Anybody else checked out the perforamnce of Lotus Notes agent backups using a NBU7 Deduplicating Media Server?
What sort of Dedup rates are you getting with mail databases?
What I have seen on HP rebadged Sepatons hasn't been that impressive for mail databse servers.
Lotus Notes database that contian non-mail files dedup well. Its only the personal mail files thatseen to be a problem.
I've seen many various results for Notes files with both PureDisk and PDDE, and in most cases the names.nsf does not de-dup well. Also, if the Domino server is set up to compact the NSF files, you would again get worse de-dup as blocks are moved around etc.
Apart form that, usually in the range of 80-95% per backup, so a little bit worse than normal file server backups, but still in the acceptable range. Exhange doesn't really do much better.
It is the nature of the application type, a lot of changes every day...
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Thanks for the info. I try to look for the possible solution with that issue but I can't find any answer. Thanks for your help.
Bob Morton
thanks again
For what it's worth ,I've having generally low dedup rates 40-50% on Notes as well on NBU 7 with MSDP
Have you enabled compression for the data selection in PDROE or in the /usr/openv/lib/ost-plugin/pd.conf (PDDO/PDDE)?
This usally gives you another 2:1 on the already de-duped data. In PD 6.6.1 the compression algorithm was changed to a much better performing one, improving the de-dup ratio even further.
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