Re: [K12OSN] Slow Performance

[Steve Wright <paua quicksilver net nz>]

On Thu, 2003-05-01 at 02:47, Mella wrote:
> 
> So, users system files or users documents in /home need speed?

not speed.  They need a type of disk technology that will handle large
numbers of very quick reads and writes.  IDE will not do this once you
get past 20 or so users, and disk I/O (IDE) avalanches heavily.  SCSI is
far more robust.  If you will be expanding this system any further, then
buy a hardware RAID controller.  2 drives max per SCSI channel.


> My first planned conf was mirrored 73GB SCSI for system + 120GB mirrored
> IDE for user files and e-mail.
> Now I think, It is better put 3x73GB SCSI RAID5 for system and user
> files an make extra server for e-mail with 2x120GB IDE RAID1 for IMAP
> connection.

Yes.  or mirror two of the drives on one SCSI channel for '/' and put
/home on the other SCSI drive.

If you use a hardware raid controller, raid5 the whole lot and mount as
'/'

> Is it correct or users e-mail connection traffic will be also higher
> than IDE can bear?
> USer's mailboxes in outlook can exceed 500MB, incoming e-mail traffic is
> low but trough IMAP they want access his mailboxes tightly :( 

depends on which IMAP server you will use.  uwIMAP can be slow.  Cyrus
is faster.


enjoy!  New Servers are fun.

/steve