> What about SSTable index, Not sure what you are referring to there. Each row has a in a SStable has a bloom filter and may have an index of columns. This is not cached.
See http://thelastpickle.com/2011/07/04/Cassandra-Query-Plans/ or http://www.slideshare.net/aaronmorton/cassandra-sf-2012-technical-deep-dive-query-performance > and Metadata? This is the meta data we hold in memory for every open sstable https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/io/sstable/SSTableMetadata.java Cheers ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 16/08/2012, at 7:34 PM, Maciej Miklas <mac.mik...@gmail.com> wrote: > Hi all, > > bloom filter for row keys is always in RAM. What about SSTable index, and > Metadata? > > Is it cached by Cassandra, or it relays on memory mapped files? > > > Thanks, > Maciej
