incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From AJ>
Subject Re: Anyone using Facebook's flashcache?
Date Mon, 18 Jul 2011 01:09:15 GMT
On 7/17/2011 12:29 PM, H├ęctor Izquierdo Seliva wrote:
> I've been using flashcache for a while in production. It improves read
> performance and latency was halved by a good chunk, though I don't
> remember the exact numbers.
> Problems: compactions will trash your cache, and so will memtable
> flushes. Right now there's no way to avoid that.
> If you want, I could dig the numbers for a before/after comparison.

Hector, some before/after numbers would be great if you can find them.  

What happens when your cache gets trashed?  Do compactions and flushes 
go slower?



View raw message