Gordan Bobic wrote:
To pick the optimum RAID block size, look at the disks. What is the
multi-sector transfer size they can handle? I have not seen any disks
to date that have this figure at anything other than 16, and
16sectors * 512 bytes/sector = 8KB.
So set the RAID block size to 8KB.
Is this "chunk size" ? Or would chunk size be #disks*8KB ?
This is also why quite frequently a cheap box made of COTS components
can complete blow away a similar enterprise grade box with 10-100x
the price tag.
In fairness, those enterprise boxes typically have dual redundant
controllers with mirrored cache, and other failure-resistant goodies you
can't really do with COTS hardware. ;)
--
Christopher Smith
UNIX Team Leader
Nighthawk Radiology Services
Limmatquai 4, 6th Floor
8001 Zurich, Switzerland
http://www.nighthawkrad.net
Sydney Fax: +61 2 8211 2333
Zurich Fax: +41 43 497 3301
USA Toll free: 866 241 6635
Email: csmith@xxxxxxxxxxxxxxxx
IP Extension: 8163
Sydney Phone: +61 2 8211 2363
Sydney Mobile: +61 4 0739 7563
Zurich Phone: +41 44 267 3363
Zurich Mobile: +41 79 550 2715
All phones forwarded to my current location, however, please consider
the local time in Zurich before calling from abroad.
CONFIDENTIALITY NOTICE: This email, including any attachments,
contains information from NightHawk Radiology Services, which may be
confidential or privileged. The information is intended to be for the
use of the individual or entity named above. If you are not the intended
recipient, be aware that any disclosure, copying, distribution or use of
the contents of this information is prohibited. If you have received
this email in error, please notify NightHawk Radiology Services
immediately by forwarding message to postmaster@xxxxxxxxxxxxxxxx and
destroy all electronic and hard copies of the communication, including
attachments.
--
Linux-cluster mailing list
Linux-cluster@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/linux-cluster
