performance between ioDrive Duo and ioDrive

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terrytse Posted: 03-28-2010 9:15 PM

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hi All,

i have test-run Oracle 10g database on ioDrive Duo and ioDrive, but find that there is not much difference in the I/O performance. 

for both, i got around 700MB/s, why?

thx.

b.r.

terrytse

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Nunley replied on 04-28-2010 7:32 PM

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terrytse,

Have you tried fio-pci-check?  It will tell you if the PCi slot the card is in has negotiated enough bandwidth for full performance.  If you PCI bus is over-subscribed, or the slot doesn't support Duo, it will tell you.  ioDrive Duo requires a PCIe x8 Gen1 slot, or a PCIe x4 Gen2 slot.  Some PCIe slots say they are x16 but are only wired for something less.  fio-pci-check will give you a good look.

-Shawn

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mshabou replied on 06-29-2010 2:54 AM

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Hi,

try to use parallel query (http://www.orafaq.com/wiki/Parallel_Query_FAQ), Oracle is not multi-threaded, a query use only one Core

Malek,