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тАО10-19-2006 10:45 AM
тАО10-19-2006 10:45 AM
I am about to embark on a replication scheme using snapshot / snapclone of HP EVA using SSSU. (Creating Vsnaps and deleting older ones in a cyclic fashion)
I can force the Lum WWWN name to a set that I can obtain and re-use them. However the UUID seems to be not under my control.
Will I run out of UUIDs over a period of time.
Please share your experience and I appreciote your advise/suggestions and comments.
THANKS
Solved! Go to Solution.
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тАО10-19-2006 08:40 PM
тАО10-19-2006 08:40 PM
Re: EVA6000 Will the UUID will run out
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тАО10-19-2006 08:55 PM
тАО10-19-2006 08:55 PM
SolutionPart of the UUID for storage objects is taken from the EVA's back-end port WWNs (with some bit twisting to mark it as an extended WWN identifier), but the usage of the remaining bits is not documented.
From looking at some UUIDs it looks like it is a 48-bit counter (allowing for 281,474,976,710,656 values), because the lowest 16 bits seem to be 0000 in all cases, but my guess could be wrong. Even if the counter has reached the max. value, there is a chance that it just wraps around.
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тАО10-21-2006 04:16 AM
тАО10-21-2006 04:16 AM
Re: EVA6000 Will the UUID will run out
1. Will I run out of UUIDs over a period of time - NO
The aforesaid author is right in hi explanation of UUIDs. Am not aware of specific numbers, but for all practical puroses u wont run out of UUIDs
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тАО10-22-2006 12:37 AM
тАО10-22-2006 12:37 AM
Re: EVA6000 Will the UUID will run out
1. You can create a maximum of 16 snapshots per vdisk.
2. max. no of objects-
Vdisks + snapclone + snapshot < 1024
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тАО05-06-2009 03:52 PM
тАО05-06-2009 03:52 PM
Re: EVA6000 Will the UUID will run out
Many thanks