Re: [Condor-users] machine for central-manager

[James Osborne <OsborneJA1@xxxxxxxxxxxxx>]

Dear Santanu

We have run our central managers on ESXi (3.5, soon
moving to 4.0 or vSphere) for over 18 months now managing a pool of Windows
XP machines spread across our campus providing access to almost 6000 cores.
 It runs on a fraction of 1 core of an 8 core ESX box and has 2GB
of RAM allocated to it.  The ESXi box is an 8 core system containing
two Intel E5472 processors running at 3.0GHz with a total of 32GB of RAM.
 The ESXi box is connected to a resilient NFS backing store hosting
the virtual machine files. 

Over the last 6 months the series 7 central manager
has maxed out at 15% of 1 core and runs at an average of 7%, maximum memory
of 80% of 2GB and runs at an average of 38%, maximum network IO of 101
Kbps and an average of 35 Kbps.  We have also virtualized submit machines
as well, so an ESX box like ours with a good internal RAID would be more
than sufficient as a head node providing services around a 400-core cluster
using Condor.

You should probably talk to your local HPC people
before going ahead with any development and seek their advice directly

Best regards

James

> 
> Dear all,
> 
> How powerful a machine (CPU-core, memory etc.) should be to run condor
> central-manager for a ~400-core cluster? I'm interested in vitalization,
> so I wanna get a rough idea about the hardware we should go for to
> accommodate all the services/virtual machines to run nicely.
> 
> Also, is there any recommendation on vitalization platform as far
as 
> condor is concerned? Is VMware ESXi a good choice??
> 
> Thanks in advance for any help.
> 
> Cheers,
> Santanu
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