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From David Strauss <da...@fourkitchens.com>
Subject Re: Read Performance
Date Wed, 31 Mar 2010 18:32:38 GMT
Or, if faking memcached misses is too high a price to pay, queue some
proportion of the reads to replay asynchronously against Cassandra.

On Wed, 2010-03-31 at 11:04 -0500, Jonathan Ellis wrote:
> Can you redirect some of the reads from memcache to cassandra?  Sounds
> like the cache isn't getting warmed up.
> 
> On Wed, Mar 31, 2010 at 11:01 AM, James Golick <jamesgolick@gmail.com> wrote:
> > I'm testing on the live cluster, but most of the production reads are being
> > served by the cache. It's definitely the right CF.
> >
> > On Wed, Mar 31, 2010 at 8:30 AM, Jonathan Ellis <jbellis@gmail.com> wrote:
> >>
> >> On Wed, Mar 31, 2010 at 12:01 AM, James Golick <jamesgolick@gmail.com>
> >> wrote:
> >> > Okay, so now my row cache hit rate jumps between 1.0, 99.5, 95.6, and
> >> > NaN.
> >> > Seems like that stat is a little broken.
> >>
> >> Sounds like you aren't getting enough requests for the
> >> getRecentHitRate to make sense.  use getHits / getRequests.
> >>
> >> But if you aren't getting enough requests for getRecentHitRate, are
> >> you sure you're tuning the cache on the right CF for your 35ms test?
> >> Are you testing live?  If not, what's your methodology here?
> >>
> >> -Jonathan
> >
> >




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