backport of pre cache load

[Artie Copeland <ye...@gmail.com>]

would it be possible to backport the 0.7 feature, the ability to safe and
preload row caches after a restart.  i think that is a very nice and
important feature that would help users with very large caches, that take a
long time to get the proper hot set.  for example we can get pretty good
cache row cache hits if we run the servers for a month or more as the data
tends to settle down.

-- 
http://yeslinux.org
http://yestech.org

Re: backport of pre cache load

[Artie Copeland <ye...@gmail.com>]

No we aren't caching 100%, we cache over 20 - 30 million which only starts
to get a high hit rate overtime so to have a useful cache can take over a
week of running.  We would love to store the complete CF in memory but know
know of a server that can hold that much data in memory while still being
commodity.  Our data set is currently over 100GB.

On Fri, Aug 6, 2010 at 5:54 PM, Jonathan Ellis <jb...@gmail.com> wrote:

> are you caching 100% of the CF?
>
> if not this is not super useful.
>
> On Fri, Aug 6, 2010 at 7:10 PM, Artie Copeland <ye...@gmail.com>
> wrote:
> > would it be possible to backport the 0.7 feature, the ability to safe and
> > preload row caches after a restart.  i think that is a very nice and
> > important feature that would help users with very large caches, that take
> a
> > long time to get the proper hot set.  for example we can get pretty good
> > cache row cache hits if we run the servers for a month or more as the
> data
> > tends to settle down.
> > --
> > http://yeslinux.org
> > http://yestech.org
> >
>
>
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of Riptano, the source for professional Cassandra support
> http://riptano.com
>



-- 
http://yeslinux.org
http://yestech.org

Re: backport of pre cache load

[Jonathan Ellis <jb...@gmail.com>]

are you caching 100% of the CF?

if not this is not super useful.

On Fri, Aug 6, 2010 at 7:10 PM, Artie Copeland <ye...@gmail.com> wrote:
> would it be possible to backport the 0.7 feature, the ability to safe and
> preload row caches after a restart.  i think that is a very nice and
> important feature that would help users with very large caches, that take a
> long time to get the proper hot set.  for example we can get pretty good
> cache row cache hits if we run the servers for a month or more as the data
> tends to settle down.
> --
> http://yeslinux.org
> http://yestech.org
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com