X-Git-Url: https://git.heureux-cyclage.org/?a=blobdiff_plain;f=maintenance%2FconvertLinks.php;h=85ef5c8c70d52a563cb56757f2afdf53548af3f5;hb=30cc0501e227255e0e581d029754ee3e16c06297;hp=bc0aef490d7f6e0b19cdc4c15a74f6fc5e45c5c5;hpb=a15c419b3d130248f2556b9d00643ba9666a4189;p=lhc%2Fweb%2Fwiklou.git diff --git a/maintenance/convertLinks.php b/maintenance/convertLinks.php index bc0aef490d..85ef5c8c70 100644 --- a/maintenance/convertLinks.php +++ b/maintenance/convertLinks.php @@ -3,13 +3,252 @@ * Convert from the old links schema (string->ID) to the new schema (ID->ID) * The wiki should be put into read-only mode while this script executes * - * @addtogroup Maintenance + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * http://www.gnu.org/copyleft/gpl.html + * + * @file + * @ingroup Maintenance */ -/** */ -require_once( "commandLine.inc" ); -require_once( "convertLinks.inc" ); +require_once( dirname( __FILE__ ) . '/Maintenance.php' ); + +class ConvertLinks extends Maintenance { + private $logPerformance; + + public function __construct() { + parent::__construct(); + $this->mDescription = "Convert from the old links schema (string->ID) to the new schema (ID->ID) +The wiki should be put into read-only mode while this script executes"; + + $this->addArg( 'logperformance', "Log performance to perfLogFilename.", false ); + $this->addArg( 'perfLogFilename', "Filename where performance is logged if --logperformance was set (defaults to 'convLinksPerf.txt').", false ); + $this->addArg( 'keep-links-table', "Don't overwrite the old links table with the new one, leave the new table at links_temp.", false ); + $this->addArg( 'nokeys', "Don't create keys, and so allow duplicates in the new links table.\n +This gives a huge speed improvement for very large links tables which are MyISAM." /* (What about InnoDB?) */, false ); + } + + public function getDbType() { + return Maintenance::DB_ADMIN; + } + + public function execute() { + $dbw = wfGetDB( DB_MASTER ); + + $type = $dbw->getType(); + if ( $type != 'mysql' ) { + $this->output( "Link table conversion not necessary for $type\n" ); + return; + } + + global $wgContLang; + + $numBadLinks = $curRowsRead = 0; # counters etc + $totalTuplesInserted = 0; # total tuples INSERTed into links_temp + + $reportCurReadProgress = true; # whether or not to give progress reports while reading IDs from cur table + $curReadReportInterval = 1000; # number of rows between progress reports + + $reportLinksConvProgress = true; # whether or not to give progress reports during conversion + $linksConvInsertInterval = 1000; # number of rows per INSERT + + $initialRowOffset = 0; + # $finalRowOffset = 0; # not used yet; highest row number from links table to process + + $overwriteLinksTable = !$this->hasOption( 'keep-links-table' ); + $noKeys = $this->hasOption( 'noKeys' ); + $this->logPerformance = $this->hasOption( 'logperformance' ); + $perfLogFilename = $this->getArg( 'perfLogFilename', "convLinksPerf.txt" ); + + # -------------------------------------------------------------------- + + list ( $cur, $links, $links_temp, $links_backup ) = $dbw->tableNamesN( 'cur', 'links', 'links_temp', 'links_backup' ); + + if( $dbw->tableExists( 'pagelinks' ) ) { + $this->output( "...have pagelinks; skipping old links table updates\n" ); + return; + } + + $res = $dbw->query( "SELECT l_from FROM $links LIMIT 1" ); + if ( $dbw->fieldType( $res, 0 ) == "int" ) { + $this->output( "Schema already converted\n" ); + return; + } + + $res = $dbw->query( "SELECT COUNT(*) AS count FROM $links" ); + $row = $dbw->fetchObject( $res ); + $numRows = $row->count; + $dbw->freeResult( $res ); + + if ( $numRows == 0 ) { + $this->output( "Updating schema (no rows to convert)...\n" ); + $this->createTempTable(); + } else { + $fh = false; + if ( $this->logPerformance ) { + $fh = fopen ( $perfLogFilename, "w" ); + if ( !$fh ) { + $this->error( "Couldn't open $perfLogFilename" ); + $this->logPerformance = false; + } + } + $baseTime = $startTime = $this->getMicroTime(); + # Create a title -> cur_id map + $this->output( "Loading IDs from $cur table...\n" ); + $this->performanceLog ( $fh, "Reading $numRows rows from cur table...\n" ); + $this->performanceLog ( $fh, "rows read vs seconds elapsed:\n" ); + + $dbw->bufferResults( false ); + $res = $dbw->query( "SELECT cur_namespace,cur_title,cur_id FROM $cur" ); + $ids = array(); + + foreach ( $res as $row ) { + $title = $row->cur_title; + if ( $row->cur_namespace ) { + $title = $wgContLang->getNsText( $row->cur_namespace ) . ":$title"; + } + $ids[$title] = $row->cur_id; + $curRowsRead++; + if ( $reportCurReadProgress ) { + if ( ( $curRowsRead % $curReadReportInterval ) == 0 ) { + $this->performanceLog( $fh, $curRowsRead . " " . ( $this->getMicroTime() - $baseTime ) . "\n" ); + $this->output( "\t$curRowsRead rows of $cur table read.\n" ); + } + } + } + $dbw->freeResult( $res ); + $dbw->bufferResults( true ); + $this->output( "Finished loading IDs.\n\n" ); + $this->performanceLog( $fh, "Took " . ( $this->getMicroTime() - $baseTime ) . " seconds to load IDs.\n\n" ); + + # -------------------------------------------------------------------- + + # Now, step through the links table (in chunks of $linksConvInsertInterval rows), + # convert, and write to the new table. + $this->createTempTable(); + $this->performanceLog( $fh, "Resetting timer.\n\n" ); + $baseTime = $this->getMicroTime(); + $this->output( "Processing $numRows rows from $links table...\n" ); + $this->performanceLog( $fh, "Processing $numRows rows from $links table...\n" ); + $this->performanceLog( $fh, "rows inserted vs seconds elapsed:\n" ); + + for ( $rowOffset = $initialRowOffset; $rowOffset < $numRows; $rowOffset += $linksConvInsertInterval ) { + $sqlRead = "SELECT * FROM $links "; + $sqlRead = $dbw->limitResult( $sqlRead, $linksConvInsertInterval, $rowOffset ); + $res = $dbw->query( $sqlRead ); + if ( $noKeys ) { + $sqlWrite = array( "INSERT INTO $links_temp (l_from,l_to) VALUES " ); + } else { + $sqlWrite = array( "INSERT IGNORE INTO $links_temp (l_from,l_to) VALUES " ); + } + + $tuplesAdded = 0; # no tuples added to INSERT yet + foreach ( $res as $row ) { + $fromTitle = $row->l_from; + if ( array_key_exists( $fromTitle, $ids ) ) { # valid title + $from = $ids[$fromTitle]; + $to = $row->l_to; + if ( $tuplesAdded != 0 ) { + $sqlWrite[] = ","; + } + $sqlWrite[] = "($from,$to)"; + $tuplesAdded++; + } else { # invalid title + $numBadLinks++; + } + } + $dbw->freeResult( $res ); + # $this->output( "rowOffset: $rowOffset\ttuplesAdded: $tuplesAdded\tnumBadLinks: $numBadLinks\n" ); + if ( $tuplesAdded != 0 ) { + if ( $reportLinksConvProgress ) { + $this->output( "Inserting $tuplesAdded tuples into $links_temp..." ); + } + $dbw->query( implode( "", $sqlWrite ) ); + $totalTuplesInserted += $tuplesAdded; + if ( $reportLinksConvProgress ) + $this->output( " done. Total $totalTuplesInserted tuples inserted.\n" ); + $this->performanceLog( $fh, $totalTuplesInserted . " " . ( $this->getMicroTime() - $baseTime ) . "\n" ); + } + } + $this->output( "$totalTuplesInserted valid titles and $numBadLinks invalid titles were processed.\n\n" ); + $this->performanceLog( $fh, "$totalTuplesInserted valid titles and $numBadLinks invalid titles were processed.\n" ); + $this->performanceLog( $fh, "Total execution time: " . ( $this->getMicroTime() - $startTime ) . " seconds.\n" ); + if ( $this->logPerformance ) { + fclose ( $fh ); + } + } + # -------------------------------------------------------------------- + + if ( $overwriteLinksTable ) { + # Check for existing links_backup, and delete it if it exists. + $this->output( "Dropping backup links table if it exists..." ); + $dbw->query( "DROP TABLE IF EXISTS $links_backup", __METHOD__ ); + $this->output( " done.\n" ); + + # Swap in the new table, and move old links table to links_backup + $this->output( "Swapping tables '$links' to '$links_backup'; '$links_temp' to '$links'..." ); + $dbw->query( "RENAME TABLE links TO $links_backup, $links_temp TO $links", __METHOD__ ); + $this->output( " done.\n\n" ); + + $dbw->close(); + $this->output( "Conversion complete. The old table remains at $links_backup;\n" ); + $this->output( "delete at your leisure.\n" ); + } else { + $this->output( "Conversion complete. The converted table is at $links_temp;\n" ); + $this->output( "the original links table is unchanged.\n" ); + } + } + + private function createTempTable() { + $dbConn = wfGetDB( DB_MASTER ); + + if ( !( $dbConn->isOpen() ) ) { + $this->output( "Opening connection to database failed.\n" ); + return; + } + $links_temp = $dbConn->tableName( 'links_temp' ); + + $this->output( "Dropping temporary links table if it exists..." ); + $dbConn->query( "DROP TABLE IF EXISTS $links_temp" ); + $this->output( " done.\n" ); + + $this->output( "Creating temporary links table..." ); + if ( $this->hasOption( 'noKeys' ) ) { + $dbConn->query( "CREATE TABLE $links_temp ( " . + "l_from int(8) unsigned NOT NULL default '0', " . + "l_to int(8) unsigned NOT NULL default '0')" ); + } else { + $dbConn->query( "CREATE TABLE $links_temp ( " . + "l_from int(8) unsigned NOT NULL default '0', " . + "l_to int(8) unsigned NOT NULL default '0', " . + "UNIQUE KEY l_from(l_from,l_to), " . + "KEY (l_to))" ); + } + $this->output( " done.\n\n" ); + } -convertLinks(); + private function performanceLog( $fh, $text ) { + if ( $this->logPerformance ) { + fwrite( $fh, $text ); + } + } + private function getMicroTime() { # return time in seconds, with microsecond accuracy + list( $usec, $sec ) = explode( " ", microtime() ); + return ( (float)$usec + (float)$sec ); + } +} +$maintClass = "ConvertLinks"; +require_once( RUN_MAINTENANCE_IF_MAIN );