"TISLER Zaromil" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > > > It depends on what you call CF mirroring: System Managed Coupling Facility > Structure Duplexing is supported now. This requires direct links between the > CF's and these links seem to be limited to 5 km to prevent unacceptable > delays. > > According to "System-Managed CF Structure Duplexing", page 32 GM13-0103-05 > (June 2004) > <URL: > http://www-03.ibm.com/servers/eserver/zseries/library/techpapers/pdf/gm13010 > 3.pdf > > > "Recommendation: In a GDPS/PPRC multi-site configuration, do not duplex CF > structure > data between coupling facilities located in different sites; rather, if > desired, duplex the > structures between two coupling facilities located at the same site. CF > structure data is not > preserved in GDPS site failover situations, regardless of CF Duplexing." > > There is no newer information on "Coupling Facility and the Parallel > Sysplex" > <URL: http://www-03.ibm.com/servers/eserver/zseries/pso/coupling.html > > > Regards, > Zaromil >
We found the information in: http://www.redbooks.ibm.com/redpieces/pdfs/sg246374.pdf from July 2005, page 13 and 14: " This feature is primarily intended to allow installations to do data sharing without having to have a failure-isolated CF. However, the design of SM Duplexing means that having the CFs a significant distance (kilometers) apart can have a dramatic impact on CF response times for the duplexed structures. " 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. ********************************************************************** ---------------------------------------------------------------------- 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
