[hobbit] Agentless clients

[Buchan Milne]

On Thursday 05 January 2006 18:21, Charles Jones wrote:

> Lets say you have 1000 hosts. Lets then just for fun pretend that it
> will only take 1 second to log into the remote hosts, run several tests,
> and receive the result (it would actually take a bit longer than that).
>
> 1000 seconds (hosts) / 60 (minutes) = 16.666 minutes to poll those hosts!
>
> So then you can say oh well just have 2-3 hobbit servers doing the
> polling then.  Now you have 3 hobbit servers to deail with, monitoring
> them, upgrading them, etc.
>
> Now lets look at a *real world* example of how long it takes to ssh in
> and execute a command:
>
> [hobbit at hobbit ~]$ time ssh myhost.net df -h
> Filesystem             size   used  avail capacity  Mounted on
> /dev/dsk/c5t0d0s0       30G    10G    20G    35%    /
> /devices                 0K     0K     0K     0%    /devices
> ctfs                     0K     0K     0K     0%    /system/contract
> proc                     0K     0K     0K     0%    /proc
> mnttab                   0K     0K     0K     0%    /etc/mnttab
> swap                   6.6G  1000K   6.6G     1%    /etc/svc/volatile
> objfs                    0K     0K     0K     0%    /system/object
> fd                       0K     0K     0K     0%    /dev/fd
> swap                   6.6G    16K   6.6G     1%    /tmp
> swap                   6.6G    32K   6.6G     1%    /var/run
> /dev/md/dsk/d0         639G   116G   523G    19%    /raid
> /dev/md/dsk/d1         807G   504G   304G    63%    /raid2
>
> *real    0m1.912s*
> user    0m0.022s
> sys     0m0.008s
>
> Almost 2 seconds there....and just for one command. 

I keep wondering how long the equivalent snmp query takes ... or in fact 
gathering all the data asynchronously via snmp ...

Regards,
Buchan

-- 
Buchan Milne
ISP Systems Specialist
B.Eng,RHCE(803004789010797),LPIC-2(LPI000074592)
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