rrdtool performance tuning

[Edward Buck]

Dmitry Morozovsky wrote:

> any hints to tune rrdtool with ~30k rrd files (approx 2k target devices)?
> 
> machine is mostly IO-bound, showing 100% disk load with 8 or sometimes even 3 
> mB/s, 300-400 tps (it's 2 SATA300 disks in gmirror)

What are you using as a snmp poller?  Some pollers are not very 
efficient in the way that they collect and write information to rrd 
files.  Also, I've seen users setup RRD files with redundant 
information, which means you may be writing the same data multiple times.

If you know that the collection and writing of data is about as 
efficient as possible, then my advice would be to get faster disks and 
use hardware RAID.

Ed

> 
> Thanks in advance.
> 
> Sincerely,
> D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
> [ FreeBSD committer:                                 marck at FreeBSD.org ]
> ------------------------------------------------------------------------
> *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
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