Hello, Thank's for your update, but do you an idea to change the value, just because I'm sure that the default value is not use Regards Alain
-----Message d'origine----- De : IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] De la part de David Devine Envoyé : jeudi 7 février 2013 12:24 À : IBM-MAIN@LISTSERV.UA.EDU Objet : Re: blksize for ML2 migrated dataset via HSM Hello, The Datamover parameter of DSS or HSM only applies to Control dataset backups and is not for general usage. Hsm has used a 16k blocksize for backup and migration tapes since inception, possibly because originally it was a good performance match for the specs of existing 3420 "polo" tape drives and the upcoming 3480 "cartridge" tape drives. (People who read the announcment specs in the early 80's feel free to dive in!) Well overdue for an update. Dumps however are straight dfdss and depending on what Z/os release you are on, the blksize will be the default of 256K (Zos 1.12 up) or 64K (Zos 1.11 down) or even 32k if you use the patch! While we are at it, an ML3 level for long term archive datasets (greater than 5 years say) would be good to split them out from all the other stuff on ML2. regards, Dave *********************************************************************************************** Hello, I observed a blksize of 16k for all ml2 migrated dataset (seen on the CA1 product). I use DSS as datamover and i'm wondering about the size concerning the blksize. Why dss don't use 256k since zos 1.12 ? Everybody will have an answer. thank's ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN Ce message est confidentiel; Son contenu ne represente en aucun cas un engagement de la part de AXA Technology Services (AXA Tech) sous reserve de tout accord conclu par ecrit entre vous et AXA Technology Services (AXA Tech).Toute publication, utilisation ou diffusion,meme partielle, doit etre autorisee prealablement. Si vous n'etes pas destinataire de ce message, merci d'en avertir immediatement l'expe- diteur. This message is confidential; its contents do not constitute a commitment by AXA Technology Services (AXA Tech) except where provi- ded for in a written agreement between you and AXA Technology Services (AXA Tech). Any unauthorised disclosure, use or dissemina- tion, either whole or partial, is prohibited. If you are not the intended recipient of the message, please notify the sender imme- diately. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
