diff options
Diffstat (limited to 'lib/PublicInbox/SearchIdxPart.pm')
-rw-r--r-- | lib/PublicInbox/SearchIdxPart.pm | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/lib/PublicInbox/SearchIdxPart.pm b/lib/PublicInbox/SearchIdxPart.pm new file mode 100644 index 00000000..078d2df1 --- /dev/null +++ b/lib/PublicInbox/SearchIdxPart.pm @@ -0,0 +1,106 @@ +# Copyright (C) 2018 all contributors <meta@public-inbox.org> +# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt> +package PublicInbox::SearchIdxPart; +use strict; +use warnings; +use base qw(PublicInbox::SearchIdx); + +sub new { + my ($class, $v2writable, $part) = @_; + my $self = $class->SUPER::new($v2writable->{-inbox}, 1, $part); + # create the DB before forking: + $self->_xdb_acquire; + $self->_xdb_release; + $self->spawn_worker($v2writable, $part) if $v2writable->{parallel}; + $self; +} + +sub spawn_worker { + my ($self, $v2writable, $part) = @_; + my ($r, $w); + pipe($r, $w) or die "pipe failed: $!\n"; + binmode $r, ':raw'; + binmode $w, ':raw'; + my $pid = fork; + defined $pid or die "fork failed: $!\n"; + if ($pid == 0) { + my $bnote = $v2writable->atfork_child; + $v2writable = undef; + close $w or die "failed to close: $!"; + + # F_SETPIPE_SZ = 1031 on Linux; increasing the pipe size here + # speeds V2Writable batch imports across 8 cores by nearly 20% + fcntl($r, 1031, 1048576) if $^O eq 'linux'; + + eval { partition_worker_loop($self, $r, $part, $bnote) }; + die "worker $part died: $@\n" if $@; + die "unexpected MM $self->{mm}" if $self->{mm}; + exit; + } + $self->{pid} = $pid; + $self->{w} = $w; + close $r or die "failed to close: $!"; +} + +sub partition_worker_loop ($$$$) { + my ($self, $r, $part, $bnote) = @_; + $0 = "pi-v2-partition[$part]"; + $self->begin_txn_lazy; + while (my $line = $r->getline) { + if ($line eq "commit\n") { + $self->commit_txn_lazy; + } elsif ($line eq "close\n") { + $self->_xdb_release; + } elsif ($line eq "barrier\n") { + $self->commit_txn_lazy; + # no need to lock < 512 bytes is atomic under POSIX + print $bnote "barrier $part\n" or + die "write failed for barrier $!\n"; + } elsif ($line =~ /\AD ([a-f0-9]{40,}) (.+)\n\z/s) { + my ($oid, $mid) = ($1, $2); + $self->begin_txn_lazy; + $self->remove_by_oid($oid, $mid); + } else { + chomp $line; + my ($len, $artnum, $oid, $mid0) = split(/ /, $line); + $self->begin_txn_lazy; + my $n = read($r, my $msg, $len) or die "read: $!\n"; + $n == $len or die "short read: $n != $len\n"; + my $mime = PublicInbox::MIME->new(\$msg); + $artnum = int($artnum); + $self->add_message($mime, $n, $artnum, $oid, $mid0); + } + } + $self->worker_done; +} + +# called by V2Writable +sub index_raw { + my ($self, $bytes, $msgref, $artnum, $oid, $mid0, $mime) = @_; + if (my $w = $self->{w}) { + print $w "$bytes $artnum $oid $mid0\n", $$msgref or die + "failed to write partition $!\n"; + $w->flush or die "failed to flush: $!\n"; + } else { + $$msgref = undef; + $self->begin_txn_lazy; + $self->add_message($mime, $bytes, $artnum, $oid, $mid0); + } +} + +sub atfork_child { + close $_[0]->{w} or die "failed to close write pipe: $!\n"; +} + +# called by V2Writable: +sub remote_barrier { + my ($self) = @_; + if (my $w = $self->{w}) { + print $w "barrier\n" or die "failed to print: $!"; + $w->flush or die "failed to flush: $!"; + } else { + $self->commit_txn_lazy; + } +} + +1; |