Gill,
 
It is always hard to give general 'specific' advise but here I go.
 
Concerning the collocation. There is a new feature in TSM 5.3 called a 
c'collocation group'. So you can define a set of nodes that will use the same 
tapes. By making a trade off between the number of servers and the number of 
tapes you want to use, you can define a number of collocation groups to have an 
optimum between tape usage and required restore times. 
 
Archives are meant for long term offsite storage. I don't include them in copy 
storage pools. The latter are in case of a disaster and that is why backups are 
taken. 
 
See that the server that will be running the ISC console has 1 GB RAM for the 
ISC only. It is no fun if you have to wait 10 seconds after every click. And 
check the supported OS'es for the ISC. The last time I've checked it didn't run 
yet on AIX 64 bit. 
 
best regards,
Kurt
 

________________________________

Van: ADSM: Dist Stor Manager namens Gill, Geoffrey L.
Verzonden: vr 12/16/2005 18:07
Aan: ADSM-L AT VM.MARIST DOT EDU
Onderwerp: [ADSM-L] lto2's and TSM 5.3



I'd like to ask those who are using the LTO2 drives with TSM 5.3 a few
questions and some advice. I'm in the process of building a system to
replace the one I have. It will run AIX5.3 and TSM 5.3. My plan is to keep
the old system around and let the data expire off but lets talk about the
new system. Because I have little experience with 5.3 maybe those that are
using it can give me some advice.



Because these tapes hold so much data, using collocation as it is on TSM 5.2
seems a bit much, one tape per node. I have heard a little about the way
collocation has changed but for those using it on 5.3 would you relay your
experiences and recommendations.



Disk pools and tape drives will not be an issue but with almost 300 nodes
the system will be busy at times. Please relay your experience as to how you
run schedules. Do you have any nodes/schedules that run direct to tape?



Archives. Do you keep a second copy offsite or are they just sent offsite
and recalled if needed for reclamation or retrieval of data?



Anything you would do differently if you had the chance to redo your system?



Any other recommendations with TSM 5.3?



I have a windows server already running TSM 5.3 just so I can take a look at
it. No tape drives just a bit of disk to run a couple of desktop computers
to as a test. It is also running the admin console and my plan is to leave
it there and not install it on the TSM server.



Thanks for the advice and help,



Geoff Gill

TSM Administrator

SAIC M/S-G1b

(858)826-4062

Email:  <mailto:geoffrey.l.gill AT saic DOT com> geoffrey.l.gill AT saic DOT com