From: Robert Mueller Subject: Re: fallocate creating fragmented files Date: Thu, 31 Jan 2013 08:21:50 +1100 Message-ID: <1359580910.30605.140661184656041.31047642@webmail.messagingengine.com> References: <1359524809.5789.140661184325217.261ED7C8@webmail.messagingengine.com> <5108B833.6010004@redhat.com> <1359527713.648.140661184334613.06CF38D4@webmail.messagingengine.com> <510942C3.1070503@redhat.com> <20130130201412.GA32724@thunk.org> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: Bron Gondwana , linux-ext4@vger.kernel.org To: "Theodore Ts'o" , Eric Sandeen Return-path: Received: from out5-smtp.messagingengine.com ([66.111.4.29]:51158 "EHLO out5-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755476Ab3A3VVv (ORCPT ); Wed, 30 Jan 2013 16:21:51 -0500 In-Reply-To: <20130130201412.GA32724@thunk.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: > Can you show us the the inode number for each of the test files along > with the filefrag -v output? What I suspect is going on is that the > kernel is trying too hard to start the block allocation in the same > block group which was used for the inode number. Since Bron isn't around right now and I know where the files are... [robm@imap14 conf]$ ls -i testfile 15238691 testfile [robm@imap14 conf]$ ls -i testfile2 15238707 testfile2 [robm@imap14 conf]$ filefrag -v testfile Filesystem type is: ef53 File size of testfile is 20971520 (20480 blocks, blocksize 1024) ext logical physical expected length flags 0 0 13545000 48 unwritten 1 48 13545134 13545048 48 unwritten 2 96 13545357 13545182 48 unwritten 3 144 13545431 13545405 48 unwritten 4 192 13546319 13545479 48 unwritten 5 240 13546936 13546367 48 unwritten 6 288 13542294 13546984 47 unwritten 7 335 13542391 13542341 47 unwritten 8 382 13542478 13542438 47 unwritten 9 429 13542719 13542525 47 unwritten 10 476 13542927 13542766 47 unwritten 11 523 13543448 13542974 47 unwritten 12 570 13543595 13543495 47 unwritten 13 617 13543745 13543642 47 unwritten 14 664 13543994 13543792 47 unwritten 15 711 13544115 13544041 47 unwritten 16 758 13544396 13544162 47 unwritten 17 805 13544471 13544443 47 unwritten 18 852 13544608 13544518 47 unwritten 19 899 13547571 13544655 48 unwritten 20 947 13545648 13547619 47 unwritten 21 994 13545706 13545695 47 unwritten 22 1041 13544043 13545753 46 unwritten 23 1087 13547656 13544089 88 unwritten 24 1175 13544923 13547744 46 unwritten 25 1221 13547756 13544969 47 unwritten 26 1268 13545598 13547803 46 unwritten 27 1314 13546485 13545644 46 unwritten 28 1360 13546677 13546531 46 unwritten 29 1406 13547836 13546723 83 unwritten 30 1489 13547921 13547919 51 unwritten 31 1540 13547973 13547972 55 unwritten 32 1595 13546828 13548028 46 unwritten 33 1641 13548107 13546874 68 unwritten 34 1709 13548176 13548175 59 unwritten 35 1768 13546883 13548235 46 unwritten 36 1814 13542536 13546929 45 unwritten 37 1859 13546182 13542581 44 unwritten 38 1903 13548255 13546226 52 unwritten 39 1955 13541526 13548307 43 unwritten 40 1998 13545077 13541569 43 unwritten 41 2041 13545183 13545120 43 unwritten 42 2084 13541687 13545226 42 unwritten 43 2126 13543819 13541729 42 unwritten 44 2168 13548400 13543861 132 unwritten 45 2300 13548605 13548532 73 unwritten 46 2373 13548679 13548678 43 unwritten 47 2416 13545815 13548722 42 unwritten 48 2458 13548728 13545857 104 unwritten 49 2562 13548833 13548832 62 unwritten 50 2624 13548896 13548895 45 unwritten 51 2669 13548942 13548941 66 unwritten 52 2735 13546442 13549008 40 unwritten 53 2775 13542342 13546482 38 unwritten 54 2813 13544286 13542380 38 unwritten 55 2851 13549069 13544324 152 unwritten 56 3003 13541775 13549221 37 unwritten 57 3040 13545858 13541812 37 unwritten 58 3077 13549016 13545895 37 unwritten 59 3114 13544780 13549053 36 unwritten 60 3150 13547004 13544816 36 unwritten 61 3186 13546147 13547040 34 unwritten 62 3220 13549304 13546181 60 unwritten 63 3280 13549365 13549364 76 unwritten 64 3356 13548308 13549441 34 unwritten 65 3390 13542234 13548342 32 unwritten 66 3422 13548343 13542266 32 unwritten 67 3454 13542009 13548375 31 unwritten 68 3485 13542445 13542040 31 unwritten 69 3516 13542662 13542476 31 unwritten 70 3547 13545965 13542693 31 unwritten 71 3578 13549222 13545996 31 unwritten 72 3609 13543892 13549253 30 unwritten 73 3639 13544749 13543922 30 unwritten 74 3669 13545323 13544779 30 unwritten 75 3699 13546759 13545353 30 unwritten 76 3729 13546645 13546789 29 unwritten 77 3758 13547328 13546674 29 unwritten 78 3787 13544257 13547357 28 unwritten 79 3815 13549893 13544285 33 unwritten 80 3848 13550421 13549926 60 unwritten 81 3908 13554246 13550481 59 unwritten 82 3967 13550131 13554305 56 unwritten 83 4023 13551262 13550187 56 unwritten 84 4079 13551565 13551318 56 unwritten 85 4135 13551661 13551621 56 unwritten 86 4191 13553303 13551717 56 unwritten 87 4247 13555017 13553359 56 unwritten 88 4303 13550960 13555073 55 unwritten 89 4358 13554082 13551015 55 unwritten 90 4413 13554384 13554137 55 unwritten 91 4468 13554916 13554439 55 unwritten 92 4523 13551128 13554971 54 unwritten 93 4577 13552389 13551182 52 unwritten 94 4629 13555468 13552441 51 unwritten 95 4680 13554742 13555519 50 unwritten 96 4730 13555208 13554792 50 unwritten 97 4780 13554673 13555258 49 unwritten 98 4829 13555132 13554722 48 unwritten 99 4877 13551757 13555180 47 unwritten 100 4924 13552116 13551804 47 unwritten 101 4971 13552595 13552163 47 unwritten 102 5018 13554562 13552642 47 unwritten 103 5065 13550644 13554609 46 unwritten 104 5111 13550702 13550690 46 unwritten 105 5157 13552001 13550748 46 unwritten 106 5203 13552535 13552047 46 unwritten 107 5249 13552971 13552581 46 unwritten 108 5295 13553841 13553017 46 unwritten 109 5341 13557058 13553887 123 unwritten 110 5464 13550578 13557181 45 unwritten 111 5509 13551044 13550623 43 unwritten 112 5552 13557376 13551087 111 unwritten 113 5663 13557488 13557487 71 unwritten 114 5734 13551325 13557559 43 unwritten 115 5777 13552774 13551368 43 unwritten 116 5820 13553935 13552817 43 unwritten 117 5863 13557599 13553978 162 unwritten 118 6025 13552493 13557761 41 unwritten 119 6066 13550194 13552534 39 unwritten 120 6105 13550520 13550233 39 unwritten 121 6144 13553029 13550559 39 unwritten 122 6183 13552643 13553068 38 unwritten 123 6221 13555841 13552681 38 unwritten 124 6259 13555681 13555879 37 unwritten 125 6296 13551425 13555718 36 unwritten 126 6332 13550385 13551461 35 unwritten 127 6367 13552288 13550420 35 unwritten 128 6402 13552457 13552323 35 unwritten 129 6437 13555329 13552492 35 unwritten 130 6472 13550340 13555364 33 unwritten 131 6505 13550901 13550373 33 unwritten 132 6538 13552164 13550934 33 unwritten 133 6571 13551528 13552197 32 unwritten 134 6603 13551622 13551560 31 unwritten 135 6634 13557026 13551653 31 unwritten 136 6665 13552696 13557057 29 unwritten 137 6694 13549661 13552725 26 unwritten 138 6720 13552070 13549687 26 unwritten 139 6746 13557336 13552096 26 unwritten 140 6772 13549741 13557362 24 unwritten 141 6796 13551016 13549765 24 unwritten 142 6820 13551805 13551040 24 unwritten 143 6844 13551878 13551829 24 unwritten 144 6868 13553981 13551902 24 unwritten 145 6892 13554972 13554005 24 unwritten 146 6916 13556993 13554996 23 unwritten 147 6939 13554631 13557016 22 unwritten 148 6961 13551201 13554653 21 unwritten 149 6982 13553888 13551222 21 unwritten 150 7003 13554508 13553909 21 unwritten 151 7024 13557560 13554529 21 unwritten 152 7045 13554610 13557581 20 unwritten 153 7065 13555188 13554630 19 unwritten 154 7084 13553910 13555207 18 unwritten 155 7102 13549803 13553928 17 unwritten 156 7119 13550307 13549820 17 unwritten 157 7136 13550938 13550324 17 unwritten 158 7153 13551381 13550955 17 unwritten 159 7170 13553806 13551398 17 unwritten 160 7187 13556111 13553823 17 unwritten 161 7204 13556460 13556128 17 unwritten 162 7221 13549602 13556477 16 unwritten 163 7237 13549786 13549618 16 unwritten 164 7253 13550482 13549802 16 unwritten 165 7269 13552097 13550498 16 unwritten 166 7285 13556478 13552113 15 unwritten 167 7300 13556776 13556493 15 unwritten 168 7315 13549622 13556791 13 unwritten 169 7328 13549993 13549635 13 unwritten 170 7341 13550234 13550006 13 unwritten 171 7354 13550499 13550247 13 unwritten 172 7367 13551950 13550512 13 unwritten 173 7380 13554362 13551963 13 unwritten 174 7393 13557585 13554375 13 unwritten 175 7406 13550091 13557598 12 unwritten 176 7418 13550248 13550103 12 unwritten 177 7430 13551484 13550260 12 unwritten 178 7442 13551981 13551496 12 unwritten 179 7454 13552582 13551993 12 unwritten 180 7466 13554799 13552594 12 unwritten 181 7478 13554997 13554811 12 unwritten 182 7490 13555452 13555009 12 unwritten 183 7502 13556098 13555464 12 unwritten 184 7514 13557363 13556110 12 unwritten 185 7526 13550750 13557375 11 unwritten 186 7537 13550762 13550761 11 unwritten 187 7548 13551903 13550773 11 unwritten 188 7559 13554730 13551914 11 unwritten 189 7570 13550691 13554741 10 unwritten 190 7580 13551517 13550701 10 unwritten 191 7590 13552324 13551527 10 unwritten 192 7600 13554013 13552334 10 unwritten 193 7610 13554812 13554023 10 unwritten 194 7620 13549843 13554822 9 unwritten 195 7629 13551118 13549852 9 unwritten 196 7638 13551250 13551127 9 unwritten 197 7647 13551500 13551259 9 unwritten 198 7656 13552335 13551509 9 unwritten 199 7665 13553684 13552344 9 unwritten 200 7674 13554661 13553693 9 unwritten 201 7683 13556886 13554670 9 unwritten 202 7692 13559300 13556895 9 unwritten 203 7701 13561293 13559309 9 unwritten 204 7710 13561303 13561302 8 unwritten 205 7718 13560950 13561311 7 unwritten 206 7725 13561199 13560957 7 unwritten 207 7732 13561317 13561206 7 unwritten 208 7739 13559285 13561324 6 unwritten 209 7745 13561183 13559291 6 unwritten 210 7751 13561192 13561189 6 unwritten 211 7757 13561548 13561198 6 unwritten 212 7763 13558768 13561554 5 unwritten 213 7768 13558889 13558773 5 unwritten 214 7773 13559294 13558894 5 unwritten 215 7778 13559310 13559299 5 unwritten 216 7783 13560214 13559315 5 unwritten 217 7788 13561118 13560219 5 unwritten 218 7793 13558047 13561123 4 unwritten 219 7797 13558332 13558051 4 unwritten 220 7801 13558365 13558336 4 unwritten 221 7805 13558622 13558369 4 unwritten 222 7809 13558679 13558626 4 unwritten 223 7813 13558749 13558683 4 unwritten 224 7817 13559165 13558753 4 unwritten 225 7821 13564189 13559169 36 unwritten 226 7857 13564289 13564225 70 unwritten 227 7927 13559354 13564359 4 unwritten 228 7931 13564891 13559358 38 unwritten 229 7969 13565148 13564929 84 unwritten 230 8053 13565233 13565232 63 unwritten 231 8116 13565297 13565296 19 unwritten 232 8135 13565317 13565316 10 unwritten 233 8145 13565328 13565327 41 unwritten 234 8186 13559471 13565369 4 unwritten 235 8190 13565375 13559475 45 unwritten 236 8235 13565421 13565420 38 unwritten 237 8273 13565460 13565459 48 unwritten 238 8321 13565509 13565508 17 unwritten 239 8338 13565370 13565526 4 unwritten 240 8342 13557962 13565374 3 unwritten 241 8345 13565533 13557965 94 unwritten 242 8439 13558370 13565627 3 unwritten 243 8442 13565631 13558373 6 unwritten 244 8448 13565638 13565637 86 unwritten 245 8534 13558540 13565724 3 unwritten 246 8537 13565729 13558543 13 unwritten 247 8550 13565743 13565742 105 unwritten 248 8655 13565849 13565848 28 unwritten 249 8683 13565878 13565877 75 unwritten 250 8758 13558664 13565953 3 unwritten 251 8761 13558762 13558667 3 unwritten 252 8764 13558858 13558765 3 unwritten 253 8767 13565981 13558861 11 unwritten 254 8778 13570409 13565992 54 unwritten 255 8832 13571201 13570463 47 unwritten 256 8879 13575188 13571248 35 unwritten 257 8914 13579393 13575223 119 unwritten 258 9033 13582040 13579512 106 unwritten 259 9139 13582147 13582146 82 unwritten 260 9221 13582231 13582229 106 unwritten 261 9327 13575840 13582337 53 unwritten 262 9380 13582005 13575893 34 unwritten 263 9414 13579728 13582039 33 unwritten 264 9447 13579915 13579761 24 unwritten 265 9471 13574339 13579939 23 unwritten 266 9494 13577088 13574362 20 unwritten 267 9514 13577627 13577108 19 unwritten 268 9533 13579950 13577646 18 unwritten 269 9551 13574295 13579968 17 unwritten 270 9568 13582508 13574312 30 unwritten 271 9598 13588652 13582538 146 unwritten 272 9744 13585801 13588798 121 unwritten 273 9865 13585434 13585922 120 unwritten 274 9985 13588448 13585554 119 unwritten 275 10104 13588180 13588567 113 unwritten 276 10217 13588951 13588293 107 unwritten 277 10324 13586207 13589058 106 unwritten 278 10430 13589131 13586313 164 unwritten 279 10594 13586622 13589295 102 unwritten 280 10696 13589328 13586724 106 unwritten 281 10802 13586927 13589434 82 unwritten 282 10884 13585993 13587009 79 unwritten 283 10963 13587311 13586072 78 unwritten 284 11041 13589514 13587389 78 unwritten 285 11119 13587602 13589592 77 unwritten 286 11196 13589929 13587679 161 unwritten 287 11357 13589436 13590090 77 unwritten 288 11434 13590120 13589513 120 unwritten 289 11554 13590241 13590240 126 unwritten 290 11680 13586543 13590367 76 unwritten 291 11756 13590409 13586619 120 unwritten 292 11876 13589593 13590529 70 unwritten 293 11946 13586857 13589663 69 unwritten 294 12015 13586359 13586926 67 unwritten 295 12082 13588883 13586426 67 unwritten 296 12149 13589063 13588950 67 unwritten 297 12216 13586727 13589130 64 unwritten 298 12280 13586468 13586791 61 unwritten 299 12341 13585929 13586529 60 unwritten 300 12401 13586073 13585989 59 unwritten 301 12460 13585613 13586132 58 unwritten 302 12518 13585690 13585671 58 unwritten 303 12576 13584829 13585748 57 unwritten 304 12633 13589704 13584886 57 unwritten 305 12690 13588800 13589761 52 unwritten 306 12742 13588312 13588852 51 unwritten 307 12793 13586148 13588363 47 unwritten 308 12840 44779909 13586195 61 unwritten 309 12901 44780846 44779970 79 unwritten 310 12980 44780458 44780925 61 unwritten 311 13041 44779653 44780519 58 unwritten 312 13099 44777775 44779711 52 unwritten 313 13151 44778482 44777827 51 unwritten 314 13202 44779251 44778533 51 unwritten 315 13253 44781016 44779302 91 unwritten 316 13344 44778808 44781107 48 unwritten 317 13392 44779120 44778856 46 unwritten 318 13438 44781140 44779166 63 unwritten 319 13501 44778244 44781203 45 unwritten 320 13546 44778762 44778289 45 unwritten 321 13591 44781225 44778807 95 unwritten 322 13686 44778858 44781320 44 unwritten 323 13730 44778187 44778902 43 unwritten 324 13773 44779053 44778230 41 unwritten 325 13814 44781399 44779094 43 unwritten 326 13857 44778962 44781442 40 unwritten 327 13897 44779487 44779002 40 unwritten 328 13937 44778414 44779527 39 unwritten 329 13976 44778922 44778453 39 unwritten 330 14015 44781321 44778961 39 unwritten 331 14054 44781517 44781360 85 unwritten 332 14139 44780786 44781602 38 unwritten 333 14177 44777555 44780824 37 unwritten 334 14214 44780587 44777592 36 unwritten 335 14250 44778642 44780623 35 unwritten 336 14285 44781647 44778677 100 unwritten 337 14385 44781748 44781747 45 unwritten 338 14430 44780382 44781793 35 unwritten 339 14465 44778340 44780417 34 unwritten 340 14499 44779385 44778374 34 unwritten 341 14533 44781848 44779419 72 unwritten 342 14605 44779870 44781920 34 unwritten 343 14639 44780015 44779904 34 unwritten 344 14673 44777889 44780049 33 unwritten 345 14706 44781972 44777922 138 unwritten 346 14844 44782111 44782110 160 unwritten 347 15004 44780926 44782271 32 unwritten 348 15036 44778375 44780958 31 unwritten 349 15067 44778575 44778406 31 unwritten 350 15098 44780187 44778606 30 unwritten 351 15128 44782299 44780217 37 unwritten 352 15165 44778688 44782336 29 unwritten 353 15194 44782353 44778717 75 unwritten 354 15269 44782429 44782428 122 unwritten 355 15391 44782553 44782551 322 unwritten 356 15713 44782876 44782875 40 unwritten 357 15753 44782917 44782916 30 unwritten 358 15783 44782948 44782947 70 unwritten 359 15853 44783019 44783018 86 unwritten 360 15939 44783107 44783105 215 unwritten 361 16154 44783323 44783322 35 unwritten 362 16189 44778724 44783358 29 unwritten 363 16218 44783389 44778753 52 unwritten 364 16270 44783442 44783441 67 unwritten 365 16337 44783510 44783509 76 unwritten 366 16413 44783587 44783586 91 unwritten 367 16504 44783679 44783678 188 unwritten 368 16692 44783868 44783867 55 unwritten 369 16747 44783924 44783923 45 unwritten 370 16792 44783970 44783969 39 unwritten 371 16831 44780072 44784009 29 unwritten 372 16860 44784022 44780101 73 unwritten 373 16933 44784096 44784095 76 unwritten 374 17009 44780115 44784172 29 unwritten 375 17038 44780145 44780144 29 unwritten 376 17067 44784181 44780174 233 unwritten 377 17300 44784415 44784414 255 unwritten 378 17555 44783359 44784670 29 unwritten 379 17584 44779712 44783388 28 unwritten 380 17612 44779777 44779740 28 unwritten 381 17640 44784707 44779805 52 unwritten 382 17692 44781369 44784759 28 unwritten 383 17720 44777970 44781397 27 unwritten 384 17747 44778085 44777997 27 unwritten 385 17774 44778141 44778112 27 unwritten 386 17801 44778293 44778168 27 unwritten 387 17828 44784809 44778320 179 unwritten 388 18007 44784989 44784988 40 unwritten 389 18047 44785030 44785029 231 unwritten 390 18278 44785262 44785261 45 unwritten 391 18323 44785308 44785307 357 unwritten 392 18680 44778547 44785665 27 unwritten 393 18707 44779357 44778574 27 unwritten 394 18734 44779537 44779384 27 unwritten 395 18761 44780278 44779564 27 unwritten 396 18788 44781921 44780305 27 unwritten 397 18815 44779017 44781948 26 unwritten 398 18841 44779580 44779043 26 unwritten 399 18867 44780335 44779606 26 unwritten 400 18893 44780658 44780361 26 unwritten 401 18919 44780728 44780684 26 unwritten 402 18945 44785892 44780754 30 unwritten 403 18975 44789606 44785922 136 unwritten 404 19111 44788602 44789742 104 unwritten 405 19215 44789075 44788706 95 unwritten 406 19310 44789895 44789170 92 unwritten 407 19402 44787855 44789987 78 unwritten 408 19480 44787670 44787933 77 unwritten 409 19557 44791413 44787747 80 unwritten 410 19637 44788513 44791493 75 unwritten 411 19712 44790631 44788588 75 unwritten 412 19787 44787177 44790706 71 unwritten 413 19858 44791556 44787248 122 unwritten 414 19980 44790092 44791678 69 unwritten 415 20049 44786455 44790161 68 unwritten 416 20117 44790242 44786523 66 unwritten 417 20183 44791726 44790308 118 unwritten 418 20301 44791100 44791844 63 unwritten 419 20364 44788380 44791163 62 unwritten 420 20426 44786252 44788442 54 unwritten,eof testfile: 421 extents found [robm@imap14 conf]$ filefrag -v testfile2 Filesystem type is: ef53 File size of testfile2 is 20971520 (20480 blocks, blocksize 1024) ext logical physical expected length flags 0 0 44789287 60 unwritten 1 60 44791893 44789347 65 unwritten 2 125 44789786 44791958 60 unwritten 3 185 44787297 44789846 59 unwritten 4 244 44788004 44787356 59 unwritten 5 303 44792057 44788063 83 unwritten 6 386 44791023 44792140 59 unwritten 7 445 44789420 44791082 58 unwritten 8 503 44791281 44789478 58 unwritten 9 561 44792216 44791339 83 unwritten 10 644 44787360 44792299 57 unwritten 11 701 44789198 44787417 57 unwritten 12 758 44788926 44789255 56 unwritten 13 814 44792388 44788982 189 unwritten 14 1003 44792578 44792577 157 unwritten 15 1160 44792736 44792735 65 unwritten 16 1225 44786531 44792801 55 unwritten 17 1280 44792817 44786586 56 unwritten 18 1336 44789500 44792873 54 unwritten 19 1390 44787126 44789554 50 unwritten 20 1440 44790188 44787176 49 unwritten 21 1489 44792929 44790237 132 unwritten 22 1621 44793062 44793061 78 unwritten 23 1699 44788086 44793140 47 unwritten 24 1746 44786733 44788133 46 unwritten 25 1792 44793167 44786779 92 unwritten 26 1884 44793260 44793259 131 unwritten 27 2015 44788841 44793391 45 unwritten 28 2060 44793415 44788886 128 unwritten 29 2188 44789029 44793543 45 unwritten 30 2233 44792331 44789074 45 unwritten 31 2278 44793562 44792376 110 unwritten 32 2388 44790741 44793672 44 unwritten 33 2432 44793684 44790785 173 unwritten 34 2605 44788795 44793857 42 unwritten 35 2647 44788311 44788837 40 unwritten 36 2687 44790962 44788351 40 unwritten 37 2727 44790511 44791002 39 unwritten 38 2766 44787249 44790550 38 unwritten 39 2804 44790015 44787287 38 unwritten 40 2842 44790370 44790053 38 unwritten 41 2880 44790472 44790408 38 unwritten 42 2918 44786792 44790510 37 unwritten 43 2955 44789364 44786829 37 unwritten 44 2992 44787938 44789401 36 unwritten 45 3028 44787810 44787974 35 unwritten 46 3063 44791494 44787845 35 unwritten 47 3098 44786380 44791529 33 unwritten 48 3131 44787440 44786413 33 unwritten 49 3164 44790409 44787473 33 unwritten 50 3197 44792010 44790442 32 unwritten 51 3229 44787750 44792042 31 unwritten 52 3260 44788887 44787781 31 unwritten 53 3291 44792874 44788918 31 unwritten 54 3322 44794131 44792905 31 unwritten 55 3353 44798983 44794162 178 unwritten 56 3531 44799949 44799161 147 unwritten 57 3678 44800354 44800096 175 unwritten 58 3853 44800531 44800529 149 unwritten 59 4002 44797734 44800680 99 unwritten 60 4101 44799648 44797833 95 unwritten 61 4196 44798074 44799743 88 unwritten 62 4284 44800953 44798162 113 unwritten 63 4397 44798549 44801066 85 unwritten 64 4482 44800268 44798634 85 unwritten 65 4567 44798645 44800353 79 unwritten 66 4646 44798323 44798724 78 unwritten 67 4724 44797840 44798401 76 unwritten 68 4800 44799181 44797916 76 unwritten 69 4876 44795475 44799257 74 unwritten 70 4950 44797386 44795549 72 unwritten 71 5022 44801325 44797458 71 unwritten 72 5093 44795922 44801396 70 unwritten 73 5163 44801683 44795992 142 unwritten 74 5305 44796623 44801825 70 unwritten 75 5375 44801881 44796693 168 unwritten 76 5543 44797584 44802049 67 unwritten 77 5610 44795206 44797651 66 unwritten 78 5676 44797133 44795272 66 unwritten 79 5742 44798912 44797199 60 unwritten 80 5802 44798163 44798972 59 unwritten 81 5861 44796879 44798222 58 unwritten 82 5919 44798455 44796937 58 unwritten 83 5977 44794654 44798513 57 unwritten 84 6034 44796544 44794711 57 unwritten 85 6091 44797954 44796601 57 unwritten 86 6148 44798752 44798011 57 unwritten 87 6205 44798223 44798809 55 unwritten 88 6260 44796237 44798278 54 unwritten 89 6314 44794524 44796291 53 unwritten 90 6367 44796788 44794577 51 unwritten 91 6418 44798020 44796839 51 unwritten 92 6469 44794321 44798071 48 unwritten 93 6517 44798402 44794369 47 unwritten 94 6564 44796433 44798449 44 unwritten 95 6608 44794187 44796477 43 unwritten 96 6651 44795577 44794230 43 unwritten 97 6694 44797079 44795620 43 unwritten 98 6737 44798279 44797122 43 unwritten 99 6780 44794884 44798322 42 unwritten 100 6822 44797316 44794926 42 unwritten 101 6864 44794833 44797358 41 unwritten 102 6905 44795780 44794874 41 unwritten 103 6946 44794995 44795821 39 unwritten 104 6985 44796504 44795034 39 unwritten 105 7024 44797502 44796543 39 unwritten 106 7063 44795040 44797541 37 unwritten 107 7100 44794259 44795077 36 unwritten 108 7136 44797239 44794295 36 unwritten 109 7172 44794578 44797275 35 unwritten 110 7207 44796355 44794613 35 unwritten 111 7242 44795367 44796390 34 unwritten 112 7276 44795633 44795401 34 unwritten 113 7310 44796292 44795667 34 unwritten 114 7344 44797549 44796326 34 unwritten 115 7378 44798871 44797583 34 unwritten 116 7412 44796976 44798905 33 unwritten 117 7445 44794736 44797009 32 unwritten 118 7477 44796694 44794768 32 unwritten 119 7509 44794791 44796726 31 unwritten 120 7540 44794963 44794822 31 unwritten 121 7571 44795405 44794994 31 unwritten 122 7602 44795443 44795436 31 unwritten 123 7633 44796152 44795474 31 unwritten 124 7664 44802226 44796183 31 unwritten 125 7695 44808125 44802257 101 unwritten 126 7796 44808240 44808226 83 unwritten 127 7879 44808324 44808323 62 unwritten 128 7941 44808018 44808386 60 unwritten 129 8001 44803262 44808078 37 unwritten 130 8038 44808408 44803299 123 unwritten 131 8161 44806517 44808531 30 unwritten 132 8191 44808559 44806547 74 unwritten 133 8265 44807545 44808633 30 unwritten 134 8295 44804990 44807575 29 unwritten 135 8324 44803712 44805019 28 unwritten 136 8352 44804103 44803740 28 unwritten 137 8380 44808676 44804131 97 unwritten 138 8477 44808774 44808773 38 unwritten 139 8515 44808813 44808812 92 unwritten 140 8607 44808906 44808905 55 unwritten 141 8662 44809177 44808961 105 unwritten 142 8767 44809283 44809282 62 unwritten 143 8829 44809438 44809345 35 unwritten 144 8864 44809596 44809473 41 unwritten 145 8905 44809638 44809637 140 unwritten 146 9045 44806785 44809778 28 unwritten 147 9073 44809783 44806813 194 unwritten 148 9267 44807795 44809977 28 unwritten 149 9295 44802258 44807823 26 unwritten 150 9321 44805759 44802284 26 unwritten 151 9347 44808532 44805785 26 unwritten 152 9373 44810002 44808558 129 unwritten 153 9502 44802419 44810131 25 unwritten 154 9527 44810135 44802444 106 unwritten 155 9633 44802500 44810241 25 unwritten 156 9658 44802977 44802525 25 unwritten 157 9683 44803076 44803002 25 unwritten 158 9708 44804791 44803101 25 unwritten 159 9733 44807082 44804816 25 unwritten 160 9758 44807224 44807107 25 unwritten 161 9783 44807586 44807249 25 unwritten 162 9808 44808079 44807611 25 unwritten 163 9833 44806291 44808104 24 unwritten 164 9857 44803491 44806315 23 unwritten 165 9880 44804325 44803514 23 unwritten 166 9903 44805519 44804348 22 unwritten 167 9925 44807354 44805541 21 unwritten 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52401564 52400455 60 unwritten 217 15118 52398802 52401624 57 unwritten 218 15175 52401634 52398859 82 unwritten 219 15257 52401718 52401716 97 unwritten 220 15354 52397001 52401815 55 unwritten 221 15409 52396448 52397056 54 unwritten 222 15463 52399159 52396502 54 unwritten 223 15517 52396209 52399213 49 unwritten 224 15566 52401871 52396258 146 unwritten 225 15712 52398410 52402017 49 unwritten 226 15761 52402031 52398459 82 unwritten 227 15843 52398306 52402113 48 unwritten 228 15891 52398460 52398354 46 unwritten 229 15937 52397555 52398506 45 unwritten 230 15982 52400759 52397600 43 unwritten 231 16025 52402222 52400802 106 unwritten 232 16131 52402329 52402328 102 unwritten 233 16233 52402432 52402431 184 unwritten 234 16417 52397740 52402616 40 unwritten 235 16457 52400590 52397780 40 unwritten 236 16497 52402638 52400630 46 unwritten 237 16543 52402686 52402684 82 unwritten 238 16625 52402769 52402768 42 unwritten 239 16667 52399966 52402811 39 unwritten 240 16706 52397212 52400005 38 unwritten 241 16744 52402831 52397250 47 unwritten 242 16791 52402879 52402878 108 unwritten 243 16899 52399108 52402987 37 unwritten 244 16936 52397933 52399145 36 unwritten 245 16972 52399852 52397969 36 unwritten 246 17008 52396834 52399888 35 unwritten 247 17043 52403035 52396869 67 unwritten 248 17110 52403103 52403102 48 unwritten 249 17158 52403152 52403151 84 unwritten 250 17242 52397781 52403236 35 unwritten 251 17277 52398667 52397816 35 unwritten 252 17312 52403250 52398702 154 unwritten 253 17466 52396870 52403404 34 unwritten 254 17500 52398189 52396904 34 unwritten 255 17534 52403406 52398223 33 unwritten 256 17567 52397387 52403439 32 unwritten 257 17599 52403508 52397419 38 unwritten 258 17637 52396259 52403546 31 unwritten 259 17668 52403554 52396290 141 unwritten 260 17809 52396546 52403695 31 unwritten 261 17840 52398151 52396577 31 unwritten 262 17871 52403725 52398182 187 unwritten 263 18058 52398711 52403912 31 unwritten 264 18089 52403915 52398742 39 unwritten 265 18128 52403955 52403954 58 unwritten 266 18186 52404014 52404013 157 unwritten 267 18343 52404172 52404171 53 unwritten 268 18396 52399606 52404225 31 unwritten 269 18427 52400558 52399637 31 unwritten 270 18458 52401006 52400589 31 unwritten 271 18489 52401087 52401037 31 unwritten 272 18520 52396580 52401118 30 unwritten 273 18550 52400087 52396610 30 unwritten 274 18580 52396333 52400117 29 unwritten 275 18609 52397457 52396362 29 unwritten 276 18638 52404302 52397486 37 unwritten 277 18675 52407521 52404339 108 unwritten 278 18783 52406311 52407629 107 unwritten 279 18890 52406629 52406418 107 unwritten 280 18997 52406894 52406736 107 unwritten 281 19104 52407283 52407001 104 unwritten 282 19208 52405118 52407387 81 unwritten 283 19289 52405498 52405199 63 unwritten 284 19352 52407688 52405561 63 unwritten 285 19415 52408078 52407751 51 unwritten 286 19466 52408164 52408129 51 unwritten 287 19517 52404451 52408215 50 unwritten 288 19567 52408301 52404501 53 unwritten 289 19620 52406750 52408354 50 unwritten 290 19670 52407775 52406800 49 unwritten 291 19719 52407960 52407824 46 unwritten 292 19765 52404632 52408006 40 unwritten 293 19805 52405251 52404672 40 unwritten 294 19845 52408425 52405291 40 unwritten 295 19885 52404778 52408465 38 unwritten 296 19923 52407244 52404816 38 unwritten 297 19961 52408247 52407282 37 unwritten 298 19998 52406133 52408284 36 unwritten 299 20034 52408566 52406169 54 unwritten 300 20088 52406491 52408620 36 unwritten 301 20124 52408651 52406527 51 unwritten 302 20175 52408703 52408702 137 unwritten 303 20312 52408841 52408840 107 unwritten 304 20419 52407194 52408948 36 unwritten 305 20455 52510893 52407230 25 unwritten,eof testfile2: 306 extents found > What we probably need to do is to have some hueristic where if we know > there are plenty of block groups with lots of large contiguous free > space, and the block group which we are preferring either because it's > the same one as the inode number, or because it's where we had > previously done the last block allocation for the file, and we the > user requests a large fallocated region, that it's better to switch > over to one of the other block groups with lots and lots of free > space. In this particular case, those allocations look to be in 2 main areas for each file, however I know that in other tests we saw data spread all over the place. For that matter, one big question I have is why each of these results is so different. [robm@imap14 conf]$ for i in 1 2 3 4 5 6 7 8 9 10; do fallocate -l 20m testfile3; filefrag testfile3; /bin/rm testfile3; done testfile3: 496 extents found testfile3: 284 extents found testfile3: 714 extents found testfile3: 285 extents found testfile3: 632 extents found testfile3: 269 extents found testfile3: 701 extents found testfile3: 290 extents found testfile3: 349 extents found testfile3: 337 extents found -- Rob Mueller robm@fastmail.fm