| 1 |
#!/usr/bin/perl -w |
| 2 |
# MasterInit |
| 3 |
# Vadim Mikheev, (c) 2000, PostgreSQL Inc. |
| 4 |
|
| 5 |
eval '(exit $?0)' && eval 'exec perl -S $0 ${1+"$@"}' |
| 6 |
& eval 'exec perl -S $0 $argv:q' |
| 7 |
if 0; |
| 8 |
|
| 9 |
BEGIN { |
| 10 |
my $basedir = $0; $basedir =~ s#/[^/]+$##; |
| 11 |
unshift(@INC, "$basedir/../share"); |
| 12 |
} |
| 13 |
|
| 14 |
use strict; |
| 15 |
use Pg; |
| 16 |
use Getopt::Long; |
| 17 |
use RServ; |
| 18 |
|
| 19 |
my $basedir = $0; $basedir =~ s#/[^/]+$#/../#; |
| 20 |
if ($basedir =~ m#^\.#) { |
| 21 |
my $pwd = `pwd`; |
| 22 |
chomp($pwd); |
| 23 |
$basedir = "$pwd/$basedir/"; |
| 24 |
} |
| 25 |
while ($basedir =~ s#/[^/.]+/\.\./#/#g) {}; |
| 26 |
while ($basedir =~ s#/\./#/#g) {}; |
| 27 |
$basedir =~ s#//#/#g; |
| 28 |
|
| 29 |
$| = 1; |
| 30 |
|
| 31 |
my ($debug,$verbose,$quiet) = (0,0,0); |
| 32 |
my ($help,$masterhost,$masterport,$masteruser,$masterpassword, |
| 33 |
$slavehost,$slaveport,$slaveuser,$slavepassword); |
| 34 |
my $lib; |
| 35 |
|
| 36 |
my $result = GetOptions( |
| 37 |
"debug!" => \$debug, "verbose!" => \$verbose, |
| 38 |
"quiet!" => \$quiet, "help" => \$help, |
| 39 |
"masterhost=s" => \$masterhost, "masterport=i" => \$masterport, |
| 40 |
"masteruser=s" => \$masteruser, "masterpassword=s" => \$masterpassword, |
| 41 |
"slavehost=s" => \$slavehost, "slaveport=i" => \$slaveport, |
| 42 |
"slaveuser=s" => \$slaveuser, "slavepassword=s" => \$slavepassword, |
| 43 |
"lib=s" => \$lib, |
| 44 |
); |
| 45 |
|
| 46 |
if (defined($help) || (scalar(@ARGV) < 2)) { |
| 47 |
print "Usage: $0 [options] masterdb slavedb |
| 48 |
Options: |
| 49 |
--masterhost=hostname --masterport=port |
| 50 |
--masteruser=username --masterpassword=string |
| 51 |
--slavehost=hostname --slaveport=port |
| 52 |
--slaveuser=username --slavepassword=string |
| 53 |
--lib=libpath |
| 54 |
"; |
| 55 |
exit ((scalar(@ARGV) < 2)? 1:0); |
| 56 |
} |
| 57 |
|
| 58 |
my $master = $ARGV[0] || "master"; |
| 59 |
my $slave = $ARGV[1] || "slave"; |
| 60 |
|
| 61 |
my $minfo = MkInfo($master,$masterhost,$masterport,$masteruser,$masterpassword); |
| 62 |
my $sinfo = MkInfo($slave,$slavehost,$slaveport,$slaveuser,$slavepassword); |
| 63 |
|
| 64 |
$masterhost = "localhost" if (! $masterhost); |
| 65 |
$slavehost = "localhost" if (! $slavehost); |
| 66 |
|
| 67 |
$RServ::debug = $debug; |
| 68 |
$RServ::verbose = $verbose; |
| 69 |
$RServ::quiet = $quiet; |
| 70 |
|
| 71 |
if (!defined($lib) || !-e $lib) { |
| 72 |
$lib = "$basedir/lib/"; |
| 73 |
|
| 74 |
if (-e "$lib/rserv.so") { |
| 75 |
$lib .= "rserv.so"; |
| 76 |
} else { |
| 77 |
print STDERR "Can't find compiled rserv.so in $lib. Go there and type make.\n"; |
| 78 |
exit 1; |
| 79 |
} |
| 80 |
} |
| 81 |
print "Using lib '$lib'\n" if ($verbose); |
| 82 |
|
| 83 |
my $mconn = Connect($minfo); |
| 84 |
my $sconn = Connect($sinfo); |
| 85 |
|
| 86 |
Exec2($mconn,$sconn,"BEGIN"); |
| 87 |
|
| 88 |
Exec2($mconn,$sconn,"set transaction isolation level serializable"); |
| 89 |
|
| 90 |
# List of slave servers |
| 91 |
Exec2($mconn,$sconn, "create table _RSERV_SERVERS_" . |
| 92 |
" (server serial primary key, host text not ". |
| 93 |
"null, port int4 default 5432, dbase text not ". |
| 94 |
"null, unique(host,port,dbase))"); |
| 95 |
|
| 96 |
# insert master server in list |
| 97 |
Exec2($mconn,$sconn,"insert into _RSERV_SERVERS_" . |
| 98 |
" (server, host, port, dbase) ". |
| 99 |
" values (0,'$masterhost',". |
| 100 |
($masterport || 5432).",". |
| 101 |
"'$master')"); |
| 102 |
|
| 103 |
# List of replicated tables |
| 104 |
Exec2($mconn,$sconn,"create table _RSERV_TABLES_" . |
| 105 |
" (tname name not null, cname name not null, ". |
| 106 |
"reloid oid primary key, key int4 not null)"); |
| 107 |
|
| 108 |
## should always call MasterDelTable |
| 109 |
#Exec($mconn,"CREATE RULE _rserv_deltrig_ AS ON delete to _RSERV_TABLES_ DO (DELETE FROM pg_trigger WHERE tgname='_rserv_trigger_t_' AND tgrelid=(SELECT oid FROM pg_class WHERE relname=old.tname);UPDATE pg_class SET reltriggers=reltriggers-1 WHERE relname=old.tname)"); |
| 110 |
|
| 111 |
# Bookkeeping log for row replication |
| 112 |
Exec2($mconn,$sconn,"create table _RSERV_LOG_" . |
| 113 |
" (reloid oid REFERENCES _RSERV_TABLES_(reloid) ON ". |
| 114 |
"DELETE CASCADE ON UPDATE CASCADE, logid int4 not ". |
| 115 |
"null, logtime timestamp not null, insert smallint, ". |
| 116 |
"update smallint, delete smallint, key text, ". |
| 117 |
"server int4, ". |
| 118 |
"CONSTRAINT only_one CHECK (insert+update+delete=1))"); |
| 119 |
|
| 120 |
# This is to speedup lookup of deleted tuples |
| 121 |
Exec2($mconn,$sconn,"create index _RSERV_LOG_INDX_DLT_ID_ on _RSERV_LOG_ ". |
| 122 |
"(delete, logid) WHERE delete = 1"); |
| 123 |
|
| 124 |
# This is to speedup lookup of updated tuples |
| 125 |
Exec2($mconn,$sconn,"create index _RSERV_LOG_INDX_UPD_ID_ on _RSERV_LOG_ ". |
| 126 |
"(update, logid) WHERE update = 1"); |
| 127 |
|
| 128 |
# This is to speedup lookup of insert tuples |
| 129 |
Exec2($mconn,$sconn,"create index _RSERV_LOG_INDX_INS_ID_ on _RSERV_LOG_ ". |
| 130 |
"(insert, logid) WHERE insert = 1"); |
| 131 |
|
| 132 |
# This is to speedup cleanup |
| 133 |
Exec2($mconn,$sconn,"create index _RSERV_LOG_INDX_TM_ID_ on _RSERV_LOG_ ". |
| 134 |
"(logtime, logid)"); |
| 135 |
|
| 136 |
# This is to speedup trigger |
| 137 |
Exec2($mconn,$sconn,"create index _RSERV_LOG_INDX_REL_KEY_ on _RSERV_LOG_ ". |
| 138 |
"(reloid, key)"); |
| 139 |
|
| 140 |
# View to help managing _rserv_log_ table |
| 141 |
Exec2($mconn,$sconn,"CREATE VIEW _RSERV_HUMAN_LOG_ AS SELECT log.logid, ". |
| 142 |
"tab.tname AS table_name, tab.cname AS column_name, ". |
| 143 |
"log.key AS column_value, log.insert, log.update, ". |
| 144 |
"log.delete, log.logtime FROM _RSERV_LOG_ log, ". |
| 145 |
"_RSERV_TABLES_ tab WHERE tab.reloid ". |
| 146 |
"= log.reloid ORDER BY log.logtime"); |
| 147 |
|
| 148 |
# View to help logging daily transactions |
| 149 |
Exec2($mconn,$sconn,"CREATE VIEW _RSERV_DAILY_LOG_ AS ". |
| 150 |
"SELECT count(*) AS \"# records\", ". |
| 151 |
"to_char(_rserv_log_.logtime, 'YYYY-MM-DD') ". |
| 152 |
"AS day FROM _rserv_log_ GROUP BY day"); |
| 153 |
|
| 154 |
# Sync point for each slave server |
| 155 |
Exec2($mconn,$sconn,"create table _RSERV_SYNC_ " . |
| 156 |
"(server int REFERENCES _RSERV_SERVERS_(server) ". |
| 157 |
"ON DELETE CASCADE ON UPDATE CASCADE, syncid int4 ". |
| 158 |
"not null, synctime timestamp, status int4 not null,". |
| 159 |
" minid int4 not null, maxid int4 not null, active text)"); |
| 160 |
|
| 161 |
Exec2($mconn,$sconn,"create index _RSERV_SYNC_INDX_SRV_ID_ on _RSERV_SYNC_ ". |
| 162 |
"(server, syncid)"); |
| 163 |
|
| 164 |
# Sync point reference numbers |
| 165 |
Exec2($mconn,$sconn,"create sequence _rserv_sync_seq_"); |
| 166 |
|
| 167 |
Exec2($mconn,$sconn,"CREATE FUNCTION _rserv_log_() RETURNS opaque" . |
| 168 |
" AS '$lib' LANGUAGE 'c'"); |
| 169 |
|
| 170 |
Exec2($mconn,$sconn,"CREATE FUNCTION _rserv_sync_(int4) RETURNS int4" . |
| 171 |
" AS '$lib' LANGUAGE 'c'"); |
| 172 |
|
| 173 |
Exec2($mconn,$sconn,"CREATE FUNCTION _rserv_debug_(int4) RETURNS int4" . |
| 174 |
" AS '$lib' LANGUAGE 'c'"); |
| 175 |
|
| 176 |
Exec2($mconn,$sconn,"CREATE FUNCTION _rserv_xid_() RETURNS int4" . |
| 177 |
" AS '$lib' LANGUAGE 'c'"); |
| 178 |
|
| 179 |
# Now, lets add the needed information in the slave database |
| 180 |
|
| 181 |
Exec2($mconn,$sconn,"create table _RSERV_SLAVE_TABLES_" . |
| 182 |
" (tname name not null, cname name not null, reloid oid not null, key int4 not null)"); |
| 183 |
|
| 184 |
Exec2($mconn,$sconn,"create table _RSERV_SLAVE_SYNC_" . |
| 185 |
" (syncid int4 not null, synctime timestamp)"); |
| 186 |
|
| 187 |
# next, let's tell the master that the slave is set up. |
| 188 |
|
| 189 |
Exec2($mconn,$sconn,"INSERT INTO _RSERV_SERVERS_ (host,dbase) VALUES ('$slavehost','$slave')"); |
| 190 |
|
| 191 |
# then commit the slave transaction |
| 192 |
|
| 193 |
Exec2($mconn,$sconn,"COMMIT"); |
| 194 |
|
| 195 |
exit (0); |
Parent Directory
| 
Revision Log