Created https://issues.apache.org/jira/browse/CASSANDRA-14229
On Mon, Feb 12, 2018 at 12:10 AM, Mateusz Korniak < mateusz-li...@ant.gliwice.pl> wrote: > On Saturday 10 of February 2018 23:09:40 Dan Kinder wrote: > > We're optimizing Cassandra right now for fairly random reads on a large > > dataset. In this dataset, the values are much larger than the keys. I was > > wondering, is it possible to have Cassandra write the *index* files > > (*-Index.db) to one drive (SSD), but write the *data* files (*-Data.db) > to > > another (HDD)? This would be an overall win for us since it's > > cost-prohibitive to store the data itself all on SSD, but we hit the > limits > > if we just use HDD; effectively we would need to buy double, since we are > > doing 2 random reads (index + data). > > Considered putting cassandra data on lvmcache? > We are using this on small (3x2TB compressed data, 128/256MB cache) > clusters > since reaching I/O limits of 2xHDD in RAID10. > > > -- > Mateusz Korniak > "(...) mam brata - poważny, domator, liczykrupa, hipokryta, pobożniś, > krótko mówiąc - podpora społeczeństwa." > Nikos Kazantzakis - "Grek Zorba" > > -- Dan Kinder Principal Software Engineer Turnitin – www.turnitin.com dkin...@turnitin.com
