Hello,
I have the same considerations for an upcoming cyrus murder setup. I
would like to continue to use RHEL on HP ProLiant hardware as most of
our services are running on it and it works perfectly.
While I understand that MUPDATE and the frontends will be idling around
most of the time (I think I will use DL360 with Opteron DC or so) and
I'm just not sure how much memory I should give them, I'm not sure about
the backend hardware.
I'm a bit afraid of large systems, because if I have a server with 2 TB
of storage, but it can't handle enough concurrent connections, then I
won't be able to use the storage available and I have to setup an
additional backend server with a lot of storage left unused. How can I
calculate how much CPU and memory I need for an average user with a
maximum of 100 MB per mailbox and some larger mailboxes like 2 or 5 GB?
Would you prefer a really fat system with 16 GB of RAM, 1 TB storage and
two dual core Opterons or two separate systems with 500 GB storage, 2-4
GB RAM and one dual core Opteron? I would tend to the latter one (two
small systems should be more failsafe than one large, aren't they?). So
for the hardware I'm tending between a small DL360 with two big SCSI
discs or a big DL385 with 6 drive bays.
Regards
Marten
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