[DIRSERVER-1459] Adding members to a groupOfNames results in polynomial increase in JDBM partition size

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.5.5
• Fix Version/s: 1.5.6
• Environment: Any (tested on Linux and Mac OS X)
• Assignee: Kiran Ayyagari
• Reporter: Ben Hoyt
• Created: 19/Jan/10 22:45
• Updated: 26/May/10 10:43
• Resolved: 26/Feb/10 11:27

Description

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

Issue Links

• incorporates: DIRSERVER-1471 Providing a right fix for DIRSERVER-1459