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clarification on RP use
Customer wants to do a recovery test for 2 of their servers ( AIX and Linux ) . The replication is from xtremIO to VNX using RP (4.4)i have been provided with the Host to Lun mapping list . The test servers on the DR will be zoned at the time of the test .
I am little familiar with the testing a copy procedure . What I do not understand is that do I have to create a separate storage group for the test and assign the copy luns again in that storage group for the DR servers to access . I already see a SG created with name _RPA_SG that has Journal luns and copy luns . All The luns are boot from san Luns
Could some one tell me the procedure what needs to be done for the test in my case ? Attached is the screenshot .
I have an additional question. When we do a test on CG , how are the replication sets in the CG also participate in the test ?
Please explain the process if possible
fadliz
153 Posts
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June 28th, 2017 04:00
yes, you need to mask the LUN to the DR hos by creating a DR host SG and giving access only to the replica LUNs.
armin2504
15 Posts
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June 28th, 2017 07:00
So I have 2 hosts AIX ( HACMP) and Linux ( VCS) cluster I need 2 separate Storage groups for each of the clusters .Does these clusters need a separate zoning as compared to how we zone regular hosts?The lun should be accessible to both the hosts in the cluster .
please clarify . Thanks !
forshr
1.1K Posts
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June 29th, 2017 00:00
Yes, the hosts will need to be zoned to the VNX SP ports in order to for their initiators to be connected to the SGs.
You also need to add the replica volumes to the RP SG.
Regards,
Rich
armin2504
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June 29th, 2017 08:00
Hello Thanks for the suggestion .Customer is replicating from XtremIO to VNX .Is it advisable to pause the replication and take a snapshot and then resume the replication . Is there any issue is doing this ? Would like to know the best practices , thanks
forshr
1.1K Posts
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June 30th, 2017 07:00
I don't follow? RP is taking a snapshot from the XtremIO array as part of the replication cycle.
Regards,
Rich
armin2504
15 Posts
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June 30th, 2017 08:00
Thanks Rich . RP does a snap based replication fr the xtremio storage
forshr
1.1K Posts
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July 3rd, 2017 05:00
Are you asking if you can generate an XtremIO array based snapshot whilst RP is generating a snapshot?
armin2504
15 Posts
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July 4th, 2017 09:00
No . I was just confirming to what you said about the Recoverpoint taking snapshot from the XtremIO array as part of the replication cycle.
I have one small query related to this test . The DR test will be for 48 Hours . Is it recommended to do a direct access mode after logged access? I understand journal is not kept and a full sweep is done in direct access mode . Does that mean all the journals for the copy at the DR will be lost ? if not when is the direct access mode recommended .
thanks!
forshr
1.1K Posts
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July 5th, 2017 12:00
Direct access mode is recommended when there is a probability of the image access log filling which may happen with the conventional journal used on the VNX. This is dependent on a number of factors though. Firstly, the amount of writes versus the size of the image access log as a default 20% proportion of the journal. Secondly, if in fact the default of 20% is used. This cannot be changed dynamically by the way. it has to be done whilst the CG is disabled or with multi-copy, whilst the replica copy is disabled. However, even if it has been changed from the default to a higher number (up to 80%) it is again proportionate and dependent on the overall size of the journal.
You have listed the side-effects relating to direct image access and losing the journal PiT history for the replica copy journal is one of these side-effects. The alternative to this is to clone the replica volumes on the VNX once in image access mode, then disable image access mode and then use the clones for the testing.
Regards,
Rich