inotify の話 / About inotify

inotify の話 。弊社サービスでどのように使ったかというお話。

Transcript

1. JOPUJGZ
   ͷ࿩ 
   ୈճ
   3VCZؔ੢
   ษڧձ
   Ӭాɹஹ !LJ[BTIJ
   
2. ࣗݾ঺հ w Ӭాɹஹʢ!LJ[BTIJʣ
   w גࣜձࣾΠϯήʔδ
   $50
   w ʮ3FMBUJPOʯͱ͍͏##޲͚Ϋϥ΢υαʔϏεΛ։ൃ
   w ʮ3FMBUJPOʯʹ͍ͭͯ͸ޙड़
   
3. ʮ3FMBUJPOʯͱ͸ w ʮड৴ശΛνʔϜͰڞ༗͢ΔͨΊͷαʔϏεʯ
   w ར༻γʔϯɿTVQQPSU!FYBNQMFDPN
   ΍
   JOGP!FYBNQMFDPN
   ͳͲͷ୅දΞυϨεΛෳ਺ਓͰରԠɾ ؅ཧ͢Δ
   w (NBJM
   ͳͲͷݸਓ޲͚8FCϝʔϧαʔϏεͱҧͬͯɺνʔ ϜͰڞ༗͢ΔͨΊʹඞཁͳػೳɺศརͳػೳ͕౥ࡌ͞Ε ͍ͯΔ
   w ϝʔϧҎ֎ʹ΋5XJUUFS΍-*/&ʹ΋ରԠ
   
4. 
   
5. 3FMBUJPO
   Ͱ
   
   JOPUJGZ
   Λ࢖ͬͨ࿩Λ͠·͢ !5
6. JOPUJGZ
   ͱ͸ w ϑΝΠϧγεςϜͷΠϕϯτ؂ࢹͷ࢓૊Έ
   w ϑΝΠϧ΍σΟϨΫτϦͷΦʔϓϯɺΫϩʔζɺҠಈ ໊લมߋɺ࡟আɺ࡞੒ɺଐੑͷมߋ
   w -JOVY
   Χʔωϧ
   
   ೥ Ͱ૊Έࠐ·Εͨ
   w .BD
   
   8JOEPXT
   Ͱ͸
   JOPUJGZ
   ͸࢖͑ͳ͍
   w ͦΕͧΕ04͝ͱʹಛ༗ͷ࢓૊Έ͕͋Δ
   
7. JOPUJGZ
   ͷ༻్ w σΟϨΫτϦϏϡʔͷࣗಈߋ৽
   w ΢ΟϧεϑΝΠϧͷϦΞϧλΠϜݕ஌
   w ઃఆϑΝΠϧͷ࠶ಡΈࠐΈ
   w ϗοτϦϩʔυ
   
8. ͦΕͬͯ
   (VBSE
   ͬΆ͘ͳ͍ʁ !8
9. (VBSE
   ͱ͸ w (VBSE
   HFN
   ͱ͸
   w ϑΝΠϧͷมߋΛݕ஌ͯ͠೚ҙͷλεΫΛ࣮ߦ͢Δ࢓૊ ΈΛఏڙ
   w (VBSEpMF
   Ͱهड़
   w ಺෦తʹ
   JOPUJGZ
   ͕࢖ΘΕ͍ͯΔ
   w λεΫΛಛԽͤͨ͞ϓϥάΠϯ΋͋Δ
   
10. (VBSE
    QMVHJOT w HVBSEMJWFSFMPBE
    w ϑΝΠϧͷมߋΛݕ஌ͯ͠ϒϥ΢βΛϦϩʔυ
    w HVBSESTQFD
    w ϑΝΠϧͷมߋΛݕ஌ͯ͠ɺࣗಈͰ
    STQFD
    ىಈ
    w HVBSESVCPDPQ
    w ϑΝΠϧͷมߋΛݕ஌ͯ͠ɺࣗಈͰ
    SVCPDPQ
    ىಈ
    
11. (VBSE
    ʹ04ґଘ͸ͳ͍ʁ
    Ͳ͏΍͍ͬͯΔͷ͔ʁ !11
12. 04
    ผͷ࢓૊ΈΛٵऩ͢ΔHFN͕͋Δ
     MJTUFO HVBSE SCJOPUJGZ SCGTFWFOU XEN IUUQTHJUIVCDPNHVBSEMJTUFOUSFFNBTUFSMJCMJTUFOBEBQUFS (VBSE
    ͷϓϩδΣΫτ
13. !13 3FMBUJPO
    Ͱ
    JOPUJGZ
    ΛͲ͏࢖͔ͬͨ
14. લఏͷڞ༗ w 3FMBUJPO
    Ͱ͸Πϯό΢ϯυϝʔϧʢϝʔϧసૹʣΛड͚ औΔ࢓૊Έ͕͋Δ
    w ϙʔτΛ։͚ͯɺ1PTUpY
    ͕ड͚औ͍ͬͯΔ
    w ड৴ͨ͠ϝʔϧ͸ϓϩάϥϜΛܦ༝ͯ͠σʔλϕʔεʹ֨ ೲ͞ΕΔ
    
15. ैདྷͷ΍Γํ w 1PTUpY
    Ͱ͸ड৴ͨ͠ϝʔϧΛϓϩάϥϜʹΘͨ͢࢓૊Έ ͕͋Δʢϝʔϧͷຊମ͕ඪ४ೖྗͱͯ͠Θͨ͞ΕΔʣ
    w ௨ड৴͢ΔͨͼʹϓϩάϥϜ͕ىಈ͢Δ
    
16. ैདྷͷ΍Γํͷ໰୊ w ϝʔϧड৴͢ΔͨͼʹɺҎԼͷॲཧ͕૸Δ
    w ઃఆϑΝΠϧಡΈࠐΈɺσʔλϕʔε઀ଓɺϝʔϧύʔεɺ ϝʔϧอଘɺσʔλϕʔε੾அ
    w ௨͋ͨΓͷॲཧʹ͕͔͔࣌ؒΔ
    w σʔλϕʔε઀ଓɾ੾அͳͲίετ͕େ͖͍
    w ϓϩηεͷىಈίετ΋େ͖͍
17. JOPUJGZ
    Λ࢖ͬͨ΍Γํʹมߋ w ड৴ϑΥϧμΛ؂ࢹ͢ΔৗறϓϩάϥϜʹมߋ͠ɺϑΝΠ ϧ࡞੒ΠϕϯτΛड͚औͬͯϝʔϧͷύʔεɾ%#֨ೲ͢ ΔΑ͏ʹͨ͠
     d.BJMEJSOFX ৗற ؂ࢹ Πϕϯτ JOPUJGZ σʔλϕʔε΁ͷ઀ଓίετɺϓϩηεͷىಈίετ΋ͳ͘ͳΓɺ
    αʔόʔ୆਺࡟ݮɺεϖοΫॖখ͕Մೳͱͳͬͨʂ
18. !18 σϞ
19. !19 require 'rb-inotify' notifier = INotify::Notifier.new notifier.watch("./watch", :modify, :create, :delete) do |event| puts "#{event.flags.to_s}: #{event.absolute_name} " end notifier.run require 'listen' puts `uname -s` listener = Listen.to('./watch') do |modified, added, removed| puts "modified: #{modified}" puts "added: #{added}" puts "removed: #{removed}" puts "-" * 50 end listener.start sleep -JOVYͷΈಈ࡞ 04ґଘͳ͠
20. !20 ͓·͚
21. !21 #!/usr/bin/env perl use strict; use warnings; use feature 'say'; use Linux::Inotify2; my $watch_dir = './watch'; my $inotify = Linux::Inotify2->new or die $!; $inotify->watch( $watch_dir, IN_CREATE | IN_MODIFY | IN_DELETE, sub { my $e = shift; my $fullpath = $e->fullname; say "modified: $fullpath" if $e->IN_MODIFY; say "created: $fullpath" if $e->IN_CREATE; say "deleted: $fullpath" if $e->IN_DELETE; } ); $inotify->poll while 1; ࣮͸1FSMͰ
    ΍ͬͯ·ͨ͠
22. ΠϯήʔδͰ͸
    ΤϯδχΞΛืू͍ͯ͠·͢
    !22