08-24-2012 07:44 AM
Also can we use the disk staging schedule to copy those dedupe images from disk to tape and still we will be able to perform the restore either from tape or from disk ( I also doubt on my this statement )
Regards ,
Rohit
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08-24-2012 08:01 AM
Rohit
You could use the same disk if you wish - it won't be the same storage unit - the issue here is free space cauculations and you don't want two different things using the same disk or they will both get confused
It is also best practice to out the de-dupe database component on fast disk (so data goes on SATA and DataBase goes on SAS for example)
You cannot use disk staging for de-dupe - you will need to set up LifeCycle policies (which are far more efficient anyway)
It will be the SLPs that duplicate the de-dupe from disk to tape and you will be able to restore from either (depending by default on which is the primary copy)
Hope this helps
08-24-2012 08:01 AM
Rohit
You could use the same disk if you wish - it won't be the same storage unit - the issue here is free space cauculations and you don't want two different things using the same disk or they will both get confused
It is also best practice to out the de-dupe database component on fast disk (so data goes on SATA and DataBase goes on SAS for example)
You cannot use disk staging for de-dupe - you will need to set up LifeCycle policies (which are far more efficient anyway)
It will be the SLPs that duplicate the de-dupe from disk to tape and you will be able to restore from either (depending by default on which is the primary copy)
Hope this helps
08-24-2012 11:36 AM
Hi Mark ,
Please correct me if I am wrong if I setup a DAS or SAN disk attched to the Media Server and on that disk I create a Basic Disk storage unit and will perform the Dedupe on that basic disk and configure the storage life cycle policy for copying the data from Basic Disk to Tape , than as per your statement still I am able to restore the data which one is primary .
Regards ,
Rohit
08-24-2012 11:51 AM
No, Dedupe disk is not configured as Basic Disk.
Please go through the following two documents to see how to configure dedupe disk. (Careful planning is key to success.)
08-28-2012 04:15 AM
As i and Marianne says - bacis disk cannot be used a de-dupe
You need to create a new de-dupe disk volume / pool
It will be a dedicated volume containing all of the data plus preferably another location for its database etc.
08-28-2012 11:40 AM
Thanks Marianne and Mark ,
I have tested the Dedupe function after adding the PDD key on my NBU master server and configured a test dedupe storage unit configiured on Media server , below is the logs result which shows Dedupe function is working fine .
28/08/2012 15:42:45 - Info xxxxxx(pid=6360) StorageServer=PureDisk:xxxxxx; Report=PDDO Stats for (xxxxxxx): scanned: 4693675 KB, stream rate: 255.29 MB/sec, CR sent: 24273 KB, dedup: 99.5%, cache hits: 36573 (99.5%)
28/08/2012 15:42:46 - end writing; write time: 00:02:01
the requested operation was successfully completed(0)
Could you please answer on my last query if I configured the Storage unit on either on Data Domain or NBU appliances than I don't think I can use both the media server de dupe or the appliance de dupe both , as it will not make any major difference
08-29-2012 02:56 AM
When using a DataDomain the de-dupe will be done by the DD appliance itself so you dont get the client side or media server side de-dupe.
When using a N52** appliance it is itself a Media Server and so can do client side or media server side de-dupe
When using a N50** appliance it is a puredisk appliance so you can do client side, media server side or appliance side de-dupe.
If possible client side will always give you the best backups - especially with NBU 7.5 and using the accelerator, so you loose those abilities when using DD although the OST plugin will be supported eventually.
Wondering why you have marked your question as the solution?