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 Jun 16 09:38:56 2026 Auto Mode Machine = Linux oleg257-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-oleg257-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 5709 11976 603489 615952 64 8 8222 29277 866463 681644 64 16 9787 38647 874936 1087638 64 32 11147 67297 1255511 1033216 64 64 6381 64842 1232453 1310683 128 4 8305 13442 516318 723735 128 8 9873 19202 824932 723735 128 16 22396 40506 1440082 985435 128 32 15575 64166 1206978 1622919 128 64 12726 94257 1294270 1266785 128 128 18577 108463 2132084 2326073 256 4 12618 15374 687940 538809 256 8 19945 32295 762164 744204 256 16 21271 41117 1662639 838988 256 32 17341 54923 1071806 1094754 256 64 12362 93671 1327564 1036624 256 128 30213 131219 1407621 1237306 256 256 19202 112037 962301 2639446 512 4 11770 14015 628322 608730 512 8 16017 19888 799865 617482 512 16 18890 42314 1135750 1060063 512 32 20766 64572 1075459 1073309 512 64 40043 93703 1279935 1645826 512 128 14601 54473 1640796 2383958 512 256 25437 110105 1267097 1242896 512 512 36225 97858 1309596 1999881 1024 4 14289 12549 365441 185641 1024 8 16233 27530 438942 748538 1024 16 17497 34357 1427940 709114 1024 32 42751 58945 535545 1518833 1024 64 20737 64370 1448650 1120288 1024 128 38993 62764 1973059 728354 1024 256 32285 52488 1620249 1406431 1024 512 33455 66601 1709231 1570483 2048 4 11321 12323 515484 528650 2048 8 19324 26837 949079 851516 2048 16 25396 36996 1145354 1062741 2048 32 36848 68986 1057899 434915 2048 64 45841 60284 1413328 1001413 2048 128 35473 70225 845898 397060 2048 256 56373 126922 1487227 1463909 2048 512 57328 122731 2149199 1481839 4096 4 12967 15435 614448 443628 4096 8 22778 18735 619210 740007 4096 16 30595 34336 907988 855494 4096 32 45144 40583 1641680 1020194 4096 64 46104 107800 1120026 929002 4096 128 33879 93712 1157064 651596 4096 256 59819 103796 838295 705602 4096 512 74966 91447 747737 987416 8192 4 14130 14302 345769 361583 8192 8 17738 24508 539765 893718 8192 16 38678 40650 633268 932730 8192 32 40587 55292 828069 979082 8192 64 43689 58345 1159047 1095172 8192 128 49070 70044 1798392 1278606 8192 256 42461 73939 1409236 1215249 8192 512 58452 80014 1595618 1381251 16384 4 13257 13426 669912 557521 16384 8