Hi Eric, I find this redbook, although not for IBM SP, a nice read on best practices for dedup: IBM ProtecTIER Implementation and Best Practices Guide, SG24-8025-03 It is aimed at IBM ProtecTIER but a lot of these best practices are valid for _any_ deduplication implementation:
http://www.redbooks.ibm.com/abstracts/sg248025.html?Open Page 334 (section 20.6.9) mentions: - Disable multiplexing. - Use as many backup sessions in parallel as possible, not exceeding MAXNUMMP - Disable compression by configuring RL_COMPRESSION=NO (no-brainer!) Let us know if this helps... 2017-05-19 16:47 GMT+02:00 Loon, Eric van (ITOPT3) - KLM < eric-van.l...@klm.com>: > Hi guys! > Now that we are testing with TSM deduplication where we have always used a > Data Domain in the past, I discovered that our SAP nodes have a very low > dedup rate. After some Googling it looks like this has something to do with > the random way SAP sends its data to the backup client. If backup files > physically differ every backup run, I can imagine that this will have a > negative impact on deduplication. > Does anybody know if this is true and if there is a way to influence this > behavior? > Thanks for any help in advance and have a nice weekend! > Kind regards, > Eric van Loon > Air France/KLM Storage Engineering > ******************************************************** > 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 > ******************************************************** > -- Kind Regards, Groetje, Marcel Anthonijsz T: +31(0)299-776768 M:+31(0)6-53421341
