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Prevent placeholder file hydration

Feature availability

Available in: Resilio 6.0 and newer
Applicable to: End-user Agents running on Windows

Some file system crawlers, such as antivirus software or indexing services, may trigger placeholder file hydration, which can lead to high system load on your Nasuni Edge Devices and increased network traffic. To prevent this, you can configure a list of processes excluded from initiating placeholder file hydration.

To prevent select system processes from triggering placeholder file hydration, add the tss_block_list custom parameter to the Agent profile with a list of process names.

  • Define the list as rules following the same pattern as ignore lists, separated by ;.
  • * and ? wildcards are allowed.
  • s0: prefix — The rule applies only to session-0 (system/service) processes: indexers, AV, background crawlers.
  • ! prefix — Exception, which has higher priority than a block rule.
  • Default: s0:* — All system/service processes are blocked from triggering placeholder files hydration. User applications (Explorer, Office) are unaffected.
  • The list is case-insensitive.

Examples

  • s0:;!s0:C:/Windows/ — Block system crawlers, except those running from C:\Windows.
  • s0:*;notepad.exe — Additionally block Notepad for all users.
  • Empty value — Disabled.

Note

  • Already downloaded files are not affected by this setting.
  • Access denied errors are logged in sync.log: hydration blocked for process '...' / population blocked for process '...'.
  • Changes apply on the fly; a process actively using the share may keep its old verdict for some time due to caching.