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https://issues.apache.org/jira/browse/IGNITE-5938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16257369#comment-16257369
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ASF GitHub Bot commented on IGNITE-5938:
----------------------------------------

GitHub user glukos opened a pull request:

    https://github.com/apache/ignite/pull/3066

    IGNITE-5938 Try to enable v2 serializer

    

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/gridgain/apache-ignite master-v2ser

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/ignite/pull/3066.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #3066
    
----
commit 6e3f4043c6ab58f6ad5109bbdaf4832685bc7df8
Author: Ivan Rakov <ivan.glu...@gmail.com>
Date:   2017-11-17T18:34:54Z

    IGNITE-5938 Try to enable v2 serializer

----


> Implement WAL logs compaction and compression after checkpoint
> --------------------------------------------------------------
>
>                 Key: IGNITE-5938
>                 URL: https://issues.apache.org/jira/browse/IGNITE-5938
>             Project: Ignite
>          Issue Type: Improvement
>          Components: persistence
>    Affects Versions: 2.1
>            Reporter: Alexey Goncharuk
>            Assignee: Ivan Rakov
>             Fix For: 2.4
>
>
> Currently, we simply move WAL segments to archive when WAL segment is written 
> and delete when checkpoint history becomes too old. 
> Archived WAL segment contains physical delta records that are no longer 
> needed for rebalancing, so these records may be thrown away. In order to 
> optimize disk space and delta WAL rebalancing, we can do the following:
> 1) Clean the WAL segments from the physical records
> 2) Compress the cleaned segments (I expect this to be very effective since we 
> write full objects)



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