[horde] Bottleneck ? CPU or HDisk IO or RAM

[Linux Advocate]

good questions rob, thanx for making things clear... my answers below...



----- Original Message ----
> From: Rob MacGregor <rob.macgregor at gmail.com>
> Subject: Re: [horde] Bottleneck ? CPU or HDisk IO or RAM
> 
> The answer to that will depend on a mountain of things, not least:
> 
> 1) How many *concurrent* users?

say 1000? or about 70% at any one time.

> 2) What IMAP server?

dovecot


> 3) What configuration of SATA drives?  A single 1 TB drive will be
> slower to read than a pair of 1 TB in a RAID0, which will be slower
> than 4 half TB drives in a RAID10.  Good quality (ie expensive) SATA
> RAID will be faster than cheap hardware RAID, and software RAID may be
> faster than cheap hardware RAID.


say 6 x 750 GB Sata disks


> 4) What else is the host doing?

just dedicated for horde alone.


Regards,
Marco