Richard, Are you using all the 8 drives of LTO? When the backup is running you type q mount, how many drives you see mounted? On init<SID>.utl, which values are you using for multiplex and maxsessions? On gigabit ethernet, are you using jumb frames? On iostat how's the tm-act column?
Regards, Anderson > It's not an SSA array, it's a JBOD in mirror. > I can't give you more machine details alas (customer confidential). The only details I can give you are: > > RS/6000 model F80 > 2 CPU > 1 GB memory > SAP DB size 100GB on SSA disks (JBOD with mirroring) > 3584 LTO with 8 LVD drives > TSM server 4.2.1.8 > TSM client 4.2.1.15 > TDP for R/3 3.2.0.6 > > Richard. > > -----Original Message----- > From: James Thompson [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, February 13, 2002 4:30 PM > To: [EMAIL PROTECTED] > Subject: Re: LTO strange behaviour > > > You mention 20 MB/sec and that the SAP database is on an SSA array. Well > some SSA array's have a maximum throughput of 20 MB/sec. This depends on the > adapter, and how you have the SSA array configured. > It would be nice to get the machines hardware configuration more completely. > > Also have you benchmarked your SSA array to see what maximum throughput it > can sustain. If you are running 8 streams of backup through one SSA > adapter, you could run into contention. > > James Thompson > > _________________________________________________________________ > Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp. >
