== replay-dual test 26: dbench and tar with mds failover ========================================================== 20:14:19 (1763342059) Starting client oleg120-client.virtnet: -o user_xattr,flock 192.168.201.120@tcp:/lustre /mnt/lustre Started clients oleg120-client.virtnet: 192.168.201.120@tcp:/lustre on /mnt/lustre type lustre (rw,checksum,encrypt,flock,lazystatfs,lruresize,nolock,statfs_project,nouser_fid2path,user_xattr,verbose) Started tar loop with pid 65067 Started dbench loop with 65068 striped dir -i0 -c2 -H crush /mnt/lustre2/d26.replay-dual/run_dbench striped dir -i0 -c2 -H fnv_1a_64 /mnt/lustre/d26.replay-dual/run_tar looking for dbench program /usr/bin/dbench found dbench client file /usr/share/dbench/client.txt '/usr/share/dbench/client.txt' -> 'client.txt' running 'dbench 1 -D /mnt/lustre2/d26.replay-dual/run_dbench -t 100' on /mnt/lustre at Sun Nov 16 20:14:23 EST 2025 waiting for dbench pid 65116 dbench version 4.00 - Copyright Andrew Tridgell 1999-2004 Running for 100 seconds with load 'client.txt' and minimum warmup 20 secs failed to create barrier semaphore 0 of 1 processes prepared for launch 0 sec 1 of 1 processes prepared for launch 0 sec releasing clients UUID 1K-blocks Used Available Use% Mounted on lustre-MDT0000_UUID 1414116 1948 1269356 1% /mnt/lustre[MDT:0] lustre-MDT0001_UUID 1414116 1768 1269536 1% /mnt/lustre[MDT:1] lustre-OST0000_UUID 3833116 1564 3605456 1% /mnt/lustre[OST:0] lustre-OST0001_UUID 3833116 26120 3579764 1% /mnt/lustre[OST:1] filesystem_summary: 7666232 27684 7185220 1% /mnt/lustre 1 35 1.11 MB/sec warmup 1 sec latency 56.809 ms 1 121 2.75 MB/sec warmup 2 sec latency 104.363 ms 1 160 2.18 MB/sec warmup 3 sec latency 113.939 ms 1 190 1.89 MB/sec warmup 4 sec latency 366.428 ms 1 239 1.83 MB/sec warmup 5 sec latency 125.956 ms 1 297 1.83 MB/sec warmup 6 sec latency 83.889 ms 1 357 1.82 MB/sec warmup 7 sec latency 87.632 ms test_26 fail mds1 1 times 1 430 1.89 MB/sec warmup 8 sec latency 61.188 ms Failing mds1 on oleg120-server 1 494 1.91 MB/sec warmup 9 sec latency 101.801 ms Stopping /mnt/lustre-mds1 (opts:) on oleg120-server 1 564 1.91 MB/sec warmup 10 sec latency 91.097 ms 1 606 1.90 MB/sec warmup 11 sec latency 651.361 ms 20:14:35 (1763342075) shut down 1 606 1.75 MB/sec warmup 12 sec latency 1651.549 ms facet: mds1 facet_host: oleg120-server facet_failover_host: oleg120-server 1 606 1.61 MB/sec warmup 13 sec latency 2652.357 ms 1 606 1.50 MB/sec warmup 14 sec latency 3654.511 ms 1 606 1.40 MB/sec warmup 15 sec latency 4654.800 ms 1 606 1.31 MB/sec warmup 16 sec latency 5655.085 ms 1 606 1.23 MB/sec warmup 17 sec latency 6662.351 ms 1 606 1.16 MB/sec warmup 18 sec latency 7662.572 ms 1 606 1.10 MB/sec warmup 19 sec latency 8662.906 ms 1 606 0.00 MB/sec execute 1 sec latency 10664.153 ms 1 606 0.00 MB/sec execute 2 sec latency 11664.431 ms Failover mds1 to oleg120-server mount facets: mds1 1 606 0.00 MB/sec execute 3 sec latency 12665.076 ms 1 606 0.00 MB/sec execute 4 sec latency 13665.287 ms 1 606 0.00 MB/sec execute 5 sec latency 14665.999 ms 1 606 0.00 MB/sec execute 6 sec latency 15666.680 ms 1 606 0.00 MB/sec execute 7 sec latency 16670.153 ms 1 606 0.00 MB/sec execute 8 sec latency 17670.531 ms 1 606 0.00 MB/sec execute 9 sec latency 18670.714 ms Start mds1: mount -t lustre -o localrecov /dev/mapper/mds1_flakey /mnt/lustre-mds1 1 606 0.00 MB/sec execute 10 sec latency 19670.988 ms 1 606 0.00 MB/sec execute 11 sec latency 20671.208 ms 1 606 0.00 MB/sec execute 12 sec latency 21672.169 ms 1 606 0.00 MB/sec execute 13 sec latency 22672.479 ms 1 606 0.00 MB/sec execute 14 sec latency 23673.620 ms 1 606 0.00 MB/sec execute 15 sec latency 24673.845 ms 1 606 0.00 MB/sec execute 16 sec latency 25674.357 ms 1 606 0.00 MB/sec execute 17 sec latency 26676.612 ms 1 606 0.00 MB/sec execute 18 sec latency 27676.861 ms 1 606 0.00 MB/sec execute 19 sec latency 28677.095 ms 1 606 0.00 MB/sec execute 20 sec latency 29677.343 ms 1 606 0.00 MB/sec execute 21 sec latency 30677.539 ms 1 606 0.00 MB/sec execute 22 sec latency 31677.802 ms 1 606 0.00 MB/sec execute 23 sec latency 32678.097 ms oleg120-server: oleg120-server.virtnet: executing set_default_debug -1 all 1 606 0.00 MB/sec execute 24 sec latency 33678.553 ms pdsh@oleg120-client: oleg120-server: ssh exited with exit code 1 1 606 0.00 MB/sec execute 25 sec latency 34679.722 ms Started lustre-MDT0000 20:15:09 (1763342109) targets are mounted 20:15:09 (1763342109) facet_failover done 1 606 0.00 MB/sec execute 26 sec latency 35680.452 ms 1 606 0.00 MB/sec execute 27 sec latency 36681.901 ms 1 606 0.00 MB/sec execute 28 sec latency 37683.240 ms 1 661 0.01 MB/sec execute 29 sec latency 37930.667 ms oleg120-client.virtnet: executing wait_import_state_mount (FULL|IDLE) mdc.lustre-MDT0000-mdc-*.mds_server_uuid 1 711 0.01 MB/sec execute 30 sec latency 71.200 ms mdc.lustre-MDT0000-mdc-*.mds_server_uuid in FULL state after 0 sec 1 759 0.01 MB/sec execute 31 sec latency 76.137 ms 1 801 0.02 MB/sec execute 32 sec latency 114.993 ms 1 863 0.02 MB/sec execute 33 sec latency 76.653 ms 1 884 0.02 MB/sec execute 34 sec latency 587.217 ms 1 903 0.02 MB/sec execute 35 sec latency 1025.709 ms 1 952 0.02 MB/sec execute 36 sec latency 63.034 ms UUID 1K-blocks Used Available Use% Mounted on lustre-MDT0000_UUID 1414116 2080 1269224 1% /mnt/lustre[MDT:0] lustre-MDT0001_UUID 1414116 1868 1269436 1% /mnt/lustre[MDT:1] lustre-OST0000_UUID 3833116 13648 3593204 1% /mnt/lustre[OST:0] lustre-OST0001_UUID 3833116 40892 3556792 2% /mnt/lustre[OST:1] filesystem_summary: 7666232 54540 7149996 1% /mnt/lustre 1 990 0.03 MB/sec execute 37 sec latency 90.157 ms 1 1064 0.05 MB/sec execute 38 sec latency 91.082 ms 1 1119 0.05 MB/sec execute 39 sec latency 75.128 ms 1 1168 0.05 MB/sec execute 40 sec latency 101.554 ms 1 1223 0.05 MB/sec execute 41 sec latency 67.780 ms 1 1262 0.05 MB/sec execute 42 sec latency 121.239 ms 1 1396 0.12 MB/sec execute 43 sec latency 121.688 ms 1 1459 0.12 MB/sec execute 44 sec latency 79.617 ms test_26 fail mds2 2 times 1 1504 0.11 MB/sec execute 45 sec latency 204.009 ms 1 1570 0.11 MB/sec execute 46 sec latency 55.324 ms Failing mds2 on oleg120-server Stopping /mnt/lustre-mds2 (opts:) on oleg120-server 1 1621 0.11 MB/sec execute 47 sec latency 70.058 ms 1 1662 0.11 MB/sec execute 48 sec latency 135.071 ms 1 1721 0.11 MB/sec execute 49 sec latency 115.452 ms 20:15:33 (1763342133) shut down facet: mds2 facet_host: oleg120-server facet_failover_host: oleg120-server 1 1805 0.11 MB/sec execute 50 sec latency 91.787 ms 1 1877 0.11 MB/sec execute 51 sec latency 62.841 ms 1 1973 0.11 MB/sec execute 52 sec latency 66.806 ms 1 2012 0.10 MB/sec execute 53 sec latency 88.072 ms 1 2083 0.10 MB/sec execute 54 sec latency 81.935 ms 1 2156 0.10 MB/sec execute 55 sec latency 81.583 ms 1 2209 0.10 MB/sec execute 56 sec latency 95.659 ms 1 2259 0.10 MB/sec execute 57 sec latency 523.331 ms 1 2259 0.10 MB/sec execute 58 sec latency 1523.545 ms 1 2259 0.10 MB/sec execute 59 sec latency 2525.954 ms Failover mds2 to oleg120-server mount facets: mds2 1 2259 0.10 MB/sec execute 60 sec latency 3526.307 ms 1 2259 0.10 MB/sec execute 61 sec latency 4527.170 ms 1 2259 0.09 MB/sec execute 62 sec latency 5527.401 ms 1 2259 0.09 MB/sec execute 63 sec latency 6527.849 ms 1 2259 0.09 MB/sec execute 64 sec latency 7528.096 ms 1 2259 0.09 MB/sec execute 65 sec latency 8531.044 ms 1 2259 0.09 MB/sec execute 66 sec latency 9537.713 ms 1 2259 0.09 MB/sec execute 67 sec latency 10538.492 ms Start mds2: mount -t lustre -o localrecov /dev/mapper/mds2_flakey /mnt/lustre-mds2 1 2259 0.09 MB/sec execute 68 sec latency 11539.807 ms 1 2259 0.08 MB/sec execute 69 sec latency 12540.025 ms 1 2259 0.08 MB/sec execute 70 sec latency 13550.407 ms 1 2259 0.08 MB/sec execute 71 sec latency 14552.477 ms 1 2259 0.08 MB/sec execute 72 sec latency 15552.928 ms oleg120-server: oleg120-server.virtnet: executing set_default_debug -1 all 1 2259 0.08 MB/sec execute 73 sec latency 16553.243 ms pdsh@oleg120-client: oleg120-server: ssh exited with exit code 1 1 2259 0.08 MB/sec execute 74 sec latency 17553.470 ms Started lustre-MDT0001 20:15:58 (1763342158) targets are mounted 20:15:58 (1763342158) facet_failover done 1 2259 0.08 MB/sec execute 75 sec latency 18553.757 ms 1 2259 0.08 MB/sec execute 76 sec latency 19554.073 ms 1 2305 0.09 MB/sec execute 77 sec latency 20017.173 ms 1 2373 0.09 MB/sec execute 78 sec latency 70.168 ms oleg120-client.virtnet: executing wait_import_state_mount (FULL|IDLE) mdc.lustre-MDT0001-mdc-*.mds_server_uuid 1 2417 0.09 MB/sec execute 79 sec latency 89.089 ms mdc.lustre-MDT0001-mdc-*.mds_server_uuid in FULL state after 0 sec 1 2466 0.10 MB/sec execute 80 sec latency 85.718 ms 1 2558 0.10 MB/sec execute 81 sec latency 95.371 ms 1 2597 0.10 MB/sec execute 82 sec latency 88.150 ms 1 2770 0.13 MB/sec execute 83 sec latency 66.660 ms 1 2917 0.15 MB/sec execute 84 sec latency 81.323 ms 1 3000 0.15 MB/sec execute 85 sec latency 81.515 ms UUID 1K-blocks Used Available Use% Mounted on lustre-MDT0000_UUID 1414116 2336 1268968 1% /mnt/lustre[MDT:0] lustre-MDT0001_UUID 1414116 2132 1269172 1% /mnt/lustre[MDT:1] lustre-OST0000_UUID 3833116 14416 3590276 1% /mnt/lustre[OST:0] lustre-OST0001_UUID 3833116 54728 3551392 2% /mnt/lustre[OST:1] filesystem_summary: 7666232 69144 7141668 1% /mnt/lustre 1 3197 0.15 MB/sec execute 86 sec latency 73.946 ms 1 3312 0.17 MB/sec execute 87 sec latency 76.111 ms 1 3399 0.16 MB/sec execute 88 sec latency 71.821 ms 1 3556 0.20 MB/sec execute 89 sec latency 66.075 ms 1 3627 0.20 MB/sec execute 90 sec latency 77.323 ms 1 3691 0.20 MB/sec execute 91 sec latency 80.641 ms 1 3754 0.20 MB/sec execute 92 sec latency 88.794 ms test_26 fail mds1 3 times 1 3797 0.20 MB/sec execute 93 sec latency 115.957 ms 1 3836 0.20 MB/sec execute 94 sec latency 136.833 ms Failing mds1 on oleg120-server 1 3878 0.20 MB/sec execute 95 sec latency 133.977 ms Stopping /mnt/lustre-mds1 (opts:) on oleg120-server 1 3926 0.20 MB/sec execute 96 sec latency 79.943 ms 1 3963 0.20 MB/sec execute 97 sec latency 96.811 ms 1 4014 0.19 MB/sec execute 98 sec latency 59.229 ms 1 4075 0.19 MB/sec execute 99 sec latency 56.876 ms 1 cleanup 100 sec 1 cleanup 101 sec 1 cleanup 102 sec 1 cleanup 103 sec 20:16:27 (1763342187) shut down 1 cleanup 104 sec facet: mds1 facet_host: oleg120-server facet_failover_host: oleg120-server 1 cleanup 105 sec 1 cleanup 106 sec 1 cleanup 107 sec 1 cleanup 108 sec 1 cleanup 109 sec 1 cleanup 110 sec 1 cleanup 111 sec 1 cleanup 112 sec 1 cleanup 113 sec 1 cleanup 114 sec Failover mds1 to oleg120-server mount facets: mds1 1 cleanup 115 sec 1 cleanup 116 sec 1 cleanup 117 sec 1 cleanup 118 sec 1 cleanup 119 sec 1 cleanup 120 sec 1 cleanup 121 sec 1 cleanup 122 sec Start mds1: mount -t lustre -o localrecov /dev/mapper/mds1_flakey /mnt/lustre-mds1 1 cleanup 123 sec 1 cleanup 124 sec 1 cleanup 125 sec 1 cleanup 126 sec 1 cleanup 127 sec 1 cleanup 128 sec 1 cleanup 129 sec 1 cleanup 130 sec 1 cleanup 131 sec 1 cleanup 132 sec 1 cleanup 133 sec 1 cleanup 134 sec oleg120-server: oleg120-server.virtnet: executing set_default_debug -1 all 1 cleanup 135 sec pdsh@oleg120-client: oleg120-server: ssh exited with exit code 1 Started lustre-MDT0000 1 cleanup 136 sec 20:16:59 (1763342219) targets are mounted 20:16:59 (1763342219) facet_failover done 1 cleanup 137 sec 1 cleanup 138 sec 1 cleanup 139 sec oleg120-client.virtnet: executing wait_import_state_mount (FULL|IDLE) mdc.lustre-MDT0000-mdc-*.mds_server_uuid 1 cleanup 140 sec 0 cleanup 141 sec Operation Count AvgLat MaxLat ---------------------------------------- NTCreateX 613 72.185 20017.157 Close 448 9.908 57.071 Rename 26 71.066 115.417 Unlink 96 21.628 45.517 Qpathinfo 534 155.094 38150.747 Qfileinfo 97 1.329 9.620 Qfsinfo 98 2.970 45.762 Sfileinfo 50 50.091 121.217 Find 204 7.953 47.193 WriteX 303 9.424 83.200 ReadX 962 1.139 76.122 LockX 2 12.729 16.824 UnlockX 2 12.558 15.988 Flush 43 40.356 77.894 Throughput 0.192812 MB/sec 1 clients 1 procs max_latency=37930.667 ms stopping dbench on /mnt/lustre at Sun Nov 16 20:17:04 EST 2025 with return code 0 clean dbench files on /mnt/lustre /mnt/lustre /mnt/lustre mdc.lustre-MDT0000-mdc-*.mds_server_uuid in FULL state after 0 sec removed 'client.txt' /mnt/lustre dbench successfully finished striped dir -i0 -c2 -H all_char /mnt/lustre2/d26.replay-dual/run_dbench looking for dbench program /usr/bin/dbench found dbench client file /usr/share/dbench/client.txt '/usr/share/dbench/client.txt' -> 'client.txt' running 'dbench 1 -D /mnt/lustre2/d26.replay-dual/run_dbench -t 100' on /mnt/lustre at Sun Nov 16 20:17:10 EST 2025 waiting for dbench pid 68273 dbench version 4.00 - Copyright Andrew Tridgell 1999-2004 Running for 100 seconds with load 'client.txt' and minimum warmup 20 secs 0 of 1 processes prepared for launch 0 sec 1 of 1 processes prepared for launch 0 sec releasing clients UUID 1K-blocks Used Available Use% Mounted on lustre-MDT0000_UUID 1414116 2660 1268644 1% /mnt/lustre[MDT:0] lustre-MDT0001_UUID 1414116 2392 1268912 1% /mnt/lustre[MDT:1] lustre-OST0000_UUID 3833116 2424 3604044 1% /mnt/lustre[OST:0] lustre-OST0001_UUID 3833116 38028 3558988 2% /mnt/lustre[OST:1] filesystem_summary: 7666232 40452 7163032 1% /mnt/lustre 1 13 0.00 MB/sec warmup 1 sec latency 0.306 ms 1 72 1.57 MB/sec warmup 2 sec latency 96.684 ms 1 125 1.85 MB/sec warmup 3 sec latency 180.470 ms 1 155 1.63 MB/sec warmup 4 sec latency 177.496 ms 1 184 1.48 MB/sec warmup 5 sec latency 173.238 ms 1 196 1.31 MB/sec warmup 6 sec latency 618.745 ms 1 215 1.19 MB/sec warmup 7 sec latency 1160.333 ms 1 268 1.26 MB/sec warmup 8 sec latency 98.468 ms 1 315 1.27 MB/sec warmup 9 sec latency 108.066 ms test_26 fail mds2 4 times 1 357 1.28 MB/sec warmup 10 sec latency 117.262 ms Failing mds2 on oleg120-server 1 405 1.30 MB/sec warmup 11 sec latency 163.249 ms Stopping /mnt/lustre-mds2 (opts:) on oleg120-server 1 461 1.35 MB/sec warmup 12 sec latency 110.293 ms 1 493 1.32 MB/sec warmup 13 sec latency 413.922 ms 1 493 1.23 MB/sec warmup 14 sec latency 1414.807 ms 20:17:24 (1763342244) shut down facet: mds2 facet_host: oleg120-server facet_failover_host: oleg120-server 1 493 1.14 MB/sec warmup 15 sec latency 2415.865 ms 1 493 1.07 MB/sec warmup 16 sec latency 3416.118 ms 1 493 1.01 MB/sec warmup 17 sec latency 4416.526 ms 1 493 0.95 MB/sec warmup 18 sec latency 5416.771 ms 1 493 0.90 MB/sec warmup 19 sec latency 6417.043 ms 1 493 0.00 MB/sec execute 1 sec latency 8418.876 ms 1 493 0.00 MB/sec execute 2 sec latency 9419.158 ms 1 493 0.00 MB/sec execute 3 sec latency 10419.432 ms 1 493 0.00 MB/sec execute 4 sec latency 11419.741 ms Failover mds2 to oleg120-server mount facets: mds2 1 493 0.00 MB/sec execute 5 sec latency 12420.416 ms 1 493 0.00 MB/sec execute 6 sec latency 13420.632 ms 1 493 0.00 MB/sec execute 7 sec latency 14420.842 ms 1 493 0.00 MB/sec execute 8 sec latency 15421.097 ms 1 493 0.00 MB/sec execute 9 sec latency 16423.970 ms 1 493 0.00 MB/sec execute 10 sec latency 17427.780 ms 1 493 0.00 MB/sec execute 11 sec latency 18428.029 ms 1 493 0.00 MB/sec execute 12 sec latency 19428.270 ms 1 493 0.00 MB/sec execute 13 sec latency 20428.556 ms 1 493 0.00 MB/sec execute 14 sec latency 21432.170 ms Start mds2: mount -t lustre -o localrecov /dev/mapper/mds2_flakey /mnt/lustre-mds2 1 493 0.00 MB/sec execute 15 sec latency 22432.486 ms 1 493 0.00 MB/sec execute 16 sec latency 23433.030 ms 1 493 0.00 MB/sec execute 17 sec latency 24433.910 ms 1 493 0.00 MB/sec execute 18 sec latency 25434.089 ms 1 493 0.00 MB/sec execute 19 sec latency 26435.137 ms oleg120-server: oleg120-server.virtnet: executing set_default_debug -1 all 1 493 0.00 MB/sec execute 20 sec latency 27437.014 ms pdsh@oleg120-client: oleg120-server: ssh exited with exit code 1 1 493 0.00 MB/sec execute 21 sec latency 28439.050 ms Started lustre-MDT0001 20:17:52 (1763342272) targets are mounted 20:17:52 (1763342272) facet_failover done 1 493 0.00 MB/sec execute 22 sec latency 29441.546 ms 1 493 0.00 MB/sec execute 23 sec latency 30444.876 ms 1 495 0.00 MB/sec execute 24 sec latency 31412.998 ms 1 541 0.08 MB/sec execute 25 sec latency 144.077 ms oleg120-client.virtnet: executing wait_import_state_mount (FULL|IDLE) mdc.lustre-MDT0001-mdc-*.mds_server_uuid 1 639 0.15 MB/sec execute 26 sec latency 90.959 ms 1 676 0.15 MB/sec execute 27 sec latency 98.001 ms mdc.lustre-MDT0001-mdc-*.mds_server_uuid in FULL state after 0 sec 1 710 0.14 MB/sec execute 28 sec latency 148.986 ms 1 738 0.14 MB/sec execute 29 sec latency 116.514 ms 1 778 0.14 MB/sec execute 30 sec latency 111.963 ms 1 819 0.14 MB/sec execute 31 sec latency 89.632 ms 1 878 0.14 MB/sec execute 32 sec latency 77.016 ms 1 885 0.14 MB/sec execute 33 sec latency 881.806 ms 1 914 0.13 MB/sec execute 34 sec latency 125.242 ms 1 959 0.13 MB/sec execute 35 sec latency 87.709 ms 1 1022 0.15 MB/sec execute 36 sec latency 69.665 ms 1 1095 0.15 MB/sec execute 37 sec latency 58.505 ms 1 1163 0.15 MB/sec execute 38 sec latency 71.509 ms 1 1221 0.15 MB/sec execute 39 sec latency 118.392 ms 1 1268 0.15 MB/sec execute 40 sec latency 93.919 ms 1 1417 0.21 MB/sec execute 41 sec latency 84.988 ms 1 1467 0.21 MB/sec execute 42 sec latency 74.527 ms tar: Unexpected EOF in archive tar: Unexpected EOF in archive 1 1511 0.21 MB/sec execute 43 sec latency 209.463 ms 1 1577 0.20 MB/sec execute 44 sec latency 52.136 ms 1 1632 0.20 MB/sec execute 45 sec latency 76.445 ms 1 1686 0.20 MB/sec execute 46 sec latency 126.413 ms 1 1770 0.19 MB/sec execute 47 sec latency 73.187 ms 1 1825 0.19 MB/sec execute 48 sec latency 93.236 ms 1 1877 0.19 MB/sec execute 49 sec latency 160.665 ms 1 1954 0.18 MB/sec execute 50 sec latency 136.200 ms 1 2006 0.18 MB/sec execute 51 sec latency 81.377 ms 1 2069 0.18 MB/sec execute 52 sec latency 66.847 ms tar: Error is not recoverable: exiting now dbench killed by signal 15 stopping dbench on /mnt/lustre at Sun Nov 16 20:18:23 EST 2025 with return code 0 1 2139 0.18 MB/sec execute 53 sec latency 91.949 ms 68273 pts/0 S+ 0:00 dbench -c client.txt 1 -D /mnt/lustre2/d26.replay-dual/run_dbench -t 100 killed dbench main pid 68273 clean dbench files on /mnt/lustre /mnt/lustre /mnt/lustre removed 'client.txt' /mnt/lustre dbench successfully finished