Solaris? Which server version? How many database volumes are there defined to TSM? How big are your database volumes? Thanks!
Luke "Remeta, Mark" wrote: > I have a 40gb database on RAID5 with no performance issues.. fyi... > not sure if you consider this small, average, or heavy. > > -----Original Message----- > From: Zlatko Krastev/ACIT [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, November 20, 2002 3:02 PM > To: [EMAIL PROTECTED] > Subject: Re: Database Questions > > You can find long discussions on this topic in the list archives. > - it is mostly disadvantageous to have more than one or two DB volumes per > disk/array - parallelism you create with more volumes results disk heads > moving back and forth. You are shooting yourself in the leg. > - RAID 5 is definitely not very good for TSM DB and for average or > heavy-loaded server might be disastrous for performance. For small servers > might be just fine. Your server with 35 GB DB does not fit in second > category. > - "sessions running for hours" sounds terrible. What is DB cache hit > ratio? Do you have DB volumes on Veritas filesystem?!? > > Zlatko Krastev > IT Consultant > > Luke Dahl <[EMAIL PROTECTED]> > Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> > 07.11.2002 19:47 > Please respond to "ADSM: Dist Stor Manager" > > To: [EMAIL PROTECTED] > cc: > Subject: Database Questions > > Does anyone know of any advantage/disadvantage of the file sizes for the > database? Is there an advantage to creating many 1Gb .db files over > fewer 10Gb .db files? Also, we're running TSM 4.2.1.15 on Solaris 5.8 > using raid 5. I've heard performance can be much greater with raid 0. > Any truth to that? We're seeing load averages above 10 nearly every day > and TSM performance is pretty poor. Our database size is 35Gb and > sessions are running for hours (even small incrementals of various > workstations). Network bandwidth hasn't peaked over 50% in any 24 hour > duration. Any thoughts? Many thanks in advance. > > Luke Dahl > NASA - Jet Propulsion Laboratory > 818-354-7117 > > Confidentiality Note: The information transmitted is intended only for the > person or entity to whom or which it is addressed and may contain > confidential and/or privileged material. Any review, retransmission, > dissemination or other use of this information by persons or entities other > than the intended recipient is prohibited. If you receive this in error, > please delete this material immediately.
