When we moved TSM off the mainframe, we moved to a 4 way 660-6H1
(7026-660) with 4 gig ram. But as Wanda inidicated, I think planning
for i/o is much more important. Our box has 2 i/o shelves and 6 fiber
channel adaptors to spread the i/o.
We back up between 110 - 775 GB/day with a total of 11.5 T in primary
tape pool storage. Our cpu averages around 10-20% busy during the busy
part of the cycle but occasionally averages 50% busy for a couple of
hours.
>>> [EMAIL PROTECTED] 8/20/2003 7:38:41 AM >>>
Wanda,
My TSM DB is 78% of 32GB. I have a hodge bodge of clients,
180
servers and 300 desktops. Of the 15 TB, 2TB is a pre-compressed data
warehouse that looks like a dozen files. On the other hand I have a
bunch
of Wintel servers that have less than 20GB and over a million files.
My
current tape drives are 8 9840s (escon attached). The new environment
would
be Fiber attached, probably 9940s. I have almost .5 TB disk pool on
SHARK.
THe disk pools can be reassigned to the new environment... I just
don't
have a good guess at the CPU sizes or type.
Right now I am using a GB ethernet adapter and 2 ATM adapters
on
the mainframe to move data. I am in the process of moving everything
to the
GB ethernet adapter. WHAT SHOULD BE MY EXPECTED THROUGHPUT? I haven't
seen
it above 35MB/sec yet. I realize I will not see the max until I have
many
different concurrent backups using the adapter.
Matt
-----Original Message-----
From: Prather, Wanda [mailto:[EMAIL PROTECTED]
Sent: Tuesday, August 19, 2003 4:33 PM
To: [EMAIL PROTECTED]
Subject: Re: TSM MF to AIX sizing?
1) How big is your current TSM DB?
2) How many clients do you support?
3) Is your 15 TB per month zillions of little files, or mostly big
data
bases?
4) What type of tape drives/library are you planning to use?
TSM on AIX usually isn't CPU intensive except during EXPIRE INVENTORY;
I
vote for 2 faster CPU's.
Most people hit an I/O bottleneck before the CPU bottleneck.
Just like on z/OS, make sure you buy enough disk/adapters/SSA loops so
you
can spread your disk I/O over more than one I/O path. (Or at least
make
sure you can add an adapter/bus later if you need to add I/O paths.)
You
want to have your DB and recovery log on DIFFERENT disks than your
storage
pools, if possible. One big RAID array usually isn't the best choice
for
speed.
You usually want at most 2 tape devices on a bus.
How much redundancy you require in disk/tape paths depends on how
important
up time is to you.
Just like on z/OS, 100% up time is required if you are implementing the
TSM
HSM function; less than 100% up time is probably satisfactory if TSM
only
has to be available for nightly backups and occasional restores.
As a former mainframer, I can say with confidence you will be VERY
HAPPY at
how well TSM runs on AIX, the I/O just screams....
-----Original Message-----
From: MC Matt Cooper (2838) [mailto:[EMAIL PROTECTED]
Sent: Tuesday, August 19, 2003 1:12 PM
To: [EMAIL PROTECTED]
Subject: TSM MF to AIX sizing?
Hello all,
WE are currently running TSM 515 on z/OS 1.1 (9672-x57 gen 6)
and
are considering moving it to AIX to free up CPU cycles that are being
used
during 1st shift. As we consider that versus doing thing to make it
run
better on 2nd and 3rd (use 2 TSM servers, FICON to TAPE instead of
ESCON,
LAN FREE for a few big Servers) I need to know the characteristics of
the
AIX box to move to. We are backing up about 15TB a month now. I don't
know
if we should be looking for a 2CPU machine or a 4CPU machine or if
money is
best spent on 2 of the fastest CPUs versus 4 old CPU's. It is hard to
point
in a directions without knowing what the replacement system would be
and
therefore its costs. (yes I know that there is still 4GB of memeory, 2
GB
adapters, etc to cost out). Is there anyone that can give my the
voice of
experience or point me in the proper direction to correctly work this
problem though?
Thanks in Advance
Matt
