Brandon, I wasn't aware of any limitation of IO per LUN on HP-UX. Can you provide more details? Thanks, Alex On 6/18/07, Allen, Brandon <Brandon.Allen@xxxxxxxxxxx> wrote:
I'm not sure about the Metalun term, but I believe some operating systems (e.g. HPUX) have internal restrictions on the I/O throughput per LUN, so you might just want to double check to see if your OS (or any other component in the I/O stack) implements this type of limitation, in which case it would be a good idea to present multiple, smaller LUNs to the OS rather than one big LUN. The best way to know for sure is to test - use dd or something similar to see what is the max IOPS you can get on a single LUN vs. two LUNs on the same disk array. Regards, Brandon ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of steve montgomerie should I look at one big RAID 10 set or a couple of smaller ones Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it.
-- Best regards, Alex Gorbachev, Oracle DBA Brewer, The Pythian Group http://www.pythian.com/blogs/author/alex http://blog.oracloid.com -- http://www.freelists.org/webpage/oracle-l