The disks are not setup optimally. A DD to one 10K SSA disk to another can
run a 30 Meg per second. Stripe across five drives and this will be even
faster for a single system. The problem usually is the person that
optimizes the disks does not optimize them for ADSM.
If you turn on compression on the client, and you get 3 to 1 compression,
multiply the disk speed times 3 that you are getting writing to the server
now.
Aren't you really comparing uncompressed Disk writes to compressed tape
writes?
Jeff Bach
Home Office Open Systems Engineering
Wal-Mart Stores, Inc.
WAL-MART CONFIDENTIAL
-----Original Message-----
From: Burton, Robert [SMTP:ROBERT.BURTON AT ROYALBANK DOT COM]
Sent: Monday, April 30, 2001 10:24 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 500GB Backup
We have benchmarked this to death....EMC/IBM and Hitachi disk we can
get 8
to 10 MB/s, on both IBM 3590e's and STK 9840 we are getting
35 to 40 MB/sec....
-----Original Message-----
From: Remeta, Mark [mailto:MRemeta AT SELIGMANDATA DOT COM]
Sent: Monday, April 30, 2001 11:04 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 500GB Backup
Since when???
-----Original Message-----
From: Burton, Robert [mailto:ROBERT.BURTON AT ROYALBANK DOT COM]
Sent: Monday, April 30, 2001 10:59 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 500GB Backup
Tape direct is a heck of a lot faster than disk....
Robert Burton
Open System Storage Analyst
Royal Bank of Canada
315 Front St West
Toronto, On, M5V 3A4
416-348-3849
email: Robert.Burton AT royalbank DOT com
-----Original Message-----
From: Dearman, Richard [mailto:rdearm1 AT UIC DOT EDU]
Sent: Monday, April 30, 2001 10:56 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 500GB Backup
Why would I send the data to tape first writing to disk is faster.
-----Original Message-----
From: Vibhute, Bandu [mailto:BVibhute AT BAKING.BESTFOODS DOT COM]
Sent: Friday, April 27, 2001 3:22 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 500GB Backup
What I understood from your setup is as follows.
You are doing cold backup everyday using TSM disk pools. Your backup
time is
6 hrs for 500 Gig and you will be backing up 1TB in next few months.
Your
TSM server has only one SSA Adapter.
If you could do following changes in your setup, You should be able
to
reduce backup window time.
1. Schedule backup with multiple threads using Gigabit Fiber Channel
Interface.
2. Configure Copy group to send backup data directly to tapes( Don't
use
disk group)
-Bandu
-----Original Message-----
From: Dearman, Richard [mailto:rdearm1 AT UIC DOT EDU]
Sent: Friday, April 27, 2001 1:42 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 500GB Backup
The amount of data is the same everday 500GB full backup. I'm using
one SSA
card in the tsm system. I could get Gig cards if I have proof that
I'm
maxing out the current 100mb cards in the system and I don't seem to
be
doing that. The tsm server is plugged into the same switch has the
backup
server and on the same ip subnet. Also, the database files that I'm
backing
up are just oracle dump files. The tsm serve is also running aix
4.3.3.
-----Original Message-----
From: Vibhute, Bandu [mailto:BVibhute AT BAKING.BESTFOODS DOT COM]
Sent: Friday, April 27, 2001 12:35 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 500GB Backup
We are backing up 2 servers of capacity 1.2 TB everyday. We have
shark
system and flash copy is implemented on shark. Without client
interference
we backup 1.2 Gig to TSM. It's running with 6 drives. No LAN/Free.
But it's
Client/Free backup. To restore we have placed Gbit Interfaces in
Client and
TSM Server.
You need to give more information of your server and database.
Are you doing incremental or full backup and which database you
have?
If incremental how much data is changed everyday?
Can you afford GBit interface between data server and TSM? ( IT
needs 2
adapter and 1 switch)
How many drives your library have? How many SSA adapters are
installed in
server?
Thank you,
Bandu Vibhute,
Bestfoods Baking Company,
55 Paradise Lane, Bay Shore, NY, 11706
Voice: 631-951-5212, Cell: 516-702-0323
-----Original Message-----
From: PINNI, BALANAND (SBCSI) [mailto:bp3965 AT SBC DOT COM]
Sent: Friday, April 27, 2001 1:01 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 500GB Backup
Importance: High
Hi
If I am correct IBM offers LAN free backup which is faster .But need
to
purchase additional s/w.
pinni
-----Original Message-----
From: Dearman, Richard [mailto:rdearm1 AT UIC DOT EDU]
Sent: Friday, April 27, 2001 11:48 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: 500GB Backup
I need to backup a 500GB database and my current setup is my tsm
server is
on the same ip subnet has the database server. Tsm is connected to
500GB of
SSA storage with 5 RAID5 sets with two 50GB tsm volumes on each raid
set.
My though put to the disk only seems to be 9000 kB/s. Which doesn't
seem
very high to me. My backup time is about 6 hours. Does anyone have
any
better senarios for backing up this amount of data in the smallest
amount of
time soon. I am going to be backing up a 1Tb per day and I need to
get me
backup times to the lowest. Does anyone have any suggestions on how
to do
that.
Thanks
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