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: Fri Aug 28 04:53:27 2026 Auto Mode Machine = Linux oleg336-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-oleg336-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 3388 7111 576282 571375 64 8 3532 20479 789967 681644 64 16 5404 24853 1124074 1105556 64 32 2750 69564 1070292 987600 64 64 4150 54462 1330167 1734015 128 4 3366 5480 643108 261785 128 8 5953 26589 826202 789741 128 16 11758 26734 940549 757430 128 32 8261 33577 1363288 824932 128 64 5309 75831 1391557 1391557 128 128 10663 93502 1521718 1240443 256 4 8723 5888 408297 643033 256 8 4788 7302 965763 794889 256 16 12439 15349 1248819 156298 256 32 11515 46101 792543 323240 256 64 19144 25605 1332507 1340826 256 128 18507 86754 1610276 1558845 256 256 22364 62558 1437779 341759 512 4 6244 10124 395936 556515 512 8 7352 21440 899731 200478 512 16 24227 45515 111379 944860 512 32 27739 56807 1376763 1045103 512 64 9152 19127 1411141 600223 512 128 25052 24338 561315 373683 512 256 37777 42978 1723770 1326585 512 512 23308 91480 1418599 956645 1024 4 10357 11382 320285 426138 1024 8 18303 16340 788240 405690 1024 16 19375 29897 841357 838565 1024 32 17875 15205 260952 367537 1024 64 46532 62015 706315 775152 1024 128 19262 54300 1253344 925080 1024 256 27135 63650 366909 1400926 1024 512 27615 70075 862650 661904 2048 4 8270 12517 217434 279931 2048 8 14985 15819 407573 538965 2048 16 16649 39788 443287 727294 2048 32 19163 42503 1372675 1166824 2048 64 24024 56149 1645012 752657 2048 128 31226 48023 824148 976705 2048 256 22433 76437 851179 1003871 2048 512 28128 52477 240178 449810 4096 4 7415 12766 301349 349136 4096 8 14830 14129 516256 322900 4096 16 13805 20807 304284 571029 4096 32 18338 33633 714612 773421 4096 64 17846 35846 1525498 780342 4096 128 26795 42673 1509813 678595 4096 256 26616 53318 1326855 571029 4096 512 42211 61066 991748 821499 8192 4 2349 11758 412839 344967 8192 8 8347 14569 615624 377269 8192 16 15562 23204 428768 468513 8192 32 28566 37883 472462 353027 8192 64 28153 42459 582064 647224 8192 128 27089 43456 593618 563951 8192 256 31396 49543 675630 563608 8192 512 21950 51761 615701 624633 16384 4 7208 6561 466540 260381 16384 8 12191 21301 858030 548182 16384 16 23398 27300 633710 337842 16384 32 19484 29242 868297 724737 16384 64 26026 40961 1073091 679524 16384 128 40429 73312 424367 1071551 16384 256 35806 63825 681417 683545 16384 512 47704 50035 1021322 632416 32768 4 6354 7892 407816 332332 32768 8 15272 15726 659502 560070 32768 16 30867 30757 1137186 480441 32768 32 29626 41188 763037 837864 32768 64 32125 36760 747650 765050 32768 128 39686 54447 1279658 935641 32768 256 47645 58424 990873 600299 32768 512 41937 60666 669745 838334 65536 4