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Clones on R2 side
As per Primus solutions,In order to perform a clone on R2-side one full copy is needed before activating in a consistent mode for SRDF/A.Can this be incremental after this? or does this needs to be full copy every time?
I am listing the commands also..let me know,if they are(not)going to work for R2 side.
Symclone -g create -precopy -diff -rdf -tgt (For the initial establishment,or is the -copy -diff going to work also?)
symclone -g activate -consistent -rdf -tgt
let me say,I need to sync the clone day after with changed data,Can i issue,
symclone -g establish -consistent -rdf -tgt
Also,I am planning to use the -both_sides with the establish but it seems its giving me an error (not a valid option)
symclone -g establish -consistent -both_sides
Your suggestions..
null
I am listing the commands also..let me know,if they are(not)going to work for R2 side.
Symclone -g create -precopy -diff -rdf -tgt (For the initial establishment,or is the -copy -diff going to work also?)
symclone -g activate -consistent -rdf -tgt
let me say,I need to sync the clone day after with changed data,Can i issue,
symclone -g establish -consistent -rdf -tgt
Also,I am planning to use the -both_sides with the establish but it seems its giving me an error (not a valid option)
symclone -g establish -consistent -both_sides
Your suggestions..
null
xe2sdc
2.8K Posts
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January 30th, 2009 02:00
And you need precopy even when you recreate the clones. However you can clone incrementally (after the first full copy).
Since you need precopy, -copy won't work
Before activating the clones you need to wait a full precopy cycle.
symclone -g
(or check symclone query output)
When precopy did its dirty work, you can activate consistently your clone
In case you want to "refresh" the clones, you need to recreate them (again with precopy option) wait for a full precopy cycle (same command as above) and finally activate consistently the clones
Are you using clones on both sides (R1/R2) ??
Message was edited by:
Stefano Del Corno
add recreate directions
srichev
130 Posts
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January 30th, 2009 05:00
symdg -g recreate -precopy
If the first create has -precopy -diff,remaining going to be just the changes instead of full copy.Is the above going to work?
What is the option -both_sides?Is this going to allow me to activate clones at the same time on R1 and R2 sides?
xe2sdc
2.8K Posts
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January 30th, 2009 05:00
Note that when you create session with -differential, the recrate will obviously be incremental. The pre-copy process doesn't force a full copy. Enabling pre-copy means you start copying tracks right after CREATING/RECREATING the pairs. Thus when you recreate sessions, you'll start copying changed tracks.
Please note that the procedure I gave you is what my beloved customer uses twice every day on 20 servers
xe2sdc
2.8K Posts
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January 30th, 2009 06:00
everytime?
No I mean customer is doing incremental copies with precopy enabled.
Recreating (with precopy) a differential clone will copy only changed data (no full copy).
srichev
130 Posts
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January 30th, 2009 06:00
If you can check the both sides option that would be great.
srichev
130 Posts
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January 30th, 2009 07:00
Allen Ward
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February 2nd, 2009 08:00
As Stefano pointed out, the precopy cycle after the initial activate is only an incremental update even though we talk about a "full cycle". The precopies after the first activate tend to be fairly fast... but that will depend a lot on your rate of change.
xe2sdc
2.8K Posts
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February 2nd, 2009 11:00
symclone -sid xxx -file pairfile -precopy -cycled verify
The command will return $? = 0 if all devices in pairfile (or if you prefer in your DG) already completed the precopy. Any other return code means at least a device is still precopying (poor wording but hope it's clear)
Allen Ward
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February 2nd, 2009 12:00
It is actually another team that manages the clone process since it is part of a business process that has to tie into quiescing the database on the R1 side of the SRDF/A link. Storage is only responsible for making sure SRDF/A stays up.
xe2sdc
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February 2nd, 2009 22:00
process since it is part of a business process that
has to tie into quiescing the database on the R1 side
of the SRDF/A link. Storage is only responsible for
making sure SRDF/A stays up.
Thus you have to carefully check that cycles switches every 30 seconds .. and you have to check that frames flow to the R2 side .. and that the R2 side applies them consistently ?? Not that bad
srichev
130 Posts
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February 4th, 2009 06:00
xe2sdc
2.8K Posts
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February 4th, 2009 16:00
srichev
130 Posts
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February 12th, 2009 08:00
xe2sdc
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February 17th, 2009 01:00