Archive Store indexes can become significantly larger compared to older versions when they are in Normal mode

Versions / Builds Affected

20130510, 20130704, 20130723, 20131111

Status

Resolved

Problem Summary

Archive Store indexes can become significantly larger compared to older versions when they are in Normal mode

TT / JIRAID

1881

How to Identify

Indexes can become much larger than needed when building in Normal mode (as compared to Bulk mode (which is used when rebuilding an index) and the indexing schedule is set to Immediate (which translates to MARC checking every 10sec if indexing work needs to be performed). Arbitrary example: 1. An Archive Store contains 100k emails and is 25GB in size 2. The index folder is also 25GB in size (this was build in Normal mode) 3. You rebuild the index (which utilizes Bulk mode) and resulting index is only 5GB in size A factor which leads to this situation is the interval in which indexing occurs in combination with a constant flow of emails being archived.

Workaround / Fix Details

Fixed in MARC2014 build 20140616 ----- 20131111 Step 1 - to avoid indexes growing large going forward: Set the indexing interval (Configuration > Archive Stores > Index Management) to occur every 30min or less often Step 2 - to reduce the size of existing large indexes: Use the IndexCompactTool to compress existing large indexes (see the following article for further information on this tool: 8967 > How to compact Archive Store indexes (INTERNAL ONLY))

Required Actions

Upgrade to MARC2014 build 20140616 or newer