I guess what I am getting at is make sure you get it in writing. I agree with your take on NFS file locking, but I have been in situations where support engineer A promised something that support engineer B would not support. If you can point to a Veritas document that states they support the database over NFS, your are in favorable situation.

Regards,

Jon

-----Original Message----- From: Manny Kaiser [mailto:mkaiser@mmcnet.com] Sent: Thursday, October 25, 2001 12:28 AM To: Jon Walton Cc: toasters@mathworks. com Subject: RE: Veritas Netbackup Database

I was under the distinct impression that file locking in NFS in today's operating systems is considerably more reliable then it was years ago. I have never encountered a problem with any application running on an NFS mounted file system. I am under the impression that the quote below is something that was copied out of earlier versions of the manual and never reviewed again.

When using NFS you might suffer a performance penalty if your systems are not correctly configured.

-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com]On Behalf Of Jon Walton Sent: Wednesday, October 24, 2001 11:31 PM To: Jeff Kennedy Cc: toasters@mathworks. com Subject: RE: Veritas Netbackup Database

Now that I look, the 3.4 DataCenter install guide states:

"Because the product uses file locking, VERITAS recommends that you not install NetBackup in an NFS mounted directory. File locking in NFS mounted files systems can be unreliable"

I mentally took this to mean "not supported". Sorry if my previous email was misleading.

Regards,

Jon

-----Original Message----- From: Jeff Kennedy [mailto:jlkennedy@amcc.com] Sent: Wednesday, October 24, 2001 6:18 AM To: Jon Walton Cc: toasters@mathworks. com Subject: Re: Veritas Netbackup Database

OK, I did some checking again. Veritas does officially support putting /usr/openv onto an NFS file system. However, they say that performance does suffer due to the large write streams.

So, if performance is not an issue then it is a very nice solution. Also, db backups do not yet support disk storage unit backups. Supposedly in 4.5 they will for just this reason.

~JK

Jon Walton wrote:

I believe they do not support this due the fact that operations on the database files involve file locking. That is what is remember

reading

in the Unix Admin Guide.

Regards,

Jon

-----Original Message----- From: Jeff Kennedy [mailto:jlkennedy@amcc.com] Sent: Friday, October 19, 2001 10:39 AM To: Manny Kaiser Cc: toasters@mathworks. com Subject: Re: Veritas Netbackup Database

Got word from Vertias that putting the /usr/openv filesystem itself on NFS was NOT supported. However, you could backup the database to a

NFS

disk without issue....

~JK

...

Manny Kaiser wrote:

Has anyone placed the Veritas Netbackup database on an NFS mounted file system? More specifically on a netapp? I was just told by Veritas that they do not recommend doing this because NFS is unreliable. Any feedback would be helpful.

--

Jeff Kennedy Unix Administrator AMCC jlkennedy@amcc.com

-- ===================== Jeff Kennedy Unix Administrator AMCC jlkennedy@amcc.com