ADSM-L

Re: [ADSM-L] TSM 5.6 reorg

2013-04-04 09:14:13
Subject: Re: [ADSM-L] TSM 5.6 reorg
From: "Loon, EJ van - SPLXM" <Eric-van.Loon AT KLM DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 4 Apr 2013 15:12:05 +0200
Hi Jerome!
The performance of the unload/load process is hardly predictable.
Performance varies enormously during the unload process and seems to be
related to the amount of fragmentation. You can get an idea about your
fragmentation by running the following SQL query:
      SELECT CAST((100 - (CAST(MAX_REDUCTION_MB AS FLOAT) * 256 ) / -
      (CAST(USABLE_PAGES AS FLOAT) - CAST(USED_PAGES AS FLOAT) ) * 100)
AS - 
      DECIMAL(4,2)) AS PERCENT_FRAG FROM DB
The read performance of the database is also crucial to the unload
performance, if possible place your database on (multiple) SSD disks.
Kind regards,
Eric van Loon
AF/KLM Storage Engineering


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Swartz, Jerome
Sent: donderdag 4 april 2013 13:33
To: ADSM-L AT VM.MARIST DOT EDU
Subject: TSM 5.6 reorg

Hi All,

I am about to reorg my 200GB TSM DB this weekend. Anyone know
approximately how long it will take to complete?

Thanks

Jerome


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