Shrinking Support - Revision history

Hch: /* Available pieces */

Hch — Sun, 21 Dec 2008 21:19:17 GMT

‎Available pieces

Sandeen: minor cleanup

Sandeen — Sun, 21 Dec 2008 18:36:17 GMT

minor cleanup

Sandeen: remove dup bullet point

Sandeen — Sun, 21 Dec 2008 18:34:34 GMT

remove dup bullet point

Hch at 18:26, 21 December 2008

Hch — Sun, 21 Dec 2008 18:26:31 GMT

Hch: /* Available pieces */

Hch — Sun, 21 Dec 2008 18:25:22 GMT

‎Available pieces

Hch: /* Available pieces */

Hch — Sun, 21 Dec 2008 18:19:22 GMT

‎Available pieces

Hch: start collectiong the bits and pieces

Hch — Sun, 21 Dec 2008 18:15:39 GMT

start collectiong the bits and pieces

Hch: New page: Currently XFS Filesystems can't be shrunk. To suppor shrinking XFS filesystems a few thinks needs to be implemented, based on a list by Dave Chinner [http://marc.info/?l=linux-xfs&m=11913...

Hch — Sun, 21 Dec 2008 18:08:05 GMT

New page: Currently XFS Filesystems can't be shrunk. To suppor shrinking XFS filesystems a few thinks needs to be implemented, based on a list by Dave Chinner [http://marc.info/?l=linux-xfs&m=11913...

New page

Currently XFS Filesystems can't be shrunk.

To suppor shrinking XFS filesystems a few thinks needs to be implemented, based on a list by Dave Chinner [http://marc.info/?l=linux-xfs&m=119131697224361&w=2]:

* An ioctl or similar interface to prevent new allocations from a given allocation group.

* A variant of the xfs_reno tool to support moving inodes out of filesystem areas that go away.

* A variant of the xfs_fsr tool to support moving data out of the filesystem areas that go away.

* An ioctl or similar interface to prevent new allocations from a given allocation group

* Some way to move out orphan metadata out of the AGs truncated off

* A transaction to shrink the filesystem.

At that point, we'll got a "working" shrink that will allow
shrinking to only 50% of the original size because the log will
get in the way. To fix that, we'll need to implement transactions
to move the log...

@@ Line 24: / Line 24: @@
 == Available pieces ==
-* A script from Ruben Porras to check if enough free space is available to support shrinking [[http://marc.info/?l=linux-xfs&m=118581682117599&w=2]]
+* A script from Ruben Porras to check if enough free space is available to support shrinking [http://marc.info/?l=linux-xfs&m=118581682117599&w=2]
 * A patch from Ruben Porras to allow / disallow allocation from an allocation group [http://marc.info/?l=linux-xfs&m=118302806818420&w=2] plus userspace support for setting / clearing it [http://marc.info/?l=linux-xfs&m=118881137031101&w=2]

← Older revision		Revision as of 18:34, 21 December 2008
Line 10:		Line 10:

	* A variant of the xfs_fsr tool to support moving data out of the filesystem areas that go away.		* A variant of the xfs_fsr tool to support moving data out of the filesystem areas that go away.
−
−	* An ioctl or similar interface to prevent new allocations from a given allocation group

	* Some way to move out orphan metadata out of the AGs truncated off		* Some way to move out orphan metadata out of the AGs truncated off

← Older revision		Revision as of 18:26, 21 December 2008
Line 2:		Line 2:

	To suppor shrinking XFS filesystems a few thinks needs to be implemented, based on a list by Dave Chinner [http://marc.info/?l=linux-xfs&m=118091640624488&w=2]:		To suppor shrinking XFS filesystems a few thinks needs to be implemented, based on a list by Dave Chinner [http://marc.info/?l=linux-xfs&m=118091640624488&w=2]:
		+
		+	* A way to check space is available for shrink

	* An ioctl or similar interface to prevent new allocations from a given allocation group.		* An ioctl or similar interface to prevent new allocations from a given allocation group.

← Older revision		Revision as of 18:25, 21 December 2008
Line 30:		Line 30:

	* The xfs_reno too, see [[Unfinished_work#The_xfs_reno_tool]]		* The xfs_reno too, see [[Unfinished_work#The_xfs_reno_tool]]
		+
		+	* An untested patch from Dave Chinner for a xfs_swap_inodes ioctl that allows to not just defragment extents but moving the whole inode [http://marc.info/?l=linux-xfs&m=119552278931942&w=2] and a patch to xfs_reno to use it from Ruben Porras [http://marc.info/?l=linux-xfs&m=119582841808985&w=2]

← Older revision		Revision as of 18:19, 21 December 2008
Line 25:		Line 25:
	* A script from Ruben Porras to check if enough free space is available to support shrinking [[http://marc.info/?l=linux-xfs&m=118581682117599&w=2]]		* A script from Ruben Porras to check if enough free space is available to support shrinking [[http://marc.info/?l=linux-xfs&m=118581682117599&w=2]]

−	* A patch from ~~Dave Chinner~~ to allow / disallow allocation from an allocation group [http://marc.info/?l=linux-xfs&m=~~118181261313174~~&w=2]	+	* A patch from Ruben Porras to allow / disallow allocation from an allocation group [http://marc.info/?l=linux-xfs&m=118302806818420&w=2] plus userspace support for setting / clearing it [http://marc.info/?l=linux-xfs&m=118881137031101&w=2]
		+
		+	* The xfs_fsr tool in xfsprogs
		+
		+	* The xfs_reno too, see [[Unfinished_work#The_xfs_reno_tool]]

@@ Line 1: / Line 1: @@
 Currently XFS Filesystems can't be shrunk.
-To suppor shrinking XFS filesystems a few thinks needs to be implemented, based on a list by Dave Chinner [http://marc.info/?l=linux-xfs&m=118091640624488&w=2]:
+To support shrinking XFS filesystems a few things needs to be implemented, based on a list by Dave Chinner [http://marc.info/?l=linux-xfs&m=118091640624488&w=2]:
 * A way to check space is available for shrink
@@ Line 15: / Line 15: @@
 * A transaction to shrink the filesystem.
-At that point, we'll got a "working" shrink that will allow
+At that point, we'll have a "working" shrink that will allow
-shrinking to only 50% of the original size because the log will
+shrinking to only 50% of the original size because the log
-get in the way. To fix that, we'll need to implement transactions
+(in the middle of the filesystem) will
 to move the log...