A Study of End-User SCSI Disk Performance with Parallel and Non-parallel Files
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(2) INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET EN AUTOMATIQUE. A Study of End-User SCSI Disk Performance with Parallel and Non-parallel Files Robert D. Russell. No 3494 September 1998 ` THEME 1. ISSN 0249-6399. apport de recherche.
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(47) Writing 128 MB Files under Linux 10 2048 Byte Blocks 16384 Byte Blocks 131072 Byte Blocks. Total Megabytes per Second. 8. 6 5.4 4.7 4.6 4. 2. 0 1. 2 4 8 Number of Processes (All on 1 Node) Simultaneously Writing Different Files. ³'aj_V¦¢ Pkpd`bo2qS^- k'j-T adhqV-qjhkgtUVU^_^hVU^ V$`rtmQWjhd_uSkpuVe^_V gaVUugdhà`bVZausV0j ¨ ugac k'u`(iVUugdhaTij_k@ ³pajhV ¢(^_Qkb^-dhQV dhkpd`rë2 o -qL^ V'^haSTWTWV0skbpVUj`r@qj_kgtUVU^h^_VU-^ $Zkp~d`ruSVUs jhkpT dhQV s^hW`r^d_QVeugaT ~VUj-kb ^hT adm`buVUkpa^hfe`rtUdh'V-qj_kDt0VU^h^_VU^^'`bjhVUs jhkpT/XIdhk(S¨PQV-dhQj_VUVtUaj_'VU^6¡'QtmQ`rjhV-uV$`bj_f¦sV0uDd_t$`b¡6tUk'j_jhVU^_q@kpus dhkjhd_V¦aSudh^kbI'£ryD¡ X px'ry@¡g`bus X$xSX$£ ' ~gfgdhVU^6IPQ^-'jm`bqQ^hQSkb^e`buXpX$¤ sSjhk'q ud_QV j`rdhV'¡ jhkpT ¢S y2 o -q^ QVUu(lmaS^hd-k'uV qj_kDt0VU^h^Z^`bt0dh'V'¡gd_kW`b~k'ad-y@Ä(' o q^QSVUuTWk'j_VdhQ@`ruk'uVZqjhkgtUVU^_^e^e`bt0dh'V'I³Saj_dhQVUj_TWkpjhV'¡pdhQV ugaT ~VUjkbI^hT adm`buVUkpa^hf `btUd_'V(qj_kgtUVU^h^_VU^(skgVU^_u de^_VUVUT#dhk V aëVUt0d(q@V0j kpjhT`rutUV k'uStUV(dhQSVUjhV^TWk'j_V dhQ@`rukpuV'¡ ^hut0V(dhQV d_k'd`r¨j`rdhV(j_VUT`ruS^I `rjhf `bde`b^d_QV ugaT ~@V0jkrB`rtUdhpV¦qSjhkgtUVU^_^hVU^ utUj_V$`b^_VU^e~VUf'kpus7d-k@ PQV-uVUcgddhVU^_dItUk'uS^h^hd_^2kr@^hV0'VUjm`b^_T aSdm`buV0k'a^_f `btUd_'VIqj_kgtUVU^h^_VU^-jhV$`rsue^_VUq@`bjm`bd_V-@VU^ jhkpT `^hupVI^hQ@`rjhVUs ||gZs^h¨(PQSV^_d`buSs@`bj_" s PDKe
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(49) _sVUpjhVUV krugdhVUj_V6`6Du# (kbIdhQV4@VU^ ~VUuWj_d_dhVUu k'jj_V$`bsIPQ^^dhQV4uDaST ~@VUj-kb@VU^ed_Q@`bde`rjhV jhd_dhVUu7kpjjhV$`rs7^hT adm`buVUkpa^hfgª³Sk'j-VUc`bTWqSVp¡gVU'Qgd-@VU^-VUjhV jhd_dhVUuHk'uV `6NdhVUjZdhQVk'd_QVUj$¡ dhQVUj sVUpjhVUV krugdhVUj_V6`6Du ^X' Nd_QVV0pQgd@VU^ -VUjhVjhdhd_VUuH^hT ad`ruVUk'aS^hfD¡ dhQSVUjesVUpjhVUV krIugd_VUjhV$`6gu -k'as~@V Z-V6`bjhf dhQVsVUpjhVUVkbugdhV0jhV$`6gu saj_uS jhdhu V aëV0tUdh^(d_QV(à`6f'kpad kbdhQSV@VU^(k'u d_QV s^h `buSsd_QVUjhVé k'j_VWT`6fQ@`6pV`{^ha~^_d`ruDd_à`bIV a¨VUtUdk'u d_QV dhT V(d`r'VUu d_kj_V$`bs dhQV0T~@`rt¨ ³V0^Ijhdhd_VUu dhQ7X `6f ugd_VUjhV$`6gu t$`bu ~VeV0cDqVUtUd_VUsdhk(~V^hd_k'j_VUsWj_k'apQf(tUk'ugd_pak'aS^hf(k'u d_QVs^h¨¡pQVUj_V$`b^ @VU^ jhd_dhVUu dhQH `6fugdhVUj_V6`6Du t$`buH~V VUcgq@VUt0dhVUs dhk~@V^hd_k'j_VUs upjhk'aSq^ kb~kgtmg^¦d_Q@`bd T`6fW~V sSVUf ^hV0q@`bjm`bdhV0skpu dhQVZs^h¨d^`r^_k(tUV$`rjd_Q@`bdId_QVesSVU'j_VUV kbªugdhVUj_V6`6Du saSjhu(j_d_u(t$`ruW~Ves a¨VUjhVUugd-dhQ@`ru dhQV sVUpjhVUV4sajhu j_V$`bsSuS@¡`buSsd_Q@`bd'`rjhk'aS^tUkpT ~u@`bd_k'u^T`6fVUcgQ~ds a¨VUjhVUugdZq@VUj² k'j_T`rutUV' ³pajhV ^hQSkb^IdhQVZdhkpd`b¨2 o -q^ à V'ª^_aTWT VUs(kbpVUj`bqjhkgtUV0^h^hV0-^ $kp~d`ruVUs j_k'T d_QVesS^_QSVUuWd_QVeugaT ~VUj kb(^_T aSdm`buV0k'a^_f `bt0dh'V7qSjhkgtUVU^_^hVU^7'`rjhVU^ j_k'T Xdhk `bus dhQSVj_V$`bsaSud ^ QSVUstUk'uS^hd`rugd`bdWp£bygH~Dfgd_VU^$ PQV Nk'ajZtUajhpVU^$¡ QtQH`bjhVuV$`rjhfsVUugdht$`r ¡StUk'j_jhVU^_q@kpusHdhk V0^¦d_Q@`bdZV0jhVjhdhd_VUu7dhQ;X é¡ U¡y `rus `6f ugdhVUj_V6`6Du PQV sVUpjhVUVkbugd_VUjhV$`6gusajhujhV6`bsu ^ªlma^_ddhQV ugaT ~VUjk'u dhQV4c h`bcg^$* $ PQ^@'aSjhV^hQkb^`7pVUjhf ^h'uSt$`bugd sj_k'q;u dhQSVjm`bd_V jhkpT `b~k'aS( d Ä£72 o -q^WQSVUu7lma^hd kpuVqjhkgtUV0^h^^ `bt0dh'V'¡d_k{`r~@kpad¦xSÄ¢ 2 o qS^(QVUuHTWkpjhV dhQ@`rukpuV(qj_kgtUVU^h^^¦`rtUdh'Vp Ee^ `r^ed_QVt6`b^hVu³'aj_V¢ k'jZjhdhu¡ qVUj kpjhT`butUV ^ `bdkputUV(d_QV uDaST ~@VUj-kb`rtUdh'V qj_kgtUVU^h^_VU^ ^e`bd-V6`b^hdZdk ßñ b ßØ.
(50) Reading 128 MB Files in 2 KB Blocks under Linux 10 Files Written Sequentially Files Written with 2-way Interleaving Files Written with 4-way Interleaving Files Written with 8-way Interleaving. Total Megabytes per Second. 8. 6. 6.2 5.9 5.8. 4 3.5 3.3. 2. 0 1. 2 4 8 Number of Processes (All on 1 Node) Simultaneously Reading Different Files. ³'aj_JV Pk'd`rª2 o -q^- k'jT aSd_qVqjhkgtUVU^_^hVU^ V$`rtmQ7jhV$`rsu k'uSV¦^_V gaVUugdhà`r¨@V a^hu ~kgtg^auSsVUj uDaSc k'u7`iVUugdhaT#ijhk Reading 128 MB Files in 16 KB Blocks under Linux 10 Files Written Sequentially Files Written with 2-way Interleaving Files Written with 4-way Interleaving Files Written with 8-way Interleaving. Total Megabytes per Second. 8. 6. 6.3 6.0 5.9 5.7. 4 3.5 3.4 3.3. 2. 0 1. 2 4 8 Number of Processes (All on 1 Node) Simultaneously Reading Different Files. ³'aj_4V Pk'dm`b@2 o -q^- kpjIT adhqVIqSjhkgtUVU^_^hVU^ V$`rtQ jhV$`rsu(kpuVe^_V gaVUugdhà`bVaS^huX ~kgtmD^BausVUj uDaSc k'u7`iVUugdhaT#ijhk bb. ÁcUô0öUÏUö.
(51) Reading 128 MB Files in 128 KB Blocks under Linux 10 Files Written Sequentially Files Written with 2-way Interleaving Files Written with 4-way Interleaving Files Written with 8-way Interleaving. Total Megabytes per Second. 8. 6. 6.2 5.9 5.8 5.7. 4 3.5 3.4 3.3. 2. 0 1. 2 4 8 Number of Processes (All on 1 Node) Simultaneously Reading Different Files. ³'aj_V ªPk'dm`b2 o -q^ kpjT adhqVqjhkgtUVU^_^hVU^V6`btmQ jhV$`rsu k'uV-^hVDaSVUugdhà`bS@VaS^hu X$p ~kgtg^IaSusVUj uDaSc k'u7`iVUugdhaT#ijhk PQV(sj_k'q uqVUjNk'jhT`but0V¦^_QkbuW~gf³ªpajhLV ^QgapV'¡d_k ^`6f d_QV(V$`b^_d$¡g^_uStUVxÄ¢2 o -q^^k'ufW¢'p¤ kbdhQV Ä£o2-q^j`bd_V k'j`W^_u'V qj_kDt0VU^h^67PQ^ @pajhVW`r^hk^hQkb^dhQ`bd(d_Q^¦sSjhk'q ^(usSVUq@V0usVUugdkbedhQSV sVU'j_VUVkb ugdhVUj_V6`6Du dhQHQtQHdhQSV(@V `b^ jhd_dhVUuª¡ ^hutUVW`rd_QV tUaj_'VU^`rjhVgj_dha@`rfsVUugd_t6`b³Sajhd_QVUj_TWk'j_V'¡¨d_Q^ sj_k'qW^-usVUqVUusV0uDdkrªdhQVZ^h©UV kbªd_QVe~Skgtm a^_VUsWuWV6`btmQWj_d_V'¡`b^-^I^hQSkbuW~gf dhQVZuVUcgdd-k @'aSjhVU^6I³ªpajhV ^hQSkb^¦d_QV(j_VU^had_^(kb` ^_VUd kbd_VU^hd_^(^hT à`rjd_kWdhQSk'^hVa^_VUsd_kWkp~d`ru7³'aj_V S¡~aSd¦aS^hu`>~kgt^_©0Vkrn X 'xpby ~gfgdhVU^ u^hd_V$`bsHkb'£byg~gfDd_VU^$³pajhV ^hQSkb^¦d_QVjhVU^_adh^(QV0u` ~kDtm^h©UVkb X$xX6£ p~Dfgd_VU^ `r^ea^_VUsªL -k'd_Q dhQSVU^hV `bssd_kpu@`bp@pajhV0^I^hQkb VU^_^hVUugd_Ò`rf4dhQV^m`bTWV-jhV0^hadh^`b^-³ªpajhRV `Z^h'u @t6`bugdsjhkpq uqVUj kpjhT`butUV-QVUu d-kkpjT k'jhVqSjhkgtUVU^_^hVU^ ^hT adm`buVUkpa^hf`rtUtUVU^_^^hVUq`bj`rdhV V0^kpu`4^hu'VZ^hQ@`rjhVUs7||gBs^h¨¡'usSVUq@V0usVUugdekrªQkb dhQSk'^hVZ@VU^e`rjhV ugdhVUj_V6`6'VUs k'uWd_QV s^h¨PQV qVUj kpjhT`butUVZk'^h^^-^hatmQdhQ`bd-V0^h^dhQ`b/ u '£p¤ kr2d_QV ^hu'VZqjhkgtUVU^_^ s^h ~@`buSssdhQ ^e`6'`rÒ`r~Vu`bp'j_VUD`rdhV dhk T ad_qSV-qj_kDt0VU^h^_VU^$ PQVUj_V(^dhQVUj_Vm kpjhV`^_pu @t$`ruDd-tUkputUa^hkpud_k ~@V sjm`6u jhkpT/dhQV0^hV(d_VU^hd_^ dhQSV^m`bT VW||gs^h ^hpu @t$`bugd_f j_VUsat0VU^dhQVdhkpd`r C |gT ad`buSVUk'a^_f7jhV$`rsuHTWk'j_VWd_Q@`bu k'uV @V jhkpT ~@`busSsSdhQWd_Q@`bde`aS^hVUjZt$`buk'~Sd`bu> jhkpT/dhQ@`rds^h¨ d^-uk'dBk'~ggkpa^IQ@`rd^It6`ba^_uSd_Q^qVUjNk'jhT`but0VsjhkpqªPQVeqSjhTWV^_a^hqVUtUd^-dhQV `bssd_kpu@`b`bjhT T k'dhkpu uVUV0sVUs;d_k^hT ad`ruVUk'aS^hf`rtUtUVU^_^d-k @VU^ ^hdhkpjhVUs u7^hVUq`bj`rdhV`bjhV6`b^(krdhQV ^m`bT Vs^_ë .ZkbVUpVUj$¡ dhQS^ -VUjhV dhQSV ^hk'V t$`ra^hVp¡d ^_VUVUTW^4^hdhjm`bupV dhQ@`rd`bt0tUVU^h^_uT k'j_Vd_Q@`buHdk @VU^4skgVU^uSk'd t$`baS^hVWV0'VUu T k'jhV `bj_TT k'dhkpu `buSsQSVUutUV(V0'VUu7pjhV$`rdhVUjZq@V0j kpjhT`rutUV sVUpj`rs@`bd_kpuªIiVUjhQ`bq^ZdhQVZ@V ^hfg^hd_VUT#^hkr d`bjhVp¡k'jd_QV(||g-^ha~S^hfg^hd_VUT¡ ^(k'qSdhTW©Uu`bjhT T k'dhkpu7QVUu d4Q@`b^(T`bugf7^_T aSdm`buV0k'a^ jhV DaSVU^hd_^ dhk7-k'j_kpuª¡I`bus d_Q^(qj_VU'VUugd_^ ajhd_QVUj sVUpj`rs@`bd_kpu;kredhQVqVUj kpjhT`butUVp[ EZuk'd_QVUj qk'^_^h~df¥^dhQ`bddhQVs^h ^q@V0j kpjhTWu^_k'TWV ^_k'j_d kbeugdhVUj_u@`b qj_Vm VUd_tQSuS;dhQ`bdW-k'j_g^W-VUQVUukpuf;k'uSV@V7^ jhV$`rsª¡^_uStUV7dhQSV~kgtmg^ kb(dhQ@`rd @Vt$`ru~@V¥VUcgq@VUt0dhVUs!d_k ~V7qQgfg^ht$`bfHtUk'ugdhpak'a^ kpu dhQVs^h¨¡-~ad d_Q@`bd ^ s^_jhaqd_VUs k'j ^hT qf~gfgq@`b^_^hVUs $ QVU" u
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(53) Writing 128 MB Files under Linux 10 2048 Byte Blocks 16384 Byte Blocks 131072 Byte Blocks. Total Megabytes per Second. 8. 6 5.5 5.4 4.7 4.6 4. 2. 0 1. 2. 4 Number of Files Written Simultaneously by 1 Process. 8. ³'aSjhV(z Pk'dm`b¨o2-q^ kpjkpuV qjhkgtUV0^h^ jhdhuT adhqV-@VU^^_T ad`buSVUk'a^_fauSsVUj ¨ ugac k'u` iVUugd_aSTijhk. pb¬6 ( % & -(
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(63) Reading 32 MB Files in 16 KB Blocks under Solaris 12 Files Written Sequentially Files Written with 2-way Interleaving Files Written with 4-way Interleaving Files Written with 8-way Interleaving. Total Megabytes per Second. 10. 8. 6. 7.3 6.8 6.4 6.1. 4.0 3.9 3.8. 4. 2. 0 1. 2 4 8 Number of Processes (All on 1 Node) Simultaneously Reading Different Files. ³'aj_V X0y Pk'd`reo2-q^ k'j T aSd_qVqj_kgtUVU^h^_VU^V$`btmQj_V$`bsSuSkpuV^hV gaVUugd_Ò`r@Va^_uS X /~kgtmD^ aSusVUj |gkpÒ`rjh^-k'u7`| PDK!àpiI utUj_V$`b^_VU^4 q@V0jhQ@`rq^I~VUt$`baS^hVe|gkpÒ`rjh^ª^ukpd2kpqdhT ©0uS`rjhT T k'd_kpuekbpVUjT`bugfZjhV gaVU^_dh^6¡`bus¨ugac ^-$U;.ekb-VUpVUj$¡ dhQSV~@`b^_tt0k'utUa^_k'u jhV0T`bu^d_QV^`rTWV ¨d_QVUj_Ve^`Z^h'uSt$`bugdsjhkpq uqVUjNk'jhT`but0VLàk'u d_QVk'j_sVUjIkr2¢'£p¤+$¨QVUu d-kkpjTWk'j_Veqj_kgtUVU^h^_VU^(^_T aSdm`buV0k'a^_f4jhV$`rs7s aëV0jhVUugd-@VU^n jhkpT/dhQV ^m`bTWVZ^hQ@`rjhVUsH||g-s^h¨ ³aSjhdhQSVUjhT k'jhVp¡'`b^`b^dhQVt6`b^hV-Nk'j ¨ugac¨¡6dhQ^sjhkpq ^2usSVUq@V0usVUugdIkr@dhQV^_©UVkb@d_QV~kgtm(a^hV0s u4V$`btmQ jhV6`bsª¡ `b^^ª^_Qkbu~Df d_QVuSVUcgd2d-k'aj_VU^$I³'aj_V¦X0ye^_Qkb^dhQV-jhVU^_adh^kb¨`e^_VUdkb@d_VU^hd_^I^hT à`rj@d_k¦d_Qk'^_VaS^hVUsdhk k'~Sd`bu ³'aj_VX$xS¡g~ada^_u`4~kgtm ^h©UV kb X 'xpby(~gfgdhV0^uS^hdhV6`bskb2p£byD4~gfgdhVU^6d^hQkpasW~V¦t0k'TWq`bjhV0sWdhQ³ªpajhV kpj ugac¨³pajhVX$¢4^hQkb^-dhQSV¦j_VU^haSd_^QVUu7`4~kDtm ^_©0V¦krX$xSX$£ p ~gfgdhVU^`b^-a^hV0sª¡@`rusW^_Qk'as ~@V tUkpTWq@`rjhVUs dhQ ³pajhV > k'j ¨ugac¨L -k'd_Q dhQVU^_VW`bssSd_k'u@`r¨@pajhVU^4^hQkb VU^h^_VUugdhà`bf7dhQSV ^`bT V(jhV0^hadh^`b^(³pajhV7X6xW`rus dhQSV¦t0k'TWq`bj`r~V uDaSc(@pajhV0^ `^h'u @t6`bugdsSjhk'q u q@VUj² k'j_T`rutUVeQSVUuWd-kkpjT k'j_VqjhkgtUVU^_^hVU^Z^hT ad`ruVUkpa^hf `bt0tUVU^h^Z^hVUq`bj`rdhVZ@VU^-k'u`(^_uS'V^hQ@`rjhVUs7|| Is^h¨¡gusVUqVUusSVUugdkbªQkbd_Qk'^_VZ@VU^`rjhVZugd_VUjhV$`6pVUsWkpuWdhQSV¦sS^_¨ pb¬6 ( % & -(
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(67) Reading 32 MB Files in 128 KB Blocks under Solaris 12 Files Written Sequentially Files Written with 2-way Interleaving Files Written with 4-way Interleaving Files Written with 8-way Interleaving. Total Megabytes per Second. 10. 8 7.6 7.0 6.8 6.4 6. 4. 3.9 3.8. 2. 0 1. 2 4 8 Number of Processes (All on 1 Node) Simultaneously Reading Different Files. ³'aj_VX$¢ (Pk'dm`bo'q^Nk'j(T ad_qSV4qjhkgtUVU^_^hVU^ V$`btmQ jhV$`rsu7k'uSVW^hVDaSVUugdhà`b-@V a^_u;X$p ~kgtg^(aSusVUj |gkpÒ`rjh^-k'u7`| PDK!àpiI . Writing 32 MB Files under Solaris 12 2048 Byte Blocks 16384 Byte Blocks 131072 Byte Blocks. Total Megabytes per Second. 10. 8 7.2 7.1 6.4 6.2. 6. 4. 2. 0 1. 2. 4 Number of Files Written Simultaneously by 1 Process. 8. ³'aj_VX Pk'd`rëo'q^n k'j-k'uSV¦qSjhkgtUVU^_^ejhd_uST ad_qSV-V0^^hT ad`ruVUk'aS^hf(ausSVUj¦|gkpà`bjh^-k'u`|P^K!à'iB ßñ b ßØ.
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