Swarm: The distributed storage platform

by Keisuke Mori

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Swarm The distributed storage platform Hi-Ether Meetup Fukuoka #7

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͸͡Ίʹ

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৿ܒี!LNPSSSSZ ۙـେֶ࢈ۀཧ޻ֶ෦# $JSDVMBUJPO5FDIOPMPHZ-BC 4NBSU$POUSBDU 4FSWFSTJEF3BJMT (P 1)1

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࿑ಇ໰୊ͷղܾΛ໨ࢦͯ͠ɺऔΓ૊ΜͰ͍͖·͢

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ͯ͞ɺ෼ࢄετϨʔδͷ࿩Λ

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෼ࢄετϨʔδ΍Γ͍ͨͰ͢ΑͶʁ

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11Ͱ઀ଓ͞Εͨϊʔυ্ͰϑΝΠϧΛڞ༗ 11ωοτϫʔΫʹΞοϓϩʔυ͞ΕͨϑΝΠϧΛஅยԽ͠ɺ֤ϊʔυʹ ෼ࢄͯ͠഑ஔ͢Δ͜ͱͰ଱ো֐ੑΛߴΊΔˠ୯Ұো֐఺ͷ໰୊͕ͳ͍ ωοτϫʔΫ্ͷϊʔυ͕Մಈ͠ଓ͚ΔݶΓɺϑΝΠϧγεςϜΛఏڙ͠ ଓ͚Δ͜ͱ͕Ͱ͖Δ -FHBDZɿ8JOOZ #JU5PSSFOU .PEFSOɿ*1'4 4XBSN 4UPSK 4JB 'JMFDPJOʜ ෼ࢄϑΝΠϧγεςϜ

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*OUFS1MBOFUBSZ'JMF4ZTUFN 11ωοτϫʔΫ্Ͱಈ࡞͢ΔϋΠύʔϝσΟΞϓϩτίϧ ίϯςϯπࢦ޲ ɹʔ888ͷΑ͏ͳϩέʔγϣϯࢦ޲Ͱ͸ͳ͍ ɹɹ&YFYBNQMFDPNIPHFGVHBIUNM ɹʔ৔ॴͰ͸ͳ͘ɺίϯςϯπͷ಺༰Λࢦఆͯ͠ΞΫηε͢Δ ɹɹίϯςϯπͷϋογϡ஋Λίϯςϯπ*%ͱͯ͠ར༻ ɹɹίϯςϯπͷϋογϡ஋Λࢦఆ͠ɺͦͷίϯςϯπ͕͋Δʮ৔ॴʯ͸ࢦఆ͠ͳ͍ ɹɹෛՙ෼ࢄɺ଱ো֐ੑɺ଱ݕӾੑɺ଱վળੑ *1'4

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4XBSN

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&UIFSFVNͷϓϩτίϧΛ࢖ͬͨ෼ࢄετϨʔδϓϥοτϑΥʔϜ 1SPPGPG$PODFQUWFS͕։ൃத 4XBSN

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ɾ&UIFSFVNXFCTUBDLͷͭ ɾίϯςϯπࢦ޲ ɾಛఆͷαʔόʔͰϗετ͞Εͳ͍ ɾେ͖ͳσʔλ͸$IVOLͱͯ͠෼ׂͯ͠อଘ ɾθϩఀࢭ࣌ؒɺෛՙ෼ࢄɺ଱ো֐ੑɺ଱ݕӾੑɺ଱վળੑ ɾ&/4ʹΑΔυϝΠϯղܾ ɾӬٱʹόʔδϣϯ؅ཧ͞Εͨίϯςϯπ 4XBSN֓ཁ

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޿͘ଊ͑Δͱ΄΅ಉ͡΋ͷͱଊ͑ͯྑ͍͕ɺͱ͜ΖͲ͜Ζҧ͏ ͲͪΒ΋։ൃ్தʢ1P$ʣ *1'4ͱ4XBSN *1'4 4XBSN 11ϥΠϒϥϦ MJCQQ EFWQQ ໊લղܾ *1/4 &/4 ϒϥ΢δϯά HBUFXBZJQGTJPYYY MPDBMIPTUC[[YYY ΠϯηϯςΟϒ ʔ 1P$Ͱ௥Ճ༧ఆ *1'4ͱ4XBSNͷओͳ૬ҧ఺

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4XBSNͷετϨʔδ୯ҐͰ͋ΔɺαΠζ͕ݶఆ͞Εͨσʔλɻ  ωοτϫʔΫ૚͸DIVOLΛೝࣝ͠ɺϑΝΠϧ΍ίϨΫγϣϯͷ֓೦ Λ࣋ͨͳ͍ɻDIVOL͸,#ɻ ߏ଄ DIVOL SFGFSFODF ίϯςϯπʹ෇༩͞ΕΔҰҙͷࣝผࢠɻ  ඇ҉߸ԽɿIFYCZUFͰγϦΞϥΠζ͞ΕͨCZUFͷϋογϡ  ҉߸ԽɹɿίϯςϯπΞυϨε CZUF ʴ෮߸Խݤ CZUF NBOJGFTU ϑΝΠϧίϨΫγϣϯΛهड़͢Δσʔλߏ଄ɻ σΟϨΫτϦ͝ͱΞοϓϩʔυ͢Δ࣌ʢ&Y8FCϖʔδʣʹɺ  ϑΝΠϧ΁ͷϚοϐϯάΛఆ͍ٛͯ͠Δ

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ಉҰσΟϨΫτϦ಺ͷ'JMFUYU 'JMFUYU 'JMFUYUΛΞοϓϩʔυ ϑΝΠϧΞΫηεʢC[[ʣ MPDBMIPTUC[[IBTIYYYYYYYYYY'JMFUYU MPDBMIPTUC[[FYBNQMFFUI'JMFUYU σΟϨΫτϦͷϑΝΠϧҰཡʢC[[MJTUʣ MPDBMIPTUC[[MJTUIBTIYYYYYYYɹ .BOJGFTUϑΝΠϧΛऔಘʢC[[SBXʣ MPDBMIPTUC[[SBXIBTIYYYYYYYɹ ϑΝΠϧΞΫηε

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4XBSN"DDPVOUJOH1SPUPDPM શൠతͳΠϯηϯςΟϒ؅ཧ 4XBSNͷΠϯηϯςΟϒγεςϜͷίΞͱͳΔ ΠϯηϯςΟϒγεςϜʢ1P$ʣ 48"1 48&"3 4FDVSF8BZTPG&OTVSJOH"3DIJWBM $IVOL͕ͪΌΜͱอ࣋͞Ε͍ͯΔ͔Ͳ͏͔౳ɺ$IVOLͷ඼࣭Λ୲อ 48&"3ʹอূۚΛΤεΫϩʔͯ͠ΠϯηϯςΟϒΛड͚Δ 48*/%-& 4FDVSFE8JUI*/TVSBODF%FQPTJU-JUJHBUJPOBOE&TDSPX 48&"3Ͱక݁͞ΕͨίϯτϥΫτΛ؂ࢹ͠ɺΤεΫϩʔͨ͠อূۚ Λ؅ཧ͠ɺҧ൓ऀʹ͸േଇΛ༩͑Δ

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ࢀর࣮૷͸7FSTJPOY ͱΓ͋͑ͣ͞ΘͬͯΈΔ go get github.com/ethereum/go-ethereumgo cd $GOPATH/src/github.com/ethereum/go-ethereum/cmd install ./geth install ./swarm HPFUIFSFVNʹ࣮૷ࡁ geth account new geth --syncmode=light swarm --bzzaccount ૸ΒͤͯΈΔ

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ͱΓ͋͑ͣ͞ΘͬͯΈΔ $ cd /Users/keisuke/go/swarm $ ls > File_1.txt File_2.txt File_3.txt $ swarm --recursive up /Users/keisuke/go/swarm > c930e0ada49614c5465334923b9b8ab9a0d8ebe0d35bfaf0044dbc3ac9178f06 σΟϨΫτϦ͝ͱΞοϓϩʔυ $ swarm ls c930e0ada49614c5465334923b9b8ab9a0d8ebe0d35bfaf0044dbc3ac9178f06 > HASH CONTENT TYPE PATH 4c24fcac7c18851a5dd6a6a12fbdb7e9f7b634751d3a992c4bb15e27fe16ba45 text/plain; charset=utf-8 File_1.txt 4c24fcac7c18851a5dd6a6a12fbdb7e9f7b634751d3a992c4bb15e27fe16ba45 text/plain; charset=utf-8 File_2.txt d9403cc2dd48592d93dde0e5e296328c303206130f28f9822a0c89f35ddfe5e6 text/plain; charset=utf-8 File_3.txt Ξοϓϩʔυ͞Εͨ͜ͱΛ֬ೝ

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144 11ϝοηʔδϯάγεςϜ .VUBCJMJUZ &/4Λ௨ͯ͡ίϯςϯπΛมߋՄೳʹ '64&TVQQPSU 4XBSNσʔλΛϩʔΧϧϑΝΠϧγεςϜʹ౷߹ʢ-JOVY .BDʣ 1P$