Experience with ODM needed

[Helmut Kutzberger]

Hi out there,

our Application guys insist on having advanced filesystem performance by using ODM. At the moment we are running pretty standard LVM. Does anybody of you have experiences in using ODM, what performance gain is to expect, is it worth the additional cost/effort and so on. Are there any pitfalls. Every comment is welcome.

TIA Helmut

[Duncan Edmonstone · Accepted solution]

Helmut,

Although ostensibly about the Serviceguard Storage Management Suite (which includes ODM), the following WP compared performance of VxVM/ODM with LVM:

http://h71028.www7.hp.com/ERC/downloads/4AA1-2527ENW.pdf

The table at the top of p12 shows some pretty stunning figures, although I'm not convinced there is sufficient details in the tests to use these as any sort of benchmark, you can certainly be sure of obtaining 'near raw' performance, and also get the advantage of doing async IO.

HTH

Duncan

[chris huys_4]

Hi Helmut,

ODM, oracle disk manager, is pretty uber, especially with large filesystems, which contains a few very large oracle database files.

The performance should at least be equal to raw volume databases of the same size.

odm is part of the storage management suite for oracle.

sms 1.01 release notes
http://docs.hp.com/en/T2771-90030/T2771-90030_R3.pdf

sms 2.0 release notes
http://docs.hp.com/en/T2771-90036/T2771-90036_R4a.pdf

Greetz,
Chris

[noldi]

Hi Helmut,

we had a project where ODM was part of the picture and the customer has licensed it but the Oracle guys did not want to turn it on since it also requires special treatment on the Oracle side (patches, etc.).

Best Regards,

Arnold

[Helmut Kutzberger]

Thanks for your answers, but except noldis is only less personal experience i assume. Noldi would you be so kind to explain the drawbacks to not implement ODM although you´ve already licensed ($$$) it?

[Helmut Kutzberger]

!