*BUMP* Sorry,
/David On Sat, Nov 3, 2012 at 3:57 PM, David Koch <[email protected]> wrote: > Hello, > > Are scans faster when compression is activated? The HBase book by Lars > George seems to suggest so (p424, Section on "Compression" in chapter > "Performance Tuning"). > > "... compression usually will yield overall better performance, because > the overhead of the CPU performing the compression and de- compression is > less than what is required to read more data from disk." > > I searched around for a bit and found this: > http://gbif.blogspot.fr/2012/02/performance-evaluation-of-hbase.html. The > author conducted a series of scan performance tests on tables of up to > 200million rows and found that compression actually slowed down read > performance slightly - albeit at lower CPU load. > > Thank you, > > /David >
