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problem understanding the documentation for the TieredMergePolicy class
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Hello, I've read the documentation about the TiredMergePolicy class. But I just can't get behind what this sentence is trying to state: [..] For normal merging, this policy first computes a "budget" of how many segments are allowed by be in the index. [...] http://lucene.apache.org/core/old_versioned_d...) <http://lucene.apache.org/core/old_versioned_d...> Would somebody be so kind to explain it to me? Thanks, thanks a lot Thomas
You start by defining minimum segment size, number of segments per tier, and maximum segment size. From that, the "budget" or maximum number of segments allowed is calculated. Each move up a level (tier) increases the size of the segment allowed at that next higher tier until the largest segment size is reached. Then the code compares the number of segments eligible for merge to that limit. If over that limit, the code then scores each merge and selects the merge with the best score. -- Jack Krupansky -----Original Message----- From: thomas Sent: Tuesday, June 12, 2012 4:43 AM To: Subject: problem understanding the documentation for the TieredMergePolicy class Hello, I've read the documentation about the TiredMergePolicy class. But I just can't get behind what this sentence is trying to state: [..] For normal merging, this policy first computes a "budget" of how many segments are allowed by be in the index. [...] http://lucene.apache.org/core/old_versioned_d...) <http://lucene.apache.org/core/old_versioned_d...> Would somebody be so kind to explain it to me? Thanks, thanks a lot Thomas