Re: Huge Cricket Installations

On Tue, 2006-11-21 at 20:27 -0500, Ed Ravin wrote: 
> * Use rsync for the file copies when playing games with config.db or
> moving RRD files back and forth, since it guarantees that there won't
> be a partial or stale version of the file present during the copy.
> 

That's essentially what we do. But we've split the collector and the
grapher, and the rsync command sending the rrds back from the collectors
to the grapher is the last thing that's done in the collection cronjob.

We have a simple script run at a collector that synchronises the config
files (again using rsync) back to the grapher host and uses ssh to
instruct the grapher host to recompile. Shared keys makes life easier.

Seems to work pretty well, and we can't see how we'd need big iron to
scale.

Currently using 300 old 386's with 128K of memory to poll 3 Million
datapoints in 2.5 seconds.


jamie
heh, just kidding about that last bit.





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