• Please help support our sponsors by considering their products and services.
    Our sponsors enable us to serve you with this high-speed Internet connection and fast webservers you are currently using at ADSM.ORG.
    They support this free flow of information and knowledge exchange service at no cost to you.

    Please welcome our latest sponsor Tectrade . We can show our appreciation by learning more about Tectrade Solutions
  • Community Tip: Please Give Thanks to Those Sharing Their Knowledge.

    If you receive helpful answer on this forum, please show thanks to the poster by clicking "LIKE" link for the answer that you found helpful.

  • Community Tip: Forum Rules (PLEASE CLICK HERE TO READ BEFORE POSTING)

    Click the link above to access ADSM.ORG Acceptable Use Policy and forum rules which should be observed when using this website. Violators may be banned from this website. This notice will disappear after you have made at least 3 posts.

Migrate COS data to new server

booman55

ADSM.ORG Senior Member
Joined
Feb 21, 2007
Messages
259
Reaction score
11
Points
0
We are in the process of assisting a customer with a DC move of legacy server and they use IBM COS for backend storage. The new server host has disk pool and tape available. The source host has lots of NAS file backups with millions of files stored on COS.

We've been doing node replication as means to migrate the data. I've tried using 4 streams and replicating direct to the 4 tape drives. I've tried putting nodes in nodegroup and replicating to disk pool with 40 or 50 sessions. Neither has been great with performance. All SP instances are running v8.1.13.

Any tips on performance settings or best practices when trying to migrate millions of files on COS to new server??
 

marclant

ADSM.ORG Moderator
Joined
Jun 16, 2006
Messages
3,788
Reaction score
625
Points
0
Location
Canada
Website
www.ibm.com
When dealing with millions of small files, there's a lot of database transactions. Make sure the database is on the fastest disk possible and use 12 database directories mounted to 12 filesystems, and each filesystem representing a LUN on the storage.

You'll have to backup the DB and restore it if you have a smaller number of database directories today because if you just add directories, it will take a while before the DB is balanced, so you want get the benefit right away.

The reason for several directories is that DB2 will increase the amount of parallelism it does when presented with more filesystems.

Replicating to disk is also the best approach and using large number of sessions like you are doing will be faster than directly to tape. You can migrate to tape after or even during.

It's possible the reads from COS are slow as well, but I don't have any experience with that.
 

booman55

ADSM.ORG Senior Member
Joined
Feb 21, 2007
Messages
259
Reaction score
11
Points
0
DB is spread across and provisioned appropriately. I'm thinking it's reads from COS, but was wondering if anyone had experience with migrating COS data.
 

The Spectrum Protect TLA (Three-Letter Acronym): ISP or something else?

  • Every product needs a TLA, Let's call it ISP (IBM Spectrum Protect).

    Votes: 22 19.8%
  • Keep using TSM for Spectrum Protect.

    Votes: 65 58.6%
  • Let's be formal and just say Spectrum Protect

    Votes: 15 13.5%
  • Other (please comement)

    Votes: 9 8.1%

Forum statistics

Threads
31,831
Messages
134,883
Members
21,793
Latest member
jonDoe2
Top