+++ /dev/null
-<?php
-/**
- * @file
- * @ingroup Maintenance ExternalStorage
- */
-
-/** @todo document */
-function compressOldPages( $start = 0, $extdb = '' ) {
- $fname = 'compressOldPages';
-
- $chunksize = 50;
- print "Starting from old_id $start...\n";
- $dbw = wfGetDB( DB_MASTER );
- do {
- $res = $dbw->select( 'text', array( 'old_id','old_flags','old_text' ),
- "old_id>=$start", $fname, array( 'ORDER BY' => 'old_id', 'LIMIT' => $chunksize, 'FOR UPDATE' ) );
- if( $dbw->numRows( $res ) == 0 ) {
- break;
- }
- $last = $start;
- foreach ( $res as $row ) {
- # print " {$row->old_id} - {$row->old_namespace}:{$row->old_title}\n";
- compressPage( $row, $extdb );
- $last = $row->old_id;
- }
- $start = $last + 1; # Deletion may leave long empty stretches
- print "$start...\n";
- } while( true );
-}
-
-/** @todo document */
-function compressPage( $row, $extdb ) {
- $fname = 'compressPage';
- if ( false !== strpos( $row->old_flags, 'gzip' ) || false !== strpos( $row->old_flags, 'object' ) ) {
- #print "Already compressed row {$row->old_id}\n";
- return false;
- }
- $dbw = wfGetDB( DB_MASTER );
- $flags = $row->old_flags ? "{$row->old_flags},gzip" : "gzip";
- $compress = gzdeflate( $row->old_text );
-
- # Store in external storage if required
- if ( $extdb !== '' ) {
- $storeObj = new ExternalStoreDB;
- $compress = $storeObj->store( $extdb, $compress );
- if ( $compress === false ) {
- print "Unable to store object\n";
- return false;
- }
- }
-
- # Update text row
- $dbw->update( 'text',
- array( /* SET */
- 'old_flags' => $flags,
- 'old_text' => $compress
- ), array( /* WHERE */
- 'old_id' => $row->old_id
- ), $fname,
- array( 'LIMIT' => 1 )
- );
- return true;
-}
-
-define( 'LS_INDIVIDUAL', 0 );
-define( 'LS_CHUNKED', 1 );
-
-/** @todo document */
-function compressWithConcat( $startId, $maxChunkSize, $beginDate,
- $endDate, $extdb="", $maxPageId = false )
-{
- $fname = 'compressWithConcat';
- $loadStyle = LS_CHUNKED;
-
- $dbr = wfGetDB( DB_SLAVE );
- $dbw = wfGetDB( DB_MASTER );
-
- # Set up external storage
- if ( $extdb != '' ) {
- $storeObj = new ExternalStoreDB;
- }
-
- # Get all articles by page_id
- if ( !$maxPageId ) {
- $maxPageId = $dbr->selectField( 'page', 'max(page_id)', '', $fname );
- }
- print "Starting from $startId of $maxPageId\n";
- $pageConds = array();
-
- /*
- if ( $exclude_ns0 ) {
- print "Excluding main namespace\n";
- $pageConds[] = 'page_namespace<>0';
- }
- if ( $queryExtra ) {
- $pageConds[] = $queryExtra;
- }
- */
-
- # For each article, get a list of revisions which fit the criteria
-
- # No recompression, use a condition on old_flags
- # Don't compress object type entities, because that might produce data loss when
- # overwriting bulk storage concat rows. Don't compress external references, because
- # the script doesn't yet delete rows from external storage.
- $conds = array(
- 'old_flags NOT ' . $dbr->buildLike( $dbr->anyString(), 'object', $dbr->anyString() ) . ' AND old_flags NOT '
- . $dbr->buildLike( $dbr->anyString(), 'external', $dbr->anyString() ) );
-
- if ( $beginDate ) {
- if ( !preg_match( '/^\d{14}$/', $beginDate ) ) {
- print "Invalid begin date \"$beginDate\"\n";
- return false;
- }
- $conds[] = "rev_timestamp>'" . $beginDate . "'";
- }
- if ( $endDate ) {
- if ( !preg_match( '/^\d{14}$/', $endDate ) ) {
- print "Invalid end date \"$endDate\"\n";
- return false;
- }
- $conds[] = "rev_timestamp<'" . $endDate . "'";
- }
- if ( $loadStyle == LS_CHUNKED ) {
- $tables = array( 'revision', 'text' );
- $fields = array( 'rev_id', 'rev_text_id', 'old_flags', 'old_text' );
- $conds[] = 'rev_text_id=old_id';
- $revLoadOptions = 'FOR UPDATE';
- } else {
- $tables = array( 'revision' );
- $fields = array( 'rev_id', 'rev_text_id' );
- $revLoadOptions = array();
- }
-
- # Don't work with current revisions
- # Don't lock the page table for update either -- TS 2006-04-04
- #$tables[] = 'page';
- #$conds[] = 'page_id=rev_page AND rev_id != page_latest';
-
- for ( $pageId = $startId; $pageId <= $maxPageId; $pageId++ ) {
- wfWaitForSlaves( 5 );
-
- # Wake up
- $dbr->ping();
-
- # Get the page row
- $pageRes = $dbr->select( 'page',
- array('page_id', 'page_namespace', 'page_title','page_latest'),
- $pageConds + array('page_id' => $pageId), $fname );
- if ( $dbr->numRows( $pageRes ) == 0 ) {
- continue;
- }
- $pageRow = $dbr->fetchObject( $pageRes );
-
- # Display progress
- $titleObj = Title::makeTitle( $pageRow->page_namespace, $pageRow->page_title );
- print "$pageId\t" . $titleObj->getPrefixedDBkey() . " ";
-
- # Load revisions
- $revRes = $dbw->select( $tables, $fields,
- array_merge( array(
- 'rev_page' => $pageRow->page_id,
- # Don't operate on the current revision
- # Use < instead of <> in case the current revision has changed
- # since the page select, which wasn't locking
- 'rev_id < ' . $pageRow->page_latest
- ), $conds ),
- $fname,
- $revLoadOptions
- );
- $revs = array();
- foreach ( $revRes as $revRow ) {
- $revs[] = $revRow;
- }
-
- if ( count( $revs ) < 2) {
- # No revisions matching, no further processing
- print "\n";
- continue;
- }
-
- # For each chunk
- $i = 0;
- while ( $i < count( $revs ) ) {
- if ( $i < count( $revs ) - $maxChunkSize ) {
- $thisChunkSize = $maxChunkSize;
- } else {
- $thisChunkSize = count( $revs ) - $i;
- }
-
- $chunk = new ConcatenatedGzipHistoryBlob();
- $stubs = array();
- $dbw->begin();
- $usedChunk = false;
- $primaryOldid = $revs[$i]->rev_text_id;
-
- # Get the text of each revision and add it to the object
- for ( $j = 0; $j < $thisChunkSize && $chunk->isHappy(); $j++ ) {
- $oldid = $revs[$i + $j]->rev_text_id;
-
- # Get text
- if ( $loadStyle == LS_INDIVIDUAL ) {
- $textRow = $dbw->selectRow( 'text',
- array( 'old_flags', 'old_text' ),
- array( 'old_id' => $oldid ),
- $fname,
- 'FOR UPDATE'
- );
- $text = Revision::getRevisionText( $textRow );
- } else {
- $text = Revision::getRevisionText( $revs[$i + $j] );
- }
-
- if ( $text === false ) {
- print "\nError, unable to get text in old_id $oldid\n";
- #$dbw->delete( 'old', array( 'old_id' => $oldid ) );
- }
-
- if ( $extdb == "" && $j == 0 ) {
- $chunk->setText( $text );
- print '.';
- } else {
- # Don't make a stub if it's going to be longer than the article
- # Stubs are typically about 100 bytes
- if ( strlen( $text ) < 120 ) {
- $stub = false;
- print 'x';
- } else {
- $stub = new HistoryBlobStub( $chunk->addItem( $text ) );
- $stub->setLocation( $primaryOldid );
- $stub->setReferrer( $oldid );
- print '.';
- $usedChunk = true;
- }
- $stubs[$j] = $stub;
- }
- }
- $thisChunkSize = $j;
-
- # If we couldn't actually use any stubs because the pages were too small, do nothing
- if ( $usedChunk ) {
- if ( $extdb != "" ) {
- # Move blob objects to External Storage
- $stored = $storeObj->store( $extdb, serialize( $chunk ));
- if ($stored === false) {
- print "Unable to store object\n";
- return false;
- }
- # Store External Storage URLs instead of Stub placeholders
- foreach ($stubs as $stub) {
- if ($stub===false)
- continue;
- # $stored should provide base path to a BLOB
- $url = $stored."/".$stub->getHash();
- $dbw->update( 'text',
- array( /* SET */
- 'old_text' => $url,
- 'old_flags' => 'external,utf-8',
- ), array ( /* WHERE */
- 'old_id' => $stub->getReferrer(),
- )
- );
- }
- } else {
- # Store the main object locally
- $dbw->update( 'text',
- array( /* SET */
- 'old_text' => serialize( $chunk ),
- 'old_flags' => 'object,utf-8',
- ), array( /* WHERE */
- 'old_id' => $primaryOldid
- )
- );
-
- # Store the stub objects
- for ( $j = 1; $j < $thisChunkSize; $j++ ) {
- # Skip if not compressing and don't overwrite the first revision
- if ( $stubs[$j] !== false && $revs[$i + $j]->rev_text_id != $primaryOldid ) {
- $dbw->update( 'text',
- array( /* SET */
- 'old_text' => serialize($stubs[$j]),
- 'old_flags' => 'object,utf-8',
- ), array( /* WHERE */
- 'old_id' => $revs[$i + $j]->rev_text_id
- )
- );
- }
- }
- }
- }
- # Done, next
- print "/";
- $dbw->commit();
- $i += $thisChunkSize;
- wfWaitForSlaves( 5 );
- }
- print "\n";
- }
- return true;
-}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff