Hello Alan, At the very least, you need to know the Write Rate (in MB/s) of the DASD volumes that will be replicated. I guess it depends on your available tools, but the RMF Post Processor reports may be the best place for you to start this analysis.
I would start with the following report: DINTV(0015) <---- Ensure lowest available INT for better granularity REPORTS(CHANNEL) <---- Use CHAN if the RMFGAT is not running to create Type 79-C REPORTS(IOQ) REPORTS(DEVICE) REPORTS(CACHE) REPORTS(FCD) <---- Ensure ESS coded in ERBRMFnn in SYS1.PARMLIB REPORTS(ESS) <---- Ensure ESS coded in ERBRMFnn in SYS1.PARMLIB SUMMARY(INT,TOT) Don't forget to consider other bandwidth factors like data compression, protocol overhead and link headroom (you don't want your link running at 100% all the time), the relative values of which are to variable to mention. Also, you don't mention whether it is Sync (Truecopy) or Async (Universal Replicator) replication that you are planning...as this may/will also have a bearing on the bandwidth that you can live with. Of course your local HDS folks would be able to assist....there will be Professional Services (Remote Copy Planning and Design service) that are available to help. Best of luck. Cheers, Maurice Clark Principal Consultant - Architecture and Design Global Solution Services Hitachi Data Systems Australia Level 4, 441 St Kilda Road Melbourne VIC 3004 Australia ---------------------------------------------------------------------- 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
