Is there anyway to enable NCQ on CentOS 4.6? I guess anouther question is on a somewhat high activity mail server with a single SATA2 drive will it do any good? Matt
on 7-24-2008 6:51 AM Matt spake the following:> Is there anyway to enable NCQ on CentOS 4.6? I guess anouther > question is on a somewhat high activity mail server with a single > SATA2 drive will it do any good? > > MattI doubt it will make a BIG difference, but you might be looking for trouble running a highly active server of any kind on a single spindle. -- MailScanner is like deodorant... You hope everybody uses it, and you notice quickly if they don't!!!! -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 258 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20080724/09f11a82/attachment-0001.sig>
>> Is there anyway to enable NCQ on CentOS 4.6? I guess anouther >> question is on a somewhat high activity mail server with a single >> SATA2 drive will it do any good? >> >> Matt > > I doubt it will make a BIG difference, but you might be looking for trouble > running a highly active server of any kind on a single spindle.Some decisions made in past are hard to undo down the road. Would like to move to CentOS 64 5.x with RAID but moving everything too a new box is a very severe pain. I have to move it to new IP space shortly and hate the idea of that. Matt
Matt wrote:> Is there anyway to enable NCQ on CentOS 4.6? I guess anouther > question is on a somewhat high activity mail server with a single > SATA2 drive will it do any good? >most of the tests I've seen, the overhead of SATA NCQ exceeds any gains and it ends up slower :-/
Scott Silva wrote:> on 7-24-2008 6:51 AM Matt spake the following: >> Is there anyway to enable NCQ on CentOS 4.6? I guess anouther >> question is on a somewhat high activity mail server with a single >> SATA2 drive will it do any good? >> >> Matt > I doubt it will make a BIG difference, but you might be looking for > trouble running a highly active server of any kind on a single spindle. >I have a Communigate mail server that was running on a single WD 200 Gigs IDE (7200 RPM). Communigate uses separate mbox files for storage, very easy for backup / restore. I was monitoring it with SAR and there was very high level of IOWait, meaning the drive was having a hard time. Context: =======35 Users Running Outlook with Communigate MAPI Plugin 80 Gigs dataset (Total) Public folder with about 50 Gigs of stuff We replaced the server with a Tyan Transport TA-26. We put an Adaptec 3405 (4 ports Unified SATA/SAS adapter) and 4 Seagate 15K SAS 73 Gigs drives (RAID 10). No more iowaits even if now there is 50 users. I don't know about your context but running on a single drive is dangerous for data loss anyway. Hope this helped! Guy Boisvert, ing. IngTegration inc.