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.
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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For what it's worth ,I've having generally low dedup rates 40-50% on Notes as well on NBU 7 with MSDP
thanks again
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
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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