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https://issues.apache.org/jira/browse/IGNITE-9599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16625541#comment-16625541
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Ivan Bessonov commented on IGNITE-9599:
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[~a-polyakov] please inspect your tests, there are genuine failures in .NET,
maybe something else.
> Add ability to manage compression level for compressed WAL archives
> -------------------------------------------------------------------
>
> Key: IGNITE-9599
> URL: https://issues.apache.org/jira/browse/IGNITE-9599
> Project: Ignite
> Issue Type: Improvement
> Reporter: Andrey Kalinin
> Assignee: Alexand Polyakov
> Priority: Minor
>
> In some cases, WAL compression performance is not sufficient, i.e. new
> archives accumulate faster than old ones are compressed.
> We did some tests: the file size of 1GB is compressed at the default
> compression level for 1 minute, the output file size is ~120MB.
> After that, the compression rate was tested with compression-level=-1: 1 GB
> file is compressed in 13 seconds, the output file size is ~125MB.
> (from the [zlib manual|https://www.zlib.net/manual.html#Basic]:
> The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9: 1
> gives best speed, 9 gives best compression, 0 gives no compression at all
> (the input data is simply copied a block at a time). Z_DEFAULT_COMPRESSION
> requests a default compromise between speed and compression (currently
> equivalent to level 6).
> )
> So we need add an option to change the default compression level in the
> ignite configuration file.
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