mogilefsd

   1 #!/usr/bin/perl
   2 #
   3 # MogileFS daemon
   4 #
   5 # Copyright 2004, Danga Interactive
   6 # Copyright 2005-2006, Six Apart Ltd.
   7 #
   8 # See POD at bottom.
   9
  10 use strict;
  11 use warnings;
  12 use lib 'lib';
  13 use MogileFS::Server;
  14
  15 # Rename binary in process list to make init scripts saner
  16 $0 = "mogilefsd";
  17
  18 my $s = MogileFS::Server->server;
  19 $s->run;
  20
  21 1;
  22
  23 # Local Variables:
  24 # mode: perl
  25 # c-basic-indent: 4
  26 # indent-tabs-mode: nil
  27 # End:
  28
  29 __END__
  30
  31 =head1 NAME
  32
  33 mogilefsd -- MogileFS tracker daemon
  34
  35 =head1 USAGE
  36
  37 This is the main MogileFS daemon, mogilefsd, also called the
  38 "tracker".  All interaction with a MogileFS installation begins by a
  39 client talking to a tracker (you should run several in parallel for
  40 redundancy).
  41
  42 See L<MogileFS::Client> for a client library.
  43
  44 =head1 ARCHITECTURE
  45
  46 =head2 Processes
  47
  48 The mogilefsd daemon is an event-loop in the parent process, handling
  49 with epoll/kqueue/etc (see L<Danga::Socket>) tons of client
  50 connections, while managing a bunch of worker processes underneath.
  51
  52 The worker processes under mogilefsd include:
  53
  54 =over 4
  55
  56 =item B<Client query processing> -- implements the MogileFS client/server protocol
  57
  58 See L<MogileFS::Worker::Query>.
  59
  60 =item B<Monitoring> -- monitors hosts and devices
  61
  62 See L<MogileFS::Worker::Monitor>.
  63
  64 =item B<Replicate> -- replicates files
  65
  66 See L<MogileFS::Worker::Replicate>.
  67
  68 =item B<Deleter> -- deletes files from storage nodes (protocol deletes from namespace are immediate)
  69
  70 See L<MogileFS::Worker::Delete>.
  71
  72 =item B<Reaper> -- re-enqueues files for replication when disks are marked dead
  73
  74 See L<MogileFS::Worker::Reaper>.
  75
  76 =item B<Fsck> -- background filesystem consistency checker
  77
  78 See L<MogileFS::Worker::Fsck>.
  79
  80 =back
  81
  82 =head2 Data Storage
  83
  84 See L<MogileFS::Store>.
  85
  86 =head1 AUTHORS
  87
  88 Brad Fitzpatrick E<lt>brad@danga.comE<gt>
  89
  90 Mark Smith E<lt>junior@danga.comE<gt>
  91
  92 Brad Whitaker E<lt>whitaker@danga.comE<gt>
  93
  94 =head1 COPYRIGHT
  95
  96  Copyright 2004, Danga Interactive
  97  Copyright 2005-2006, Six Apart Ltd.
  98
  99 =head1 LICENSE
 100
 101 Same terms as Perl itself.  Artistic/GPLv2, at your choosing.
 102
 103 =head1 SEE ALSO
 104
 105 L<mogstored> -- MogileFS storage daemon
 106
 107 L<http://danga.com/mogilefs/>