Re: [ADSM-L] Dedup rate on SAP backups

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.Loon AT klm DOT 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
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Kind Regards, Groetje,

Marcel Anthonijsz
T: +31(0)299-776768
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