[Xymon] Looking to monitor ~20,000 hosts.

[Henrik Størner]

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Den 15-05-2014 16:26, Weber, Matt skrev:
> Hi all,
> 
> We are attempting to setup Xymon at our organization, where it
> would be monitoring approximately 20,000 hosts with the Xymon
> client in central mode (pulldata).  Just wondering if anyone has
> Xymon monitoring anywhere close to that number of machines? We are
> looking for ideas on what hardware specs would be required for the
> machine running the server side of the Xymon software, or other
> suggestions on how to setup the environment.  Is there a way to
> load balance multiple Xymon servers?

I wasn't auite up to that number of hosts when I had a large
installation - only about 7000 hosts. But I expect that Your main
bottlenecks will be

a) Disk I/O for the RRD files. Use SSD disks for those.

b) TCP sockets. All of your client messages end up being converted
into status-messages, and sent back to xymond via a normal TCP
connection, so you will be using lots of sockets on the Xymon server.
Enabling the "backfeed" feature will fix that for you.


As for hardware specs, I think any "decent" server will work fine.
Dual- or quad-core, and for memory a rough estimate is ~200 kB per
host you monitor. So 4 GB for Xymon, and hence a 64-bit system.


I am curious to hear how it works out for you.


Regards,
Henrik

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