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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2018/01/09 16:37:56 UTC

[GitHub] ivankelly opened a new pull request #1044: Compact algo

ivankelly opened a new pull request #1044: Compact algo
URL: https://github.com/apache/incubator-pulsar/pull/1044
 
 
   Compaction will go through the topic in two passes. The first pass
   selects latest offset for each key in the topic. Then the second pass
   writes these values to a ledger.
   
   The two passes are required to avoid holding the payloads of each of
   the latest values in memory, as the payload can be many orders of
   magnitude larger than a message id.

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