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From kevin <kevincastigli...@gmail.com>
Subject Re: reads are slow
Date Tue, 23 Feb 2010 17:44:20 GMT
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 <jbellis@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 <kevincastiglione@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!
> >
>

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