Hi Ben:

On Wed, Apr 23, 2008 at 4:01 PM, Ben Rockwood <[EMAIL PROTECTED]> wrote:

>  The question I have for the list is... has anyone else run into this
>  bottleneck?  If so, how did you solve the issue?  I know several people
>  have multiple gmetad's out there, perhaps unnecessarily.  CPU usage and
>  disk consumption are low, its just doing a lot of IO.  My data/ dir is
>  only 27MB.

I think with one gmetad, when you start monitoring hundreds to
thousands of nodes, you'll run into the RRDtool I/O issue (of course
depends on if you have extra "custom" metrics).  It has been discussed
numerous times (check archives for more details) and the most common
solution is basically what you did -- put the rrd directory in tmpfs.

I heard that the next version of RRDtool (1.3) is supposed to have
some scalability and I/O improvements.  It would be nice if someone
who has tested the beta on a largish cluster could share their
experiences.

Cheers,

Bernard

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