- NDMP is the only effective way to backup to tape a NAS with millions of
files. Unfortunately, the TSM support for NDMP is minimal and incomplete.
There is currently no way to make a second copy of the backup data to send
offsite. This is rumored to be fixed in the next version of TSM.
- The environment I work (NetApp 3020), the tape library is SAN switch
attached and the NetApp sees it just fine. The TSM Admin Guide shows the
supported tape connections.
- NDMP appears stable. It is at version 4 and NetApp has had it implemented
for quite a while.
- You can configure TSM and NDMP to obtain a Table-of-Contents that allows
single file restores from TSM/NDMP.
- At my client, we have decided that tape is not a viable backup solution
going forward. With many terabytes on our NetApp, we are going to use
SnapShots for backup and and remote mirroring for DR. Overall, this provides a
cleaner, cheaper to manage solution.
Orville L. Lantto
Glasshouse Technologies, Inc.
________________________________
From: ADSM: Dist Stor Manager on behalf of Wojtek Piecek
Sent: Fri 3/10/2006 6:38 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] NDMP question/-s
Hi All,
I have some question about backup functionality of NetApp (FAS270). We
have TSM server connected to Adic s10k library (2xlto2) and some stg
pool on external storage. All via FC, but we don't use netfree for
backup.
So, my question is - what is preferred method of backup NetApp? We can
use NDMP, but I heard:
. NDMP sucks (it's file-serving oriented, so backup they CAN do, but
poor than make that native b/a client)
. NDMP probably need strange connection to library (one man from
NetApp told us that FC build in them MUST be connected directly onto
library, another man from TSM support that must be connect to SAN).
Which is true?
. NDMP isn't stable. We want to backup/archive business data, they
MUST be readable in any time we hold this on TSM - some people, on
that list too, isn't sure about that.
. What about restoring ONE file from backup? Is it possible? Whiteout
restoring full NAS?
. Is it any other solution for backup NAS? Critical for us is backup
acl for files/directories on NAS - we have heterogeneous network, we
(plan to) connect to NAS from AIX, Linux (redhat and debian, but NFS,
different version) and Windows.Any machine can write, any read, so
it's very urgent to always have ACL.
. single point of failure for NDMP via FC.
. more?
If anyone have experience in that, please write.
--
--w
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