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October 7th, 2009 08:00
Question about concurrent SRDF
I have 2 DMX-4 arrays and I want to make 2 separate SRDF copies of the same lun on our primary site. So, I have a database on our primary site and an SRDF copy in our DR site. I want to create a second SRDF copy on the DR site.
We're going to do DR testing. My plan is to split the current SRDF pair so I can mount the copy up on a machine in our DR site. This process is all configured already. The devices are paired, mapped and masked in DR and we've confirmed that this process works. The only problem is that for the weekend of testing, if I do a split of the database, during the entire time of the split we are working without a fully up to date copy of our production database. So, my plan was to create a second SRDF copy that will stay established through the weekend. That way, if there is a true failure during testing, we'll still have that up-to-the-minute copy sitting in DR that we can access and no data will be lost.
Someone mentioned that we can use concurrent SRDF, but all of the docs I've seen talk about this being used in a 3 array configuration where each SRDF copy is on a separate array.
We're going to do DR testing. My plan is to split the current SRDF pair so I can mount the copy up on a machine in our DR site. This process is all configured already. The devices are paired, mapped and masked in DR and we've confirmed that this process works. The only problem is that for the weekend of testing, if I do a split of the database, during the entire time of the split we are working without a fully up to date copy of our production database. So, my plan was to create a second SRDF copy that will stay established through the weekend. That way, if there is a true failure during testing, we'll still have that up-to-the-minute copy sitting in DR that we can access and no data will be lost.
Someone mentioned that we can use concurrent SRDF, but all of the docs I've seen talk about this being used in a 3 array configuration where each SRDF copy is on a separate array.
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xe2sdc
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October 10th, 2009 10:00
I guess you have to create new RDF groups (and use different RDFg for new pairs) but with recent codes it's quite easy and cheap
SKT2
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October 11th, 2009 03:00
xe2sdc
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October 12th, 2009 07:00
A_Wood
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October 12th, 2009 16:00
xe2sdc
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October 13th, 2009 08:00
You are suggesting the good old "golden copy" that EMC is pushing since ages. But the real issue here is that existing procedures manage directly the R2 devices and changing the procedures to manage BCV devices may be a pain...
And considere that the "golden copy" is mostly used when you restart the replica after a real disaster since you are trying to keep a consistent copy of your R2 devices while you mangle them with adaptive copy
redfly1
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October 22nd, 2009 02:00
We use this feature to automate our SAP-systemcopies from the R2-site.
MikeMac1
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October 27th, 2009 15:00
KD8EWE
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November 3rd, 2009 09:00
http://www.dg.com/collateral/hardware/white-papers/300-006-714-srdf-zero-data-loss-solutions-ext-distance-replication.pdf