Anonymous_User Absent Member.
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Pool Snapshots?

Hello,

We are thinking about using the Pool Snapshot option on our Netware servers to speed up our backups. Any opinions on this? Any TIDS on how to actually setup and configure it?

Using Netware 65.5

Thanks
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4 Replies
Anonymous_User Absent Member.
Absent Member.

Re: Pool Snapshots?

On Fri, 14 Jul 2006 11:23:30 -0700, Scott Johnson
<Scott.Johnson@schwarz.com> wrote:

> Hello,
>
> We are thinking about using the Pool Snapshot option on our Netware
> servers to speed up our backups. Any opinions on this? Any TIDS on how
> to actually setup and configure it?


I believe the instructions (and maybe examples) are in the NSS docs
<http://www.novell.com/documentation/nw65/pdfdoc/nss_enu/nss_enu.pdf> over
at the NS65 page (<http://www.novell.com/documentation/nw65/index.html>).

IIRC, this wasn't turned on in NW60, so hopefully you're on NW65SP5 with
the os5 and nss5 updates.

/dps

--
Using Opera's revolutionary e-mail client: http://www.opera.com/m2/
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Anonymous_User Absent Member.
Absent Member.

Re: Pool Snapshots?

Are you currently using it? If so has it helped speed up your backups? Do you need twice the disk space in order to use this feature?

>>> Dave Schneider<dave.schneider@emulex.com> 7/14/2006 1:35:29 PM >>>


On Fri, 14 Jul 2006 11:23:30 -0700, Scott Johnson
<Scott.Johnson@schwarz.com> wrote:

> Hello,
>
> We are thinking about using the Pool Snapshot option on our Netware
> servers to speed up our backups. Any opinions on this? Any TIDS on how
> to actually setup and configure it?


I believe the instructions (and maybe examples) are in the NSS docs
<http://www.novell.com/documentation/nw65/pdfdoc/nss_enu/nss_enu.pdf> over
at the NS65 page (<http://www.novell.com/documentation/nw65/index.html>).

IIRC, this wasn't turned on in NW60, so hopefully you're on NW65SP5 with
the os5 and nss5 updates.

/dps

--
Using Opera's revolutionary e-mail client: http://www.opera.com/m2/
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Anonymous_User Absent Member.
Absent Member.

Re: Pool Snapshots?

Scott Johnson wrote:
> Are you currently using it? If so has it helped speed up your backups?


In my experience, pool snapshots were quite unstable. That said, I
haven't tried them since NW6.5 SP2, so hopefully things have improved
since then.

They didn't speed up the backup... they allowed open files to be backed-up.

> Do you need twice the disk space in order to use this feature?


No. When the snap is taken, a "virtual" volume representing a
point-in-time copy of the real volume is created, and only changes to
the file system are actually saved in this virtual volume.

So, the extra space you need depends entirely on how much data has
changed since the pool was snapped. If every file changed, you would
theoretically need 2x as much space, but in reality you only typically
need a fraction of the volume's size.

--
Jim
NSC Sysop
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Anonymous_User Absent Member.
Absent Member.

Re: Pool Snapshots?

On 15/07/06 Scott Johnson wrote:
> We are thinking about using the Pool Snapshot option on our Netware
> servers to speed up our backups.


They will have no effect on backup speed. Not sure where you got that
idea from. Their purpose is to allow backup of open files (or at least,
to backup the way that file was at the moment it was last opened).
--
Andrew C Taubman
Novell Support Forums Volunteer SysOp
http://support.novell.com/forums
(Sorry, support is not provided via e-mail)

Opinions expressed above are not
necessarily those of Novell Inc.
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