# support testing with dev versions of Xapian which installs
# commands with a version number suffix (e.g. "xapian-compact-1.5")
our $XAPIAN_COMPACT = $ENV{XAPIAN_COMPACT} || 'xapian-compact';
+our @COMPACT_OPT = qw(jobs|j=i quiet|q blocksize|b=s no-full|n fuller|F);
sub commit_changes ($$$) {
my ($ibx, $tmp, $opt) = @_;
-
+ my $new_parts = $opt->{reshard};
my $reindex = $opt->{reindex};
my $im = $ibx->importer(0);
$im->lock_acquire if !$opt->{-coarse_lock};
+ $SIG{INT} or die 'BUG: $SIG{INT} not handled';
+ my @old_part;
+
while (my ($old, $new) = each %$tmp) {
- my @st = stat($old) or die "failed to stat($old): $!\n";
+ my @st = stat($old);
+ if (!@st && !defined($opt->{reshard})) {
+ die "failed to stat($old): $!";
+ }
my $over = "$old/over.sqlite3";
if (-f $over) { # only for v1, v2 over is untouched
+ defined $new or die "BUG: $over exists when culling v2";
$over = PublicInbox::Over->new($over);
my $tmp_over = "$new/over.sqlite3";
$over->connect->sqlite_backup_to_file($tmp_over);
$over = undef;
}
- chmod($st[2] & 07777, $new) or die "chmod $old: $!\n";
+ if (!defined($new)) { # culled partition
+ push @old_part, $old;
+ next;
+ }
+
+ if (@st) {
+ chmod($st[2] & 07777, $new) or die "chmod $old: $!\n";
+ rename($old, "$new/old") or
+ die "rename $old => $new/old: $!\n";
+ }
# Xtmpdir->DESTROY won't remove $new after this:
- rename($old, "$new/old") or die "rename $old => $new/old: $!\n";
rename($new, $old) or die "rename $new => $old: $!\n";
- my $prev = "$old/old";
- remove_tree($prev) or die "failed to remove $prev: $!\n";
+ if (@st) {
+ my $prev = "$old/old";
+ remove_tree($prev) or
+ die "failed to remove $prev: $!\n";
+ }
}
+ remove_tree(@old_part);
$tmp->done;
if (!$opt->{-coarse_lock}) {
$opt->{-skip_lock} = 1;
+
+ if ($im->can('count_partitions')) {
+ my $pr = $opt->{-progress};
+ my $n = $im->count_partitions;
+ if (defined $new_parts && $n != $new_parts) {
+ die
+"BUG: counted $n shards after resharding to $new_parts";
+ }
+ my $prev = $im->{partitions};
+ if ($pr && $prev != $n) {
+ $pr->("shard count changed: $prev => $n\n");
+ $im->{partitions} = $n;
+ }
+ }
+
PublicInbox::Admin::index_inbox($ibx, $opt);
# implicit lock_release
} else {
my ($cb, $args, $opt) = @_; # $cb = cpdb() or compact()
defined(my $pid = fork) or die "fork: $!";
return $pid if $pid > 0;
- eval { $cb->($args, $opt) };
- die $@ if $@;
+ $cb->($args, $opt);
exit 0;
}
}
}
-sub progress_prepare ($) {
- my ($opt) = @_;
- if ($opt->{quiet}) {
- open my $null, '>', '/dev/null' or
- die "failed to open /dev/null: $!\n";
- $opt->{1} = fileno($null);
- $opt->{-dev_null} = $null;
- } else {
- $opt->{-progress} = sub { print STDERR @_ };
- }
-}
-
sub same_fs_or_die ($$) {
my ($x, $y) = @_;
return if ((stat($x))[0] == (stat($y))[0]); # 0 - st_dev
die "$x and $y reside on different filesystems\n";
}
+sub process_queue {
+ my ($queue, $cb, $max, $opt) = @_;
+ if ($max <= 1) {
+ while (defined(my $args = shift @$queue)) {
+ $cb->($args, $opt);
+ }
+ return;
+ }
+
+ # run in parallel:
+ my %pids;
+ while (@$queue) {
+ while (scalar(keys(%pids)) < $max && scalar(@$queue)) {
+ my $args = shift @$queue;
+ $pids{cb_spawn($cb, $args, $opt)} = $args;
+ }
+
+ while (scalar keys %pids) {
+ my $pid = waitpid(-1, 0);
+ my $args = delete $pids{$pid};
+ die join(' ', @$args)." failed: $?\n" if $?;
+ }
+ }
+}
+
sub run {
my ($ibx, $task, $opt) = @_; # task = 'cpdb' or 'compact'
my $cb = \&${\"PublicInbox::Xapcmd::$task"};
- progress_prepare($opt ||= {});
+ PublicInbox::Admin::progress_prepare($opt ||= {});
my $dir = $ibx->{mainrepo} or die "no mainrepo in inbox\n";
runnable_or_die($XAPIAN_COMPACT) if $opt->{compact};
my $reindex; # v1:{ from => $x40 }, v2:{ from => [ $x40, $x40, .. ] } }
my $tmp = PublicInbox::Xtmpdirs->new;
my $v = $ibx->{version} ||= 1;
my @q;
+ my $new_parts = $opt->{reshard};
+ if (defined $new_parts && $new_parts <= 0) {
+ die "--reshard must be a positive number\n";
+ }
# we want temporary directories to be as deep as possible,
- # so v2 partitions can keep "xap$SCHEMA_VERSION" on a separate FS.
+ # so v2 shards can keep "xap$SCHEMA_VERSION" on a separate FS.
if ($v == 1) {
+ if (defined $new_parts) {
+ warn
+"--reshard=$new_parts ignored for v1 $ibx->{mainrepo}\n";
+ }
my $old_parent = dirname($old);
same_fs_or_die($old_parent, $old);
- $tmp->{$old} = tempdir('xapcmd-XXXXXXXX', DIR => $old_parent);
- push @q, [ $old, $tmp->{$old} ];
+ my $v = PublicInbox::Search::SCHEMA_VERSION();
+ my $wip = tempdir("xapian$v-XXXXXXXX", DIR => $old_parent);
+ $tmp->{$old} = $wip;
+ push @q, [ $old, $wip ];
} else {
opendir my $dh, $old or die "Failed to opendir $old: $!\n";
+ my @old_parts;
while (defined(my $dn = readdir($dh))) {
- if ($dn =~ /\A\d+\z/) {
- my $tmpl = "$dn-XXXXXXXX";
- my $dst = tempdir($tmpl, DIR => $old);
- same_fs_or_die($old, $dst);
- my $cur = "$old/$dn";
- push @q, [ $cur, $dst ];
- $tmp->{$cur} = $dst;
+ if ($dn =~ /\A[0-9]+\z/) {
+ push @old_parts, $dn;
} elsif ($dn eq '.' || $dn eq '..') {
} elsif ($dn =~ /\Aover\.sqlite3/) {
} else {
warn "W: skipping unknown dir: $old/$dn\n"
}
}
- die "No Xapian parts found in $old\n" unless @q;
+ die "No Xapian parts found in $old\n" unless @old_parts;
+
+ my ($src, $max_part);
+ if (!defined($new_parts) || $new_parts == scalar(@old_parts)) {
+ # 1:1 copy
+ $max_part = scalar(@old_parts) - 1;
+ } else {
+ # M:N copy
+ $max_part = $new_parts - 1;
+ $src = [ map { "$old/$_" } @old_parts ];
+ }
+ foreach my $dn (0..$max_part) {
+ my $tmpl = "$dn-XXXXXXXX";
+ my $wip = tempdir($tmpl, DIR => $old);
+ same_fs_or_die($old, $wip);
+ my $cur = "$old/$dn";
+ push @q, [ $src // $cur , $wip ];
+ $tmp->{$cur} = $wip;
+ }
+ # mark old parts to be unlinked
+ if ($src) {
+ $tmp->{$_} ||= undef for @$src;
+ }
}
my $im = $ibx->importer(0);
my $max = $opt->{jobs} || scalar(@q);
}
delete($ibx->{$_}) for (qw(mm over search)); # cleanup
- my %pids;
- while (@q) {
- while (scalar(keys(%pids)) < $max && scalar(@q)) {
- my $args = shift @q;
- $pids{cb_spawn($cb, $args, $opt)} = $args;
- }
-
- while (scalar keys %pids) {
- my $pid = waitpid(-1, 0);
- my $args = delete $pids{$pid};
- die join(' ', @$args)." failed: $?\n" if $?;
- }
- }
+ process_queue(\@q, $cb, $max, $opt);
commit_changes($ibx, $tmp, $opt);
});
}
}
sub progress_pfx ($) {
- my @p = split('/', $_[0]);
+ my ($wip) = @_; # tempdir v2: ([0-9])+-XXXXXXXX
+ my @p = split('/', $wip);
# return "xap15/0" for v2, or "xapian15" for v1:
- ($p[-1] =~ /\A\d+\z/) ? "$p[-2]/$p[-1]" : $p[-1];
+ ($p[-1] =~ /\A([0-9]+)/) ? "$p[-2]/$1" : $p[-1];
}
# xapian-compact wrapper
defined(my $dfd = $opt->{$fd}) or next;
$rdr->{$fd} = $dfd;
}
- if ($pr) {
- $pr->("$pfx compacting...\n");
- $rdr->{1} = fileno($w) if pipe($r, $w);
- }
+ $rdr->{1} = fileno($w) if $pr && pipe($r, $w);
# we rely on --no-renumber to keep docids synched to NNTP
- my $cmd = [ $XAPIAN_COMPACT, '--no-renumber', $src, $dst ];
+ my $cmd = [ $XAPIAN_COMPACT, '--no-renumber' ];
+ for my $sw (qw(no-full fuller)) {
+ push @$cmd, "--$sw" if $opt->{$sw};
+ }
+ for my $sw (qw(blocksize)) {
+ defined(my $v = $opt->{$sw}) or next;
+ push @$cmd, "--$sw", $v;
+ }
+ $pr->("$pfx `".join(' ', @$cmd)."'\n") if $pr;
+ push @$cmd, $src, $dst;
my $pid = spawn($cmd, undef, $rdr);
if ($pr) {
close $w or die "close: \$w: $!";
}
}
-# Like copydatabase(1), this is horribly slow; and it doesn't seem due
-# to the overhead of Perl.
-sub cpdb ($$) {
- my ($args, $opt) = @_;
- my ($old, $new) = @$args;
- my $src = Search::Xapian::Database->new($old);
- my $tmp = $opt->{compact} ? "$new.compact" : $new;
+sub cpdb_loop ($$$;$$) {
+ my ($src, $dst, $pr_data, $cur_part, $new_parts) = @_;
+ my ($pr, $fmt, $nr, $pfx);
+ if ($pr_data) {
+ $pr = $pr_data->{pr};
+ $fmt = $pr_data->{fmt};
+ $nr = \($pr_data->{nr});
+ $pfx = $pr_data->{pfx};
+ }
- # like copydatabase(1), be sure we don't overwrite anything in case
- # of other bugs:
- my $creat = Search::Xapian::DB_CREATE();
- my $dst = Search::Xapian::WritableDatabase->new($tmp, $creat);
my ($it, $end);
- my ($nr, $tot, $fmt); # progress output
- my $pr = $opt->{-progress};
- my $pfx = $opt->{-progress_pfx} = progress_pfx($old);
-
do {
eval {
- # update the only metadata key for v1:
- my $lc = $src->get_metadata('last_commit');
- $dst->set_metadata('last_commit', $lc) if $lc;
-
$it = $src->postlist_begin('');
$end = $src->postlist_end('');
- if ($pr) {
- $nr = 0;
- $tot = $src->get_doccount;
- $fmt = "$pfx % ".length($tot)."u/$tot\n";
- $pr->("$pfx copying $tot documents\n");
- }
};
} while (cpdb_retryable($src, $pfx));
do {
eval {
- while ($it != $end) {
+ for (; $it != $end; $it++) {
my $docid = $it->get_docid;
+ if (defined $new_parts) {
+ my $dst_part = $docid % $new_parts;
+ next if $dst_part != $cur_part;
+ }
my $doc = $src->get_document($docid);
$dst->replace_document($docid, $doc);
- $it->inc;
- if ($pr && !(++$nr & 1023)) {
- $pr->(sprintf($fmt, $nr));
+ if ($pr_data && !(++$$nr & 1023)) {
+ $pr->(sprintf($fmt, $$nr));
}
}
# (and public-inbox does not use those features)
};
} while (cpdb_retryable($src, $pfx));
+}
+
+# Like copydatabase(1), this is horribly slow; and it doesn't seem due
+# to the overhead of Perl.
+sub cpdb ($$) {
+ my ($args, $opt) = @_;
+ my ($old, $new) = @$args;
+ my ($src, $cur_part);
+ my $new_parts;
+ if (ref($old) eq 'ARRAY') {
+ ($cur_part) = ($new =~ m!xap[0-9]+/([0-9]+)\b!);
+ defined $cur_part or
+ die "BUG: could not extract shard # from $new";
+ $new_parts = $opt->{reshard};
+ defined $new_parts or die 'BUG: got array src w/o --reshard';
+
+ # repartitioning, M:N copy means have full read access
+ foreach (@$old) {
+ if ($src) {
+ my $sub = Search::Xapian::Database->new($_);
+ $src->add_database($sub);
+ } else {
+ $src = Search::Xapian::Database->new($_);
+ }
+ }
+ } else {
+ $src = Search::Xapian::Database->new($old);
+ }
+
+ my ($xtmp, $tmp);
+ if ($opt->{compact}) {
+ my $newdir = dirname($new);
+ same_fs_or_die($newdir, $new);
+ $tmp = tempdir("$new.compact-XXXXXX", DIR => $newdir);
+ $xtmp = PublicInbox::Xtmpdirs->new;
+ $xtmp->{$new} = $tmp;
+ } else {
+ $tmp = $new;
+ }
+
+ # like copydatabase(1), be sure we don't overwrite anything in case
+ # of other bugs:
+ my $creat = Search::Xapian::DB_CREATE();
+ my $dst = Search::Xapian::WritableDatabase->new($tmp, $creat);
+ my $pr = $opt->{-progress};
+ my $pfx = $opt->{-progress_pfx} = progress_pfx($new);
+ my $pr_data = { pr => $pr, pfx => $pfx, nr => 0 } if $pr;
+
+ do {
+ eval {
+ # update the only metadata key for v1:
+ my $lc = $src->get_metadata('last_commit');
+ $dst->set_metadata('last_commit', $lc) if $lc;
+
+ # only the first xapian partition (0) gets 'indexlevel'
+ if ($new =~ m!(?:xapian[0-9]+|xap[0-9]+/0)\b!) {
+ my $l = $src->get_metadata('indexlevel');
+ if ($l eq 'medium') {
+ $dst->set_metadata('indexlevel', $l);
+ }
+ }
+ if ($pr_data) {
+ my $tot = $src->get_doccount;
+
+ # we can only estimate when repartitioning,
+ # because removed spam causes slight imbalance
+ my $est = '';
+ if (defined $cur_part && $new_parts > 1) {
+ $tot = int($tot/$new_parts);
+ $est = 'around ';
+ }
+ my $fmt = "$pfx % ".length($tot)."u/$tot\n";
+ $pr->("$pfx copying $est$tot documents\n");
+ $pr_data->{fmt} = $fmt;
+ $pr_data->{total} = $tot;
+ }
+ };
+ } while (cpdb_retryable($src, $pfx));
- $pr->(sprintf($fmt, $nr)) if $pr;
- return unless $opt->{compact};
+ if (defined $new_parts) {
+ # we rely on document IDs matching NNTP article number,
+ # so we can't have the combined DB support rewriting
+ # document IDs. Thus we iterate through each shard
+ # individually.
+ $src = undef;
+ foreach (@$old) {
+ my $old = Search::Xapian::Database->new($_);
+ cpdb_loop($old, $dst, $pr_data, $cur_part, $new_parts);
+ }
+ } else {
+ cpdb_loop($src, $dst, $pr_data);
+ }
+
+ $pr->(sprintf($pr_data->{fmt}, $pr_data->{nr})) if $pr;
+ return unless $xtmp;
$src = $dst = undef; # flushes and closes
# since $dst isn't readable by HTTP or NNTP clients, yet:
compact([ $tmp, $new ], $opt);
remove_tree($tmp) or die "failed to remove $tmp: $!\n";
+ $xtmp->done;
}
# slightly easier-to-manage manage than END{} blocks
sub done {
my ($self) = @_;
delete $owner{"$self"};
- $SIG{INT} = $SIG{HUP} = $SIG{PIPE} = $SIG{TERM} = 'DEFAULT';
+
+ my %known_pids;
+ $known_pids{$_}++ foreach values %owner;
+ if (!$known_pids{$$}) {
+ $SIG{INT} = $SIG{HUP} = $SIG{PIPE} = $SIG{TERM} = 'DEFAULT';
+ }
%$self = ();
}
my $owner_pid = delete $owner{"$self"} or return;
return if $owner_pid != $$;
foreach my $new (values %$self) {
+ defined $new or next; # may be undef if repartitioning
remove_tree($new) unless -d "$new/old";
}
- $SIG{INT} = $SIG{HUP} = $SIG{PIPE} = $SIG{TERM} = 'DEFAULT';
+ done($self);
}
1;