Hi, I have a backup performance problem: All data was written to STK VSM5, which has 4 ficon channel allocated as front end channels. There are two types of backup jobs: One and the only one is file backup job which is using ADRDSSU to backup lots of files(including some large VSM clusters). Others are DB2 image copy jobs.
The problem is: If file backup job run concurrently with DB2 image copy jobs, file backup will run very slowly. I can see SIO count from SDSF is above 1000, while DSS backup not higher than 500. If it run without DB2 image copy jobs running, file backup will finish very soon. However customer need them to run concurrently to shorten backup window. A real number shows: If file backup job run with db2 imae copy jobs, elapse time was 98 minutes, if run itself,elapse time was 32 minutes. Can anyone give me some advice? regards Victor ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
