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authorDan Lambright <dlambrig@redhat.com>2015-11-04 15:33:22 -0500
committerDan Lambright <dlambrig@redhat.com>2015-11-23 04:05:55 -0800
commit3b52c71b0ab57a9daaf31bf3dc8563da37927a66 (patch)
tree2d47ba199f5cde08b2d9b639670d0ed5c75204b6 /heal
parentf12efd1827077292eba08a109d212a25c62476fe (diff)
cluster/tier: readdirp to cold tier only
It is possible a file would get migrated in the middle of a readdir operation. If there are four subvolumes A,B,C,D, and if readdir reads them in order and reaches subvol B, then, if a file is moved from D to A, it will not be included in the readdir output. This phenonema has pre-existed in DHT migration but is more apparent in tiering. When a file is moved off the hashed subvolume a T file is created. For tiering, we will make the cold subvolume the hashed subvolume. This will ensure the creation of a T file. Readdir will not skip T files in the tier translator. Making the cold subvolume the hashed subvolume ensures the T files created on promotions or creates will be less likely to fill the volume. Creates still put the data on the hot subvolume. Change-Id: Ifde557d3d0e94a4570ca9f115adee3db2ee75407 BUG: 1281598 Signed-off-by: Dan Lambright <dlambrig@redhat.com> Reviewed-on: http://review.gluster.org/12530 Tested-by: Gluster Build System <jenkins@build.gluster.com> Tested-by: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: N Balachandran <nbalacha@redhat.com> Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Diffstat (limited to 'heal')
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