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From "Weijun Li" <>
Subject RE: compression
Date Thu, 01 Apr 2010 07:07:55 GMT
Thrift client doesn’t seem to compress anything unless you change thrift protocol or use
a transport that support compression. I modified TSocket to support compression but it occasionally
has broken pipe error due to crappy Java zlib support (so that clients has to reconnect to
get around the socket error).  This is a support in transport layer meaning you’ll get compression
support for all or none. 


Cassandra server doesn’t seem to support compression either and we are doing that for memory
cache by plugging memcached into Cassandra. Still testing…




From: Ran Tavory [] 
Sent: Wednesday, March 31, 2010 11:37 PM
Subject: compression


What sort of compression (if any) is performed by cassandra?

Does the thrift client compress anything before sending to the server to preserve bandwidth?

Does the server compress the values in the columns to preserve disk or memory?


... I assume compaction, performed on the server side, is different than compression... however,
does compaction include any compression features as well?



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