"Jousma, David" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED] fo53.com>... > All, > > We just completed implementation of a 3-way TS7700 grid servicing 6 > CEC's. A problem we see is that a newly created tape dataset created in > Grid-1 is being referenced by a second job, but out of Grid-2 before the > replication of the data has completed. The end result is really poor > application runtime as the data gets copied over. > > Have any of you seen this? What did you do to fix? We do have our > Storage guys working with IBM on this, but other experience might get us > a solution quicker.... > > Thanks, Dave > >
David, Not directly an answer, but some questions to get the picture: I suppose you mean cluster-1 and cluster-2 where you say grid-1 and grid-2. I suppose this is not due to a 3-way Grid, a 2-way Grid has the same delay and problem? You specify Deferred, not RUN, copypolicy for the tape? Deferred copies are all delayed for a (hardcoded) 5 minutes, according to my experience. Why is the application performance poor? Does the narrow bandwidth between the clusters limit the performance of the application? Is the performance of the replication similarly slow? What are you looking for? If the job is delayed until the copy has finished, it will end later then when it reads the tape slowly, won't it? Kees. ********************************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ********************************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
