Dear All, I recently added 3 servers (each one with 12 bricks) to an existing Gluster Distributed Disperse Volume. Volume extension has been completed without error and I already executed the rebalance procedure with fix-layout option with no problem. I just launched the rebalance procedure without fix-layout option, but, as you can see in the output below, I noticed that some failures have been detected. [root@s01 glusterfs]# gluster v rebalance tier2 status Node Rebalanced-files size scanned failures skipped status run time in h:m:s --------- ----------- ----------- ----------- ----------- ----------- ------------ -------------- localhost 71176 3.2MB 2137557 1530391 8128 in progress 13:59:05 s02-stg 0 0Bytes 0 0 0 completed 11:53:28 s03-stg 0 0Bytes 0 0 0 completed 11:53:32 s04-stg 0 0Bytes 0 0 0 completed 0:00:06 s05-stg 15 0Bytes 17055 0 18 completed 10:48:01 s06-stg 0 0Bytes 0 0 0 completed 0:00:06 Estimated time left for rebalance to complete : 0:46:53 volume rebalance: tier2: success In the volume rebalance log file, I detected a lot of error messages similar to the following ones: [2018-09-12 13:15:50.756703] E [MSGID: 0] [dht-rebalance.c:1696:dht_migrate_file] 0-tier2-dht: Create dst failed on - tier2-disperse-6 for file - /CSP/sp1/CESM/archive/sps_200508_003/atm/hist/postproc/sps_200508_003.cam.h0.2005-12_grid.nc [2018-09-12 13:15:50.757025] E [MSGID: 109023] [dht-rebalance.c:2733:gf_defrag_migrate_single_file] 0-tier2-dht: migrate-data failed for /CSP/sp1/CESM/archive/sps_200508_003/atm/hist/postproc/sps_200508_003.cam.h0.2005-12_grid.nc [2018-09-12 13:15:50.759183] E [MSGID: 109023] [dht-rebalance.c:844:__dht_rebalance_create_dst_file] 0-tier2-dht: fallocate failed for /CSP/sp1/CESM/archive/sps_200508_003/atm/hist/postproc/sps_200508_003.cam.h0.2005-09_grid.nc on tier2-disperse-9 (Operation not supported) [2018-09-12 13:15:50.759206] E [MSGID: 0] [dht-rebalance.c:1696:dht_migrate_file] 0-tier2-dht: Create dst failed on - tier2-disperse-9 for file - /CSP/sp1/CESM/archive/sps_200508_003/atm/hist/postproc/sps_200508_003.cam.h0.2005-09_grid.nc [2018-09-12 13:15:50.759536] E [MSGID: 109023] [dht-rebalance.c:2733:gf_defrag_migrate_single_file] 0-tier2-dht: migrate-data failed for /CSP/sp1/CESM/archive/sps_200508_003/atm/hist/postproc/sps_200508_003.cam.h0.2005-09_grid.nc [2018-09-12 13:15:50.777219] E [MSGID: 109023] [dht-rebalance.c:844:__dht_rebalance_create_dst_file] 0-tier2-dht: fallocate failed for /CSP/sp1/CESM/archive/sps_200508_003/atm/hist/postproc/sps_200508_003.cam.h0.2006-01_grid.nc on tier2-disperse-10 (Operation not supported) [2018-09-12 13:15:50.777241] E [MSGID: 0] [dht-rebalance.c:1696:dht_migrate_file] 0-tier2-dht: Create dst failed on - tier2-disperse-10 for file - /CSP/sp1/CESM/archive/sps_200508_003/atm/hist/postproc/sps_200508_003.cam.h0.2006-01_grid.nc [2018-09-12 13:15:50.777676] E [MSGID: 109023] [dht-rebalance.c:2733:gf_defrag_migrate_single_file] 0-tier2-dht: migrate-data failed for /CSP/sp1/CESM/archive/sps_200508_003/atm/hist/postproc/sps_200508_003.cam.h0.2006-01_grid.nc Could you please help me to understand what is happening and how to solve it? Our Gluster implementation is based on Gluster v.3.10.5 Thank you in advance, Mauro
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