i dont think so /dev/sdc1 is the commitlog drive, and /dev/sdd1 is the data directory.
http://pastie.org/838943 On Tue, Feb 23, 2010 at 9:35 AM, Jonathan Ellis <jbel...@gmail.com> wrote: > are you i/o bound? > http://spyced.blogspot.com/2010/01/linux-performance-basics.html > > On Tue, Feb 23, 2010 at 11:33 AM, kevin <kevincastigli...@gmail.com> > wrote: > > to load 100 columns of a super column it takes over a second. how to > improve > > this performance. > > > > > > i am using cassandra 0.5 version. > > > > output of nodeprobe info > > 29814395632524962303611017038378268216 > > Load : 9.18 GB > > Generation No : 1266945238 > > Uptime (seconds) : 638131 > > Heap Memory (MB) : 47.55 / 10237.94 > > > > the full config file is here > > http://pastie.org/838916 > > > > I have given 10GB RAM in cassandra.in.sh. > > -Xmx10G \ > > i have increased KeysCachedFraction to 0.04. i have two different drives > for > > commitlog and data directoy. > > i have about 3 million rows. > > what can i do to improve read speed? > > thanks a lot! > > >
