RE: High Availability Options
- From: D'Hooge Freek <Freek.DHooge@xxxxxxxxx>
- To: "Paul.McManus@xxxxxxxxxxxx" <Paul.McManus@xxxxxxxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 28 Oct 2010 16:23:45 +0200
Paul,
If you use linux multipathing (which is often the case), this will also ensure
persistent device naming (certainly when you provide an alias).
I like to use udev to then create the devices for asm (based upon the alias
name given in multipath) in a separate directory to avoid picking a device that
was not ment to be used for asm.
(and to set the ownership / privileges correctly).
Regards,
Freek D'Hooge
Uptime
Oracle Database Administrator
email: freek.dhooge@xxxxxxxxx
tel +32(0)3 451 23 82
http://www.uptime.be
disclaimer: www.uptime.be/disclaimer
________________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Paul McManus
Sent: donderdag 28 oktober 2010 16:01
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: High Availability Options
> +1 IMHO: both udev or ASM Lib just useless. Why we should introduse
> any additional layers when we can avoid those.
> Keep it simple. Use devices directly (ASM will read headers for you,
> just set the discovery string right) + rc.local will fix privileges
> esely.
>
> Just my .2$,
> Yurt
I thought UDEV and/or ASMLIB were recommended to ensure persistent device
naming.
I have certainly seen RAC environments fall over when new LUNS were presented
that caused the device names to switch and so messed up a rawdevices
configuration which meant voting disks and OCR files were not where they were
supposed to be.
PMcM
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