HP XP P9500 Storage User Manual
Page 140
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The THP V-VOL is released when the operation to reclaim zero pages is in progress.
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The initial copy operation between Continuous Access Synchronous pair or Continuous Access
Journal pair is performed on the THP V-VOL in which the zero pages are reclaimed.
Releasing pages in a THP V-VOL
You can reclaim pagess in a THP V-VOL to free pool capacity. If a page assigned to a THP V-VOL
contains only zero binary data, you can reclaim the page. Before releasing pages in a THP V-VOL,
see
).
Procedure 14 To release pages in a THP V-VOL
1.
In the Remote Web Console main window, in the Storage Systems tree, select a pool associated
with the THP V-VOLs whose pages are released. The pool information appears on the right.
2.
Click the Virtual Volumes tab.
3.
From the Virtual Volumes table, select the THP V-VOL for which you want to release the pages.
Select multiple THP V-VOLs using the Shift key (if the THP V-VOLs are adjacent), or using the
Ctrl key (if the THP V-VOLs are not adjacent).
4.
Click More Actions, and then select Reclaim Zero Pages.
The Reclaim Zero Pages window opens.
You cannot release pages in a THP V-VOL when the THP V-VOL is not in a normal status or
the THP V-VOL is in the process of reclaiming zero pages.
5.
In Task Name type a unique name for this task or accept the default, and then click Apply.
If Go to tasks window for status is checked, the Tasks window opens.
After the operation to reclaim zero pages is complete, click Refresh in Remote Web Console to
update the Page Status. If the Page Status is not immediately updated, wait a while, and then click
Refresh again.
If you have started the reclaiming zero pages operation, and the storage system is powered off
the reclaiming zero pages operation will not automatically continue after the storage system restarts.
In any of the following cases, the reclaiming zero pages will stop, and THP-VOL pages will not be
released:
•
LDEV formatting was performed while reclaiming zero pages.
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The pool-VOL that is being accessed by the target THP-VOL was blocked.
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The pool associated with the target THP-VOL was blocked while reclaiming zero pages.
•
Cache memory failure occurred while reclaiming zero pages.
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The THP-VOL was deleted when zero pages were reclaimed.
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The initial copy operation between the Continuous Access Synchronous pair or the Continuous
Access Journal pair was performed on the THP-VOL in which zero pages were being reclaimed.
Stopping the release of pages in a THP V-VOL
1.
In the Remote Web Console main window, in the Storage Systems tree, select a pool associated
with the THP V-VOLs in which the pages are being released. The pool information appears
on the right.
2.
Click the Virtual Volumes tab.
3.
From the Virtual Volumes table, select the THP V-VOL for which you want to stop releasing
pages.
Select multiple THP V-VOLs using the Shift key (if the THP V-VOLs are adjacent), or using the
Ctrl key (if the THP V-VOLs are not adjacent).
140 Configuring thin provisioning