Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Tue Aug 19 17:02:11 2025 Auto Mode Machine = Linux oleg142-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg142-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 8780 18768 221334 228493 64 8 14797 32502 477808 175930 64 16 16571 48151 647135 681644 64 32 14753 64191 913649 929467 64 64 15205 79306 1183548 1232453 128 4 13498 20652 333293 286360 128 8 19010 30440 346859 392505 128 16 16745 54672 600657 780556 128 32 18168 96027 1359835 612303 128 64 12300 53156 1142750 1802755 128 128 30289 118624 766076 2367096 256 4 16968 18895 298360 280657 256 8 20426 32723 416856 427989 256 16 27170 40764 766517 347286 256 32 28783 73544 1325925 787312 256 64 41072 78216 1153561 988889 256 128 37231 112671 1319408 1356067 256 256 28956 118035 1398455 1924938 512 4 15737 17794 277065 280870 512 8 21585 29460 131017 401563 512 16 35489 54254 980673 908101 512 32 48826 81840 1053821 833713 512 64 49564 100708 1187895 1279935 512 128 56152 118352 1467055 1361920 512 256 61842 118411 1650887 1753325 512 512 78393 135021 2107844 2081286 1024 4 17801 18803 355431 243868 1024 8 27595 33481 490920 464782 1024 16 44725 55160 1090423 716089 1024 32 55432 91509 1097388 846331 1024 64 68751 111148 1446211 1159609 1024 128 67448 137268 1359680 1241389 1024 256 78582 132832 1316341 1402756 1024 512 80675 130033 1651398 1738286 2048 4 18438 20872 413737 276534 2048 8 29068 39809 600955 482233 2048 16 45844 55127 884210 623099 2048 32 65061 83619 1012867 1335955 2048 64 82567 101552 1248753 1105837 2048 128 93712 144980 1462662 1477760 2048 256 105937 146212 1617749 1484143 2048 512 121062 135075 1836709 1737163 4096 4 20085 21975 328230 389391 4096 8 34827 42881 647178 533605 4096 16 53996 62044 738417 831318 4096 32 75991 92985 934307 1130566 4096 64 83115 114615 1264917 1042796 4096 128 80755 126685 1482965 1173343 4096 256 86137 129999 2228314 1424201 4096 512 99422 162039 1839227 1666362 8192 4 19167 19626 303395 282492 8192 8 32997 35154 492515 459607 8192 16 47091 54510 798139 721694 8192 32 71483 78003 976189 1007740 8192 64 81501 110683 1498736 1303242 8192 128 97099 122440 1552084 1360361 8192 256 100527 126137 1509468 1522646 8192 512 90471 150265 1969287 1762869 16384 4 19576 20353 316814 288827 16384 8 30455 35559 523131 496467 16384 16 48021 55983 850669 744081 16384 32 68245 81260 1066595 918896 16384 64 73459 103402 1553305 1062522 16384 128 77827 113515 1548405 1328251 16384 256 95831 133069 1743538 1320010 16384 512 97365 138561 1831405 1559049 32768 4 19233 19547 298716 280095 32768 8 30839 33594 487967 459779 32768 16 45102 56222 791973 778334 32768 32 61822 81381 985029 963200 32768 64 78490 101525 1504847 1324383 32768 128 92976 121961 1687261 1368466 32768 256 93015 120092 1586142 1422103 32768 512 94001 132186 1750707 1358591 65536 4 17803 19610 286507 300444 65536 8