7
edits
Changes
Jump to navigation
Jump to search
Line 17:
Line 17: − + − dmsetup status − dmsetup remove mergeomatic</nowiki> − + + + + + + + Line 29:
Line 33: − + Line 38:
Line 42: − + + + + + + + +
no edit summary
Step 3: Stop the snapshot device and merge the snapshot with the base
Step 3: Stop the snapshot device and merge the snapshot with the base
<nowiki>dmsetup suspend top
<nowiki>dmsetup suspend top
echo 0 $(blockdev --getsize /dev/loop2) snapshot-merge /dev/loop2 /dev/loop3 p 8 | dmsetup create mergeomatic && dmsetup status mergeomatic
echo 0 $(blockdev --getsize /dev/loop2) snapshot-merge /dev/loop2 /dev/loop3 p 8 | dmsetup create mergeomatic && dmsetup status mergeomatic</nowiki>
Step 4: Set the top device to no snapshot, and inspect the filesystem for results, if desired.
Step 4: Wait for merge to complete. When the status report on mergeomatic reports allocated blocks equal to the metadata blocks, the merge is finished.
dmsetup status
Step 5: Remove the merge target.
dmsetup remove mergeomatic
Step 6: Set the top device to no snapshot, and inspect the filesystem for results, if desired.
<nowiki>echo 0 $(blockdev --getsize /dev/loop2) linear /dev/loop2 0 | dmsetup load top
<nowiki>echo 0 $(blockdev --getsize /dev/loop2) linear /dev/loop2 0 | dmsetup load top
dmsetup resume top
dmsetup resume top
chroot .</nowiki>
chroot .</nowiki>
Step 5: Clean up.
Step 7: Clean up.
<nowiki>cd ..
<nowiki>cd ..
umount root
umount root
umount squashfs/</nowiki>
umount squashfs/</nowiki>
Step 6: Copy the root filesystem image back into the squashfs image, you may need -noappend
Step 8: Copy the root filesystem image back into the squashfs image, you may need -noappend
<nowiki>mkdir LiveOS
<nowiki>mkdir LiveOS
mv ext3fs.img LiveOS
mv ext3fs.img LiveOS
rm /run/media/*/LIVE/LiveOS/squashfs.img
rm /run/media/*/LIVE/LiveOS/squashfs.img
mksquashfs LiveOS /run/media/*/LIVE/LiveOS/squashfs.img -keep-as-directory</nowiki>
mksquashfs LiveOS /run/media/*/LIVE/LiveOS/squashfs.img -keep-as-directory</nowiki>
Sources: <br>
*http://smorgasbord.gavagai.nl/2010/03/online-merging-of-cow-volumes-with-dm-snapshot <br>
*http://www.kernel.org/doc/Documentation/device-mapper/snapshot.txt<br>
*http://linuxgazette.net/114/kapil.html<br>
--[[User:Andrew Gilmore|Andrew Gilmore]]