Easy to imagine, not take the same amount of money the tape drive cost and
buy disk, stripe the disks across 5-6 drives and two controllers at the
block level. Dedicate this resource to the one server for the backup period
and run the backup. Which is faster now? Also compress on the client so we
have an apples and apples comparison.
If you want, multi-thread the client (just to disk though since the one tape
drive cannot do this)
Which is faster now?
Jeff Bach
Home Office Open Systems Engineering
Wal-Mart Stores, Inc.
WAL-MART CONFIDENTIAL
-----Original Message-----
From: Magura, Curtis [SMTP:curtis.magura AT LMCO DOT COM]
Sent: Monday, April 30, 2001 10:22 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 500GB Backup
Due to a temporary lack of disk we had to start writing backups from
one of
our large NT file servers directly to tape. we have two large NT
file
servers backing up at the same time. One going to SSA disk pool the
other to
a pool that is writing directly to 2 3590E1A's. TSM Server is hosted
on a
RISC/6000 H70. Both client machines backup up around 75-80 GB per
night on
average. They are both Compaq 6500's connected to IBM ESS for disk.
In most cases the machine backing up directly to tape out performs
the
machine backing up to the disk pool. This is just comparing Total
Elapsed
Time and nothing else.
Imagine that!
Curt Magura
Lockheed Martin EIS
Gaithersburg, Md.
301-240-6305
-----Original Message-----
From: Dearman, Richard [mailto:rdearm1 AT UIC DOT EDU]
Sent: Monday, April 30, 2001 11:07 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: 500GB Backup
We have 3590EA1 drives using Ultra Scsi connection that write at
14MB/s
which I believe is faster than the SSA disks write speed. I think
the the
3590EA1 will write at 40MB/s if using compression. I don't see my
tape
drives writing faster than my disk.
-----Original Message-----
From: Burton, Robert [mailto:ROBERT.BURTON AT ROYALBANK DOT COM]
Sent: Monday, April 30, 2001 9:59 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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