On 04-10-2011 14:24, Gautier Begin wrote:
I'm planning to use XYMON with a big amount of clients: 1000 and then 4000.
Is it possible ?
Are there some tipps and limitations to know ?
I have about 6000 clients on one installation in Copenhagen - so yes, it is possible.
The only real problem I've seen is the amount of disk I/O done for all the RRD (graph files) updates. Xymon has some built-in caching of updates to reduce the actual amount of disk I/O needed, but even then it can put a rather large load on your I/O system.
My current solution is to use SSD disks for the RRD files - even the smallest SSD disk can easily handle the amount of data you have from 4000 clients.
Alternatively, setup a 10 GB RAM disk for the RRD files, then run rsync regularly to copy them over to permanent storage.
Regards,
Henrik