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Re[2]: Oracle and NAS storage systems

From: <dgoulet_at_vicr.com>
Date: Mon, 15 Jul 2002 09:58:30 -0800
Message-ID: <F001.00498266.20020715095830@fatcity.com>


Jared,

    That is what I believe, but of course the NetApp folks keep telling the powers that be (PTB) that they can handle it & be cheaper in the long run. The EMC folks on the other hand are telling me that it's risky due to the problems you encountered with filers plus the network delay to get the write confirmation needed. Those two could put data files offline at the worst possible time. I think one item that works against EMC is the fact that they are our current DAS storage vendor & the PTB believe they want to keep it that way.

Dick Goulet

____________________Reply Separator____________________
Author: Jared.Still_at_radisys.com
Date:       7/15/2002 9:39 AM

Dick,

I had a recent bad experience with a NetApps Filer.

Due to circumstances beyond my control, I was about to run out of space on our most critical application. ( SAP. I predicted in January that we would run out of space   in the first week of July. It happened on June 28th )

Our SA's made temporary storage available on a NetApp filer.

First problem: Veritas BackupExec doesn't know how to backup files on a filer in some circumstances, my circumstances unfortunately.

Second problem: making a disk to disk backup of the files to another location on the filer seems to have overwhelmed it. The files on the file were suddenly unreadable and crashed.

Due to another, unrelated set of unfortunate circumstances ( NT failed to started one monitoring service, the other died ) I didn't know about this until the next morning, and manufacturing suffered 2 hours of downtime.

The filer at this time seemed to be OK. Restart the database, recover the datafiles ( forgot about 'ALTER TABLESPACE END BACKUP'. D'oh! ) and start the database backup.

The files are now on the SAN where they belong.

Spend the extra $$ and put in a SAN.

Faster, more reliable, more managable.

Jared

dgoulet_at_vicr.com
Sent by: root_at_fatcity.com
07/15/2002 07:43 AM
Please respond to ORACLE-L  

        To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
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        Subject:        Oracle and NAS storage systems


Folks,

    I've been asked to validate/invalidate a contention made by two storage
vendors.

    NetAppliance has stated that you can use a netapp filer with Oracle for
datafiles, although their configuration looks more like a DAS(direct attached
storage) configuration using 10baseT cables vs. SCSI cables. Of course their
real claim to fame here is Oracle's endorsement.

    EMC on the other hand has stated that using a NAS, in the traditional mode,
for Oracle datafiles is at best risky. And although their product can support
it, they do not recommend doing so for several of the reasons that I've held out
are pertinent.

    Therefore, is there anyone out their using a NAS to store datafiles? If so,
what does the configuration (server to NAS) look like?

Dick Goulet
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