cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Ashok Ghosh <>
Subject Re: Row cache for writes
Date Mon, 31 Mar 2014 18:56:03 GMT
On Mar 31, 2014 12:38 PM, "Wayne Schroeder" <>

> I found a lot of documentation about the read path for key and row caches,
> but I haven't found anything in regard to the write path.  My app has the
> need to record a large quantity of very short lived temporal data that will
> expire within seconds and only have a small percentage of the rows accessed
> before they expire.  Ideally, and I have done the math, I would like the
> data to never hit disk and just stay in memory once written until it
> expires.  How might I accomplish this?  I am not concerned about data
> consistency at all on this so if I could even avoid the commit log, that
> would be even better.
> My main concern is that I don't see any evidence that writes end up in the
> cache--that it takes at least one read to get it into the cache.  I also
> realize that, assuming I don't cause SSTable writes due to sheer quantity,
> that the data would be in memory anyway.
> Has anyone done anything similar to this that could provide direction?
> Wayne

View raw message