Webサービスにおける キャッシュ戦略

by Yusuke Wada

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8FCαʔϏεʹ͓͚Δ  Ωϟογϡઓུ :"1$"TJB)BDIJPKJNJEJO4IJOBHBXB :VTVLF8BEBBLBZVTVLFCF

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ࣗݾ঺հ w ࿨ా༟հBLBZVTVLFCF w ϫσΟοτ୅දऔక໾ w ΦϞϩΩ$50 w ٕज़ސ໰Y w DPGPVOEFSPGCPLFUF w XBEBGNEBOEZGN w 1FSM.POHFS

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࠷ۙͭͬͯ͘Δ΋ͷ

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3VCZPO3BJMT"QQ BOE J04"QQ

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ຊτʔΫͷςʔϚ

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Ωϟογϡ

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ͱ͸͍ͬͯ΋

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௿ϨΠϠʔͷΩϟογϡ ͷ࿩͸͠·ͤΜ

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7BSOJTIͷ࿩΋͠·ͤΜ ͳ͔ͥ͸ޙͰ෼͔Δ

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౰વ

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ݱۚͷ࿩͸͠·ͤΜʂ

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8FCΞϓϦέʔγϣϯ ϨΠϠʔͰѻ͏Ωϟογϡ ͷ࿩Λ͠·͢ʂ

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ΞδΣϯμ w Ωϟογϡͷ໨త w Ωϟογϡͷجૅ w Ωϟογϡύλʔϯ w Ωϟογϡ ΦϨΦϨ ઓུ

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Ωϟογϡͷ໨త

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*0ͷޮ཰Խ

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*0͕ϘτϧωοΫʹͳΔ݅ w ྫ%BUF5JNFΛ࢖͏࢖Θͳ͍WTTMPXRVFSZ໰୊ w *0ͷੑೳʹൺ΂ͯ$16ੑೳͷํ͕ߴ͍৔߹͕ଟ͍ w σʔλ͸஝ੵ͢Δ͠σʔλྔ͕૿͑Ε͹େن໛΁ w 3%#.4ʹ͸ෳࡶͳࣄ৘͕͋ΔΑͶ w ֎෦΁ͷ8FC"1*ΞΫηε΋*0ͱͯ͠ߟ͑ΒΕΔ w ݁Ռ*0ό΢ϯυ͕ϘτϧωοΫʹͳΔ

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*0ϘτϧωοΫվળ w 3%#.4ͷ৔߹͚ͩͲ w ΫΤϦνϡʔχϯά w ςʔϒϧઃܭͷݟ௚͠ w ҙਤతͳඇਖ਼نԽ w தؒςʔϒϧͷ༻ҙͳͲ w αʔόͷεϖοΫΞοϓ #65

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Ͳʔ͠ΐ΋ͳ͍࣌  ΊΜͲ͍࣌͋͘͞ΔΑͶʙ %#ʹ͸ຊ࣭తͳσʔλͷΈೖΕ͍ͨ ͔ͭύϑΥʔϚϯεΛग़͍ͨ͠

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ΩϟογϡͰ*0Λޮ཰Խʂ

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஫ҙ

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ޙड़͢ΔΑ͏ʹΩϟογϡʹΑΔ  ղܾ͸ສೳ͡Όͳ͘໰୊΋͋Δ

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Ωϟογϡͷجຊ

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DBDIF ந৅Խ͞ΕͨΩϟογϡετΞ

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,74ΠϯλʔϑΣʔε ࠷௿ݶͷ

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DBDIFTFU LFZ WBMVF NZWDBDIFHFU LFZ QSJOUWWBMVF DBDIFEFMFUF LFZ DBDIFHFU LFZ VOEFG HFUTFUEFMFUF

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DBDIF͸े෼ʹ଎͍ҽӒҶనᝢ w ΩϟογϡετΞͷ୅දྫ w NFNDBDIFE w 3FEJT w ΞϓϦέʔγϣϯϝϞϦ w ϑΝΠϧFUD w ,74ΠϯλʔϑΣʔεΛར༻͠*0Λޮ཰Խ͢Δ w ࠓճ͸ओʹNFNDBDIFEΛ૝ఆͯ͠࿩͠·͢

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FYQJSF

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DBDIFTFU LFZ WBMVF   NZWDBDIFHFU LFZ σʔλΛอ࣋͢Δ༗ޮظݶΛ ࢦఆग़དྷΔ

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Ωϟογϡύλʔϯ

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ύλʔϯ

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&YQJSFΛ࢖ͬͨ యܕతͳύλʔϯ

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֎෦)551ϦΫΤετͷ ݁ՌΛҰఆ࣌ؒΩϟογϡͤ͞Δ

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TVCHFU@OFXT@FOUSJFT\ NZTFMGTIJGU NZFOUSJFTTFMGDBDIFHFU LFZ SFUVSOFOUSJFTJGFOUSJFT FOUSJFTTFMGGFUDI@OFXT@FOUSJFT TFMGDBDIFTFU LFZ FOUSJFT SFUVSOFOUSJFT ^ LFZʹWBMVF͕ଘࡏ͢Δ͔HFUͰ֬ೝ͢Δ WBMVF͕ଘࡏͨ͠Βͦͷ··ฦ͢ ଘࡏ͠ͳ͍৔߹)551ϦΫΤετΛ૸ΒͤίϯςϯπΛੜ੒ FYQJSFΛࢦఆͯ͠LFZͰίϯςϯπΛTFU͢Δ ίϯςϯπΛฦ٫͢Δ

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ϦεΫ

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FYQJSF ඵ࣌ؒͷؒʹ ֎෦Ͱίϯςϯπ͕ߋ৽͞Εͯ΋ ΞϓϦ্Ͱ͸൓ө͕͞Εͳ͍ ҙਤతͳΩϟογϡͷߋ৽΍ ࡟আ͕ඞཁʹͳͬͯ͘Δ

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Ωϟογϡͷ ίϯτϩʔϧ͸೉͍͠

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Ωϟογϡͷপ΁Α͏ͦ̇͜

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ͱ͜ΖͰ

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3%#.4΁ͷ໰͍߹Θͤͷ৔߹΋ ಉ͡Α͏ʹΩϟογϡग़དྷΔ ͨͩ͠ෳ਺ͷΫΤϦΛΩϟο γϡ͢Δ৔߹LFZͷ؅ཧੜ ੒͕൥ࡶʹͳΔ͕࣌͋Δ Ή͠Ζউखʹ &YQJSFΛ࢖ͬͨ ΩϟογϡΛͯ͠΋Β͍͍ͨ

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ύλʔϯ

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Ҿ਺΍ΫΤϦΛ࢖ͬͨLFZੜ ੒ʹΑΔಁաతΩϟογϡ ύλʔϯ

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ྫ͑͹

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%#*Y$MBTT$VSTPS$BDIFE ͷ৔߹

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No content

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TVC@CVJME@DBDIF@LFZ\ NZ DMBTT TUPSBHF BSHT BUUST !@ NZSFGTUPSBHF@TFMFDU@BSHT@UP@RVFSZ !\BSHT^<> BUUST NZDPOO SFUVSO%JHFTU4)"TIB@IFY 4UPSBCMFOGSFF[F <SFG DPOO\/BNF^ DPOO\6TFSOBNF^]]> ^ ౎౓ͷΫΤϦ΍ίωΫγϣϯ৘ใͳͲΛ  ϋογϡؔ਺΁௨ͯ͠จࣈྻԽͨ͠΋ͷΛLFZͱ͍ͯ͠Δ

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LFZͷੜ੒Λࣗಈతʹߦ͍ ͍ͭͷؒʹ͔&YQJSFϕʔεͷ ΩϟογϡΛ͢Δ ಁաΩϟογϡͷύλʔϯ

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TFMGECTFBSDI FOUSZ \VTFS@JE^ \PSEFS@CZJE FYQJSF^ Ԡ༻͢Ε͹൒ಁաతΩϟογϡػߏ͕࡞ΕΔ FYQJSFͱ͍͏໊લͷϋογϡ஋Λઃఆ͢Δͱࣗಈతʹ ͦͷ͚࣌ؒͩΩϟογϡ͓͍ͯͯ͘͠ΕΔͱ͔ ͨͩ͠%#ଆͷߋ৽ͷ൓ө͸FYQJSFͨ͠ޙʹ͞ΕΔΑʂ

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ύλʔϯ

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ͳΔ΂͘खલͰΩϟογϡͯ͠ ޮ཰Λ্͛Δύλʔϯ

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ϑϩϯτʹ͍ۙͱ͜ΖͰΩϟογϡ ͯ͋͛͠Δͱޮ཰͸Α͍ 3FRVFTU 3FTQPOTF %# "QQMJDBUJPO8FC4FSWFS ΑΓ*0ޮ཰Λ্͛ΒΕΔ

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ྫ͑͹

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JTVDPOҴ㉮ӝԩդՈ㮢॰న⒌஗Ĕ✵㮣 IUUQEIBUFOBOFKQIJEFEFO

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)5.-ࣄલੜ੒44* w αΠυόʔʹʮ࠷ۙͷίϝϯτҰཡʯΛදࣔ w ϙετ࣌ʹ)5.-ΛϨϯμϦϯάͯ͠)5.-ࣗମΛ Ωϟογϡɺදࣔ࣌ʹऔಘͦ͠ͷ··)5.-දࣔ w ϖʔδશମΛΩϟογϡ͢ΔͱશϖʔδͷΩϟογϡ Λഁغ͠ͳͯ͘͸͍͚ͳ͍ͷͰ w ίϝϯτදࣔ෦෼͚ͩΩϟογϡ͠44*ͰύʔπΛ ݺͼग़͢ JODMVEFWJSUVBMSFDFOU@DPNNFOUFE@BSUJDMFT

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ϑϩϯτدΓͷ Ωϟογϡ͸มߋʹऑ͍ w ςϯϓϨʔτͷߏ଄Λม͑ͨ࣌ w ։ൃ͕සൟʹى͜Δ৔߹ʹ࢖͍ʹ͍͘ w ͦͯ͠࠶ར༻ੑʹ΋๡͍͠

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ύλʔϯ͔ΒݟΔ ΩϟογϡͷϙΠϯτ

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Ωϟογϡ͸ॾਕͷ݋ w DBDIF΁ͷ,74ΠϯλʔϑΣʔε͸े෼ʹ଎͍ w Ωϟογϡͷߋ৽ʹ͸ؾΛ࢖Θͳͯ͘͸͍͚ͳ͍ w FYQJSF·Ͱͷظ͕ؒ࢓্༷ແ೉Ͱ͋Δ w ҙਤతʹΩϟογϡΛEFMFUF͢Δ w LFZͷ໊෇͚Λ໌ࣔతʹ΍Δ͔ಁաతʹߦ͏͔ʁ w ͳΔ΂͘ϑϩϯτدΓͰΩϟογϡͤͨ͞ํ͕ߴ଎ w ͱ͸͍͑ΞϓϦέʔγϣϯͷมߋʹऑ͍

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ΦϨΦϨ Ωϟογϡઓུ

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#PLFUFαʔόΞϓϦͷ৔߹

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#PLFUFεϖοΫ w ೥݄ϩʔϯν w ΋͏͙͢ສ%- J04 "OESPJE w Ϙέ ສ݅ w ͓୊ສ݅ w ධՁԯ݅ w ϐʔΫ࣌SFRTTFD

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σʔλετΞͱΩϟογϡͷ جຊઓུ

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044ޓ׵ͷϛυϧ΢ΣΞΛ࢖͏ w "NB[PO8FC4FSWJDFT্ʹΠϯϑϥΛߏங w ͨͩ͠044ޓ׵ͷ*'Λ࣋ͭϛυϧ΢ΣΞͷΈ࢖༻ w "NB[PO3%4"VSPSB w NFNDBDIFE &MBTUJ$BDIF w 3FEJT &MBTUJ$BDIF w &MBTUJDTFBSDI &MBTUJDTFBSDI4FSWJDF w खݩͰͷ࠶ݱੑΛߴΊΔͨΊ

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+PJOΛͳΔ΂͘͠ͳ͍ w ෆมͳΦϒδΣΫτ͕ଟ͍ͷͰ+PJO͢Δίετ͕ແବ w ޙड़ w ΞϓϦέʔγϣϯʹΑΔ w 03.BQQFSϨϕϧͰ+PJO͠ʹ͘͘͢Δ w ҙਤతͳඇਖ਼نԽΛؚΊΔ%#ઃܭ

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ෆมͳϞϊ͸Ωϟογϡ͢Δ w มԽͷগͳ͍ΦϒδΣΫτ͸࠷ॳͷࢀরޙΩϟογϡ w ҎޙͷͦͷΩϟογϡΦϒδΣΫτΛ࢖͍ճ͢ w ਺গͳ͍ߋ৽࣌ʹΩϟογϡΛഁغ͢Δ CPLF PEBJ QIPUP VQEBUF͕ແ͍ ͨ·ʹEFMFUF͕૸Δ

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Ωϟογϡͷཻ౓ w ԿΛΩϟογϡ͢Δ͔ʁ໰୊ w ཻ౓͕খ͍͞Ωϟογϡର৅3PX୯ମ w ཻ౓͕େ͖͍Ωϟογϡର৅ϥϯΩϯάͳͲҰཡ

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3PXͷࢀর࣌͸ϋογϡͰѻ͏ w 3PXΦϒδΣΫτ͡Όͳͯ͘ϋογϡͰѻ͏ w ͦ΋ͦ΋8FC"1*͔ͩΒ+40/Ͱฦ͢͠ w ϋογϡͩͱΩϟογϡ͠΍͍͢ w ͨͩ3PXΦϒδΣΫτΛϑΣον͔ͯ͠Βϋο γϡԽ͍ͯ͠Δ w 3PXຖʹJOqBUFϧʔϧΛΦϒδΣΫτʹҠৡ

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όονΑΓ΋ࢀর৘ใΛΩϟογϡ w ෳࡶͳόονॲཧΛݮΒ͢ํ਑ w ؂ࢹ͕͠ʹ͍͘ʢָͯ͠؂ࢹ͍ͨ͠ʣ w ෳ਺ΧςΰϦʹ·͕ͨΔϥϯΩϯάΛදࣔ w ଟ਺ͷՕॴͷϥϯΩϯάΛόονͰੜ੒͸ආ͚ͨ ͍ʢΊΜͲ͍͘͞ʣ ίϯςϯπΛ༧Ί༻ҙ͢ΔͷͰ͸ͳ͘ ඞཁͱ͞Εͨ࣌ʹΩϟογϡ͓ͯ͘͠

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࣮૷

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ΦϒδΣΫτϕʔεͷ ಁաΩϟογϡ

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CPLF\PEBJ^\QIPUP^\MBSHF@VSM^ ϦϨʔγϣϯઌͷΦϒδΣΫτ ΩϟογϡΛ࣮ݱ͢Δ Ωϟογϡ͔Βऔಘ

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#PLFUF%# QBDLBHF#PLFUF%# VTFQBSFOU5FOH TVCGJOE@XJUI@DBDIF\ NZ TFMG UBCMF XIFSF FYQJSF !@ NZLFZTFMGNBLF@LFZ UBCMF XIFSF GJOE NZEBUBTFMGDBDIFHFU LFZ SFUVSOEBUBJGEBUB NZPCKFDUTFMGTJOHMF UBCMF XIFSF PSSFUVSO EBUBPCKFDUJOGMBUF@DPMVNOT TFMGDBDIFTFU LFZ EBUB FYQJSF SFUVSOEBUB ^ TVCEFMFUF@DBDIF\ ൒ಁաΩϟογϡ ΠϯλʔϑΣʔεΛੜ΍͢

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#PLFUF%#3PX#PLF QBDLBHF#PLFUF%#3PX#PLF TVCJOGMBUF@DPMVNOT\ NZTFMGTIJGU NZEBUBTFMGDPMVNOT EBUB\PEBJ^ TFMGIBOEMFGJOE@XJUI@DBDIF PEBJ \JEEBUB\PEBJ@JE^^ SFUVSOEBUB ^ औಘ࣌ʹϦϨʔγϣϯઌͷ ΦϒδΣΫτΛΩϟογϡ͢Δ

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ԾʹϦϨʔγϣϯઌͷPEBJQIPUP ͕Ωϟογϡ͞Ε͍ͯΔCPLFҰཡΛ औͬͯ͘Δ৔߹ 4&-&$5จҰൃͷΈͰϦϨʔγϣϯઌ ͷΦϒδΣΫτ΋औͬͯ͜ΕΔʂ

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!CPLFTTFMGECTFBSDI CPLF \^ \PSEFS@CZ \JEBTD MJNJU^^ CPLFT<>\PEBJ^\QIPUP^\MBSHF@VSM^ .Z42-4&-&5$5'30.CPLF03%&3#:JE"4$-*.*5 NFNDBDIFEHFUPEBJBCDEFG NFNDBDIFEHFUQIPUPBCDEFG NFNDBDIFEHFUPEBJBCDEFGH NFNDBDIFEHFUQIPUPBCDEFGH NFNDBDIFE͔ΒͷHFUͳͷͰे෼ʹ଎͍ 3%#.4΁ͷෛՙ͸ΫΤϦҰൃͷΈ

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Ωϟογϡͷഁغ w ΦϒδΣΫτͷߋ৽΍࡟আ͕૸ͬͨ৔߹ͷΩϟογϡͷΫϦΞ w LFZੜ੒࣌ͱಉ͡Α͏ʹ03.BQQFS΁ͷΫΤϦΛॻ͘ w ճ਺͕ଟ͘ແ͍ͷͰରԠͰ͖ͯΔ TFMGECEFMFUF@DBDIF PEBJ \JEPEBJ@JE^

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ϥϯΩϯάͱ͔ ҰཡͷΩϟογϡ

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൒ಁաతΩϟογϡΛ࠾༻ w ϞσϧʹDPOE BUUSΛҾ਺ͱͯ͠΋Β͏ϝιο υΛੜ΍͢ྫHFU@TPSUFE@FOUSJFT w BUUSͷϋογϡʹFYQJSFͷ஋͕ೖ͍ͬͯΕ͹ͦͷؒ ͚ͩΩϟογϡͤ͞ΕΔ NZTFMG DPOE BUUS!@ TFMGECTFBSDI CPLF \^ \PSEFS@CZ\SBUF@TVN EFTD MJNJU FYQJSFBUUS\FYQJSF^^^

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ΞϓϦέʔγϣϯຖͷ࢓্༷ Ωϟογϡͯ͠΋Α͚Ε͹ ׆༻Λʂ

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͔͠͠໰୊͕

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ͦͷ໊΋

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5IVOEFSJOH)FSE໰୊

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௨ৗɺΩϟογϡʹ֨ೲ͞ΕΔσʔλ͸ɺͦΕͧΕ୯Ұͷ ੜଘ࣌ؒΛ΋͍ͬͯ·͢ɻ໰୊͸ɺසൟʹΞΫηε͞ΕΔ Ωϟογϡσʔλ͕ΤΫεύΠΞͨ͠ࡍʹൃੜ͠·͢ɻσʔ λ͕ΤΫεύΠϠͨ͠ॠ͔ؒΒɺฒߦʹ૸Δෳ਺ͷΞϓϦ έʔγϣϯϩδοΫ͕ϛεώοτΛݕ஌͠ɺ͍ͣΕ͔ͷϓ ϩηε͕ΩϟογϡσʔλΛ֨ೲ͢Δ·ͰͷؒɺಉҰͷϦ ΫΤετ͕ଟ਺ɺόοΫΤϯυʹඈΜͰ͠·͏ͷͰ͢ɻ IUUQMBCTDZCP[VDPKQCMPHLB[VIPBSDIJWFTDBDIF@BOE@UIVOEFSJOH@IFSEQIQ

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ਤղ

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FYQJSF े෼ʹ଎͍ े෼ʹ଎͍ FYQJSFͨ͠ॠؒ ίϯςϯπͷੜ੒ ΩϟογϡͷTFU ͜ͷظؒʹΞΫηε͕ू தͯ͠ίϯςϯπੜ੒͕ ଟॏʹ૸Δ Cache Thundering Herd Problem

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๭%#ͷ$16ෛՙ

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٧Ή

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٧Ή

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٧Ή

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No content

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ղܾࡦ

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&BSMZ&YQJSFT$BDIF CZLB[FCVSP IUUQCMPHOPNBETDBGFKQNFNDBDIFEUIVOEFSJOHIFSEIUNM

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࢓૊Έ w ௨ৗͷΩϟογϡ&YQJSF͕୹͍Ωϟογϡ w ্ه̎ͭΛNFNDBDIFEʹTFU w HFU࣌ʹͱ͋Δ֬཰Ͱ&YQJSF͕୹͍ํͷΩϟογϡ Λݟʹ͍͘ w Ұఆͷ֬཰ͰΩϟογϡ͕ૣ͘੾ΕΔ w Ұ౓ʹίϯςϯπੜ੒Ͱෛՙ͕͔͔ΔͷΛආ͚Δ w Ωϟογϡͷ༰ྔ͸ഒඞཁ

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QBDLBHF&BSMZ&YQJSFT$BDIF TVCTFU@FF\ NZ TFMG LFZ WBMVF FYQJSFT !@ TFMGDBDIFTFU LFZ WBMVF FYQJSFT TFMGDBDIFTFU LFZFF WBMVF FYQJSFTTFMG FBSMZ@FYQJSFT ^ TVCHFU@FF\ NZ TFMG LFZ !@ JG JOU SBOE TFMGSBUJP \ SFUVSOTFMGDBDIFHFU LFZFF ^ TFMGDBDIFHFU LFZ TFMGDBDIFHFU LFZFF ^ TVCEFMFUF@FF\ NZ TFMG LFZ !@ TFMGDBDIFEFMFUF LFZ TFMGDBDIFEFMFUF LFZFF ^ ࣌ؒࠩͰೋॏʹLFZΛTFU ಛఆͷׂ߹Ͱ୹͍DBDIFΛHFU

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௨ৗ͸͜ͷରࡦͰ0,ʂ

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ͨͩ͠

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ϐʔΫ࣌ʹ͸·ͩߥΕΔ ॠఀ͕ى͜Δ

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ਏ͍

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ݪҼ ίϯςϯπੜ੒͕஗͍ ύϥϝʔλͷ஋͕࠷దͰ͸ͳ͍ ΞΫηε͕͋Δఔ౓ଟ͍

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ͦ͜Ͱ

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-B[Z$BDIF ΦϨΦϨ

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࢓૊Έ w ௨ৗͷΩϟογϡ&YQJSF͕௕͍Ωϟογϡ w ͦΕʹՃ͑ͯίϯςϯπੜ੒࣌͸ϑϥά w ্ه͕ͭNFNDBDIFEʹηοτ͞ΕΔ w ௨ৗͷΩϟογϡ͕&YQJSFͨ࣌͠ʹϑϥάʹਅ஋ΛTFU w ௨ৗΩϟογϡ͕ۭ͔ͭϑϥά͕ਅͷ৔߹ʹ&YQJSF͕ ௕͍ΩϟογϡΛฦ͢ w ͦͷؒʹίϯςϯπੜ੒ɺͦͷޙΩϟογϡΛTFUɺϑ ϥάΛEFMFUF͢Δ

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௨ৗΩϟογϡ͕͋Δίϯςϯπੜ੒ͯ͠ͳ͍ ௨ৗΩϟογϡΛฦ٫ ௨ৗΩϟογϡ͕ͳ͍ίϯςϯπੜ੒ͯ͠ͳ͍ ϑϥάΛηοτ ίϯςϯπΛੜ੒ ΩϟογϡΛηοτϑϥάΛ࡟আ ੜ੒ͨ͠௨ৗΩϟογϡΛฦ٫ ௨ৗΩϟογϡ͕ͳ͍ίϯςϯπੜ੒ͯ͠Δ &YQJSF௕ΊͷΩϟογϡΛฦ٫

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QBDLBHF#PLFUF$BDIF-B[Z$BDIF TVCHFU\ NZ TFMG LFZ !@ NZEBUBTFMGDBDIFHFU LFZ NZGMBHTFMGDBDIFHFU LFZGMBH JG EBUBGMBH \ TFMGTFU LFZGMBH EPUBTL TFMGTFU LFZ EBUB TFMGFYQJSF TFMGTFU LFZ EBUB TFMGFYQJSFTFMGMB[Z@UJNF TFMGEFMFUF LFZGMBH ^ SFUVSOEBUB]]TFMGDBDIFHFU LFZMB[Z ^ ࢀর࣮૷ ϑϥάΛHFU ϑϥάΛTFUͯ͠ ίϯςϯπੜ੒ ௨ৗΩϟογϡ͕ۭͳΒ͹MB[ZDBDIFΛฦ٫

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݁Ռ͕Ұ໨ྎવ

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۪௚ʹॻ͍ͨΒ͏·͍ͬͨ͘ ഉଞॲཧͱ͔ͯ͠ͳ͍͚Ͳ

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͜ͷΑ͏ʹΞϓϦʹΑͬͯ Ωϟογϡઓུ͸༷ʑʂ

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ͦΖͦΖ·ͱΊ

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Ωϟογϡઓུʹ͍ͭͯ࿩͠·ͨ͠ w Ωϟογϡͷ໨త΍جຊతͳ࢓૊Έ w ൒ ಁաΩϟογϡͷ࣮૷ͱϦεΫ w ΦϨΦϨ Ωϟογϡઓུ w 5IVOEFSJOH)FSE໰୊ͱͷઓ͍ ΞϓϦέʔγϣϯʹΑͬͯઓུ͕มΘͬͯ͘Δ

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օ͞ΜͳΓͷઓུͰ ΩϟογϡΛ࢖ͬͯԼ͍͞