Re: Is Async IO being Used or NOT ?
- From: Deepak Sharma <sharmakdeep_oracle@xxxxxxxxx>
- To: VIVEK_SHARMA@xxxxxxxxxxx, ORACLE-L <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 6 Nov 2008 15:12:01 -0800 (PST)
One way to see if ODM is installed or not is to verify /dev/odm (it's a
directory):
$ ls -l /dev/odm
total 0
-rw-rw-rw- 1 root system 0 Nov 06 17:08 cluster
-rw-rw-rw- 1 root system 0 Nov 06 17:08 ctl
-rw-rw-rw- 1 root system 0 Nov 06 17:08 ktrace
-rw-rw-rw- 1 root system 0 Nov 06 17:08 stats
As I understand, ODM was developed by Veritas and Oracle together, but as for
the setup it probably needs to go through Veritas.
-Deepak
________________________________
From: VIVEK_SHARMA <VIVEK_SHARMA@xxxxxxxxxxx>
To: ORACLE-L <oracle-l@xxxxxxxxxxxxx>
Sent: Thursday, November 6, 2008 1:33:13 AM
Subject: RE: Is Async IO being Used or NOT ?
Some basic Qs on ODM
LSC, Folksbelow
1. How is it possible to check if ODM(Oracle Disk Manager) is setup or
NOT on the machine?
2. Does ODM need a Separate Setup on HP-VXFS? .. Is it separated
Licensed? If so by who - Oracle Corp or HP?
Am assuming that HP-UX
uses VXFS by Default.
Cheers & Thanks V
much
________________________________
From:LS Cheng
[mailto:exriscer@xxxxxxxxx]
aio is only posible with
raw devices in hp-ux unless you use odm on vxfs
Thanks
--
LSC
On Wed, Nov 5, 2008 at 8:35 AM, VIVEK_SHARMA <VIVEK_SHARMA@xxxxxxxxxxx> wrote:
Folks
Need to find out if Async IO is setup &
working or NOT in our Performance Benchmark Setup.
Qs 1 - What HP-UX
Command gives the existing filesystemio_options settings for the mounted
filesystem ?
NOTE - Init.ora parameter disk_async_io=true
(default)
Qs 2 – For Async IO to work, is there a
dependency or NOT on the existence of the file "/dev/async" ? … This file does
NOT exist Currently
… Is the presence of this file merely to suppress the below Error Message
in Oracle Trace files.
Oracle Trace
Files currently contain the Message:-
Error - File '/dev/async' not present :
errno=2
Related
Link -
http://sap.ittoolbox.com/groups/technical-functional/sap-basis/ecc-upgrade-phase-tabimupg-error-1790565
Existing Configuration:-
Oracle 10.2.0.1
System
name: HP-UX
Node
name: SPEHPPA1
Release: B.11.11
Version:
U
Machine:
9000/800
Will provide any info needed …. Cheers
& Thanks V much
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