Re: [Networker] cloning or staging policy for D2D2T architecture

Hello,

You should upgrade to 7.3 and use the new feature that enables to set
different retention policies for primary and cloned backups.

Regards,
Tarik El Mansouri
 

-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] 
On
Behalf Of Rich Graves
Sent: vendredi 17 février 2006 19:50
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] cloning or staging policy for D2D2T architecture

I'm designing improvements to a classic situation of slow and unreliable
tape-to-tape clones, where some guy takes the clone copies home with him on
a [hopefully] regular basis. The goals are improved backup speed,
reliability, and disaster recovery abilities. I find that we are
dark-fiber-rich, but cash-poor, so the idea is this:

legato server ----5km single-mode fibre channel---- cheap SATA RAID
  |
  |
  |
local SDLT tape drives

All data center backups go to an advanced file device on the remote SATA
trays, immediately off-site. We are in a tornado corridor, so disasters
happen, but 5km is considered "probably" far enough. I am sizing the SATA
trays to hold only about two weeks' worth of full backups + incrementals
because it's just a DR copy, yet I need a *complete* DR copy.

To handle the contingency of SATA RAID failure or a backhoe incident with
the fiber, I would like all savesets to be copied "as soon as possible" to
the legacy SDLT jukebox that sits in the main data center next to the backup
server. I'm aware of the Tao of

I don't think that conventional "Staging" works for me because I don't want
the original removed from the media database. I want the data copied from
the staging area to tape *quickly*, but I want the originals to be
recoverable from disk without running scanner. I guess the alternative is to
do cloning rather than staging, but then I need to script the deletion of
the originals.

Has someone else already written and debugged such scripts? I kinda need the
inverse of the typical nsrclone-and-recycle-old-clones script. Or is there
some way to do what I want with the built-in Staging features?

We'll be running NetWorker 7.2.1 on Linux, 4 SDLT-320 drives, Apple Xserve
RAID at the other end of long-wave 2G FC transceivers.
--
Rich Graves <rgraves AT carleton DOT edu>

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