[Xymon] Most number of hosts

[Nico]

Hi Michael

Here we are monitoring > 10 000 hosts over 18 hobbit clusters (1 cluster per datacenter)  but we have one cluster with > 3600 hosts:

Hardware is 

HP DL380 G7 
2 x Xeon X5650
RAID 1 for OS
RAID 5 for data with 4 SSD  hard drives (165Gb) for xymon data.
8 Gb RAM.

xymongen:

Statistics:
 Hosts                      :  3692
 Pages                      :   497
 Status messages            : 46298
 - Red                      :   318 ( 0.69 %)
 - Red (non-propagating)    :     0 ( 0.00 %)
 - Yellow                   :   347 ( 0.75 %)
 - Yellow (non-propagating) :     0 ( 0.00 %)
 - Clear                    :   902 ( 1.95 %)
 - Green                    : 43537 (94.04 %)
 - Purple                   :    82 ( 0.18 %)
 - Blue                     :  1112 ( 2.40 %)


xymonnet:

Statistics:
 Hosts total           :     3660
 Hosts with no tests   :        5
 Total test count      :     9645
 Status messages       :    10034
 Alert status msgs     :        0
 Transmissions         :      332

DNS statistics:
 # hostnames resolved  :     1763
 # succesful           :      628
 # failed              :        6
 # calls to dnsresolve :     1727

TCP test statistics:
 # TCP tests total     :     5993
 # HTTP tests          :     2222
 # Simple TCP tests    :     3771
 # Connection attempts :     5993
 # bytes written       :   376789
 # bytes read          : 25004690

[root at xxxxxxxx:/opt/xymon/server/etc/hosts.d/customer ] 21 grep -c proc /proc/cpuinfo 
24

load average: 2.03, 1.97, 2.00

CPU %idle average: 90% !!!

you can have many hosts; but i think the most important things is the number of check per hosts and the external scripts running on your xymon server. (oracle check; backup check, reporting, etc) which increases the load.

Having SSD is a good option because in the past, the main load was I/O wait.


Cheers
Nico


Le 22 mai 2012 à 20:11, <greg.shea at emc.com> a écrit :

> Hi Michael,
> 
> At one point, I had 6115 hosts running from 1 physical Xymon server.  Some tests, specifically WebLogic, I run from a 
> separate VM so if the java process hangs, it doesn't affect the main Xymon server.
> Physical HW
> Dell PE 2950
>  2 Xeon 5110 CPUs
>  8GB RAM
>  2  146GB, 10K RPM SAS (RAID1 root disk)
>  2  146GB. 15K RPM SAS (apps & data)
>  Red Hat Enterprise Linux AS release 4 (Nahant Update 7)
>  Xymon 4.3.4
> 
> That's all changing now because of the push to virtualize everything, so I used the opportunity to build in some redundancy.
> Currently we have 2750 hosts running in this environment and will be migrating the rest of the old server over before EOY.
> Primary and standby VMs
>  2 Virtual Xeon E7549 CPUs
>  8GB RAM
>  120GB root disk and 200GB apps disk
>  Red Hat Enterprise Linux Server release 5.5 (Tikanga)
>  Xymon 4.3.7
> 
> Primary and standby external test VMs (WebLogic, custom tests)
>  (same as above)
> 
> 
> -----Original Message-----
> From: xymon-bounces at xymon.com [mailto:xymon-bounces at xymon.com] On Behalf Of Michael Beatty
> Sent: Tuesday, May 22, 2012 1:01 PM
> To: xymon at xymon.com
> Subject: [Xymon] Most number of hosts
> 
> Is there any close proximity number available as to how many clients Xymon can handle?  I've seen in the wiki pages that one user is advertising over 10,000 however, that seems to be in a "clustered"
> setting.  I see a few more users suggesting over 2,000.  My concern lies in that my plans stand at some where in the middle of that, and also, there really is no gauge as to what hardware and network topology those systems are running. 
> 
> My environment will be in the ball park of about 5,000 systems and many of them are on satellite bands with some latency concerns, pings tests come back at around 3 seconds.
> 
> I'm hoping to get some confidence that going into this project, I'm not going to be hit with a realization that Xymon simply cannot handle this type of environment.  Its a lot of research and development that I would be flushing down the drain. I do have experience with my previous organization where we monitored about 1500 clients under the Hobbit project.... so I know the capabilities... I just don't know what the boundaries are.
> 
> 
> --
> Michael Beatty
> Sherwin-Williams
> IT Analyst/Developer
> michael.beatty at sherwin.com
> 216-515-7374
> 
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