a volume with cloud tiering enabled, Dedup optimized files within the server endpoint location will be tiered similar to a normal file based on the cloud tiering policy settings. Once the Dedup optimized files have been tiered, the Data Deduplication garbage collection job will run automatically to reclaim disk space by removing unnecessary chunks that are no longer referenced by other files on the volume.
Note the volume savings only apply to the server; your data in the Azure file share will not be deduped.
Note
To support Data Deduplication on volumes with cloud tiering enabled on Windows Server 2019, Windows update KB4520062 must be installed and Azure File Sync agent version 9.0.0.0 or newer is required.
Windows Server 2012 R2
Azure File Sync does not support Data Deduplication and cloud tiering on the same volume on Windows Server 2012 R2. If Data Deduplication is enabled on a volume, cloud tiering must be disabled.
Notes
If Data Deduplication is installed prior to installing the Azure File Sync agent, a restart is required to support Data Deduplication and cloud tiering on the same volume.
If Data Deduplication is enabled on a volume after cloud tiering is enabled, the initial Deduplication optimization job will optimize files on the volume that are not already tiered and will have the following impact on cloud tiering:
- Free space policy will continue to tier files as per the free space on the volume by using the heatmap.
- Date policy will skip tiering of files that may have been otherwise eligible for tiering due to the Deduplication optimization job accessing the files.
For ongoing Deduplication optimization jobs, cloud tiering with date policy will get delayed by the Data Deduplication MinimumFileAgeDays setting, if the file is not already tiered.
- Example: If the MinimumFileAgeDays setting is seven days and cloud tiering date policy is 30 days, the date policy will tier files after 37 days.
- Note: Once a file is tiered by Azure File Sync, the Deduplication optimization job will skip the file.
If a server running Windows Server 2012 R2 with the Azure File Sync agent installed is upgraded to Windows Server 2016 or Windows Server 2019, the following steps must be performed to support Data Deduplication and cloud tiering on the same volume:
- Uninstall the Azure File Sync agent for Windows Server 2012 R2 and restart the server.
- Download the Azure File Sync agent for the new server operating system version (Windows Server 2016 or Windows Server 2019).
- Install the Azure File Sync agent and restart the server.
Note: The Azure File Sync configuration settings on the server are retained when the agent is uninstalled and reinstalled.
Distributed File System (DFS)
Azure File Sync supports interop with DFS Namespaces (DFS-N) and DFS Replication (DFS-R).
DFS Namespaces (DFS-N): Azure File Sync is fully supported on DFS-N servers. You can install the Azure File Sync agent on one or more DFS-N members to sync data between the server endpoints and the cloud endpoint. For more information, see DFS Namespaces overview.
DFS Replication (DFS-R): Since DFS-R and Azure File Sync are both replication solutions, in most cases, we recommend replacing DFS-R with Azure File Sync. There are however several scenarios where you would want to use DFS-R and Azure File Sync together:
- You are migrating from a DFS-R deployment to an Azure File Sync deployment. For more information, see Migrate a DFS Replication (DFS-R) deployment to Azure File Sync.
- Not every on-premises server that needs a copy of your file data can be connected directly to the internet.
- Branch servers consolidate data onto a single hub server, for which you would like to use Azure File Sync.
For Azure File Sync and DFS-R to work side by side:
- Azure File Sync cloud tiering must be disabled on volumes with DFS-R replicated folders.
- Server endpoints should not be configured on DFS-R read-only replication folders.
For more information, see DFS Replication overview.
File Synchronization Cloud
Sysprep
Using sysprep on a server that has the Azure File Sync agent installed is not supported and can lead to unexpected results. Agent installation and server registration should occur after deploying the server image and completing sysprep mini-setup.
Windows Search
If cloud tiering is enabled on a server endpoint, files that are tiered are skipped and not indexed by Windows Search. Non-tiered files are indexed properly.
Other Hierarchical Storage Management (HSM) solutions
No other HSM solutions should be used with Azure File Sync.
Identity
Azure File Sync works with your standard AD-based identity without any special setup beyond setting up sync. When you are using Azure File Sync, the general expectation is that most accesses go through the Azure File Sync caching servers, rather than through the Azure file share. Since the server endpoints are located on Windows Server, and Windows Server has supported AD and Windows-style ACLs for a very long time, nothing is needed beyond ensuring the Windows file servers registered with the Storage Sync Service are domain joined. Azure File Sync will store ACLs on the files in the Azure file share, and will replicate them to all server endpoints.
Even though changes made directly to the Azure file share will take longer to sync to the server endpoints in the sync group, you may also want to ensure that you can enforce your AD permissions on your file share directly in the cloud as well. To do this, you must domain join your storage account to your on-premises AD, just like how your Windows file servers are domain joined. To learn more about domain joining your storage account to a customer-owned Active Directory, see Azure Files Active Directory overview.
Important
Domain joining your storage account to Active Directory is not required to successfully deploy Azure File Sync. This is a strictly optional step that allows the Azure file share to enforce on-premises ACLs when users mount the Azure file share directly.
Networking
The Azure File Sync agent communicates with your Storage Sync Service and Azure file share using the Azure File Sync REST protocol and the FileREST protocol, both of which always use HTTPS over port 443. SMB is never used to upload or download data between your Windows Server and the Azure file share. Because most organizations allow HTTPS traffic over port 443, as a requirement for visiting most websites, special networking configuration is usually not required to deploy Azure File Sync.
Based on your organization's policy or unique regulatory requirements, you may require more restrictive communication with Azure, and therefore Azure File Sync provides several mechanisms for you configure networking. Based on your requirements, you can:
- Tunnel sync and file upload/download traffic over your ExpressRoute or Azure VPN.
- Make use of Azure Files and Azure Networking features such as service endpoints and private endpoints.
- Configure Azure File Sync to support your proxy in your environment.
- Throttle network activity from Azure File Sync.
To learn more about configuring the networking functionality of Azure File Sync, see:
Encryption
When using Azure File Sync, there are three different layers of encryption to consider: encryption on the at-rest storage of Windows Server, encryption in transit between the Azure File Sync agent and Azure, and encryption at rest of your data in the Azure file share.
Windows Server encryption at rest
There are two strategies for encrypting data on Windows Server that work generally with Azure File Sync: encryption beneath the file system such that the file system and all of the data written to it is encrypted, and encryption within the file format itself. These methods are not mutually exclusive; they can be used together if desired since the purpose of encryption is different.
To provide encryption beneath the file system, Windows Server provides BitLocker inbox. BitLocker is fully transparent to Azure File Sync. The primary reason to use an encryption mechanism like BitLocker is to prevent physical exfiltration of data from your on-premises datacenter by someone stealing the disks and to prevent sideloading an unauthorized OS to perform unauthorized reads/writes to your data. To learn more about BitLocker, see BitLocker overview.
Third party products which work similarly to BitLocker, in that they sit beneath the NTFS volume, should similarly work fully transparently with Azure File Sync.
The other main method for encrypting data is to encrypt the file's data stream when the application saves the file. Some applications may do this natively, however this is usually not the case. An example of a method for encrypting the file's data stream is Azure Information Protection (AIP)/Azure Rights Management Services (Azure RMS)/Active Directory RMS. The primary reason to use an encryption mechanism like AIP/RMS is to prevent data exfiltration of data from your file share by people copying it to alternate locations, like to a flash drive, or emailing it to an unauthorized person. When a file's data stream is encrypted as part of the file format, this file will continue to be encrypted on the Azure file share.
Azure File Sync does not interoperate with NTFS Encrypted File System (NTFS EFS) or third party encryption solutions that sit above the file system but below the file's data stream.
Encryption in transit
Azure File Sync agent communicates with your Storage Sync Service and Azure file share using the Azure File Sync REST protocol and the FileREST protocol, both of which always use HTTPS over port 443. Azure File Sync does not send unencrypted requests over HTTP.
Azure storage accounts contain a switch for requiring encryption in transit, which is enabled by default. Even if the switch at the storage account level is disabled, meaning that unencrypted connections to your Azure file shares are possible, Azure File Sync will still only used encrypted channels to access your file share.
The primary reason to disable encryption in transit for the storage account is to support a legacy application that must be run on an older operating system, such as Windows Server 2008 R2 or older Linux distribution, talking to an Azure file share directly. If the legacy application talks to the Windows Server cache of the file share, toggling this setting will have no effect.
We strongly recommend ensuring encryption of data in-transit is enabled.
For more information about encryption in transit, see requiring secure transfer in Azure storage.
Azure file share encryption at rest
All data stored in Azure Files is encrypted at rest using Azure storage service encryption (SSE). Storage service encryption works similarly to BitLocker on Windows: data is encrypted beneath the file system level. Because data is encrypted beneath the Azure file share's file system, as it's encoded to disk, you don't have to have access to the underlying key on the client to read or write to the Azure file share.
By default, data stored in Azure Files is encrypted with Microsoft-managed keys. With Microsoft-managed keys, Microsoft holds the keys to encrypt/decrypt the data, and is responsible for rotating them on a regular basis. You can also choose to manage your own keys, which gives you control over the rotation process. If you choose to encrypt your file shares with customer-managed keys, Azure Files is authorized to access your keys to fulfill read and write requests from your clients. With customer-managed keys, you can revoke this authorization at any time, but this means that your Azure file share will no longer be accessible via SMB or the FileREST API.
Azure Files uses the same encryption scheme as the other Azure storage services such as Azure Blob storage. To learn more about Azure storage service encryption (SSE), see Azure storage encryption for data at rest.
Storage tiers
Azure Files offers two different tiers of storage, premium and standard, to allow you to tailor your shares to the performance and price requirements of your scenario:
- Premium file shares: Premium file shares are backed by solid-state drives (SSDs) and are deployed in the FileStorage storage account type. Premium file shares provide consistent high performance and low latency, within single-digit milliseconds for most IO operations, for IO-intensive workloads. This makes them suitable for a wide variety of workloads like databases, web site hosting, and development environments. Premium file shares are only available in a provisioned billing model. For more information on the provisioned billing model for premium file shares, see Understanding provisioning for premium file shares.
- Standard file shares: Standard file shares are backed by hard disk drives (HDDs) and are deployed in the general purpose version 2 (GPv2) storage account type. Standard file shares provide reliable performance for IO workloads that are less sensitive to performance variability such as general-purpose file shares and dev/test environments. Standard file shares are only available in a pay-as-you-go billing model.
Enable standard file shares to span up to 100 TiB
By default, standard file shares can span only up to 5 TiB, although the share limit can be increased to 100 TiB. To do this, large file share feature must be enabled at the storage account-level. Premium storage accounts (FileStorage storage accounts) don't have the large file share feature flag as all premium file shares are already enabled for provisioning up to the full 100 TiB capacity.
You can only enable large file shares on locally redundant or zone redundant standard storage accounts. Once you have enabled the large file share feature flag, you can't change the redundancy level to geo-redundant or geo-zone-redundant storage.
To enable large file shares on an existing storage account, navigate to the Configuration view in the storage account's table of contents, and switch the large file share rocker switch to enabled:
You can also enable 100 TiB file shares through the Set-AzStorageAccount PowerShell cmdlet and the az storage account update Azure CLI command.
To learn more about how to enable large file shares on new storage accounts, see creating an Azure file share.
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Regional availability
Standard file shares with 100 TiB capacity limit are available globally in all Azure regions, except:
- Locally redundant storage: All regions, except for South Africa North, South Africa West, Germany West Central, and Germany North.
- Zone redundant storage: Supported for all regions where Zone redundant storage is supported, except for Japan East, North Europe, South Africa North.
- Geo-redundant/GeoZone redundant storage: Not supported.
Azure file sync region availability
Azure File Sync is available in the following regions:
| Azure cloud | Geographic region | Azure region | Region code |
|---|---|---|---|
| Public | Asia | East Asia | eastasia |
| Public | Asia | Southeast Asia | southeastasia |
| Public | Australia | Australia East | australiaeast |
| Public | Australia | Australia Southeast | australiasoutheast |
| Public | Brazil | Brazil South | brazilsouth |
| Public | Canada | Canada Central | canadacentral |
| Public | Canada | Canada East | canadaeast |
| Public | Europe | North Europe | northeurope |
| Public | Europe | West Europe | westeurope |
| Public | France | France Central | francecentral |
| Public | France | France South* | francesouth |
| Public | India | Central India | centralindia |
| Public | India | South India | southindia |
| Public | Japan | Japan East | japaneast |
| Public | Japan | Japan West | japanwest |
| Public | Korea | Korea Central | koreacentral |
| Public | Korea | Korea South | koreasouth |
| Public | South Africa | South Africa North | southafricanorth |
| Public | South Africa | South Africa West* | southafricawest |
| Public | UAE | UAE Central* | uaecentral |
| Public | UAE | UAE North | uaenorth |
| Public | UK | UK South | uksouth |
| Public | UK | UK West | ukwest |
| Public | US | Central US | centralus |
| Public | US | East US | eastus |
| Public | US | East US 2 | eastus2 |
| Public | US | North Central US | northcentralus |
| Public | US | South Central US | southcentralus |
| Public | US | West Central US | westcentralus |
| Public | US | West US | westus |
| Public | US | West US 2 | westus2 |
| US Gov | US | US Gov Arizona | usgovarizona |
| US Gov | US | US Gov Texas | usgovtexas |
| US Gov | US | US Gov Virginia | usgovvirginia |
Azure File Sync supports syncing only with an Azure file share that's in the same region as the Storage Sync Service.
For the regions marked with asterisks, you must contact Azure Support to request access to Azure Storage in those regions. The process is outlined in this document.
Redundancy
To protect the data in your Azure file shares against data loss or corruption, all Azure file shares store multiple copies of each file as they are written. Depending on the requirements of your workload, you can select additional degrees of redundancy. Azure Files currently supports the following data redundancy options:
- Locally redundant: Locally redundant storage, often referred to as LRS, means that every file is stored three times within an Azure storage cluster. This protects against loss of data due to hardware faults, such as a bad disk drive.
- Zone redundant: Zone redundant storage, often referred to as ZRS, means that every file is stored three times across three distinct Azure storage clusters. The three distinct Azure storage clusters each store the file three times, just like with locally redundant storage, and are physically isolated in different Azure availability zones. Availability zones are unique physical locations within an Azure region. Each zone is made up of one or more datacenters equipped with independent power, cooling, and networking. A write to storage is not accepted until it is written to the storage clusters in all three availability zones.
- Geo-redundant: Geo-redundant storage, often referred to as GRS, is like locally redundant storage, in that a file is stored three times within an Azure storage cluster in the primary region. All writes are then asynchronously replicated to a Microsoft-defined secondary region. Geo-redundant storage provides 6 copies of your data spread between two Azure regions. In the event of a major disaster such as the permanent loss of an Azure region due to a natural disaster or other similar event, Microsoft will perform a failover so that the secondary in effect becomes the primary, serving all operations. Since the replication between the primary and secondary regions are asynchronous, in the event of a major disaster, data not yet replicated to the secondary region will be lost. You can also perform a manual failover of a geo-redundant storage account.
- Geo-zone redundant: Geo-zone redundant storage, often referred to as GZRS, is like zone redundant storage, in that a file is stored nine times across 3 distinct storage clusters in the primary region. All writes are then asynchronously replicated to a Microsoft-defined secondary region. The failover process for geo-zone-redundant storage works the same as it does for geo-redundant storage.
Standard Azure file shares support all four redundancy types, while premium Azure file shares only support locally redundant and zone redundant storage.
General purpose version 2 (GPv2) storage accounts provide two additional redundancy options that are not supported by Azure Files: read accessible geo-redundant storage, often referred to as RA-GRS, and read accessible geo-zone-redundant storage, often referred to as RA-GZRS. You can provision Azure file shares in storage accounts with these options set, however Azure Files does not support reading from the secondary region. Azure file shares deployed into read-accessible geo- or geo-zone redundant storage accounts will be billed as geo-redundant or geo-zone-redundant storage, respectively.
Important
Geo-redundant and Geo-zone redundant storage have the capability to manually failover storage to the secondary region. We recommend that you do not do this outside of a disaster when you are using Azure File Sync because of the increased likelihood of data loss. In the event of a disaster where you would like to initiate a manual failover of storage, you will need to open up a support case with Microsoft to get Azure File Sync to resume sync with the secondary endpoint.
Migration
If you have an existing Windows file server, Azure File Sync can be directly installed in place, without the need to move data over to a new server. If you are planning to migrate to a new Windows file server as a part of adopting Azure File Sync, there are several possible approaches to move data over:
Create server endpoints for your old file share and your new file share and let Azure File Sync synchronize the data between the server endpoints. The advantage to this approach is that it makes it very easy to oversubscribe the storage on your new file server, since Azure File Sync is cloud tiering aware. When you are ready, you can cut over end users to the file share on the new server and remove the old file share's server endpoint.
Create a server endpoint only on the new file server, and copy data into from the old file share using
robocopy. Depending on the topology of file shares on your new server (how many shares you have on each volume, how free each volume is, etc.), you may need to temporarily provision additional storage as it is expected thatrobocopyfrom your old server to your new server within your on-premises datacenter will complete faster than Azure File Sync will move data into Azure.
It is also possible to use Data Box to migrate data into an Azure File Sync deployment. Most of the time, when customers want to use Data Box to ingest data, they do so because they think it will increase the speed of their deployment or because it will help with constrained bandwidth scenarios. While it's true that using a Data Box to ingest data into your Azure File Sync deployment will decrease bandwidth utilization, it will likely be faster for most scenarios to pursue an online data upload through one of the methods described above. To learn more about how to use Data Box to ingest data into your Azure File Sync deployment, see Migrate data into Azure File Sync with Azure Data Box.
A common mistake customers make when migrating data into their new Azure File Sync deployment is to copy data directly into the Azure file share, rather than on their Windows file servers. Although Azure File Sync will identify all of the new files on the Azure file share, and sync them back to your Windows file shares, this is generally considerably slower than loading data through the Windows file server. Many Azure copy tools, such as AzCopy, have the additional downside of not copying all of the important metadata of a file such as timestamps and ACLs.
Antivirus
Because antivirus works by scanning files for known malicious code, an antivirus product might cause the recall of tiered files. In versions 4.0 and above of the Azure File Sync agent, tiered files have the secure Windows attribute FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS set. We recommend consulting with your software vendor to learn how to configure their solution to skip reading files with this attribute set (many do it automatically).
Microsoft's in-house antivirus solutions, Windows Defender and System Center Endpoint Protection (SCEP), both automatically skip reading files that have this attribute set. We have tested them and identified one minor issue: when you add a server to an existing sync group, files smaller than 800 bytes are recalled (downloaded) on the new server. These files will remain on the new server and will not be tiered since they do not meet the tiering size requirement (>64kb).
Note
Antivirus vendors can check compatibility between their product and Azure File Sync using the Azure File Sync Antivirus Compatibility Test Suite, which is available for download on the Microsoft Download Center.
Backup
Like antivirus solutions, backup solutions might cause the recall of tiered files. We recommend using a cloud backup solution to back up the Azure file share instead of an on-premises backup product.
If you are using an on-premises backup solution, backups should be performed on a server in the sync group that has cloud tiering disabled. When performing a restore, use the volume-level or file-level restore options. Files restored using the file-level restore option will be synced to all endpoints in the sync group and existing files will be replaced with the version restored from backup. Volume-level restores will not replace newer file versions in the Azure file share or other server endpoints.
Note
Bare-metal (BMR) restore can cause unexpected results and is not currently supported.
Note
With Version 9 of the Azure File Sync agent, VSS snapshots (including Previous Versions tab) are now supported on volumes which have cloud tiering enabled. However, you must enable previous version compatibility through PowerShell. Learn how.
Azure File Sync agent update policy
The Azure File Sync agent is updated on a regular basis to add new functionality and to address issues. We recommend you configure Microsoft Update to get updates for the Azure File Sync agent as they're available.
Major vs. minor agent versions
- Major agent versions often contain new features and have an increasing number as the first part of the version number. For example: *2.*.**
- Minor agent versions are also called 'patches' and are released more frequently than major versions. They often contain bug fixes and smaller improvements but no new features. For example: **.3.**
Upgrade paths
There are four approved and tested ways to install the Azure File Sync agent updates.
- (Preferred) Configure Microsoft Update to automatically download and install agent updates.
We always recommend taking every Azure File Sync update to ensure you have access to the latest fixes for the server agent. Microsoft Update makes this process seamless, by automatically downloading and installing updates for you. - Use AfsUpdater.exe to download and install agent updates.
The AfsUpdater.exe is located in the agent installation directory. Double-click the executable to download and install agent updates. - Patch an existing Azure File Sync agent by using a Microsoft Update patch file, or a .msp executable. The latest Azure File Sync update package can be downloaded from the Microsoft Update Catalog.
Running a .msp executable will upgrade your Azure File Sync installation with the same method used automatically by Microsoft Update in the previous upgrade path. Applying a Microsoft Update patch will perform an in-place upgrade of an Azure File Sync installation. - Download the newest Azure File Sync agent installer from the Microsoft Download Center.
To upgrade an existing Azure File Sync agent installation, uninstall the older version and then install the latest version from the downloaded installer. The server registration, sync groups, and any other settings are maintained by the Azure File Sync installer.
Automatic agent lifecycle management
With agent version 6, the file sync team has introduced an agent auto-upgrade feature. You can select either of two modes and specify a maintenance window in which the upgrade shall be attempted on the server. This feature is designed to help you with the agent lifecycle management by either providing a guardrail preventing your agent from expiration or allowing for a no-hassle, stay current setting.
- The default setting will attempt to prevent the agent from expiration. Within 21 days of the posted expiration date of an agent, the agent will attempt to self-upgrade. It will start an attempt to upgrade once a week within 21 days prior to expiration and in the selected maintenance window. This option does not eliminate the need for taking regular Microsoft Update patches.
- Optionally, you can select that the agent will automatically upgrade itself as soon as a new agent version becomes available (currently not applicable to clustered servers). This update will occur during the selected maintenance window and allow your server to benefit from new features and improvements as soon as they become generally available. This is the recommended, worry-free setting that will provide major agent versions as well as regular update patches to your server. Every agent released is at GA quality. If you select this option, Microsoft will flight the newest agent version to you. Clustered servers are excluded. Once flighting is complete, the agent will also become available on Microsoft Download Center aka.ms/AFS/agent.
Changing the auto-upgrade setting
The following instructions describe how to change the settings after you've completed the installer, if you need to make changes.
Open a PowerShell console and navigate to the directory where you installed the sync agent then import the server cmdlets. By default this would look something like this:
You can run Get-StorageSyncAgentAutoUpdatePolicy to check the current policy setting and determine if you want to change it.
To change the current policy setting to the delayed update track, you can use:
To change the current policy setting to the immediate update track, you can use:
Agent lifecycle and change management guarantees
Azure File Sync is a cloud service, which continuously introduces new features and improvements. This means that a specific Azure File Sync agent version can only be supported for a limited time. To facilitate your deployment, the following rules guarantee you have enough time and notification to accommodate agent updates/upgrades in your change management process:
- Major agent versions are supported for at least six months from the date of initial release.
- We guarantee there is an overlap of at least three months between the support of major agent versions.
- Warnings are issued for registered servers using a soon-to-be expired agent at least three months prior to expiration. You can check if a registered server is using an older version of the agent under the registered servers section of a Storage Sync Service.
- The lifetime of a minor agent version is bound to the associated major version. For example, when agent version 3.0 is released, agent versions 2.* will all be set to expire together.
Note
Installing an agent version with an expiration warning will display a warning but succeed. Attempting to install or connect with an expired agent version is not supported and will be blocked.
Next steps
Hello friends, Today I will share 10 best file sync software of 2019. Users can sync all files and folder on their Windows PC/Laptops. All these software will work on every Windows computer. It will synchronize data on Windows 8, 8.1 and 10. You can sync the external drive of your computer. These are top file sync software of 2016, 2017 and 2018.
There is a big advantage if you save your files outside of the computer too using the synchronization system. You can retrieve any data back because that data is available on the other side as well. Previously, taking a backup of our precious data was very tuff. We have to transfer file one by one manually which consumes too much time. Though, technology increase and now we have a sync feature that is used to take essential data on the other side automatically. Have you ever thought that what are some best file sync software? Well, in today’s article we are going to discuss the top 10 best file sync software of 2019.
Contents
What is File Sync Software?
Before we head up to the list of top 10 best file sync software 2019, let’s gain some knowledge of what file sync software is? The file sync software is a software which is used to deliver your documents such as audio, video, photo, etc. to any other place automatically. Wait! That is not only the task of file syncing software. Well, this task can be done by many of already available software. So, what’s the difference between it and them? File sync software using synchronization feature which means whenever your device will have a new media it will send a copy of that media to the other place where you have targeted it. This is the main task which it does.
Top 10 Best File Sync Software of 2019 – Sync Folders Windows 10, 8.1 & 8
The wait is over now. We are now going to check out the top 10 best file sync software of 2019 right here. I have explained the details of each file sync software separately. However, before I start telling you about them let me tell you that they have their place. They make their name after doing hard work. I am just telling that what they give you and what kind of services are they providing. Read their details and think about it that which one you should use. So, let’s start the list from the top-ranked and best file sync software.
Best File Sync Software of 2019
- GoodSync
- Dropbox
- FreeFileSync
- Allway Sync
- Mozy Sync
- SugarSync
- ViceVersa Pro
- SyncToy
- SyncBack
- ResilioSync
Read more: How to Run System File Checker to Repair Corrupted Files on Windows 10
GoodSync
As its name describes, it is the best file sync software which you have ever wondered. The features and quality if this software beats all other available file sync software. It is a powerful file backup and sync software ever. It also has the best data backup and synchronization solutions. GoodSync automatically syncs delete or creation as well as other changes which are made by the customers in folders or subfolders.
Dropbox
Dropbox is the most popular cloud storage service which is not only a storage area but also has sync service as well. To sync anything a user only need to put that media in the dropbox folder nothing else he or she has to do. However, its a kind of premium sync service but is also available in the form of software as well. You will get 2GB of free storage after that you have to chose a plan for more storage. One more thing which you need to remember is that connect the software with the same Dropbox account in which data you want to store.
Read more: How to Open Rar Files on Windows 10 – 2 Methods
FreeFileSync
FreeFileSync is available for Linux, Mac, and Windows. It is the best file syncing tool that examines your data separately for frequent use and makes an extra copy of the backup. This file sync software is easy to install and has a convenient setup process for trouble free usage. A user has to plug it in, and after that, the files will start synchronizing automatically. The sad thing is that if you want to manage large file, then you have to be patient because it’s going to take you more time as compared to the normal one.
Read more: How to Show Hidden Files in Windows 10 Without Software
Allway Sync
Allway Sync is one of the best file sync software because it automatically detects the deleted file or folder for you. It also has the Cloud file synchronization system which syncs large or big folders from desktops, tablets, laptops, and USB drivers. The one more best part if that it is available for free for personal use where for commercial you have to buy one. It is efficient in syncing to portable hard drives, cloud drives, systems, and networks.
Read more: How to Backup Computer to External Hard Drive on Windows 10, 8, 7 and 8.1 PC/Laptops
Mozy Sync
Mozy Sync is available for Mac and Windows. It is a web-based file sync application that makes a copy of the original file to retrieve them in emergency situations. You can take backup of your data up to three computers which makes it the best file sync software ever. It can also take backup of a device that has gone into factory reset mistakenly. However, this is little expensive when big companies like Google and Microsoft are giving you free storage.
SugarSync
SugarSync is more convenient and similar file sync software. It can recover up to five versions of folders. However, the price of the software is pretty high. Also, it does not have any encryption key for online backup in personal use. SugarSync provides free account trial where others didn’t. Overall, the software is good and has a simple installation process. However, not good in case of economic phase as it does not have much privacy features.
ViceVersa Pro
ViceVersa Pro is the best file sync software in the market. It not only takes the backup of file and folders but also compares files and folders as well. It is the best time saving, innovative, and automatic file sync software ever. A user can view the result and modify the action or something else which he or she wants to do. You can take backup of your data according to your preference.
Read more: How to Convert MOV to MP4 for Free on Windows PC/Laptops – Top 5 Best Methods
File Synchronization Failed Incredibuild
SyncToy
SyncToy can be called as a lite version of other file sync software which I told earlier. You can sync two folders together but can not ake multiple because it does not have wide network system. You can say that its a kind of handy software for those peoples who want to store a copy of important on the same network. SyncToy is available for Windows to be download and used.
SyncBack
SyncBack is the another best file sync software that you install and start using to syncing your files and folders. It has many versions of its programs with different features that is SyncBackFree, SyncBack Lite, SyncBackSE, and SyncBackPro. All versions will allow you to sync files and folders, back up to FTP, compress files, and more. You can also sync your data from Dropbox and Google Drive too. However, if you wish to sync over one to another computer than for that, you have to buy SyncBack Touch.
Read more: How to Open RAR Files on Mac 2018 – Top 2 Methods
ResilioSync
File Synchronization Freeware
ResilioSync is also known as BitTorrent Sync. It is a peer-to-peer synchronization program. As similar to Dropbox where you have to put the file into the Dropbox folder to sync. In ResilioSync, you have to pick folder which you want to sync with another device. When a user accepts the request to share the folder, then you will get an option to chose that which folder should you want to use to download the files. It is available for free to use. However, they have restricted some features so that you have to purchase it for that.
Last Words on Best File Sync Software
These are the top 10 best file sync software of the year 2019. You can try any of the file sync software from the above list. There is some more file sync software also available which can be used to sync files over the internet. I found these file sync software best for everyone who needs to sync files over the internet. That is why I have added them in this list of top 10 best file sync software 2019. I hope you are now using a best file sync software from this list. Share this article with your friends and family members so that they can also get the best file sync software of 2019.
File Synchronization Software Review
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