Problem: AFR doesn't delay post-op for fsync fop. For fsync heavy workloads this leads to un-necessary fxattrop/finodelk for every fsync leading to bad performance. Fix: Have delayed post-op for fsync. Add special flag in xdata to indicate that afr shouldn't delay post-op in cases where either the process will terminate or graph-switch would happen. Otherwise it leads to un-necessary heals when the graph-switch/process-termination happens before delayed-post-op completes. Fixes: #1253 Change-Id: I531940d13269a111c49e0510d49514dc169f4577 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
The general idea of the changes is to prevent resetting event generation to zero in the inode ctx, since event gen is something that should follow 'causal order'. Change #1: For a read txn, in inode refresh cbk, if event_generation is found zero, we are failing the read fop. This is not needed because change in event gen is only a marker for the next inode refresh to happen and should not be taken into account by the current read txn. Change #2: The event gen being zero above can happen if there is a racing lookup, which resets even get (in afr_lookup_done) if there are non zero afr xattrs. The resetting is done only to trigger an inode refresh and a possible client side heal on the next lookup. That can be acheived by setting the need_refresh flag in the inode ctx. So replaced all occurences of resetting even gen to zero with a call to afr_inode_need_refresh_set(). Change #3: In both lookup and discover path, we are doing an inode refresh which is not required since all 3 essentially do the same thing- update the inode ctx with the good/bad copies from the brick replies. Inode refresh also triggers background heals, but I think it is okay to do it when we call refresh during the read and write txns and not in the lookup path. The .ts which relied on inode refresh in lookup path to trigger heals are now changed to do read txn so that inode refresh and the heal happens. Change-Id: Iebf39a9be6ffd7ffd6e4046c96b0fa78ade6c5ec Fixes: #1179 Signed-off-by: Ravishankar N <ravishankar@redhat.com> Reported-by: Erik Jacobson <erik.jacobson at hpe.com> (cherry picked from commit f0fcd909ad4535b60c9208d4804ebe6afe421a09)
Current implementation assumes that ping-event will come after connect event but that may not be the case in the cases where after socket connection fds need to be re-opened which would consume more time. So handle any order of the ping/child-up events. fixes: bz#1800583 Change-Id: I6bcdc0caa503bdc039ef2b4739fbf4afae121f05 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
fixes: bz#1760189 Change-Id: Iffbf8d6f4c50b8e2de8364658697bdbe96549f5d Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
After add-brick and rebalance, the ctime xattr is not present on rebalanced directories on new brick. This patch fixes the same. Note that ctime still doesn't support consistent time across distribute sub-volume. This patch also fixes the in-memory inconsistency of time attributes when metadata is self healed. Change-Id: Ia20506f1839021bf61d4753191e7dc34b31bb2df fixes: bz#1734026 Signed-off-by: Kotresh HR <khiremat@redhat.com>
Problem: On a EC volume, during upgrade from the older version where ctime feature is not enabled(or not present) to the newer version where the ctime feature is available (enabled default), the self heal hangs and doesn't complete. Cause: The ctime feature has both client side code (utime) and server side code (posix). The feature is driven from client. Only if the client side sets the time in the frame, should the server side sets the time attributes in xattr. But posix setattr/fseattr was not doing that. When one of the server nodes is updated, since ctime is enabled by default, it starts setting xattr on setattr/fseattr on the updated node/brick. On a EC volume the first two updated nodes(bricks) are not a problem because there are 4 other bricks with consistent data. However once the third brick is updated, the new attribute(mdata xattr) will cause an inconsistency on metadata on 3 bricks, which prevents the file to be repaired. Fix: Don't create mdata xattr with utimes/utimensat system call. Only update if already present. Change-Id: Ieacedecb8a738bb437283ef3e0f042fd49dc4c8c fixes: bz#1720201 Signed-off-by: Kotresh HR <khiremat@redhat.com>
Problem: The test case is failing to heal the volume within $HEAL_TIMEOUT @195. This is happening because as part of split-brain resolution the file gets expunged from the sink and the new entry mark for that file will be done on the source bricks as part of impunging. Since the source bricks shd-threads failed to get the heal-domain lock, they will wait for the heal-timeout of 10 minutes, which is greater than $HEAL_TIMEOUT. Fix: Set the cluster.heal-timeout to 5 seconds to trigger the heal so that one of the source brick heals the file within the $HEAL_TIMEOUT. Change-Id: Ie73c578cc5361c0d617a48ccc86026734d20ba8c fixes: bz#1718998 Signed-off-by: karthik-us <ksubrahm@redhat.com>
Problem: afr_child_up_status_meta works only when LOOKUP on $M0 is successful. There are cases where quorum is not met and LOOKUP fails on $M0 which leads to failures similar to: grep: /mnt/glusterfs/0/.meta/graphs/active/patchy-replicate-0/private: Transport endpoint is not connected This was happening once in a while based on attribute-timeout and md-cache not serving the lookup. Fix: Find child-up status based on statedump instead. Also changed mount options to include --entry-timeout=0 and --attribute-timeout=0 updates bz#1193929 Change-Id: Ic0de72c3006d7399a5feb3e4d10d4748949b2ab3 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Change-Id: Iceefe22af754096c599dc570d4894d14fce4deae Updates: bz#1193929 Signed-off-by: Xavier Hernandez <xhernandez@redhat.com>
When split-brain choice is changed from one brick to another brick, inode-invalidate is not called so readv call is served from cache leading to failures in split-brain-resolution.t. Fixed it by calling inode_invaldate() when this happens. updates bz#1193929 Change-Id: I2624614eec38c0303f3e1dc55dfae3d4b864218b Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>