Re: RMAN restore 11.2.0.2 not honoring symbolic link

From: John Hurley <hurleyjohnb_at_yahoo.com>
Date: Tue, 8 Nov 2011 12:15:16 -0800 (PST)
Message-ID: <49ee4162-7a0d-40ab-8665-135533df288b_at_k26g2000yqd.googlegroups.com>



Joseph:

## More details please.

# We are hp-ux itanium 11.31 OS with Oracle 11.2.0.2. My college tested this on linux/aix boxes as well. we are not using ASM disks, just file system. I have tested some basic senarios when Oracle honors symbolic links or not:

So if you are using a real cooked file system what is the reason for symbolic links to your datafiles/controlfiles etc?

In my environment we use EMC storage and I want to provide a level of separation between the disks that ASM thinks it is using and the emc provided storage. It gets to be a long story but using emc power path you end up with some "weird" dev ( device ) names like /dev/ emcpowerxx . Besides that at points you may want to have snapshots and/or clones etc that you might bring up as the database.

I setup my environment so that I can switch things around easily ... we use /storage/asm_diskgroupname/disk# as a symbolic link into the real emc device names. When I point asm over to a disk I tell it the disk is ( for example ) /storage/dev_dg1/disk3 ... and have that disk3 be the symbolic link over to a real emc device name/disk.

Why exactly are you trying to use symbolic links in your environment?

HPUX is always a little dicey these days in Oracle maintenance and bugs and stuff. Used to be rock solid but those days seem kind of distant now.

If you have a reproducible test case with symbolic links on both HPUX and linux I would get that volleyed over to Oracle support as an SR. Even just a reproducible test case on HPUX I would get that opened up.

Yes I am sure that there are quite a bit of fixes in 11.2.0.3 ( versus 11.2.0.2.? ) ... but not sure how many of them might be relevant to what you think you are running into. Received on Tue Nov 08 2011 - 14:15:16 CST

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