We must save and free the original kstrdup()'ed pointer
because strsep() modifies its first argument.
Signed-off-by: Tero Roponen tero.ropo...@gmail.com
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 1776dbd..9e2c9ec 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -260,7 +260,7
Hi there,
I would like to know if there is something functionally equivalent to
NetApp's SnapMirror in the works or planning? It would require block
level access to a snap and the ability to rebuild (subvolumes
including it's) snap's on another machine.
If not, what would be the best way to
LVM Snapshot.
lvm -s -n SnapShotName /dev/VolumeGroup/SourceLogicalVolumeName
you may need to pass -l or -L to give an initial size for the COW.
(as for rebuilding on another machine, that would require shared
storage or additional LVM tricks to export/import - or good old
fashioned dd)
that
- Original Message -
Hi there,
I would like to know if there is something functionally equivalent to
NetApp's SnapMirror in the works or planning? It would require block
level access to a snap and the ability to rebuild (subvolumes
including it's) snap's on another machine.
If
On 20100830 10:07, Fred van Zwieten wrote:
Hi there,
I would like to know if there is something functionally equivalent to
NetApp's SnapMirror in the works or planning? It would require block
level access to a snap and the ability to rebuild (subvolumes
including it's) snap's on another
I think drbd does precisely what you want.
It's not useful for fault tolerance, nor for load balancing, but it
will
produce a remote block copy that can be used as a sort of hot
backup.
drbd with heartbeat/pacemaker can provide fault tolerance...
Vennlige hilsener / Best regards
roy
--
On 20100830 10:59, Roy Sigurd Karlsbakk wrote:
I think drbd does precisely what you want.
It's not useful for fault tolerance, nor for load balancing, but it
will
produce a remote block copy that can be used as a sort of hot
backup.
drbd with heartbeat/pacemaker can provide fault tolerance
level.
Fred
On Mon, Aug 30, 2010 at 7:55 PM, K. Richard Pixley r...@noir.com wrote:
On 20100830 10:07, Fred van Zwieten wrote:
Hi there,
I would like to know if there is something functionally equivalent to
NetApp's SnapMirror in the works or planning? It would require block
level access
On Mon, Aug 30, 2010 at 2:15 PM, Fred van Zwieten fvzwie...@gmail.com wrote:
I just glanced over the DRBD/LVM combi, but I don't see it being
functionally equal to SnapMirror. Let me (try to) explain how
snapmirror works:
On system A there is a volume (vol1). We let this vol1(A) replicate
[PATCH V4 1/8] Cleancache: Documentation
Add cleancache documentation to Documentation/vm and
sysfs ABI documentation to Documentation/ABI
Signed-off-by: Dan Magenheimer dan.magenhei...@oracle.com
Diffstat:
ABI/testing/sysfs-kernel-mm-cleancache | 11
vm/cleancache.txt
[PATCH V4 0/8] Cleancache: overview
Changes from V3 to V4:
- Rebased to 2.6.36-rc3
- Use exportfs/filehandle for unique file identification on next-gen FS's
(Many thanks to Andreas Dilger for guidance on the new exportfs interface!)
See get_key and struct cleancache_filekey in cleancache.[ch]
[PATCH V4 2/8] Cleancache: cleancache_poolid in superblock
Add cleancache_poolid to superblock structure... not tied
to CONFIG_CLEANCACHE so as to avoid unnecessary clutter.
Signed-off-by: Dan Magenheimer dan.magenhei...@oracle.com
Diffstat:
fs.h |5
[PATCH V4 4/8] Cleancache: VFS hooks for cleancache
Implement core hooks in VFS for: initializing cleancache
per filesystem; capturing clean pages evicted by page cache;
attempting to get pages from cleancache before filesystem
read; and ensuring coherency between pagecache, disk,
and cleancache.
[PATCH V4 3/8] Cleancache: core ops functions and configuration
Cleancache core ops functions and configuration
Credits: Cleancache_ops design derived from Jeremy Fitzhardinge
design for tmem; sysfs code modelled after mm/ksm.c
Note that CONFIG_CLEANCACHE defaults to on; all hooks devolve
to a
[PATCH V4 5/8] Cleancache: ext3 hook for cleancache
Filesystems must explicitly enable cleancache by calling
cleancache_init_fs anytime a instance of the filesystem
is mounted and must save the returned poolid. For ext3,
all other cleancache hooks are in the VFS layer including
the matching
[PATCH V4 6/8] Cleancache: btrfs hooks for cleancache
Filesystems must explicitly enable cleancache by calling
cleancache_init_fs anytime a instance of the filesystem
is mounted and must save the returned poolid. Btrfs
uses its own readpage which must be hooked, but all other
cleancache hooks
[PATCH V4 7/8] Cleancache: ext4 hook for cleancache
Filesystems must explicitly enable cleancache by calling
cleancache_init_fs anytime a instance of the filesystem
is mounted and must save the returned poolid. For ext4,
all other cleancache hooks are in the VFS layer including
the matching
On 08/30/2010 03:31 PM, Dan Magenheimer wrote:
[PATCH V4 3/8] Cleancache: core ops functions and configuration
Cleancache core ops functions and configuration
Credits: Cleancache_ops design derived from Jeremy Fitzhardinge
design for tmem; sysfs code modelled after mm/ksm.c
Note that
On 08/30/2010 03:32 PM, Dan Magenheimer wrote:
[PATCH V4 4/8] Cleancache: VFS hooks for cleancache
Implement core hooks in VFS for: initializing cleancache
per filesystem; capturing clean pages evicted by page cache;
attempting to get pages from cleancache before filesystem
read; and
On 08/30/2010 03:32 PM, Dan Magenheimer wrote:
[PATCH V4 5/8] Cleancache: ext3 hook for cleancache
Filesystems must explicitly enable cleancache by calling
cleancache_init_fs anytime a instance of the filesystem
is mounted and must save the returned poolid. For ext3,
all other cleancache
to
online the DB on system B on any of the snap's, or, even cooler, to
replicate one of those snap's back to system A, doing a block based
rollback at the filesystem level.
Fred
On Mon, Aug 30, 2010 at 7:55 PM, K. Richard Pixleyr...@noir.com wrote:
On 20100830 10:07, Fred van Zwieten wrote:
Hi
+#ifdef CONFIG_CLEANCACHE
+#define cleancache_enabled (cleancache_ops.init_fs)
Pointers can be used in a boolean context, but it would probably be
cleaner to have this evaluate to a proper boolean type. Also I'd
probably go with an all-caps macro name rather than making it look like
a
+ if (s-cleancache_poolid = 0) {
+ int cleancache_poolid = s-cleancache_poolid;
That's a lot of characters for a local in a 3-line scope.
:-) OK.
+ s-cleancache_poolid = -1; /* avoid races */
Races with what? Something else sneaking
@@ -1349,6 +1350,7 @@ static int ext3_setup_super(struct super
} else {
ext3_msg(sb, KERN_INFO, using internal journal);
}
+ sb-cleancache_poolid = cleancache_init_fs(PAGE_SIZE);
Do you really need to pass in the page size? What about just
rollback at the filesystem level.
Fred
On Mon, Aug 30, 2010 at 7:55 PM, K. Richard Pixleyr...@noir.com wrote:
On 20100830 10:07, Fred van Zwieten wrote:
Hi there,
I would like to know if there is something functionally equivalent to
NetApp's SnapMirror in the works or planning? It would
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