03-23-2012 05:23 AM
hello guys,
what would you say is the compression rate of using deduplication. (e.g 50% or what)
My backups to a VTL is about 10TB, if i buy 20TB license for deduplication and a disk storage device, what would the total backup look like
if i have to re-run all the FULL BACKUPS to the new disk.
Do you think i would get a 50% reduction on the disk(ie instead of 10TB to the VTL would i now get 5TB to the disk).
Thanks
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03-23-2012 05:47 AM
That really is a "how long is a piece of string" question.
It all depends on your data type
If you have a lot of encrypted of hig density multi media files then you may not get much in the way of de-dupe rates.
If your backups are the run of the usual run of the mill users docuements, SQL and Exchange databases etc. then i have seen 99 and 100% on the second run
If you do a lot of SQL logs backups then enable de-dupe compression to get any de-dupe on those at all
There are de-dupe assesment tools available so you may want to ask your Symantec partner for some advice or consultancy to do some testing for you
Hope this helps
03-23-2012 05:47 AM
That really is a "how long is a piece of string" question.
It all depends on your data type
If you have a lot of encrypted of hig density multi media files then you may not get much in the way of de-dupe rates.
If your backups are the run of the usual run of the mill users docuements, SQL and Exchange databases etc. then i have seen 99 and 100% on the second run
If you do a lot of SQL logs backups then enable de-dupe compression to get any de-dupe on those at all
There are de-dupe assesment tools available so you may want to ask your Symantec partner for some advice or consultancy to do some testing for you
Hope this helps
03-23-2012 07:15 AM
Please go through the following manuals and URL's as part of dedupe planning deployment:
NBU Deduplication Guide http://www.symantec.com/docs/TECH127071
NBU Deduplication: Additional Info http://www.symantec.com/docs/TECH77575
http://eval.symantec.com/flashdemos/products/netbackup/dedupe_calc2/
http://www.symantec.com/docs/TECH159417
http://eval.symantec.com/mktginfo/enterprise/white_papers/ent-whitepaper-global-dedupe-customer-results_12-2007_13561423.en-us.pdf
03-23-2012 07:25 AM
Deduplication Rates are always tricky, if your data is a lot of DB's than the rate will be very low but if you have more files is very likely it will be way better, I always recommend if is budget posible to split the DB clients from the File clients between 2 different VTL's and only introduce a SIR or deduplication cluster to the environment dedicated to the file servers, some customers like that because they can control their deduplications and not just guess and the VTL environment for DB's because it doesnt gives much dedup rate they add more storage to the VTL using the Dedup cash.
03-23-2012 02:34 PM
Hello
2 things :
Regards.