[jira] [Closed] (JAMES-3601) Deletion of RabbitMQ mailqueues metadata

["Benoit Tellier (Jira)" <se...@james.apache.org>]

     [ https://issues.apache.org/jira/browse/JAMES-3601?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benoit Tellier closed JAMES-3601.
---------------------------------
    Resolution: Fixed

The ADR is now implemented.

> Deletion of RabbitMQ mailqueues metadata
> ----------------------------------------
>
>                 Key: JAMES-3601
>                 URL: https://issues.apache.org/jira/browse/JAMES-3601
>             Project: James Server
>          Issue Type: Improvement
>          Components: cassandra, Queue, rabbitmq
>    Affects Versions: 3.6.0
>            Reporter: Benoit Tellier
>            Priority: Major
>             Fix For: 3.7.0
>
>          Time Spent: 2h
>  Remaining Estimate: 0h
>
> https://www.mail-archive.com/server-dev@james.apache.org/msg70444.html
> While auditing a slow Cassandra on a performance test environment, I
> noticed ~25% of the data to be garbage of the Cassandra projection for
> the RabbitMQ mailqueue, as the following tables stats demonstrates:
>         Table: enqueuedmailsv3
>         SSTable count: 327
>         Space used (live): 4962189078
>         Space used (total): 4962189078
>         Space used by snapshots (total): 0
>         Off heap memory used (total): 4716757
>         SSTable Compression Ratio: 0.33271449206498704
>         Number of partitions (estimate): 6246
>         Table: deletedmailsv2
>         SSTable count: 69
>         Space used (live): 1132247647
>         Space used (total): 1132247647
>         Space used by snapshots (total): 0
>         Off heap memory used (total): 28743224
>         SSTable Compression Ratio: 0.5380381348994696
>         Number of partitions (estimate): 17669157
> We take up to 6 GB for an empty mail queue. A bit of cleanup would be
> welcome.
> The following document presents the design of the RabbitMQ mailqueue:
> https://github.com/apache/james-project/blob/master/src/adr/0031-distributed-mail-queue.md
> The following document presents the design that solves that the
> aforementioned issue but was sadly never implemented...
> https://github.com/apache/james-project/blob/master/src/adr/0032-distributed-mail-queue-cleanup.md
> This also means people having dedplication turned off never deletes
> associated blobs.
> I will fire a PR updating the status of this ADR. This ADR will end up
> on Linagora's short-middle term TODO list.
> Cheers,
> Benoit



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