| Commit message (Collapse) | Author | Age | Files | Lines |
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Complexity involved: To migrate a file with open fd, we have to
notify the other client process which has the open fd, and make
sure the write()s happening on that fd is properly synced to the
migrated file. Once the migration is complete, the client
process which has open-fd should get notified and it should
start performing all the operations on the new subvolume,
instead of earlier cached volume.
How to solve the notification part:
We can overload the 'postbuf' attribute in the _cbk() function to
understand if a file is 'under-migration' or 'migration-complete'
state. (This will be something similar to deciding whether a file
is DHT-linkfile by its 'mode').
Overall change includes below mentioned major changes:
1. dht_linkfile is decided by only 2 factors (mode(01000),
xattr(trusted.glusterfs.dht.linkto)), instead of earlier
3 factors (size==0)
2. in linkfile self-heal part (in 'dht_lookup_everywhere_cbk()'),
don't delete a linkfile if there is a open-fd on it. It means,
there may be a migration in progress.
3. if a file's revalidate fails with ENOENT, it may be due to file
migration, and hence need a lookup_everywhere()
4. There will be 2 phases of file-migration.
-> Phase 1: Migration in progress
* The source data file will have SGID and STICKY bit set in its mode.
* The source data file will have a 'linkto' xattr pointing the
destination.
* Destination file will have mode set to '01000', and 'linkto' xattr
set to itself.
-> Phase 2: File migration Complete
* The source data file will have mode '01000', and will be 'truncated'
to size 0.
* The destination file will have inherited mode from the source. (without
sgid and sticky bit) and its 'linkto' attribute will be removed.
4. Changes in distribute to work smoothly with a file which is in migration /
got migrated.
The 'fops' are divided into 3 categories, inode-read, inode-write and others.
inode-read fops need to handle only 'phase 2' notification, where as, the
inode-write fops need to handle both 'phase 1' and phase2. The inode-write
operations will be done on source file, and if any of 'file-migration' procedures
are detected in _cbk(), then the operations should be performed on the destination
too.
when a phase-2 is detected, then the inode-ctx itself should be changed to represent
a new layout.
With these changes, the open file migration will work smoothly with multiple clients.
Change-Id: I512408463814e650f34c62ed009bf2101d016fd6
BUG: 3071
Reviewed-on: http://review.gluster.com/209
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vijay@gluster.com>
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Change-Id: I2d10f2be44f518f496427f257988f1858e888084
BUG: 3348
Reviewed-on: http://review.gluster.com/200
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@gluster.com>
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Change-Id: I3914467611e573cccee0d22df93920cf1b2eb79f
BUG: 3348
Reviewed-on: http://review.gluster.com/182
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@gluster.com>
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Use f_bavial instead of f_bfree for %free calculation
This fixes mismatch of df output wrt backend and glusterfs
where: f_bfree = /* # free blocks */
f_bavail; /* free blocks avail to non-superuser */
Signed-off-by: shishir gowda <shishirng@gluster.com>
Signed-off-by: Anand Avati <avati@gluster.com>
BUG: 3084 (Correcting percent calculation of disk space)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=3084
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Signed-off-by: Shishir Gowda <shishirng@gluster.com>
Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>
BUG: 2346 (Log message enhancements in GlusterFS - phase 1)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2346
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also fill tabs by spaces (untabify), and indent the code
Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>
BUG: 2346 (Log message enhancements in GlusterFS - phase 1)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2346
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We had normalization of statvfs structure in 'cluster/unify' translator,
with distribute, we had this section as 'TODO:'. Now, the same code is
migrated to distribute.
Thanks to <marty.rosenberg@gmail.com> for sending the patches
Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
BUG: 1035 (The distribute translator does not handle differently sized block sizes and/or fragment sizes)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1035
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Signed-off-by: Vijay Bellur <vijay@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>
BUG: 971 (dynamic volume management)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=971
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Signed-off-by: Pranith Kumar K <pranithk@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>
BUG: 1388 ()
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1388
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Signed-off-by: shishir gowda <shishirng@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>
BUG: 1573 (Incorrect information about disk space in dht)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1573
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Signed-off-by: Sachidananda Urs <sac@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
BUG: 1068 ()
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1068
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Signed-off-by: lakshmipathi <lakshmipathi@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
BUG: 799 (dht prints 100% full when subvolume is not connected to remote host)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=799
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Signed-off-by: Anand V. Avati <avati@blackhole.gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
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Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
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Originally from Paul Rawson <plrca2@gmail.com>
http://patches.gluster.com/patch/391/ : patch re-submitted with patching guidelines.
cluster/distribute, and cluster/nufa uses new option PERCENT_OR_SIZET for its
option 'min-free-disk'.
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
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the current msg is getting printed in warning level. Instead changed
it to debug, as the msg specific each node being full is already getting
printed in higher priority, hence this msg looks excessive.
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
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This can happen when 'option export-statfs-size off' is given in
posix volume. Caused divide by 0 error.
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>
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Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
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fixes bugs seen with dht's disk usage.
Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
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creates are not confused.
Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
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files.
distribute gets awareness about disk-space while creating the files
Signed-off-by: Anand V. Avati <avati@amp.gluster.com>
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