Tom Hancock wrote:
> We are strongly considering deploying a Postfix/Dbmail
email solution.
> We will have 4 servers that will be running postfix,
dbmail, and other
> ISP related applications. They will use a backend
server for the
> database storage. The backend server will be running
MySQL for Dbmail
> storage and NFS for some other applications. I do not
envision NFS
> being heavily utilized. We currently have
approximately 2500 email
> accounts that get spam/virus filtered through Postini.
>
> What hardware requirements would you recommend for the
backend MySQL/NFS
> server? In particular I am interested in CPU and RAM
requirements.
Well, never skimp on the RAM because it's dirt cheap. If you
have a
budget, get more ram up to the point when it is economically
feasible
after you've selected the rest of the hardware.
For the database, I'd use some 2-way dual core solution,
Opterons really
shine in this area (and there are price cuts coming in one
month for the
275 model).
Front end machines could be some 1-way dual core with dual
gigabit
NIC's. Since the dual cores don't really cost any more than
a reasonably
fast single core, I'd go for them in any server
installation.
DBMail spawns like apache prefork so it will take full
advantage of
extra cpu's in system without expensive context switching.
For storage on the db server, you can choose the expensive
way and take
some biggie scsi disks and put them on reasonable raid (not
raid5) and
have a second raid-0 for transaction logs etc.
If you want to go into more economic way, take a look at
western digital
server edition sata hd's, they're qualified for 24/7
operation. For the
fast raid0 partition, take 2 or more from the new 10krpm
150G series.
They do fly.
Have another el cheap db server doing just replication for
backup purposes.
--
br,
Tommi
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