remove-brick in 3.4.0 seems removing wrong bricks, can someone help to
review the environment/steps to see if I did anything stupid?
setup - Ubuntu 12.04LTS on gfs11 and gfs12, with following packages from
ppa, both nodes have 3 xfs partitions sdb1, sdc1, sdd1:
ii glusterfs-client 3.4.0final-ubuntu1~precise1
clustered file-system (client package)
ii glusterfs-common 3.4.0final-ubuntu1~precise1
GlusterFS common libraries and translator modules
ii glusterfs-server 3.4.0final-ubuntu1~precise1
clustered file-system (server package)
step to reproduce the problem:
1. create volume gfs_v0 in replica 2 with gfs11:/sdb1 and gfs12:/sdb1
2. add-brick gfs11:/sdc1 and gfs12:/sdc1
3. add-brick gfs11:/sdd1 and gfs12:/sdd1
4. rebalance to make files distributed to all three pair of disks
5. remove-brick gfs11:/sdd1 and gfs12:/sdd1 start, files on ***/sdc1***
are migrating out
6. remove-brick commit led to data loss in gfs_v0
If between step 5 and 6 I initiate a remove-brick targeting /sdc1, then
after commit I would not lose anything since all data will be migrated
back to /sdb1.
-C.B.
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