<?php
+/**
+ * @package MediaWiki
+ * @subpackage Maintenance
+ */
-include_once( "Article.php" );
+/** */
+require_once( 'Revision.php' );
+/** @todo document */
function compressOldPages( $start = 0 ) {
+ $fname = 'compressOldPages';
+
$chunksize = 50;
print "Starting from old_id $start...\n";
+ $dbw =& wfGetDB( DB_MASTER );
+ $old = $dbw->tableName( 'old' );
do {
$end = $start + $chunksize;
- $sql = "SELECT old_id,old_flags,old_namespace,old_title,old_text FROM old WHERE old_id>=$start ORDER BY old_id LIMIT $chunksize";
- $res = wfQuery( $sql, DB_READ, "compressOldPages" );
- if( wfNumRows( $res ) == 0 ) {
+ $res = $dbw->select( 'old', array( 'old_id','old_flags','old_namespace','old_title','old_text' ),
+ "old_id>=$start", $fname, array( 'ORDER BY' => 'old_id', 'LIMIT' => $chunksize, 'FOR UPDATE' ) );
+ if( $dbw->numRows( $res ) == 0 ) {
break;
}
$last = $start;
- while( $row = wfFetchObject( $res ) ) {
+ while( $row = $dbw->fetchObject( $res ) ) {
# print " {$row->old_id} - {$row->old_namespace}:{$row->old_title}\n";
compressPage( $row );
$last = $row->old_id;
}
- wfFreeResult( $res );
+ $dbw->freeResult( $res );
$start = $last + 1; # Deletion may leave long empty stretches
print "$start...\n";
} while( true );
}
+/** @todo document */
function compressPage( $row ) {
+ $fname = 'compressPage';
if( false !== strpos( $row->old_flags, "gzip" ) ) {
print "Already compressed row {$row->old_id}?\n";
return false;
}
+ $dbw =& wfGetDB( DB_MASTER );
$flags = $row->old_flags ? "{$row->old_flags},gzip" : "gzip";
- $compress = wfStrencode( gzdeflate( $row->old_text ) );
-
- $sql = "UPDATE old SET old_flags='$flags', old_text='$compress' WHERE old_id={$row->old_id} LIMIT 1";
- $res = wfQuery( $sql, DB_WRITE, 'compressPage' );
- return $res;
+ $compress = gzdeflate( $row->old_text );
+ $dbw->update( 'old',
+ array( /* SET */
+ 'old_flags' => $flags,
+ 'old_text' => $compress
+ ), array( /* WHERE */
+ 'old_id' => $row->old_id
+ ), $fname, 'LIMIT 1'
+ );
+ return true;
}
+define( 'LS_INDIVIDUAL', 0 );
+define( 'LS_CHUNKED', 1 );
+
+/** @todo document */
+function compressWithConcat( $startId, $maxChunkSize, $maxChunkFactor, $factorThreshold, $beginDate, $endDate )
+{
+ $fname = 'compressWithConcat';
+ $loadStyle = LS_CHUNKED;
+
+ $dbr =& wfGetDB( DB_SLAVE );
+ $dbw =& wfGetDB( DB_MASTER );
+
+ # Get all articles by page_id
+ $maxPageId = $dbr->selectField( 'page', 'max(page_id)', '', $fname );
+ $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
+ $conds = array("old_flags NOT LIKE '%object%'");
+
+ if ( $beginDate ) {
+ $conds[] = "rev_timestamp>'" . $beginDate . "'";
+ }
+ if ( $endDate ) {
+ $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();
+ }
+
+ $oldReadsSinceLastSlaveWait = 0; #check slave lag periodically
+ $totalMatchingRevisions = 0;
+ $masterPos = false;
+ for ( $pageId = $startId; $pageId <= $maxPageId; $pageId++ ) {
+ $pageRes = $dbr->select( 'page', array('page_id', 'page_namespace', 'page_title'),
+ $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( 'rev_page' => $pageRow->page_id ) + $conds,
+ $fname,
+ $revLoadOptions
+ );
+ $revs = array();
+ while ( $revRow = $dbw->fetchObject( $revRes ) ) {
+ $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( $maxChunkFactor, $factorThreshold ); $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 ( $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 = $chunk->addItem( $text );
+ $stub->setLocation( $primaryOldid );
+ $hash = $stub->getHash();
+ $stub = serialize( $stub );
+ 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 ) {
+ # Store the main object
+ $dbw->update( 'text',
+ array( /* SET */
+ 'old_text' => serialize( $chunk ),
+ 'old_flags' => 'object',
+ ), array( /* WHERE */
+ 'old_id' => $primaryOldid
+ )
+ );
+
+ # Store the stub objects
+ for ( $j = 1; $j < $thisChunkSize; $j++ ) {
+ # Skip if not compressing
+ if ( $stubs[$j] !== false ) {
+ $dbw->update( 'text',
+ array( /* SET */
+ 'old_text' => $stubs[$j],
+ 'old_flags' => 'object',
+ ), array( /* WHERE */
+ 'old_id' => $revs[$i + $j]->rev_text_id
+ )
+ );
+ }
+ }
+ }
+ # Done, next
+ print "/";
+ $dbw->commit();
+ $i += $thisChunkSize;
+ }
+ print "\n";
+ }
+ return true;
+}
?>
dépôts / lhc / web / wiklou.git / blobdiff