計画的に負荷リスクを排除するためのキャパシティプランニング

by akano yuki

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ܭըతʹෛՙϦεΫΛഉআ͢ΔͨΊͷ ΩϟύγςΟϓϥϯχϯά !1 ੺໺༟ت

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!2 ͔Βλοϓϧ஀ੜʹ43&ͱͯ͠ࢀՃ ݩʑόοΫΤϯυΤϯδχΞͰ  ΞόλʔαʔϏεɺອը&$ɺϔϧεέΞΞϓϦͳͲ ʹؔΘ͍ͬͯ·ͨ͠ ΑΖ͓͘͠ئ͍͠·͢ ੺໺༟ت ͔͋ͷΏ͏͖ ࣗݾ঺հ

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!3 w झຯΛ͖͔͚ͬʹͨ͠ϚονϯάΞϓϦ w ΧʔυΛϑϦοΫ͢Δ6*͕ಛ௃

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λοϓϧ43&ͷϏδϣϯ ҆৺ײʢηΩϡΞϕʔεʣ͕͋Δͱɺਓ͸େ͖ͳνϟϨϯδΛͯ͠੒௕Ͱ͖Δ ҆৺ײʢηΩϡΞϕʔεʣͳ͠ʹνϟϨϯδΛଅ͢ͷ͸ແ੹೚ λοϓϧͷηΩϡΞϕʔεͱͳΓλοϓϧΛ੒௕ͤ͞Δ

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λοϓϧ43&͕ෛՙతͳ؍఺ͰͷηΩϡΞϕʔεͱͳΔͨΊͷऔΓ૊Έ ʲࠓճ࿩͢͜ͱͷ֓ཁʳ

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ʲऔΓ૊Ή͜ͱʹͳ͖͔͚ͬͨͬʳ w ߴෛՙʹΑΔো֐͕ൃੜ  Πϕϯτ։࢝ͷ164)௨஌ΛىҼʹେྔͷΞΫηε͕ൃੜ  ෮چʹ͕͔͔࣌ؒΓɺαʔϏεӨڹ΋େ͖͔ͬͨ w ෛՙతͳෆ҆ΛऔΓআ͚ͳ͍ঢ়گ  ܦݧଇΛݩʹͨ͠ෛՙνΣοΫ͔͠Ͱ͖ͳ͍  ෛՙϨϏϡʔΛ͢Δ࢓૊ΈΛ࡞ΔͨΊʹγεςϜΩϟύγ ςΟͷ೺Ѳ͕ඞཁ

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ʲΩϟύγςΟϓϥϯχϯάͷΰʔϧʳ w ܧଓతʹγεςϜΩϟύγςΟΛ೺ѲͰ͖Δ w ෛՙϨϏϡʔͷखॱͱ࣮ࢪϑϩʔ͕੔උ͞Ε͍ͯΔ ঢ়ଶΛ໨ࢦͯ͠ΩϟύγςΟϓϥϯχϯάʹऔΓ૊Ή͜ͱʹ͠·ͨ͠

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w ܧଓతʹγεςϜΩϟύγςΟΛ೺Ѳ͢ΔͨΊʹ  ఆظతʹෛՙࢼݧΛ࣮ࢪͰ͖Δ؀ڥͮ͘Γ  ෛՙࢼݧΛ࣮ࢪ͢Δϑϩʔͷ੔උ  ෛՙࢼݧͷऴྃ৚݅ʹ࢖༻͢ΔͨΊʹϨΠςϯγ4-0ΛఆΊΔ w ෛՙϨϏϡʔखॱͱϑϩʔͷ੔උ  ࢪࡦ୯ҐͰͷϨϏϡʔϑϩʔ੔උ  164)௨஌ͷ഑৴ઃఆ΁ͷϨϏϡʔϑϩʔ੔උ ʲ࣮ࡍʹߦͬͨΞΫγϣϯʳ

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ʲෛՙࢼݧ؀ڥΛߏங͢Δ໨తʳ w ຊ൪ͱಉ౳ͷࢼݧ؀ڥͰෛՙࢼݧΛ࣮ࢪ͢Δ͜ͱͰຊ൪؀ڥ ͷγεςϜΩϟύγςΟΛଌఆ w ఆظతʹෛՙࢼݧΛ࣮ࢪ͢Δ͜ͱͰܧଓతʹγεςϜΩϟύ γςΟΛ೺Ѳ͢Δ

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ʲ࡞੒ͨ͠ෛՙࢼݧ؀ڥͷߏ੒ʳ

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w ඞཁͳΦϖϨʔγϣϯͷεΫϦϓτԽ  εΫϦϓτΛ࣮ߦ͢Δ͚ͩͰ࣮ࢪ४උ͕׬ྃ͢Δ w ෛՙࢼݧ؀ڥΛ࢖༻͢Δखॱॻͷ࡞੒ ʲ୭Ͱ΋࢖͑Δ؀ڥʹ͢ΔͨΊʹʳ

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ʲ࣮ࢪ͍ͯ͠Δෛՙࢼݧͷछྨʳ w ݶք஋Λ೺Ѳ͢ΔͨΊͷϩʔυςετ w ݶք஋Λ೺Ѳ͢ΔͨΊͷεύΠΫςετ w ੑೳྼԽΛνΣοΫ͢Δςετ ఆظ࣮ࢪ ΤϯδχΞ൑அ

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ʲݶք஋Λ೺Ѳ͢ΔͨΊͷϩʔυςετʳ

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໨త  ࠷େεέʔϧ "1* ͷঢ়ଶͷ࠷େεϧʔϓοτΛ೺Ѳ͢Δ ࢼݧํ๏  εέʔϧΞ΢τͤͨ͞"1*ʹରͯ͠؇΍͔ʹෛՙΛ্͍͛ͯ͘ ऴྃ৚݅  ࢦඪʹ͍ͯ͠ΔΤϯυϙΠϯτ͕ϨΠςϯγ4-0Λຬ͍ͨͯ͠ͳ͍ Ϩϙʔτʹه࿥  ϨϙʔτϑΥʔϚοτΛ༻ҙ ʲݶք஋Λ೺Ѳ͢ΔͨΊͷϩʔυςετʳ

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ࢼݧ࣌ͷγεςϜߏ੒  UFSSBGPSNͷϨϙδτϦʹλάଧͪ ࢼݧ࣌ͷΞϓϦέʔγϣϯͷঢ়ଶ  ௚ۙͷϦϦʔελά γεςϜͷݶքεϧʔϓοτ  ऴྃ৚݅Λຬͨͨ͠λΠϛϯάͰͷεϧʔϓοτ γεςϜϘτϧωοΫ  (JU)VCͷ*TTVFͱͯ͠ه࿥ ʲϨϙʔτʹه࿥͍ͯ͠Δ಺༰ʳ

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ʲݶք஋Λ೺Ѳ͢ΔͨΊͷεύΠΫςετʳ

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໨త  ͲΕ͘Β͍ͷεύΠΫΞΫηεʹ଱͑ΒΕΔ͔೺Ѳ͢Δ ࢼݧํ๏  ݻఆͨ͠&$4λεΫ਺ຖʹεύΠΫΞΫηεΛ͔͚ͯଌఆ ऴྃ৚݅  ࢦඪʹ͍ͯ͠ΔΤϯυϙΠϯτ͕ϨΠςϯγ4-0Λຬͨ͞ͳ͘ͳͬͨ Ϩϙʔτʹه࿥  ϨϙʔτϑΥʔϚοτΛ༻ҙ

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&$4λεΫ਺ຖͷεύΠΫݶք஋Λଌఆ ʲࢼݧํ๏ʹ͍ͭͯʳ

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w 4DBMJOH1PMJDZ͕ಥൃతͳΞΫηεΛ૝ఆ͍ͯ͠ͳ͍ઃܭ  $MPXE8BUDIϝτϦΫεͷղ૾౓͕෼  &$όοΫΤϯυ&$4ͳͷͰλεΫىಈ͕஗ΕΔ৔߹͕͋Δ w ༧ఆ͞ΕͨεύΠΫΞΫηε΁ͷରԠΛ༏ઌ  164)௨஌ɺن໛ͷେ͖͍13ͳͲ ʲ͜ͷࢼݧํ๏ʹ͍ͯ͠Δཧ༝ʳ

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ࢼݧ࣌ͷγεςϜߏ੒  UFSSBGPSNͷϨϙδτϦʹλάଧͪ ࢼݧ࣌ͷΞϓϦέʔγϣϯͷঢ়ଶ  ௚ۙͷϦϦʔελά λεΫ਺ຖͷݶքεϧʔϓοτ  ऴྃ৚݅Λຬͨͨ͠λΠϛϯάͰͷεϧʔϓοτ γεςϜϘτϧωοΫ  (JU)VCͷ*TTVFͱͯ͠ه࿥

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SFRTFD SFRTFD SFRTFD ࢒ΓͷSFRTFD·ͰͷεύΠΫΞΫηε·Ͱ͸଱͑ΒΕΔ

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໨త  ϩδοΫ΍ઃܭͷมߋͰύϑΥʔϚϯε͕ྼԽ͢Δ͔Λ ֬ೝ͢Δ ςετͷ࣮ࢪ͸όοΫΤϯυΤϯδχΞʹ೚͍ͤͯΔ ʲੑೳྼԽΛνΣοΫΛ͢Δςετʳ

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࣮ࢪલͷςετܭըͷϨϏϡʔ  ࣮ࢪཧ༝ ੑೳൺֱํ๏ ྼԽνΣοΫ߲໨ͳͲ ςετ݁ՌͷϨϏϡʔ  ϨϙʔτΛఏग़ͯ͠΋Β͍ϦϦʔεՄೳ͔ϨϏϡʔ ʲ43&ଆͰ΍Δ͜ͱʳ

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w 43&͕ܦݧଇΛݩʹܾͯ͠ΊͨϨΠςϯγ4-0͸͕͋ͬͨ  69Λߟྀͨ͠4-0Ͱ͸ͳ͔ͬͨ  ෛՙࢼݧͷ݁ՌΛϏδωεαΠυͱͷ࿈ܞʹ΋࢖༻͍ͨ͠  ͢Ͱʹ͋ͬͨ4-0Ͱ͸αʔϏε΁ͷӨڹ͕ΠϝʔδͰ͖ͳ͍ ʲͳͥඞཁʹͳ͔ͬͨʳ

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ʲͲ͏΍ͬͯϨΠςϯγ4-0ΛܾΊ͔ͨʳ εϩʔμ΢ϯ%&7؀ڥ "1*஗ԆମײνΣοΫձΛ࣮ࢪ Ϧʔμʔɾ1.ͷํ΋ࢀՃ

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ʮશମϦΫΤετͷϨΠςϯγͷQ͕NTҎԼͰ ϲ݄ͷ͏ͪҎ্Քಇʯ ʲ݁Ռʳ ࣮ࡍʹ͜ͷ4-0Ͱӡ༻Λ͍ͯ͠·͢

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ʲࢪࡦ୯ҐͰͷϨϏϡʔϑϩʔ੔උʳ w ໨త  ࢪࡦͷاըஈ֊Ͱࢪࡦͷ֓ཁͱࢪࡦͷૂ͍ʹରͯ͠ෛՙత ʹ໰୊ͳ͍͔൑அ w طଘͷࢪࡦ։ൃϑϩʔʹෛՙϨϏϡʔΛ૊ΈࠐΉ  ϓϥϯφʔͷํʹώΞϦϯά͠ͳ͕ΒਐΊͨ

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ʲݩʑͷࢪࡦ։ൃϑϩʔʳ ࢛൒ظͷઓུ͕ܾ·Δ ࢛൒ظͷࢪࡦͷϩʔυϚοϓ͕ܾ·Δ ΤϯδχΞ૬ஊ ࢓༷ձٞ ࢓༷'*9ɾΞαΠϯ ΦϦΤϯ ։ൃ ϦϦʔε ࢪࡦ୯Ґ

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ʲෛՙϨϏϡʔΛ૊ΈࠐΜͩࢪࡦ։ൃϑϩʔʳ ࢛൒ظͷઓज़͕ܾ·Δ ࢛൒ظͷࢪࡦͷϩʔυϚοϓ͕ܾ·Δ ࢪࡦҰཡΛ43&͕ෛՙతͳνΣοΫ ΤϯδχΞ૬ஊ ୲౰ΤϯδχΞ͕ෛՙϨϏϡʔ ࢓༷ձٞ ࢓༷'*9ɾΞαΠϯ ΦϦΤϯ ։ൃ ϦϦʔε

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w ໌Β͔ʹݫͦ͠͏ͳࢪࡦ͕ͳ͍͔ΛνΣοΫ  ۩ମతͳ৘ใ͕গͳ͍ͷͰܦݧଇͱମײతͳνΣοΫ w ؾʹͳΔࢪࡦ͕͋Δ৔߹͸ϓϥϯφʔʹώΞϦϯά ʲࢪࡦҰཡΛ43&͕ෛՙతͳνΣοΫʳ

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ʲෛՙϨϏϡʔΛ૊ΈࠐΜͩࢪࡦ։ൃϑϩʔʳ ࢛൒ظͷઓज़͕ܾ·Δ ࢛൒ظͷࢪࡦͷϩʔυϚοϓ͕ܾ·Δ ࢪࡦҰཡΛ43&ʹڞ༗ͯ͠ෛՙతͳνΣοΫΛґཔ ΤϯδχΞ૬ஊ ୲౰ΤϯδχΞ͕ෛՙϨϏϡʔ ࢓༷ձٞ ࢓༷'*9ɾΞαΠϯ ΦϦΤϯ ։ൃ ϦϦʔε

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w ࢪࡦ୯ҐͰෛՙతʹ໰୊͕ͳ͍͔ΛϨϏϡʔ w ࢪࡦͷ୲౰ΤϯδχΞ͕࣮ࢪ  43&ଆͰෛՙϨϏϡʔखॱॻΛ࡞੒ ʲ୲౰ΤϯδχΞ͕ෛՙϨϏϡʔʳ

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ϨϏϡʔʹඞཁͳ৘ใΛϓϥϯφʔʹ༻ҙͯ͠΋Β͏ ୲౰ΤϯδχΞ͕૿Ճ͢ΔΞΫηε਺ͷ૝ఆΛग़͢ ෛՙࢼݧ݁ՌͷΩϟύγςΟͱൺֱ ʲෛՙϨϏϡʔखॱͷྲྀΕʳ

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w ࢪࡦͷ֓ཁ w ࢪࡦͷ૝ఆޮՌ  Կ͕ͲΕ͘Β͍૿Ճ͢Δ͔  ʮϢʔβ୯ҐͷΧʔυϑϦοΫ਺͕ʓʓ૿Ճʯ ʲϨϏϡʔʹඞཁͳ৘ใΛ༻ҙͯ͠΋Β͏ʳ

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ϨϏϡʔʹඞཁͳ৘ใΛϓϥϯφʔʹ༻ҙͯ͠΋Β͏ ୲౰ΤϯδχΞ͕૿Ճ͢ΔΞΫηε਺ͷ૝ఆΛग़͢ ෛՙࢼݧ݁ՌͷΩϟύγςΟͱൺֱ ʲෛՙϨϏϡʔखॱͷྲྀΕʳ

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%"6૿Ճ͔ΧʔυͷϑϦοΫ਺ͷ૿ՃΛૂ͍ͱͨ͠ࢪࡦͷΈ ʲෛՙϨϏϡʔΛ࣮ࢪ͢Δࢪࡦͷ৚݅ʳ w શͯͷࢪࡦΛϨϏϡʔ͢Δͷ͸ίετ͕͔͔Γ͗͢Δ w γεςϜෛՙ΁ͷӨڹ͕େ͖͍ࢪࡦͷΈʹߜΔ ͱ͍͏ཧ༝Ͱ

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ʲ164)௨஌ͷ഑৴ઃఆʹର͢ΔෛՙϨϏϡʔʳ w ໨త  ෛՙతʹ࠷దͳ഑৴εέδϡʔϧͰ164)௨஌Λ഑৴͢Δ  ϓϥϯφʔͷر๬Λ࣮ݱͭͭ͠αʔϏεΛεϩʔμ΢ϯͤ͞ͳ͍ w 43&͕഑৴ઃఆΛෛՙϨϏϡʔ

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ϨϏϡʔʹඞཁͳ৘ใΛϓϥϯφʔʹ༻ҙͯ͠΋Β͏ ഑৴਺ͱྲྀೖظ଴஋͔Β૝ఆྲྀೖ਺Λग़͢ ૝ఆྲྀೖ਺͔ΒඞཁʹͳΔεϧʔϓοτΛग़͢ εύΠΫςετͷ݁ՌΛݩʹ഑৴εέδϡʔϧΛܾఆ͢Δ ʲෛՙϨϏϡʔखॱͷྲྀΕʳ

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w ഑৴Ϣʔβ਺ w ഑৴͍ͨ࣌ؒ͠ଳ w ྲྀೖظ଴஋   164)ىҼͰྲྀೖͯ͘͠Δظ଴஋ ʲϨϏϡʔʹඞཁͳ৘ใΛ༻ҙͯ͠΋Β͏ʳ

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ʲඞཁʹͳΔεϧʔϓοτΛग़͢ʳ ʮʓʓϢʔβͷྲྀೖʹରͯ͠ϑϦοΫͷΤϯυϙΠϯτ͕ ʓʓSFRTTFDεϧʔϓοτඞཁ Ϣʔβ୯ҐͷϑϦοΫ਺܏޲ ྲྀೖϢʔβ਺ ඞཁͳεϧʔϓοτ ʓʓreq/sec

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ʲ഑৴εέδϡʔϧΛܾఆ͢Δʳ w εύΠΫςετͷ݁Ռ͔ΒඞཁʹͳΔ&$4λεΫ਺Λݟੵ΋Δ w ݶքεϧʔϓοτΛ௒͍͑ͯΔ৔߹͸164)Λ෼ׂ͢Δ w &$4ʹεέδϡʔϧϕʔεͷ"VUP4DBMJOHΛઃఆ͢Δ 

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ʲ164)௨஌ͰඞཁʹͳΔ&$4λεΫ਺ʳ λεΫ਺ຖͷݶքεϧʔϓοτ݁ՌΛ֬ೝ ඞཁͳεϧʔϓοτ ྲྀೖϢʔβ਺ ඞཁͳλεΫ਺ ʓʓreq/sec

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ʲΞΫγϣϯΛߦ͖ͬͯͨ݁Ռʳ w 164)΍ࢪࡦϦϦʔεͰ4-0ҧ൓͢ΔΑ͏ͳεϩʔμ΢ϯ͕΄ͱΜ Ͳى͖ͳ͘ͳͬͨ w ΤϯδχΞओಋͰؾܰʹෛՙࢼݧΛ࣮ࢪ͢Δ͜ͱ͕Ͱ͖ΔΑ͏ʹ ͳͬͨ w νʔϜͷෛՙతͳෆ҆ΛऔΓআ͘͜ͱ͕Ͱ͖ͨ w 43&͕ෛՙతͳʮηΩϡΞϕʔεʯͱͯ͠ػೳͰ͖ΔΑ͏ʹͳͬͨ

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w ϨϏϡʔϑϩʔ΁ͷϑΟʔυόοΫͱվળ w ෛՙࢼݧ؀ڥͷεϖοΫΛௐ੔ͯ͠࢖༻Ͱ͖ΔΑ͏ʹվળ w ෛՙࢼݧͰݟ͔ͭͬͨϘτϧωοΫΛܧଓతʹղফ͢Δ࢓ ૊ΈΛ੔͑Δ ʲࠓޙͷల๬ͱվળʳ

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λοϓϧͷ43&͸ʮࣄۀܭըϦεΫͷഉআʯͱ͍͏ϛογϣϯ Λ࣋ͬͯ׆ಈ͍ͯ͠ΔͷͰ ෛՙతͳ؍఺Ҏ֎ͷϦεΫഉআʹ΋औΓ૊ΜͰ͍͖͍ͨͱࢥ͍ͬͯ·͢

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͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ !57