Sorry if this post gets a bit long, I've read thru the man pages and the archives and have failed to reach understanding and need some help.
I have over 4300 Hobbit 4.2.0+all-patches clients currently reporting to one server running Xymon 4.3.0-0.beta2. This server is also used for other workloads, which normally do not produce much of a load but can at times.
We are adding more clients to this configuration at rate of about 400/week for a final total of about 7200 clients.
As of this week it seems that my Xymon server is unable to keep up with the load and I suspect this is due to several reasons: the large number of clients, file system type (ext3) used for the data/.. directories (, the problem is.
I am trying to determine my best course to be able to handle the 7200+ clients ...
Some options I've considered:
A) simply split the clients over 2 or more independent Xymon servers
a. easiest to configure
b. lose 'single web page' overview
c. lose combined statistics/reporting
B) Split clients over multiple servers for data gathering/storage and (how?) use one server to display a bb2.html page which combines all non green from all 'data-gathering' servers
a. Is this even possible?
C) Some other method/configuration? Anyone on the list running this many clients?
a. How did you set up your environment?
b. What size/performance/type of system are you using for your Xymon server?
Some of my current symptoms:
The 'top' command on the server is indicating high I/O load (at times %iowait > 60%).
The 'procs' column warns/alerts about missing processes; closer examination shows that the client data received has been truncated, usually somewhere in the 'ps' outout section.
The bb2.html page sometimes shows many 'purple' clients; the clients in purple change (eg, a client goes purple for a while 5-30+ minutes, then we get another message processed and the client goes green again.
In /var/log/xymon/clientdata.log, I am seeing many (2212 yesterday alone) messages like:
2010-05-27 11:38:09 hobbitd_client: Got message 55294, expected 55277
2010-05-27 12:08:12 Flushed 7 stale messages for 0.0.0.0:0
2010-05-27 12:08:13 Flushed 43 stale messages for 0.0.0.0:0
2010-05-27 12:08:13 hobbitd_client: Got message 81190, expected 81140
2010-05-27 12:38:36 Flushed 16 stale messages for 0.0.0.0:0
2010-05-27 12:38:37 Flushed 43 stale messages for 0.0.0.0:0
2010-05-27 12:38:38 Flushed 26 stale messages for 0.0.0.0:0
2010-05-27 12:38:38 hobbitd_client: Got message 107484, expected 107399
The hobbitd page shows:
Statistics for Hobbit daemon Up since 26-May-2010 14:55:38 (0 days, 22:00:02)
Incoming messages : 16721697
- status : 11146704
- combo : 1122112
Incoming messages/sec : 216 (average last 300 seconds)
The bbtest is taking 225 seconds to complete
PING test completed (4390 hosts) 5005592.360761 203.397989 TIME TOTAL 225.391564
Hoping the group-mind can help me out,
Thanks,
Tom
Thomas Brand
Disclaimer: 1) all opinions are my own, 2) I may be completely wrong, 3) my advice is worth at least as much as what you are paying for it, or your money cheerfully refunded.
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