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https://issues.apache.org/jira/browse/DIRSERVER-1459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12835873#action_12835873
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Emmanuel Lecharny commented on DIRSERVER-1459:
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Hi Ben,
as a coincidence, we discussed this exact issue just this morning. Alex is
currently working this out, but it seems to be a bug in the backend we are
using. We are really doing our best to determinate which part of the code is
causing this issue, and have successfully been able to write a small piece of
code that demonstrates the bug (out of the server).
It will probably take a bit more time, I have no idea how much, but be sure
that we are realizing how big is the bug, and we want to get it fix, and
probably release another version before 2.0 as soon as the bug is fixed.
Sorry for the delay... Life is not that simple :/
> Adding members to a groupOfNames results in polynomial increase in JDBM
> partition size
> --------------------------------------------------------------------------------------
>
> Key: DIRSERVER-1459
> URL: https://issues.apache.org/jira/browse/DIRSERVER-1459
> Project: Directory ApacheDS
> Issue Type: Bug
> Affects Versions: 1.5.5
> Environment: Any (tested on Linux and Mac OS X)
> Reporter: Ben Hoyt
> Assignee: Alex Karasulu
> Priority: Blocker
> Fix For: 1.5.6
>
> Attachments: DIRSERVER-1459.tar.gz, screenshot-1.jpg
>
>
> I noticed a polynomial increase JDBM partition size and therefore disk usage
> when adding users to groups in my ApacheDS instance. The vast majority of
> the usage (95+% once you hit a couple thousand users) is in
> workingDirectory/partitionId/master.db
> Further testing showed that simply adding a user is linear, as one would
> expect, and as 'apacheds-tools capacity' confirms. It is only when a user is
> made a member of a group that the JDBM partition size shoots up.
> Example statistics:
> Add 16,000 users - JDBM partition size = ~70 megabytes
> Now add those same 16,000 users to a single group (all in the same group) -
> JDBM partition size = ~19 GIGABYTES
> I'll work to attach a test case and some more numbers from my tests
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