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Posted to issues@ignite.apache.org by "Artem Budnikov (JIRA)" <ji...@apache.org> on 2018/10/02 15:16:00 UTC
[jira] [Commented] (IGNITE-8090) Explain disk space compaction by
WAL and compaction techniques
[ https://issues.apache.org/jira/browse/IGNITE-8090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16635673#comment-16635673 ]
Artem Budnikov commented on IGNITE-8090:
----------------------------------------
The size of the WAL archive can now be limited by the new parameter (https://issues.apache.org/jira/browse/IGNITE-9399). I added the description to the 2.7 version of the page: [https://apacheignite.readme.io/v2.6/docs/write-ahead-log-1#section-wal-modes.]
I added the second item to a section here: https://apacheignite.readme.io/v2.6/docs/durable-memory-tuning#section-increasing-wal-segment-size . [~pgarg] please review.
I think the first point is too technical for end users (introduces new details like logical and physical records, which would have to be explained, which would complicate things). Moreover, users do not have to do anything—Ignite makes sure that everything is in place for both crash recovery and rebalancing.
> Explain disk space compaction by WAL and compaction techniques
> --------------------------------------------------------------
>
> Key: IGNITE-8090
> URL: https://issues.apache.org/jira/browse/IGNITE-8090
> Project: Ignite
> Issue Type: New Feature
> Components: documentation
> Reporter: Denis Magda
> Assignee: Artem Budnikov
> Priority: Major
> Fix For: 2.7
>
>
> Explain how WAL occupies the disk space and how to enable the compaction:
> https://cwiki.apache.org/confluence/display/IGNITE/Ignite+Persistent+Store+-+under+the+hood#IgnitePersistentStore-underthehood-WALHistorySize
> There needs to be a special section in WAL documentation as well as in the capacity planning.
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