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тАО12-16-2005 07:33 AM
тАО12-16-2005 07:33 AM
Why do I need to vgexport after split off BCV's, and vgimport before mount them
I thought the device files for BCV should be always the same on the backup server.
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тАО12-16-2005 07:49 AM
тАО12-16-2005 07:49 AM
Re: Why do I need to vgexport after split off BCV's, and vgimport before mount them
We do the same here - backup server splits the bcv's and mounts them locally.
Rgds...Geoff
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тАО12-16-2005 08:32 AM
тАО12-16-2005 08:32 AM
Re: Why do I need to vgexport after split off BCV's, and vgimport before mount them
But, in reality, not only here, also I saw a lot of cases people would do vgexport and vgimport, there got to be some reasons behind?
Please check out this thread:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=540089
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тАО12-16-2005 09:26 AM
тАО12-16-2005 09:26 AM
Re: Why do I need to vgexport after split off BCV's, and vgimport before mount them
Like I said - you only need to do the vgexport (from server with standards) and vgimport (on the backup server) the first time.
After that, you only need to do the split, vgchange -a y, and mount - then reverse after you are done (unmount, vgchange -a n, sync (or sync at a predetermined time).
Rgds...Geoff
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тАО12-17-2005 07:25 AM
тАО12-17-2005 07:25 AM
Re: Why do I need to vgexport after split off BCV's, and vgimport before mount them
Best reason for doing that is to ensure that you have the very best copy of the data.
e.g if you export your vg means all your old data is flushed and import it makes a very fresh copy of the data.
Which is highly recomended by many DR/BC consultants. Thats is the reason.
Also by doing that you can ensure that the system level problems are NIL in the event of real time DR/BC
I got this from one book on DR I don't remember, as that was my project...
Cheers ...007
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тАО12-19-2005 12:58 AM
тАО12-19-2005 12:58 AM
Re: Why do I need to vgexport after split off BCV's, and vgimport before mount them
1). Manually ensure that everytime you modify the volume group, you do a vgexport and vgimport.
2). Automatically vgexport/vgimport at each split.
Which you do is up to you. #1 takes more disipline as you need to make sure it's done when needed.
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тАО12-19-2005 04:46 PM
тАО12-19-2005 04:46 PM
Re: Why do I need to vgexport after split off BCV's, and vgimport before mount them
Or so I thought until I read Geoff's response, which I'm sure works.
I guess I didn't add much to this, I just really thought the vgchgid was critical before the mount.
Jim