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vm:proxmox:pbs:performance [2026/04/09 13:53] – niziakvm:proxmox:pbs:performance [2026/10/29 09:07] (current) – niziak
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 ====== performance ====== ====== performance ======
 +
 +===== pbs datastore tunning =====
 +
 +Overview of PBS Sync Levels
 +
 +  * ''filesystem (Default)'': Triggers syncfs(2) across the entire filesystem right after a backup finishes. It balances strong crash-resistance with performance.
 +  * ''file'': Triggers an fsync(0) on every individual chunk insertion. It provides the **highest level of consistency**,
 +    but significantly slows down performance on slower or network-attached storages.
 +  * ''none'': Performs no explicit syncing when writing chunks, relying on the kernel's background flushes (via dirty_expire_centisecs).
 +    It is the **fastest** option, but risks data loss or broken backups if a sudden power loss occurs.
  
 ===== FS tuning ===== ===== FS tuning =====