Thanks you for your recommended.
I am very sure the TOC is backed up to disk pool. But I wolud like to know
the algorithm which TSM use to restore file from image backup. The restore
file selection is quickly because it can read from TOC in the diskpool but
after selected, how TSM scan the actually data in the image backup. Do TSM
need to scan a whole image first before restore selected data. If so that
means if I have the backup volume about 1 TB and I need to restore some
files which may be 100 MB. TSM need to scan data about 1 TB before restore
100 MB,right? Any idea please suggest.
Best Regards,
Wira Chinwong
Engineering Department Manager
SCSi Co., Ltd.
719 KPN Tower Bldg., 11th Floor, Rama 9 Rd.,
Huaykwang, Bangkapi, Bangkok 10310
Tel 02-7171066-7 Fax 0-27171068
Mobile: 086-3204115
E-mail: wira AT scsi.co DOT th
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Shawn Drew
Sent: Thursday, July 03, 2008 8:46 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] TSM for NAS (NDMP) restoration algorithm
Are you sure the TOC was backed up for the particular image you are trying
to restore from? (Are you able to browse the contents of the directory with
the web client) Also, when you run the backup node command, are you
specifying "toc=yes"?
or the default "toc=preferred"
I had this problem when we were using "toc=preferred" Our TOC stgpool ran
out of space, and we didn't have a monitor for this. The NAS backups
continued to run successfully, but we didn't know that the TOC's weren't
being created. I switched everything to TOC=Y
Regards,
Shawn
________________________________________________
Shawn Drew
Internet
wira AT SCSI.CO DOT TH
Sent by: ADSM-L AT VM.MARIST DOT EDU
07/03/2008 08:12 AM
Please respond to
ADSM-L AT VM.MARIST DOT EDU
To
ADSM-L
cc
Subject
[ADSM-L] TSM for NAS (NDMP) restoration algorithm
TSM Expert,
I'm facing the NAS image restore performance issue. I have backup NAS volume
about 1 TB by using NDMP direct to LTO4 and collect the TOC on disk pool.
The backup is fine. But when I have to restore some files.
The restoration take too long time (more than 24 hours). Any idea please
suggest. I would like to know what is the methods that TSM use when restore
some file from image without restore the whole image first.
Thanks in advance.
Best Regards,
Wira Chinwong
Engineering Department Manager
SCSi Co., Ltd.
719 KPN Tower Bldg., 11th Floor, Rama 9 Rd., Huaykwang, Bangkapi, Bangkok
10310 Tel 02-7171066-7 Fax 0-27171068
Mobile: 086-3204115
E-mail: wira AT scsi.co DOT th
This message and any attachments (the "message") is intended solely for the
addressees and is confidential. If you receive this message in error, please
delete it and immediately notify the sender. Any use not in accord with its
purpose, any dissemination or disclosure, either whole or partial, is
prohibited except formal approval. The internet can not guarantee the
integrity of this message. BNP PARIBAS (and its subsidiaries) shall (will)
not therefore be liable for the message if modified. Please note that
certain functions and services for BNP Paribas may be performed by BNP
Paribas RCC, Inc.
|
