Commits on Nov 20, 2022

1. Compact tenant TSDBs after 3h inactivity …

   The Receiver tenant retention mechanism has an edge case when a
   tenant TSDB gets evicted and uploaded to S3. Since there is a delay
   between uploads to S3 and downloads in Store Gateways, if a user
   executes a query between the upload and download time, they may
   not see the latest head block from the evicted tenant.
   
   As a result, this commit decouples head compaction from tenant eviction.
   Head compaction, as in Prometheus, will happen if there are no new appends
   after 1.5x max-block-size. This will also cause the compacted block to be
   uploaded to S3 by the shipper. Eviction will then kick in which will cause
   the tenant TSDB to be deleted.
   
   By this time, the latest head block would have been picked up by store-gateway
   and would be available during query execution.
   
   Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>

   

   fpetkovski committed Nov 20, 2022
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