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https://issues.apache.org/jira/browse/WICKET-4478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ondra Žižka updated WICKET-4478:
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Attachment: fix-WICKET-4478.patch
Something like this.
It's a 2-level dir, using first char.
> DiskDataStore to use multi-level directory structure to avoid slowness when
> thousands of sessions are active.
> -------------------------------------------------------------------------------------------------------------
>
> Key: WICKET-4478
> URL: https://issues.apache.org/jira/browse/WICKET-4478
> Project: Wicket
> Issue Type: Improvement
> Components: wicket
> Affects Versions: 1.5.5
> Environment: ext3, NTFS, and common FSs in general.
> Reporter: Ondra Žižka
> Attachments: fix-WICKET-4478.patch
>
>
> If the number of sessions opened rises to thousands, DiskDataStore, which is
> default, doesn't scale, because it creates one dir for each session, and most
> filesystems don't perform well with large number of records in a dir. More,
> there's a hard limit e.g. for ext3 it's 31998.
> So I suggest to make it multi-level - simply, instead of "tmp/abcdef" it
> would be "tmp/a/b/cdef", where number of levels added would be configurable.
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