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What does the AltaVault message: "evicted slab X had been in evicter for Y seconds" mean?

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Category:
altavault
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dp
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Applies to

  • AltaVault
  • AVA400
  • AVA800
  • AVA-v

Answer

  • The evicter maintains free space in the local cache for new data.
  • By default, eviction maintains local cache utilization at 90%.
  • Oldest data "slab" is evicted first.

A notice-level message is logged when data younger than 30 days is evicted.

May 19 09:26:07 localhost rfsd[23260]: [evicter.NOTICE] (24411) evicted slab 0x8de09d0000; had been in evicter for 299062 seconds; instime=1463314903

  • This slab was 299062 seconds old (3.46 days) when it was evicted.
  • instime is the file timestamp in epoch time.

Additional Information 

  • When encoding reference data in an existing slab its timestamp is refreshed to the current date and time.
  • This allows the evicter to remove the oldest and least used data first.
  • Ideally, the local cache would hold 4-6 weeks of backups.

 

 

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