On Fri, 12 Apr 2002, Darrel Gleddie wrote: > A further comment on this subject: > > I will be transplanting a moderately sized TSM server from an H50 to a 7026-6H1. I > have just completed a trial run, to determine how long the process is going to > take. I used the latest full dbbackup from the H50, and did a dbrstore on the new > hardware. And, just for fun, I ran an audit db on the transplant. > > Both the old and new hardware use raid-5 ssa for the database, the new hardware > has 4 processors (600 MHZ) with 8 GB memory. For your planning purposes, here's the > stats from this environment: > > dbsize 73,656 MB @ 84% > dbbackup 03:32 > dbrestore 04:03 > auditdb 47:28 >
I have been curious about these numbers. Could you tell me why a 74gig db takes 4 hours to restore off of 3590K tape using a 3590E1A drive and also why it takes 3 1/2 hours to write? These numbers suggest a 3-4MB Read and a 4-5 MB write. Why not 11-12MB for both? > Both dbbackup and restore were done from a 3590 "K". And, thankfully, the audit ran > cleanly. > > Darrel Gleddie > IBM Almaden Research Center > Jonathan Siegle Center for Academic Computing [EMAIL PROTECTED] Penn State University
