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BuisnessCopy: pairsplit(ing) before PAIR state

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BIHAN
Frequent Advisor

BuisnessCopy: pairsplit(ing) before PAIR state

Hello,
I just try to split a group in COPY state.
It results a PSUS-COPY state and the SVOL is usable (it may uses the PVOL like some kind of snapshot).
The HP document don't show this feature, is it supported by HP ?
Do you know if it is supported by SAP ?

1 REPLY
Peter Mattei
Honored Contributor
Solution

Re: BuisnessCopy: pairsplit(ing) before PAIR state

Well, you just discovered the Quick Split option!
This is one of the beautiful XP features.

This feature is fully supported by HP.
SAP does not need to support this, because the XP handles everything transparent. The S-VOL presented to SAP is identical no matter if you do quick split or steady split.
In the case of quick split the updates are copied in the background. If you happen to access data in the S-VOL that is not copied yet, the XP will first copy that track and then service your IO.

Please read more in the BC manuals, section "Pairsplit Operation".

For the XP128/1024 starting on page 16
http://h200002.www2.hp.com/bc/docs/support/SupportManual/lpg29350/lpg29350.pdf

For the XP48/512 starting on page 24
http://h200002.www2.hp.com/bc/docs/support/SupportManual/lpg28386/lpg28386.pdf


Enjoy
Peter


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