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副作用の少ないキャッシュ戦略
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mnuma
December 19, 2017
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副作用の少ないキャッシュ戦略
mnuma
December 19, 2017
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Transcript
෭࡞༻ͷগͳ͍Ωϟογϡઓུ !4IJOKVLV-5
!NOVNB@ ɾגࣜձࣾϚΫΞέ ɾαʔόαΠυΤϯδχΞ
8FCΞϓϦέʔγϣϯ lΩϟογϡzʹΑΔߴԽ
Ωϟογϡઓུ
Ωϟογϡઓུ ΞΫηεٸ૿ 57ɺQVTI௨ ॏ͍ΫΤϦ ֎෦ґଘ
8FCΞϓϦέʔγϣϯΩϟογϡػߏ
8FCΞϓϦέʔγϣϯΩϟογϡػߏ Ωϟογϡઓུͱ ͦͷύλʔϯ IUUQTTQFBLFSEFDLDPNNP[OJPOQBUUFSOBOETUSBUFHZPGXFCBQQMJDBUJPODBDIJOH
8FCΞϓϦέʔγϣϯΩϟογϡػߏ ϦΫΤετͷߴԽ ෛՙܰݮ IUUQTTQFBLFSEFDLDPNNP[OJPOQBUUFSOBOETUSBUFHZPGXFCBQQMJDBUJPODBDIJOH
ΩϟογϡʹΑΔ෭࡞༻
ΩϟογϡʹΑΔ෭࡞༻ ෳࡶͳΩϟογϡίʔυ ετϨʔδͱͷಉظ Ωϟογϡύʔδͷߟྀ -36ͷߟྀ Ωʔͷઃܭ ςετɾσόοάͷ෭࡞༻
CACHE
ϚΠΫϩΩϟογϯά
෭࡞༻ͷͳ͍ গͳ͍ Ωϟογϡ
.JDSPDBDIJOH ظͰΩϟογϡ͢Δ ͱ͍͏ίϯηϓτ ෭࡞༻ͷͳ͍ গͳ͍ Ωϟογϡ IUUQTXXXOHJOYDPNCMPHCFOFpUTPGNJDSPDBDIJOHOHJOY
෭࡞༻ͷͳ͍ গͳ͍ Ωϟογϡ zϚΠΫϩΩϟογϯάͱɺίϯςϯπΛඇৗʹ࣌ؒʢ͓ͦΒ͘ඵఔʣΩϟογϡ ͢ΔΩϟογϯάख๏Ͱ͢z IUUQTXXXOHJOYDPNCMPHCFOFpUTPGNJDSPDBDIJOHOHJOY
ඵఔͷΩϟογϡΛ ࠐΉ͚ͩͰޮՌత ෭࡞༻ͷͳ͍ গͳ͍ Ωϟογϡ
.BLVBLFͰͷΩϟογϡઓུ
.BLVBLFͰͷΩϟογϡઓུ ύϒϦοΫͳ"1*αʔόͷ ΞΫηεٸ૿ɺॏ͍ΫΤϦͷରࡦͱͯ͠ ΩϟογϡઓུΛಋೖ
(PͰͷΩϟογϡઓུ .JDSPDBDIJOH
(PͰͷΩϟογϡઓུ HSPVQDBDIFTJOHMFqJHIU QBUSJDLNOHPDBDIF HJODPOUSJCDBDIF
(PͰͷΩϟογϡઓུ HSPVQDBDIFTJOHMFqJHIU
HSPVQDBDIFTJOHMFqJHIU ؔͷಉ࣌ݺͼग़͠Λ HSPVQ%P ͰΩϟογϡ͢Δɻ SFQPNPEFMT/FX3FQPTJUPSZ W FSSHSPVQ%P IPHFIPHF GVOD
JOUFSGBDF\^ FSSPS \ SFUVSOSFQP(FU)PHFIPHFT ^ SFTVMUTW <>NPEFMT)PHF
(PͰͷΩϟογϡઓུ QBUSJDLNOHPDBDIF
QBUSJDLNOHPDBDIF #SPLFSͳΈͷ࣮ݱɻ HPDBDIF(FU 4FU ͰΩϟογϡͷήοτηοτɻ Ωϟογϡ͔Βऔಘ JGSFTVMUT FYJTUTHPDBDIF(FU DBDIF@LFZ FYJTUT\
Ωϟογϡʹͳ͚Ε%#͔Βऔಘ WBSFSSFSSPS SFTVMUT FSSSFQP(FU)PHFIPHFT ʜ Ωϟογϡʹηοτ HPDBDIF4FU DBDIF@LFZ SFTVMUT UJNF%VSBUJPO UJNF.JOVUF ^FMTF\ SFTVMUTSFTVMUT <>NPEFMT)PHFIPHF ^
QBUSJDLNOHPDBDIF #SPLFSͳΈͷ࣮ݱɻ HPDBDIF(FU 4FU ͰΩϟογϡͷήοτηοτɻ
(PͰͷΩϟογϡઓུ HJODPOUSJCDBDIF
HJODPOUSJCDBDIF GVOD4FUVQ H HJO3PVUFS(SPVQ \ ΩϟογϡετΞΛઃఆ TUPSFQFSTJTUFODF/FX*O.FNPSZ4UPSF UJNF.JOVUF
H(&5 IPHF DBDIF$BDIF1BHF TUPSF UJNF4FDPOE )PHF ^ ϨεϙϯεΛDBDIF$BDIF1BHF Ͱ Ωϟογϡ͢Δ
HJODPOUSJCDBDIF ϖʔδϨεϙϯε ίϯςϯπ ͷΩϟογϡ 63-ϕʔεͷΩʔઃܭ '8తͳಋೖͷखܰ͞ HJOϕʔε
HJODPOUSJCDBDIF ࠷ऴతʹͪ͜ΒΛ࠾༻ ΤϯυϙΠϯτຖʹඵɺPS ఔͷظΩϟογϡΛಋೖ
HJODPOUSJCDBDIF ಋೖ͕εϜʔζ HJOϕʔε Ωʔઃܭͷߟྀ͠ͳ͍ 63* ΫΤϦύλϝʔλ ಉ࣌ϦΫΤετͷෛՙܰݮ ςετ࣌ΩϟογϡΘͳ͍ͳͲରࡦ
DPOUSJCVUF HJODPOUSJCDBDIF
·ͱΊ
ΩϟογϡޮՌత͕ͩ෭࡞༻ͷ͋Δػߏɻ ෭࡞༻Λ͑ͨϚΠΫϩΩϟογϯά ͱ͍͏ίϯηϓτΛ׆༻ɻ ·ͱΊ