This post is more than 5 years old
57 Posts
0
725
August 31st, 2010 12:00
SNAP veiw with third party replication software
Hi
I have two CX4 120 .The coustomer is running a CA replication software to replicate between the CX4 s .ie what ever data on LUN A on Clariion A is going to be available on LUN A on clariion B.Like mirror veiw.
I am planning to take a snapveiw clone of the target lun and use it for Report genration purpose.
My consern is
1.Is snap veiw going to work with the third party replication software (CA Xosoft)
2.Where i have to install the admsnap on the source server SQL 1 .
3.Is this the way done when a mirror veiw target LUN is cloned
Thanks in Advance
No Events found!
AranH1
2.2K Posts
0
August 31st, 2010 13:00
Adin,
That might work... I am not familiar with Xosoft. Is it host based replication? Is the target LUN owned by a host and is the data in a stable/consistent state? For instance with some replication tools that are synchronously/asynchronously replication devices, the target devices are 'owned' by the replication application and the data is not in a consistent state until you use the replication application to put the replicated blocks to a particular consistent point in time for host access. While you would be able, technically, to create a snap or clone of the replica on the remote array the data on the LUN may not be usable.
I would assume that Xosoft has some sort of replica access method to prepare the LUN for DR testing. If you put the LUN in that state then take a snap/clone of the LUN that should provide you a consistent point in time for data access.
Aran
Jim_A1
59 Posts
1
August 31st, 2010 18:00
Adin, as Aran has suggested, it will all depend on how in sync the 2 luns are when the snap is taken.
Using mirrorview terms, the luns need to be Insync for any snapview lun data to be useful.
If the luns are consistant, then the data on a subsequent snap may not be up to date and therefore not valid.
In your case as long as the 2 luns (source and target) are exact and up to date, then you will be able to either snapshot or snap clone the target lun.
A clone will however need the same lun size as the lun to be cloned, where as a snapshot only requires an RLP lun.
Snap works at the lun level, and does not care about what apps might be running on the lun.
Snap will insert itself on the lun stack when invoked. As this is a Clariion flare operation, the CA replication software will have no affect on snap.
jim