[CentOS] Poor RAID performance new Xeon server?
John R Pierce
pierce at hogranch.com
Sun Jan 11 18:39:54 UTC 2009
Stewart Williams wrote:
> John R Pierce wrote:
>> Stewart Williams wrote:
>>> The block I/O is the thing that concerns me as mostly I am serving a
>>> 650MB file via samba to 5 clients and I think this is where I need the
>> is this a sequential or random access application thats using this
>> file? is it read only/mostly, or is it random update?
> I'm not sure, how can I find this out?
well, what is the nature of the application thats using this file?
do you really mean just a single 650MB (sub 1GB) file?
is this something like a quickbooks file? (thats kind of what it sounds
like from your other answers).
given what you have now, and what information we've been given, I would
A) disable BIOS raid, configuring it for JBOD w/ ACHI enabled
B) mdadm mirror disks 0 and 1, and put the OS on that
C) mdadm mirror disks 2 and 3, and put your shared SMB filesystem on
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