[CentOS] Re: Native Command Queueing
boisvert.guy at videotron.ca
Thu Jul 24 19:56:22 UTC 2008
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?
> 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.
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.
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