cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From AJ ...@dude.podzone.net>
Subject Re: Anyone using Facebook's flashcache?
Date Mon, 18 Jul 2011 19:36:37 GMT
On 7/18/2011 1:20 PM, H├ęctor Izquierdo Seliva wrote:
>> If using the version that has both rt and wt caches, is it just the wt
>> cache that's polluted for compactions/flushes?  If not, why does the rt
>> cache also get polluted?
>>
> As I said, all reads go through flashcache, so if you read three 10 GB
> sstables for a compaction you will get those 30 GB into the cache.
>

Of course.  I wasn't thinking clearly.

So, back to a previous point you brought up, I will have heavy reads and 
even heavier writes.  How would you rate the benefits of flashcache in 
such a scenario?  Is it still an overall performance boost worth the 
expense?

Thanks,
aj

Mime
View raw message