Compactions

  • Deepak Vohra
Chapter

Abstract

Compactions were introduced in Chapter 2 . In this chapter, I will discuss compactions in more detail. Each flush of the MemStore generates a StoreFile, which is façade on an HFile. The MemStore size at which a flush is performed is set in hbase.hregion.memstore.flush.size, which is 128MB by default. The MemStore size is checked at a frequency set in hbase.server.thread.wakefrequency, which has a default of 10,000 ms. If the number of StoreFiles in a store exceed some limits/thresholds, the files are compacted into larger StoreFiles. Compaction is the process of creating a larger StoreFile (HFile) file by merging smaller StoreFilefiles.

Keywords

Good Compaction Configuration Property Reference File Store File Region Splitting 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Deepak Vohra 2016

Authors and Affiliations

  • Deepak Vohra
    • 1
  1. 1.White RockCanada

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