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[JTF2021] 結局インデックスってなんなんですか？/lets-learn-about-b-tree-index

B84123138372542a55401c92b170b528?s=47 hassaku63
July 18, 2021
Technology
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[JTF2021] 結局インデックスってなんなんですか？/lets-learn-about-b-tree-index

JTF2021 登壇資料。

登壇後記としてレポート記事書きました。
https://blog.serverworks.co.jp/2021/07/19/145409

B84123138372542a55401c92b170b528?s=128

hassaku63

July 18, 2021
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Transcript

  1. ݁ہΠϯσοΫεͬͯͳΜͳΜͰ͔͢ʁ 1PTUHSF42-ͷ࢓૊Έ͔ΒΠϯσοΫεͷཧղΛਂΊΔ +VMZ5FDI'FTUB !IBTTBLV

  2. 4QFBLFS IBTTBLV $PSQPSBUF&OHJOFFSBU4FSWFSXPSLT$P -UE 
 5XJUUFS!IBTTBLV@ (JU)VCIBTTBLV

  3. 4QFBLFS w 4UFQ'VODUJPOT -BNCEB w 4FSWFSMFTT'SBNFXPSL w 1ZUIPO w 4BMFTGPSDF

    w ۀ຿ϑϩʔվળʢόοΫΦϑΟεܥத৺ʣ

  4. ͳͥɺࠓ೔͜͜ʹ͍Δͷ͔ w ʮશવΘ͔Βͳ͍ɻԶͨͪ͸งғؾͰʢུʣʯঢ়ଶΛগ͠Ͱ΋୤͍ͨ͠ w ֓ཁ͘Β͍͸஌ͬͯΔͭ΋ΓͰ͍Δ͚ΕͲʜ w ೔ৗۀ຿Ͱ3%#ͱͷ઀఺͕গͳ͍ w ࣗ෼ࣗ਎͕ʮࠓ͞Βฉ͚ͳ͍ʯͱࢥͬͯΔωλΛΞ΢τϓοτ͔ͨͬͨ͠ w

    ಉؔ͡৺Λ࣋ͭਓ͕Կਓ͔͸͍ΔͷͰ͸ʁ w ͋ΘΑ͘͹ποίϛΛ௖ଷ͍ͨ͠ w ৲ʹՐΛ͚ͭͳ͍ͱษڧ͕ਐ·ͳ͍ʜ

  5. ͓࿩͢͠Δ͜ͱʗ͠ͳ͍͜ͱ w ࿩͢͜ͱ w ΠϯσοΫεΛར༻͢ΔϞνϕͷ͓͞Β͍ͱɺ#5SFFͷجຊݪཧ w ΠϯσοΫε͕ػೳ͠ͳ͍έʔε w 1PTUHSF42-ͷΠϯσοΫεʗςʔϒϧͷϑΝΠϧߏ଄ w

    ࿩͞ͳ͍͜ͱ w #5SFFҎ֎ͷΠϯσοΫε w ෳ߹ΠϯσοΫε w +PJO͕བྷΉΫΤϦ w ΫΤϦΦϓςΟϚΠβ

  6. ΠϯσοΫεͷجຊ

  7. ͳͥΠϯσοΫεΛ࢖͏ͷ͔ ʮૣ͘ʯσʔλʹΞΫηε͢Δ

  8. ͳͥΠϯσοΫεΛ࢖͏ͷ͔ ʮૣ͘ʯσʔλʹΞΫηε͢Δ w Կͱൺ΂ͯʁ w Ͳ͏ͯ͠ૣ͘ͳΔʁ

  9. ͳͥΠϯσοΫεΛ࢖͏ͷ͔ ʮૣ͘ʯσʔλʹΞΫηε͢Δ w Կͱൺ΂ͯʁɹˠɹϑϧεΩϟϯ w Ͳ͏ͯ͠ૣ͘ͳΔʁɹˠɹΞΫηεͷํ๏

  10. ʮૣ͘ʯͳΔݪཧ JE OBNF BHF TFY  BMJDF  GFNBMF 

    CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF

  11. ʮૣ͘ʯͳΔݪཧ &YBNQMF6TFDBTF  
 ೚ҙͷϢʔβʔΛJEOBNFͰݕࡧ͍ͨ͠ &YBNQMF6TFDBTF  
 ೥ྸ͕/ࡀະຬͷϢʔβʔΛநग़͍ͨ͠ JE

    OBNF BHF TFY  BMJDF  GFNBMF  CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF

  12. ʮૣ͘ʯͳΔݪཧ  ϑΝΠϧ಺ͷ୯७૸ࠪ ɾ݅ಡΈࠐΜͰɺݕࡧ৚݅ͱর߹
 ɾϨίʔυͷ݅਺෼͚ͩ܁Γฦ͢ JE OBNF BHF TFY 

    BMJDF  GFNBMF  CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF

  13. ʮૣ͘ʯͳΔݪཧ  ϑΝΠϧ಺ͷ୯७૸ࠪ ɾ݅ಡΈࠐΜͰɺݕࡧ৚݅ͱর߹
 ɾϨίʔυͷ݅਺෼͚ͩ܁Γฦ͢ JE OBNF BHF TFY 

    BMJDF  GFNBMF  CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF

  14. ʮૣ͘ʯͳΔݪཧ  ϑΝΠϧ಺ͷ୯७૸ࠪ ɾ݅ಡΈࠐΜͰɺݕࡧ৚݅ͱর߹
 ɾϨίʔυͷ݅਺෼͚ͩ܁Γฦ͢ JE OBNF BHF TFY 

    BMJDF  GFNBMF  CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF

  15. ʮૣ͘ʯͳΔݪཧ  ϑΝΠϧ಺ͷ୯७૸ࠪ ɾ݅ಡΈࠐΜͰɺݕࡧ৚݅ͱর߹
 ɾϨίʔυͷ݅਺෼͚ͩ܁Γฦ͢ JE OBNF BHF TFY 

    BMJDF  GFNBMF  CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF

  16. ʮૣ͘ʯͳΔݪཧ  ϑΝΠϧ಺ͷ୯७૸ࠪ ɾ݅ಡΈࠐΜͰɺݕࡧ৚݅ͱর߹
 ɾϨίʔυͷ݅਺෼͚ͩ܁Γฦ͢ JE OBNF BHF TFY 

    BMJDF  GFNBMF  CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF

  17. ʮૣ͘ʯͳΔݪཧ  ϑΝΠϧ಺ͷ୯७૸ࠪ ɾ݅ಡΈࠐΜͰɺݕࡧ৚݅ͱর߹
 ɾϨίʔυͷ݅਺෼͚ͩ܁Γฦ͢ JE OBNF BHF TFY 

    BMJDF  GFNBMF  CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF ܭࢉίετ ɾݕࡧɿϨίʔυ਺/ʹൺྫ͢Δ
 ɾσʔλ௥ՃɿϑΝΠϧͷ຤ඌʹ෇͚଍͢

  18. ʮૣ͘ʯͳΔݪཧ  ࡧҾͷಇ͖Λ͢Δϝλσʔλͷಋೖ ɾݕࡧଐੑͰιʔτࡁΈͷσʔλߏ଄
 ɾ࣮σʔλʹର͢ΔϙΠϯλʢϑΝΠϧ಺ʹ͓͚Δ ϨίʔυͷόΠτҐஔͷσʔλΛ࣋ͭʣ
 ɾϝλσʔλ಺Λ্Լ͔ΒڬΈܸͪͯ͠ݕࡧ
 ɹɾڬΈܸͪͷൣғ಺ʹͳͬͨྻͷCZUFP⒎TFU
 ɹɹΛࢀর࣮ͯ͠σʔλΛݟʹߦ͘ JE

    OBNF BHF TFY  BMJDF  GFNBMF  CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF BHF CZUFP⒎TFU  P⒎TFUPG JE   ʜ    ʜ  ʜ

  19. ʮૣ͘ʯͳΔݪཧ  ࡧҾͷಇ͖Λ͢Δϝλσʔλͷಋೖ ɾݕࡧଐੑͰιʔτࡁΈͷσʔλߏ଄
 ɾ࣮σʔλʹର͢ΔϙΠϯλʢϑΝΠϧ಺ʹ͓͚Δ ϨίʔυͷόΠτҐஔͷσʔλΛ࣋ͭʣ
 ɾϝλσʔλ಺Λ্Լ͔ΒڬΈܸͪͯ͠ݕࡧ
 ɹɾڬΈܸͪͷൣғ಺ʹͳͬͨྻͷCZUFP⒎TFU
 ɹɹΛࢀর࣮ͯ͠σʔλΛݟʹߦ͘ JE

    OBNF BHF TFY  BMJDF  GFNBMF  CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF BHF CZUFP⒎TFU  P⒎TFUPG JE   ʜ    ʜ  ʜ

  20. ʮૣ͘ʯͳΔݪཧ JE OBNF BHF TFY  BMJDF  GFNBMF 

    CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF ܭࢉίετ ɾݕࡧ
 ɹɾϨίʔυ݅਺/ʹൺྫʢϑϧεΩϟϯΑΓ͸Ϛγʣ
 ɹɾϚον͢ΔϨίʔυ͕ଟ͍৔߹͸ɾɾɾʁ
 ɾσʔλ௥Ճɿ
 ɹɾ࣮σʔλͷϑΝΠϧ͸຤ඌ௥ه
 ɹɾϝλσʔλͷ௥هίετ͸ɾɾɾʁ BHF CZUFP⒎TFU  P⒎TFUPG JE   ʜ    ʜ  ʜ

  21. ʮૣ͘ʯͳΔݪཧ BHF CZUFP⒎TFU  P⒎TFUPG JE   ʜ 

            ʜ      ʜ  P⒎TFUYYY          BHFͷσʔλ͕௥Ճ

  22. ʮૣ͘ʯͳΔݪཧ BHF CZUFP⒎TFU  P⒎TFUPG JE   ʜ 

            ʜ      ʜ  P⒎TFUYYY          BHFͱͳΔߦΛ୳͢  BHFͷσʔλ͕௥Ճ

  23. ʮૣ͘ʯͳΔݪཧ BHF CZUFP⒎TFU  P⒎TFUPG JE   ʜ 

            ʜ      ʜ  P⒎TFUYYY          BHFͱͳΔߦΛ୳͢  BHFͷσʔλ͕௥Ճ  σʔλΛૠೖ

  24. ʮૣ͘ʯͳΔݪཧ BHF CZUFP⒎TFU  P⒎TFUPG JE   ʜ 

            ʜ      ʜ  P⒎TFUYYY          BHFͱͳΔߦΛ୳͢  BHFͷσʔλ͕௥Ճ  σʔλΛૠೖ

  25. ʮૣ͘ʯͳΔݪཧ BHF CZUFP⒎TFU  P⒎TFUPG JE   ʜ 

            ʜ      ʜ  P⒎TFUYYY          BHFͱͳΔߦΛ୳͢  BHFͷσʔλ͕௥Ճ  σʔλΛૠೖ ॱ൪ʹʮ୳͠ʯͨΒޮ཰ѱ͘ͳ͍ʁ ݕࡧʗߋ৽ͷͲͪΒʹ΋Өڹ͕ग़Δ

  26. ʮૣ͘ʯͳΔݪཧ BHF CZUFP⒎TFU  P⒎TFUPG JE   ʜ 

            ʜ      ʜ  P⒎TFUYYY         ͍͔ͭ͘ͷϨϯδʹ෼ׂ͢Δ͜ͱͰݕࡧΛޮ཰Խ͢Δ ɾݕࡧ஋͕ʮͲͷϨϯδʹॴଐ͢Δ͔ʯΛௐ΂Δ
 ɹɾॴଐ͍ͯ͠ͳ͍Ϩϯδͷ૸ࠪΛলུͰ͖Δ
 ɹɾϨίʔυ਺ΑΓɺϨϯδͷݸ਺ͷํ͕͸Δ͔ʹখ͍͞ 
 FYBNQMF
 ԯ݅ͷϨίʔυΛԯͣͭݸͷϨϯδʹ෼ׂɻ
 ୯Ұͷ஋ͰҰகʢ͋Δ͍͸ൣғʣݕࡧ͢Δ৔߹
 ˠݸͷϨϯδΛௐ΂Δॲཧ ԯϨίʔυΛௐ΂Δ Ϩϯδ Ϩϯδ Ϩϯδ

  27. ʮૣ͘ʯͳΔݪཧ ͍͔ͭ͘ͷϨϯδʹ෼ׂ͢Δ͜ͱͰݕࡧΛޮ཰Խ͢Δ ɾݕࡧ஋͕ʮͲͷϨϯδʹॴଐ͢Δ͔ʯΛௐ΂Δ
 ɹɾॴଐ͍ͯ͠ͳ͍Ϩϯδͷ૸ࠪΛলུͰ͖Δ
 ɹɾϨίʔυ਺ΑΓɺϨϯδͷݸ਺ͷํ͕͸Δ͔ʹখ͍͞ 
 FYBNQMF
 ԯ݅ͷϨίʔυΛԯͣͭݸͷϨϯδʹ෼ׂɻ
 ୯Ұͷ஋ͰҰகʢ͋Δ͍͸ൣғʣݕࡧ͢Δ৔߹
 ˠݸͷϨϯδΛௐ΂Δॲཧ

    ԯϨίʔυΛௐ΂Δ Ϩϯδ Ϩϯδ Ϩϯδ ஋ ஋ ɾ ɾ ɾ ɾ ɾ ɾ Ϩϯδ ɾ ɾ ɾ ɾ ɾ ɾ

  28. ʮૣ͘ʯͳΔݪཧ ͍͔ͭ͘ͷϨϯδʹ෼ׂ͢Δ͜ͱͰݕࡧΛޮ཰Խ͢Δ ɾݕࡧ஋͕ʮͲͷϨϯδʹॴଐ͢Δ͔ʯΛௐ΂Δ
 ɹɾॴଐ͍ͯ͠ͳ͍Ϩϯδͷ૸ࠪΛলུͰ͖Δ
 ɹɾϨίʔυ਺ΑΓɺϨϯδͷݸ਺ͷํ͕͸Δ͔ʹখ͍͞ 
 FYBNQMF
 ԯ݅ͷϨίʔυΛԯͣͭݸͷϨϯδʹ෼ׂɻ
 ୯Ұͷ஋ͰҰகʢ͋Δ͍͸ൣғʣݕࡧ͢Δ৔߹
 ˠݸͷϨϯδΛௐ΂Δॲཧ

    ԯϨίʔυΛௐ΂Δ Ϩϯδ Ϩϯδ Ϩϯδ ɾ ɾ ɾ ɾ ɾ ɾ Ϩϯδ Ϩϯδ Ϩϯδ ɾ ɾ ɾ ɾ ɾ ɾ

  29. ʮૣ͘ʯͳΔݪཧ ͍͔ͭ͘ͷϨϯδʹ෼ׂ͢Δ͜ͱͰݕࡧΛޮ཰Խ͢Δ ɾݕࡧ஋͕ʮͲͷϨϯδʹॴଐ͢Δ͔ʯΛௐ΂Δ
 ɹɾॴଐ͍ͯ͠ͳ͍Ϩϯδͷ૸ࠪΛলུͰ͖Δ
 ɹɾϨίʔυ਺ΑΓɺϨϯδͷݸ਺ͷํ͕͸Δ͔ʹখ͍͞ 
 FYBNQMF
 ԯ݅ͷϨίʔυΛԯͣͭݸͷϨϯδʹ෼ׂɻ
 ୯Ұͷ஋ͰҰகʢ͋Δ͍͸ൣғʣݕࡧ͢Δ৔߹
 ˠݸͷϨϯδΛௐ΂Δॲཧ

    ԯϨίʔυΛௐ΂Δ Ϩϯδ Ϩϯδ Ϩϯδ ɾ ɾ ɾ ɾ ɾ ɾ Ϩϯδ Ϩϯδ Ϩϯδ ਌Ϩϯδ ɾ ɾ ɾ ɾ ɾ ɾ

  30. ʮૣ͘ʯͳΔݪཧ ͍͔ͭ͘ͷϨϯδʹ෼ׂ͢Δ͜ͱͰݕࡧΛޮ཰Խ͢Δ ɾݕࡧ஋͕ʮͲͷϨϯδʹॴଐ͢Δ͔ʯΛௐ΂Δ
 ɹɾॴଐ͍ͯ͠ͳ͍Ϩϯδͷ૸ࠪΛলུͰ͖Δ
 ɹɾϨίʔυ਺ΑΓɺϨϯδͷݸ਺ͷํ͕͸Δ͔ʹখ͍͞ 
 FYBNQMF
 ԯ݅ͷϨίʔυΛԯͣͭݸͷϨϯδʹ෼ׂɻ
 ୯Ұͷ஋ͰҰகʢ͋Δ͍͸ൣғʣݕࡧ͢Δ৔߹
 ˠݸͷϨϯδΛௐ΂Δॲཧ

    ԯϨίʔυΛௐ΂Δ Ϩϯδ Ϩϯδ Ϩϯδ ɾ ɾ ɾ ɾ ɾ ɾ Ϩϯδ Ϩϯδ Ϩϯδ ਌Ϩϯδ Ϩϯδ෼ׂͯ͠ɺଟ਺ͷ஋͔Β ޮ཰Α͘ݕࡧͰ͖Δ໦ߏ଄ ˠ#5SFF ɾ ɾ ɾ ɾ ɾ ɾ

  31. খٳࢭ w ϑϧεΩϟϯͰݕࡧ͢ΔͱɺϨίʔυ਺ʹൺྫ͢Δݕࡧίετ͕͔͔Δʢγʔέ ϯγϟϧΞΫηεʣ w ݕࡧ༻ͷʮϝλσʔλʯΛಋೖ͠ɺ࣮σʔλͷݕࡧޮ཰Λ޲্͢Δ w ݕࡧଐੑͰιʔτࡁΈͰɺରԠ͢Δ࣮σʔλ΁ͷϙΠϯλΛ࣋ͭσʔλߏ଄ w ϥϯμϜΞΫηεΛޮ͔ͤΔ͜ͱͰݕࡧޮ཰Λվળ͢Δ

    w ϝλσʔλʢΠϯσοΫεʣࣗ਎ͷݕࡧ΋ޮ཰Խ͢Δඞཁ͕͋Δ w Ϩϯδ෼ׂͯ͠ɺ໦ߏ଄ͷσʔλͱͯ͠ѻ͏ͱݕࡧޮ཰͕ྑ͍ˠ#5SFF

  32. ʮૣ͘ʯͳΔݪཧʢ࠶ʣ JE OBNF BHF TFY  BMJDF  GFNBMF 

    CPC  GFNBMF  DIBSMJF  NBMF                  [PF  GFNBMF ܭࢉίετ ɾݕࡧ
 ɹɾϨίʔυ݅਺/ʹൺྫʢϑϧεΩϟϯΑΓ͸Ϛγʣ
 ɹɾϚον͢ΔϨίʔυ͕ଟ͍৔߹͸ɾɾɾʁ
 ɾσʔλ௥Ճɿ
 ɹɾ࣮σʔλͷϑΝΠϧ͸຤ඌ௥ه
 ɹɾϝλσʔλͷํ͸ɾɾɾʁ BHF CZUFP⒎TFU  P⒎TFUPG JE   ʜ    ʜ  ʜ

  33. ΠϯσοΫεΞΫηε JE OBNF BHF TFY  BMJDF  GFNBMF 

    CPC  GFNBMF  DIBSMJF  NBMF                                                  [PF  GFNBMF BHF CZUFP⒎TFU  P⒎TFUPG JE             P⒎TFUPG JE                          2VFSZ lBHFz ΠϯσοΫεϑΝΠϧ σʔλϑΝΠϧ ʢ࣮σʔλʣ

  34. ΠϯσοΫεΞΫηε JE OBNF BHF TFY  BMJDF  GFNBMF 

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  35. ΠϯσοΫεΞΫηε JE OBNF BHF TFY  BMJDF  GFNBMF 

    CPC  GFNBMF  DIBSMJF  NBMF                                                  [PF  GFNBMF BHF CZUFP⒎TFU  P⒎TFUPG JE             P⒎TFUPG JE                          2VFSZ lBHFz  #USFFJOEFYΛݕࡧ  ΠϯσοΫε͕ࢦ͢ΦϑηοτͰ ࣮σʔλͷσʔλϑΝΠϧΛࢀর

  36. ΠϯσοΫεΞΫηεϚον͢Δ݁Ռ͕ଟ͍৔߹ JE OBNF BHF TFY  BMJDF  GFNBMF 

    CPC  GFNBMF  DIBSMJF  NBMF                                                  [PF  GFNBMF BHF CZUFP⒎TFU  P⒎TFUPG JE             P⒎TFUPG JE                          2VFSZ lBHFz

  37. ΠϯσοΫεΞΫηεϚον͢Δ݁Ռ͕ଟ͍৔߹ JE OBNF BHF TFY  BMJDF  GFNBMF 

    CPC  GFNBMF  DIBSMJF  NBMF                                                  [PF  GFNBMF BHF CZUFP⒎TFU  P⒎TFUPG JE             P⒎TFUPG JE                          2VFSZ lBHFz  #USFFJOEFYΛݕࡧ

  38. ΠϯσοΫεΞΫηεϚον͢Δ݁Ռ͕ଟ͍৔߹ JE OBNF BHF TFY  BMJDF  GFNBMF 

    CPC  GFNBMF  DIBSMJF  NBMF                                                  [PF  GFNBMF BHF CZUFP⒎TFU  P⒎TFUPG JE             P⒎TFUPG JE                          2VFSZ lBHFz  #USFFJOEFYΛݕࡧ ɾ ɾ ɾ  ΠϯσοΫε͕ࢦ͢ΦϑηοτͰ ࣮σʔλͷσʔλϑΝΠϧΛࢀর ʢϚονͨ͠ճ਺͚ͩϥϯμϜΞΫηεʣ

  39. ΠϯσοΫεΞΫηεϚον͢Δ݁Ռ͕ଟ͍৔߹ JE OBNF BHF TFY  BMJDF  GFNBMF 

    CPC  GFNBMF  DIBSMJF  NBMF                                                  [PF  GFNBMF BHF CZUFP⒎TFU  P⒎TFUPG JE             P⒎TFUPG JE                          2VFSZ lBHFz  #USFFJOEFYΛݕࡧ ɾ ɾ ɾ  ΠϯσοΫε͕ࢦ͢ΦϑηοτͰ ࣮σʔλͷσʔλϑΝΠϧΛࢀর ʢϚονͨ͠ճ਺͚ͩϥϯμϜΞΫηεʣ ɹϑϧεΩϟϯΑΓޮ཰ѱ͘ͳ͍ʁ🤔🤔 ɹ

  40. ΠϯσοΫεΞΫηεϚον͢Δ݁Ռ͕ଟ͍৔߹ JE OBNF BHF TFY  BMJDF  GFNBMF 

    CPC  GFNBMF  DIBSMJF  NBMF                                                  [PF  GFNBMF BHF CZUFP⒎TFU  P⒎TFUPG JE             P⒎TFUPG JE                          2VFSZ lBHFz  #USFFJOEFYΛݕࡧ ɾ ɾ ɾ  ΠϯσοΫε͕ࢦ͢ΦϑηοτͰ ࣮σʔλͷσʔλϑΝΠϧΛࢀর ʢϚονͨ͠ճ਺͚ͩϥϯμϜΞΫηεʣ ɹϑϧεΩϟϯΑΓޮ཰ѱ͘ͳ͍ʁ🤔🤔 ɹΠϯσοΫεܦ༝Ͱݟʹߦ͘෼͚ͩɺΉ͠Ζखؒ૿͑ͯΔ

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  43. 1PTUHSF42-ͷΠϯσοΫεͱ
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