Use the Advanced tab to change advanced and less often used options.  Some of these options can cause access or data loss if used improperly, so be careful when making changes in this tab.


Upload


Upload Window and Bandwidth

Use this option to limit the upload bandwidth available to this share according to a user-created schedule for this device. For more information on setting a bandwidth schedule, see the following article:


How do I limit upload/prefetch bandwidth?


Upload after other shares...

If enabled, this lowers the share's priority on upload. Shares with higher priority will be synced with the cloud first, and lower priority shares will sync only when there are no requests from higher priority shares in the queue.


For more information on share priority, see the Share Priority section of the following article:


Performance Tuning


Lock exclusion in Posix ERE

Use this option to disable lock generation for file types specified in a user-supplied Posix ERE.


Sync Temporary Locks

To improve performance, some lock files are not synced to the cloud by default. Enable this option to include these files in the syncing process.


Sync exclusion in Posix ERE

By default, certain temporary files are excluded from sync. To customize which files are uploaded, enable this feature and add a new Posix ERE.  

To create a Posix ERE, use the Sync Exclusion List generator by clicking the "Edit" button. 


Note: By default, we exclude *.bak, *.tmp, etc. If there are many of these files on the device, they will occupy disk space permanently. If these files are uploaded to the cloud, they can be cached out to reduce disk space usage.


For more information, see the following article:

How do I change what type of files to sync to the cloud?



Prefetch


Prefetch Window and Bandwidth

Use this option to limit the prefetch bandwidth available to this share according to a user-created schedule for this device. For more information on setting a bandwidth schedule, see the following article:


How do I limit upload/prefetch bandwidth?


Only prefetch specific files by file size

Use this option to set a minimum and maximum file size to prefetch. Only files that fall within the specified size range will be prefetched. This option affects both normal file sync operations as well as manual prefetch operations from MCM.




Only prefetch specific files by file type

Use this option to limit the file type to prefetch by creating a Posix ERE. To create a Posix ERE, use the Sync Exclusion List generator by clicking the "Edit" button. This option affects both normal file sync operations as well as manual prefetch operations from MCM.



  • Easy Edit panel of Edit Regular Expression: 
    • Support enter file names, folder names, file extensions, file name begin with and file name end with to generate Regular Expression. All files or folders meet the setting will do prefetch. If want to prefetch the files or folders in specify path, need manually enter Regular Expression.
  • Regular Expression panel of Edit Regular Expression: 
    • If want to prefetch two different folders' contents in same specify path, like "Share/folde r1" and "Share/folder2", can manually enter Regular Expression like "(^|/)Share\/folde r1|folder2(/|$)". (If the folder name contains space, the expression also can contains space.)
    • If want to prefetch one folder that name is folder2 in specify path, like "Share/folder1/folder2", can manually enter Regular Expression like "(^|/)Share\/folder1\/folder2(/|$)".


Note: 

  • For prefetch settings, need to enable Prefetch for CacheDrive on share - PERMISSIONs - Gateway  panel first.
  • The Prefetch settings on the share - ADVANCED - Prefetch panel will be applied to all CacheDrives that enabled Prefetch for this share.
  • But if you want some special settings for a CacheDrive, you can edit the Prefetch settings on the device - ADVANCED - Prefetch panel of this CacheDrive.
  • If the Prefetch filters have been set to the CacheDrive, the filter settings on the share - ADVANCED -Prefetch panel will be invalid for this CacheDrive.


SMB


Don't use ea to save streams

This turns off the xattr setting in Samba which can improve file performance. Removing xattr disables extended attribute settings which may affect features such as Windows ACL.  This is generally not needed.


Force SMB encrypt

Force encryption to be used for SMB access.


Prevent folder rename when used (slower)

Prevents users from renaming folders if another user has an open file in the folder or a sub-folder. This results in a folder lock.


Disable oplocks

Oplocks allow a client to download and cache a file on its hard drive while making changes. If a second client wants to access the file, the first client receives a break and must synchronize the file back to the server.  This can give significant performance gains in some cases.  Some programs insist on synchronizing the contents of the entire file back to the server for a single change.


Hide share from browsing

This option prevents a share from being discovered by browsing in Explorer or Finder. Users with access permissions can still access the share.


Allow users to recover own file using shadow copy interface

This option allows users to use the shadow copy interface of Windows to recover versions of a file. After enabling this option for a share, right-click a file and select Properties -> Previous versions. You can see the previous versions of the file, select the version you want to recover, and use the Restore button to recover the file.


Note that there are some limitations:

  1. Versions must be in the same parent folder and have the same names. Renamed/moved versions will not be listed in the Previous Versions panel.
  2. This option currently does not folders.
  3. This option currently does not support stub files.
  4. Only the last 100 versions can be listed on the Previous Versions panel.
  5. Recovering an old version will replace the current version.
  6. When recovering a version, there is no size limitation for the version. Recovering a very large file (10GB for example) may fail.
  7. We use temporary directories in the CacheDrive to store old versions of a file when the user views the Previous Versions panel of the file. Users may see these paths in some applications (such as the "Recent" page of Word).
  8. The temporary directories will be deleted 2 hours after the user opens the Previous Versions panel. If the user keeps the Previous Versions panel open for a long time, the user may see the below error with garbled code when trying to restore a version.



Note: There are some account optimization/tuning options in Account Options. 



RTC

Use this tab to enable/disable Remote Team Collaboration features for the share.


For more information on the file types affected by each RTC slider, see the following article:


Which file extensions does each RTC type support?



ECHO

Select an account that was created from MCM -> Apps -> Dropbox ECHO or OneDrive ECHO, and select a CacheDrive as a master gateway to enable ECHO for a share. The master gateway will be used to sync files with Dropbox or OneDrive.



Transfer

Use this tab to enable simultaneous upload and download for better performance when syncing large files.