trunk/bin/couchdb2shards.pl

#!/usr/bin/perl

# http://wiki.apache.org/couchdb/HTTP_Bulk_Document_API

use warnings;
use strict;

use IO::Socket::INET;
use Storable qw();
use JSON;
use Data::Dump qw(dump);
use Time::HiRes qw(time);
use File::Path qw(make_path remove_tree);

my $name = 'pxelator';
my $shard_size = 5000;


my $path = "/tmp/sack/$name";
remove_tree $path;
make_path $path;


sub couchdb_socket {
        IO::Socket::INET->new(
                PeerAddr => '10.60.0.91',
                PeerPort => 5984,
                Proto => 'tcp',
        ) || die $!;
}

sub get_chunk {
        my $sock = shift;
        my $chunk;
        while(<$sock>) {
                $chunk .= $_;
                last if /^[\n\r]+$/;
        }
#       warn "# $sock\n$chunk\n";
        return $chunk;
}

my $sock = couchdb_socket;

print $sock "GET /$name/_all_docs?include_docs=true HTTP/1.0\r\n\r\n";

get_chunk($sock);

my $total = <$sock>;
$total =~ s{^.*total_rows\D+(\d+).+$}{$1};
warn "# total: $total\n";

our $shard;
our $shard_nr = 0;
my $t_start = time();
my $total_bytes;

sub save_shard {
        my $shard_path = sprintf("%s/%06d.%d", $path, $shard_nr++ * $shard_size, $shard_size);
        Storable::store( $shard, $shard_path );

        my $dt = time() - $t_start;
        my $pos = $shard_nr * $shard_size;
        my $rec_s = $pos / $dt;
        my $end_t = ( $total / $rec_s ) - $dt;
        my $shard_size = -s $shard_path;

        warn sprintf "shard %s %d bytes\t%8.2f%% %8.2f/s  ETA %d:%02ds\n"
                , $shard_path, $shard_size
                , $pos * 100 / $total
                , $rec_s,
                , $end_t / 60, $end_t % 60
                ;

        $total_bytes += $shard_size;

        $shard = [];
}

while(<$sock>) {
        if ( /"id":"([^"]+)"/ ) {

                s/,[\r\n]+$//; # cleanup JSON
                my $json = from_json( $_ );
                push @$shard, $json->{doc};
                save_shard if $#{ $shard } == $shard_size;
        } else {
                warn "UNKNOWN: $_";
        }
}
save_shard;

warn "sharded $path $total_bytes bytes\n"; 
1	#!/usr/bin/perl
2
3	# http://wiki.apache.org/couchdb/HTTP_Bulk_Document_API
4
5	use warnings;
6	use strict;
7
8	use IO::Socket::INET;
9	use Storable qw();
10	use JSON;
11	use Data::Dump qw(dump);
12	use Time::HiRes qw(time);
13	use File::Path qw(make_path remove_tree);
14
15	my $name = 'pxelator';
16	my $shard_size = 5000;
17
18
19	my $path = "/tmp/sack/$name";
20	remove_tree $path;
21	make_path $path;
22
23
24	sub couchdb_socket {
25	IO::Socket::INET->new(
26	PeerAddr => '10.60.0.91',
27	PeerPort => 5984,
28	Proto => 'tcp',
29	) \|\| die $!;
30	}
31
32	sub get_chunk {
33	my $sock = shift;
34	my $chunk;
35	while(<$sock>) {
36	$chunk .= $_;
37	last if /^[\n\r]+$/;
38	}
39	# warn "# $sock\n$chunk\n";
40	return $chunk;
41	}
42
43	my $sock = couchdb_socket;
44
45	print $sock "GET /$name/_all_docs?include_docs=true HTTP/1.0\r\n\r\n";
46
47	get_chunk($sock);
48
49	my $total = <$sock>;
50	$total =~ s{^.*total_rows\D+(\d+).+$}{$1};
51	warn "# total: $total\n";
52
53	our $shard;
54	our $shard_nr = 0;
55	my $t_start = time();
56	my $total_bytes;
57
58	sub save_shard {
59	my $shard_path = sprintf("%s/%06d.%d", $path, $shard_nr++ * $shard_size, $shard_size);
60	Storable::store( $shard, $shard_path );
61
62	my $dt = time() - $t_start;
63	my $pos = $shard_nr * $shard_size;
64	my $rec_s = $pos / $dt;
65	my $end_t = ( $total / $rec_s ) - $dt;
66	my $shard_size = -s $shard_path;
67
68	warn sprintf "shard %s %d bytes\t%8.2f%% %8.2f/s ETA %d:%02ds\n"
69	, $shard_path, $shard_size
70	, $pos * 100 / $total
71	, $rec_s,
72	, $end_t / 60, $end_t % 60
73	;
74
75	$total_bytes += $shard_size;
76
77	$shard = [];
78	}
79
80	while(<$sock>) {
81	if ( /"id":"([^"]+)"/ ) {
82
83	s/,[\r\n]+$//; # cleanup JSON
84	my $json = from_json( $_ );
85	push @$shard, $json->{doc};
86	save_shard if $#{ $shard } == $shard_size;
87	} else {
88	warn "UNKNOWN: $_";
89	}
90	}
91	save_shard;
92
93	warn "sharded $path $total_bytes bytes\n";