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-rw-r--r--maintenance/storage/blobs.sql8
-rw-r--r--maintenance/storage/checkStorage.php468
-rw-r--r--maintenance/storage/compressOld.inc300
-rw-r--r--maintenance/storage/compressOld.php82
-rw-r--r--maintenance/storage/dumpRev.php14
-rwxr-xr-xmaintenance/storage/make-blobs11
-rw-r--r--maintenance/storage/moveToExternal.php97
-rw-r--r--maintenance/storage/resolveStubs.php100
8 files changed, 1080 insertions, 0 deletions
diff --git a/maintenance/storage/blobs.sql b/maintenance/storage/blobs.sql
new file mode 100644
index 00000000..5782ac47
--- /dev/null
+++ b/maintenance/storage/blobs.sql
@@ -0,0 +1,8 @@
+-- Blobs table for external storage
+
+CREATE TABLE /*$wgDBprefix*/blobs (
+ blob_id int(8) NOT NULL AUTO_INCREMENT,
+ blob_text mediumtext,
+ PRIMARY KEY (blob_id)
+) TYPE=InnoDB;
+
diff --git a/maintenance/storage/checkStorage.php b/maintenance/storage/checkStorage.php
new file mode 100644
index 00000000..a83d2744
--- /dev/null
+++ b/maintenance/storage/checkStorage.php
@@ -0,0 +1,468 @@
+<?php
+
+/**
+ * Fsck for MediaWiki
+ */
+
+define( 'CONCAT_HEADER', 'O:27:"concatenatedgziphistoryblob"' );
+
+if ( !defined( 'MEDIAWIKI' ) ) {
+ require_once( dirname(__FILE__) . '/../commandLine.inc' );
+ require_once( 'ExternalStore.php' );
+ require_once( 'ExternalStoreDB.php' );
+ require_once( 'SpecialImport.php' );
+
+ $cs = new CheckStorage;
+ $fix = isset( $options['fix'] );
+ if ( isset( $args[0] ) ) {
+ $xml = $args[0];
+ } else {
+ $xml = false;
+ }
+ $cs->check( $fix, $xml );
+}
+
+
+//----------------------------------------------------------------------------------
+
+class CheckStorage
+{
+ var $oldIdMap, $errors;
+ var $dbStore = null;
+
+ var $errorDescriptions = array(
+ 'restore text' => 'Damaged text, need to be restored from a backup',
+ 'restore revision' => 'Damaged revision row, need to be restored from a backup',
+ 'unfixable' => 'Unexpected errors with no automated fixing method',
+ 'fixed' => 'Errors already fixed',
+ 'fixable' => 'Errors which would already be fixed if --fix was specified',
+ );
+
+ function check( $fix = false, $xml = '' ) {
+ $fname = 'checkStorage';
+ $dbr =& wfGetDB( DB_SLAVE );
+ if ( $fix ) {
+ $dbw =& wfGetDB( DB_MASTER );
+ print "Checking, will fix errors if possible...\n";
+ } else {
+ print "Checking...\n";
+ }
+ $maxRevId = $dbr->selectField( 'revision', 'MAX(rev_id)', false, $fname );
+ $chunkSize = 1000;
+ $flagStats = array();
+ $objectStats = array();
+ $knownFlags = array( 'external', 'gzip', 'object', 'utf-8' );
+ $this->errors = array(
+ 'restore text' => array(),
+ 'restore revision' => array(),
+ 'unfixable' => array(),
+ 'fixed' => array(),
+ 'fixable' => array(),
+ );
+
+ for ( $chunkStart = 1 ; $chunkStart < $maxRevId; $chunkStart += $chunkSize ) {
+ $chunkEnd = $chunkStart + $chunkSize - 1;
+ //print "$chunkStart of $maxRevId\n";
+
+ // Fetch revision rows
+ $this->oldIdMap = array();
+ $dbr->ping();
+ $res = $dbr->select( 'revision', array( 'rev_id', 'rev_text_id' ),
+ array( "rev_id BETWEEN $chunkStart AND $chunkEnd" ), $fname );
+ while ( $row = $dbr->fetchObject( $res ) ) {
+ $this->oldIdMap[$row->rev_id] = $row->rev_text_id;
+ }
+ $dbr->freeResult( $res );
+
+ if ( !count( $this->oldIdMap ) ) {
+ continue;
+ }
+
+ // Fetch old_flags
+ $missingTextRows = array_flip( $this->oldIdMap );
+ $externalRevs = array();
+ $objectRevs = array();
+ $res = $dbr->select( 'text', array( 'old_id', 'old_flags' ),
+ 'old_id IN (' . implode( ',', $this->oldIdMap ) . ')', $fname );
+ while ( $row = $dbr->fetchObject( $res ) ) {
+ $flags = $row->old_flags;
+ $id = $row->old_id;
+
+ // Create flagStats row if it doesn't exist
+ $flagStats = $flagStats + array( $flags => 0 );
+ // Increment counter
+ $flagStats[$flags]++;
+
+ // Not missing
+ unset( $missingTextRows[$row->old_id] );
+
+ // Check for external or object
+ if ( $flags == '' ) {
+ $flagArray = array();
+ } else {
+ $flagArray = explode( ',', $flags );
+ }
+ if ( in_array( 'external', $flagArray ) ) {
+ $externalRevs[] = $id;
+ } elseif ( in_array( 'object', $flagArray ) ) {
+ $objectRevs[] = $id;
+ }
+
+ // Check for unrecognised flags
+ if ( $flags == '0' ) {
+ // This is a known bug from 2004
+ // It's safe to just erase the old_flags field
+ if ( $fix ) {
+ $this->error( 'fixed', "Warning: old_flags set to 0", $id );
+ $dbw->ping();
+ $dbw->update( 'text', array( 'old_flags' => '' ),
+ array( 'old_id' => $id ), $fname );
+ echo "Fixed\n";
+ } else {
+ $this->error( 'fixable', "Warning: old_flags set to 0", $id );
+ }
+ } elseif ( count( array_diff( $flagArray, $knownFlags ) ) ) {
+ $this->error( 'unfixable', "Error: invalid flags field \"$flags\"", $id );
+ }
+ }
+ $dbr->freeResult( $res );
+
+ // Output errors for any missing text rows
+ foreach ( $missingTextRows as $oldId => $revId ) {
+ $this->error( 'restore revision', "Error: missing text row", $oldId );
+ }
+
+ // Verify external revisions
+ $externalConcatBlobs = array();
+ $externalNormalBlobs = array();
+ if ( count( $externalRevs ) ) {
+ $res = $dbr->select( 'text', array( 'old_id', 'old_flags', 'old_text' ),
+ array( 'old_id IN (' . implode( ',', $externalRevs ) . ')' ), $fname );
+ while ( $row = $dbr->fetchObject( $res ) ) {
+ $urlParts = explode( '://', $row->old_text, 2 );
+ if ( count( $urlParts ) !== 2 || $urlParts[1] == '' ) {
+ $this->error( 'restore text', "Error: invalid URL \"{$row->old_text}\"", $row->old_id );
+ continue;
+ }
+ list( $proto, $path ) = $urlParts;
+ if ( $proto != 'DB' ) {
+ $this->error( 'restore text', "Error: invalid external protocol \"$proto\"", $row->old_id );
+ continue;
+ }
+ $path = explode( '/', $row->old_text );
+ $cluster = $path[2];
+ $id = $path[3];
+ if ( isset( $path[4] ) ) {
+ $externalConcatBlobs[$cluster][$id][] = $row->old_id;
+ } else {
+ $externalNormalBlobs[$cluster][$id][] = $row->old_id;
+ }
+ }
+ $dbr->freeResult( $res );
+ }
+
+ // Check external concat blobs for the right header
+ $this->checkExternalConcatBlobs( $externalConcatBlobs );
+
+ // Check external normal blobs for existence
+ if ( count( $externalNormalBlobs ) ) {
+ if ( is_null( $this->dbStore ) ) {
+ $this->dbStore = new ExternalStoreDB;
+ }
+ foreach ( $externalConcatBlobs as $cluster => $xBlobIds ) {
+ $blobIds = array_keys( $xBlobIds );
+ $extDb =& $this->dbStore->getSlave( $cluster );
+ $blobsTable = $this->dbStore->getTable( $extDb );
+ $res = $extDb->select( $blobsTable,
+ array( 'blob_id' ),
+ array( 'blob_id IN( ' . implode( ',', $blobIds ) . ')' ), $fname );
+ while ( $row = $extDb->fetchObject( $res ) ) {
+ unset( $xBlobIds[$row->blob_id] );
+ }
+ $extDb->freeResult( $res );
+ // Print errors for missing blobs rows
+ foreach ( $xBlobIds as $blobId => $oldId ) {
+ $this->error( 'restore text', "Error: missing target $blobId for one-part ES URL", $oldId );
+ }
+ }
+ }
+
+ // Check local objects
+ $dbr->ping();
+ $concatBlobs = array();
+ $curIds = array();
+ if ( count( $objectRevs ) ) {
+ $headerLength = 300;
+ $res = $dbr->select( 'text', array( 'old_id', 'old_flags', "LEFT(old_text, $headerLength) AS header" ),
+ array( 'old_id IN (' . implode( ',', $objectRevs ) . ')' ), $fname );
+ while ( $row = $dbr->fetchObject( $res ) ) {
+ $oldId = $row->old_id;
+ if ( !preg_match( '/^O:(\d+):"(\w+)"/', $row->header, $matches ) ) {
+ $this->error( 'restore text', "Error: invalid object header", $oldId );
+ continue;
+ }
+
+ $className = strtolower( $matches[2] );
+ if ( strlen( $className ) != $matches[1] ) {
+ $this->error( 'restore text', "Error: invalid object header, wrong class name length", $oldId );
+ continue;
+ }
+
+ $objectStats = $objectStats + array( $className => 0 );
+ $objectStats[$className]++;
+
+ switch ( $className ) {
+ case 'concatenatedgziphistoryblob':
+ // Good
+ break;
+ case 'historyblobstub':
+ case 'historyblobcurstub':
+ if ( strlen( $row->header ) == $headerLength ) {
+ $this->error( 'unfixable', "Error: overlong stub header", $oldId );
+ continue;
+ }
+ $stubObj = unserialize( $row->header );
+ if ( !is_object( $stubObj ) ) {
+ $this->error( 'restore text', "Error: unable to unserialize stub object", $oldId );
+ continue;
+ }
+ if ( $className == 'historyblobstub' ) {
+ $concatBlobs[$stubObj->mOldId][] = $oldId;
+ } else {
+ $curIds[$stubObj->mCurId][] = $oldId;
+ }
+ break;
+ default:
+ $this->error( 'unfixable', "Error: unrecognised object class \"$className\"", $oldId );
+ }
+ }
+ $dbr->freeResult( $res );
+ }
+
+ // Check local concat blob validity
+ $externalConcatBlobs = array();
+ if ( count( $concatBlobs ) ) {
+ $headerLength = 300;
+ $res = $dbr->select( 'text', array( 'old_id', 'old_flags', "LEFT(old_text, $headerLength) AS header" ),
+ array( 'old_id IN (' . implode( ',', array_keys( $concatBlobs ) ) . ')' ), $fname );
+ while ( $row = $dbr->fetchObject( $res ) ) {
+ $flags = explode( ',', $row->old_flags );
+ if ( in_array( 'external', $flags ) ) {
+ // Concat blob is in external storage?
+ if ( in_array( 'object', $flags ) ) {
+ $urlParts = explode( '/', $row->header );
+ if ( $urlParts[0] != 'DB:' ) {
+ $this->error( 'unfixable', "Error: unrecognised external storage type \"{$urlParts[0]}", $row->old_id );
+ } else {
+ $cluster = $urlParts[2];
+ $id = $urlParts[3];
+ if ( !isset( $externalConcatBlobs[$cluster][$id] ) ) {
+ $externalConcatBlobs[$cluster][$id] = array();
+ }
+ $externalConcatBlobs[$cluster][$id] = array_merge(
+ $externalConcatBlobs[$cluster][$id], $concatBlobs[$row->old_id]
+ );
+ }
+ } else {
+ $this->error( 'unfixable', "Error: invalid flags \"{$row->old_flags}\" on concat bulk row {$row->old_id}",
+ $concatBlobs[$row->old_id] );
+ }
+ } elseif ( strcasecmp( substr( $row->header, 0, strlen( CONCAT_HEADER ) ), CONCAT_HEADER ) ) {
+ $this->error( 'restore text', "Error: Incorrect object header for concat bulk row {$row->old_id}",
+ $concatBlobs[$row->old_id] );
+ } # else good
+
+ unset( $concatBlobs[$row->old_id] );
+ }
+ $dbr->freeResult( $res );
+ }
+
+ // Check targets of unresolved stubs
+ $this->checkExternalConcatBlobs( $externalConcatBlobs );
+
+ // next chunk
+ }
+
+ print "\n\nErrors:\n";
+ foreach( $this->errors as $name => $errors ) {
+ if ( count( $errors ) ) {
+ $description = $this->errorDescriptions[$name];
+ echo "$description: " . implode( ',', array_keys( $errors ) ) . "\n";
+ }
+ }
+
+ if ( count( $this->errors['restore text'] ) && $fix ) {
+ if ( (string)$xml !== '' ) {
+ $this->restoreText( array_keys( $this->errors['restore text'] ), $xml );
+ } else {
+ echo "Can't fix text, no XML backup specified\n";
+ }
+ }
+
+ print "\nFlag statistics:\n";
+ $total = array_sum( $flagStats );
+ foreach ( $flagStats as $flag => $count ) {
+ printf( "%-30s %10d %5.2f%%\n", $flag, $count, $count / $total * 100 );
+ }
+ print "\nLocal object statistics:\n";
+ $total = array_sum( $objectStats );
+ foreach ( $objectStats as $className => $count ) {
+ printf( "%-30s %10d %5.2f%%\n", $className, $count, $count / $total * 100 );
+ }
+ }
+
+
+ function error( $type, $msg, $ids ) {
+ if ( is_array( $ids ) && count( $ids ) == 1 ) {
+ $ids = reset( $ids );
+ }
+ if ( is_array( $ids ) ) {
+ $revIds = array();
+ foreach ( $ids as $id ) {
+ $revIds = array_merge( $revIds, array_keys( $this->oldIdMap, $id ) );
+ }
+ print "$msg in text rows " . implode( ', ', $ids ) .
+ ", revisions " . implode( ', ', $revIds ) . "\n";
+ } else {
+ $id = $ids;
+ $revIds = array_keys( $this->oldIdMap, $id );
+ if ( count( $revIds ) == 1 ) {
+ print "$msg in old_id $id, rev_id {$revIds[0]}\n";
+ } else {
+ print "$msg in old_id $id, revisions " . implode( ', ', $revIds ) . "\n";
+ }
+ }
+ $this->errors[$type] = $this->errors[$type] + array_flip( $revIds );
+ }
+
+ function checkExternalConcatBlobs( $externalConcatBlobs ) {
+ $fname = 'CheckStorage::checkExternalConcatBlobs';
+ if ( !count( $externalConcatBlobs ) ) {
+ return;
+ }
+
+ if ( is_null( $this->dbStore ) ) {
+ $this->dbStore = new ExternalStoreDB;
+ }
+
+ foreach ( $externalConcatBlobs as $cluster => $oldIds ) {
+ $blobIds = array_keys( $oldIds );
+ $extDb =& $this->dbStore->getSlave( $cluster );
+ $blobsTable = $this->dbStore->getTable( $extDb );
+ $headerLength = strlen( CONCAT_HEADER );
+ $res = $extDb->select( $blobsTable,
+ array( 'blob_id', "LEFT(blob_text, $headerLength) AS header" ),
+ array( 'blob_id IN( ' . implode( ',', $blobIds ) . ')' ), $fname );
+ while ( $row = $extDb->fetchObject( $res ) ) {
+ if ( strcasecmp( $row->header, CONCAT_HEADER ) ) {
+ $this->error( 'restore text', "Error: invalid header on target $cluster/{$row->blob_id} of two-part ES URL",
+ $oldIds[$row->blob_id] );
+ }
+ unset( $oldIds[$row->blob_id] );
+
+ }
+ $extDb->freeResult( $res );
+
+ // Print errors for missing blobs rows
+ foreach ( $oldIds as $blobId => $oldIds ) {
+ $this->error( 'restore text', "Error: missing target $cluster/$blobId for two-part ES URL", $oldIds );
+ }
+ }
+ }
+
+ function restoreText( $revIds, $xml ) {
+ global $wgTmpDirectory, $wgDBname;
+
+ if ( !count( $revIds ) ) {
+ return;
+ }
+
+ print "Restoring text from XML backup...\n";
+
+ $revFileName = "$wgTmpDirectory/broken-revlist-$wgDBname";
+ $filteredXmlFileName = "$wgTmpDirectory/filtered-$wgDBname.xml";
+
+ // Write revision list
+ if ( !file_put_contents( $revFileName, implode( "\n", $revIds ) ) ) {
+ echo "Error writing revision list, can't restore text\n";
+ return;
+ }
+
+ // Run mwdumper
+ echo "Filtering XML dump...\n";
+ $exitStatus = 0;
+ passthru( 'mwdumper ' .
+ wfEscapeShellArg(
+ "--output=file:$filteredXmlFileName",
+ "--filter=revlist:$revFileName",
+ $xml
+ ), $exitStatus
+ );
+
+ if ( $exitStatus ) {
+ echo "mwdumper died with exit status $exitStatus\n";
+ return;
+ }
+
+ $file = fopen( $filteredXmlFileName, 'r' );
+ if ( !$file ) {
+ echo "Unable to open filtered XML file\n";
+ return;
+ }
+
+ $dbr =& wfGetDB( DB_SLAVE );
+ $dbw =& wfGetDB( DB_MASTER );
+ $dbr->ping();
+ $dbw->ping();
+
+ $source = new ImportStreamSource( $file );
+ $importer = new WikiImporter( $source );
+ $importer->setRevisionCallback( array( &$this, 'importRevision' ) );
+ $importer->doImport();
+ }
+
+ function importRevision( &$revision, &$importer ) {
+ $fname = 'CheckStorage::importRevision';
+
+ $id = $revision->getID();
+ $text = $revision->getText();
+ if ( $text === '' ) {
+ // This is what happens if the revision was broken at the time the
+ // dump was made. Unfortunately, it also happens if the revision was
+ // legitimately blank, so there's no way to tell the difference. To
+ // be safe, we'll skip it and leave it broken
+ $id = $id ? $id : '';
+ echo "Revision $id is blank in the dump, may have been broken before export\n";
+ return;
+ }
+
+ if ( !$id ) {
+ // No ID, can't import
+ echo "No id tag in revision, can't import\n";
+ return;
+ }
+
+ // Find text row again
+ $dbr =& wfGetDB( DB_SLAVE );
+ $oldId = $dbr->selectField( 'revision', 'rev_text_id', array( 'rev_id' => $id ), $fname );
+ if ( !$oldId ) {
+ echo "Missing revision row for rev_id $id\n";
+ return;
+ }
+
+ // Compress the text
+ $flags = Revision::compressRevisionText( $text );
+
+ // Update the text row
+ $dbw->update( 'text',
+ array( 'old_flags' => $flags, 'old_text' => $text ),
+ array( 'old_id' => $oldId ),
+ $fname, array( 'LIMIT' => 1 )
+ );
+
+ // Remove it from the unfixed list and add it to the fixed list
+ unset( $this->errors['restore text'][$id] );
+ $this->errors['fixed'][$id] = true;
+ }
+}
+?>
diff --git a/maintenance/storage/compressOld.inc b/maintenance/storage/compressOld.inc
new file mode 100644
index 00000000..b7d7094f
--- /dev/null
+++ b/maintenance/storage/compressOld.inc
@@ -0,0 +1,300 @@
+<?php
+/**
+ * @package MediaWiki
+ * @subpackage Maintenance
+ */
+
+/** */
+require_once( 'Revision.php' );
+require_once( 'ExternalStoreDB.php' );
+
+/** @todo document */
+function compressOldPages( $start = 0, $extdb = '' ) {
+ $fname = 'compressOldPages';
+
+ $chunksize = 50;
+ print "Starting from old_id $start...\n";
+ $dbw =& wfGetDB( DB_MASTER );
+ do {
+ $end = $start + $chunksize;
+ $res = $dbw->select( 'text', array( 'old_id','old_flags','old_namespace','old_title','old_text' ),
+ "old_id>=$start", $fname, array( 'ORDER BY' => 'old_id', 'LIMIT' => $chunksize, 'FOR UPDATE' ) );
+ if( $dbw->numRows( $res ) == 0 ) {
+ break;
+ }
+ $last = $start;
+ while( $row = $dbw->fetchObject( $res ) ) {
+ # print " {$row->old_id} - {$row->old_namespace}:{$row->old_title}\n";
+ compressPage( $row, $extdb );
+ $last = $row->old_id;
+ }
+ $dbw->freeResult( $res );
+ $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, 'LIMIT 1'
+ );
+ return true;
+}
+
+define( 'LS_INDIVIDUAL', 0 );
+define( 'LS_CHUNKED', 1 );
+
+/** @todo document */
+function compressWithConcat( $startId, $maxChunkSize, $maxChunkFactor, $factorThreshold, $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 LIKE '%object%' AND old_flags NOT LIKE '%external%'");
+
+ 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' );
+ $revLoadOptions = array();
+ }
+
+ # Don't work with current revisions
+ # Don't lock the page table for update either -- TS 2006-04-04
+ #$tables[] = 'page';
+ #$conds[] = 'page_id=rev_page AND rev_id != page_latest';
+
+ $oldReadsSinceLastSlaveWait = 0; #check slave lag periodically
+ $totalMatchingRevisions = 0;
+ $masterPos = false;
+ 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(
+ '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();
+ 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 ( $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 = $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
+ if ( $stubs[$j] !== false ) {
+ $dbw->update( 'text',
+ array( /* SET */
+ 'old_text' => serialize($stubs[$j]),
+ 'old_flags' => 'object,utf-8',
+ ), array( /* WHERE */
+ 'old_id' => $revs[$i + $j]->rev_text_id
+ )
+ );
+ }
+ }
+ }
+ }
+ # Done, next
+ print "/";
+ $dbw->commit();
+ $i += $thisChunkSize;
+ wfWaitForSlaves( 5 );
+ }
+ print "\n";
+ }
+ return true;
+}
+?>
diff --git a/maintenance/storage/compressOld.php b/maintenance/storage/compressOld.php
new file mode 100644
index 00000000..d597f1df
--- /dev/null
+++ b/maintenance/storage/compressOld.php
@@ -0,0 +1,82 @@
+<?php
+/**
+ * Compress the text of a wiki
+ *
+ * @package MediaWiki
+ * @subpackage Maintenance
+ */
+
+/** */
+
+/**
+ * Usage:
+ *
+ * Non-wikimedia
+ * php compressOld.php [options...]
+ *
+ * Wikimedia
+ * php compressOld.php <database> [options...]
+ *
+ * Options are:
+ * -t <type> set compression type to either:
+ * gzip: compress revisions independently
+ * concat: concatenate revisions and compress in chunks (default)
+ * -c <chunk-size> maximum number of revisions in a concat chunk
+ * -b <begin-date> earliest date to check for uncompressed revisions
+ * -e <end-date> latest revision date to compress
+ * -s <start-id> the old_id to start from
+ * -f <max-factor> the maximum ratio of compressed chunk bytes to uncompressed avg. revision bytes
+ * -h <threshold> is a minimum number of KB, where <max-factor> cuts in
+ * --extdb <cluster> store specified revisions in an external cluster (untested)
+ *
+ */
+
+$optionsWithArgs = array( 't', 'c', 's', 'f', 'h', 'extdb', 'endid' );
+require_once( "../commandLine.inc" );
+require_once( "compressOld.inc" );
+
+if( !function_exists( "gzdeflate" ) ) {
+ print "You must enable zlib support in PHP to compress old revisions!\n";
+ print "Please see http://www.php.net/manual/en/ref.zlib.php\n\n";
+ wfDie();
+}
+
+$defaults = array(
+ 't' => 'concat',
+ 'c' => 20,
+ 's' => 0,
+ 'f' => 5,
+ 'h' => 100,
+ 'b' => '',
+ 'e' => '',
+ 'extdb' => '',
+ 'endid' => false,
+);
+
+$options = $options + $defaults;
+
+if ( $options['t'] != 'concat' && $options['t'] != 'gzip' ) {
+ print "Type \"{$options['t']}\" not supported\n";
+}
+
+if ( $options['extdb'] != '' ) {
+ print "Compressing database $wgDBname to external cluster {$options['extdb']}\n" . str_repeat('-', 76) . "\n\n";
+} else {
+ print "Compressing database $wgDBname\n" . str_repeat('-', 76) . "\n\n";
+}
+
+$success = true;
+if ( $options['t'] == 'concat' ) {
+ $success = compressWithConcat( $options['s'], $options['c'], $options['f'], $options['h'], $options['b'],
+ $options['e'], $options['extdb'], $options['endid'] );
+} else {
+ compressOldPages( $options['s'], $options['extdb'] );
+}
+
+if ( $success ) {
+ print "Done.\n";
+}
+
+exit();
+
+?>
diff --git a/maintenance/storage/dumpRev.php b/maintenance/storage/dumpRev.php
new file mode 100644
index 00000000..4d0ccb58
--- /dev/null
+++ b/maintenance/storage/dumpRev.php
@@ -0,0 +1,14 @@
+<?php
+
+require_once( 'commandLine.inc' );
+$dbr =& wfGetDB( DB_SLAVE );
+$row = $dbr->selectRow( 'old', array( 'old_flags', 'old_text' ), array( 'old_id' => $args[0] ) );
+$obj = unserialize( $row->old_text );
+
+if ( get_class( $obj ) == 'concatenatedgziphistoryblob' ) {
+ print_r( array_keys( $obj->mItems ) );
+} else {
+ var_dump( $obj );
+}
+
+?>
diff --git a/maintenance/storage/make-blobs b/maintenance/storage/make-blobs
new file mode 100755
index 00000000..9eb7e83e
--- /dev/null
+++ b/maintenance/storage/make-blobs
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+if [ X$2 == X ];then
+ echo 'Usage: make-blobs <server> <db>'
+ exit 1
+fi
+
+echo "CREATE DATABASE $2" | mysql -u wikiadmin -p`wikiadmin_pass` -h $1 && \
+mysql -u wikiadmin -p`wikiadmin_pass` -h $1 $2 < blobs.sql
+
+
diff --git a/maintenance/storage/moveToExternal.php b/maintenance/storage/moveToExternal.php
new file mode 100644
index 00000000..0b46f70b
--- /dev/null
+++ b/maintenance/storage/moveToExternal.php
@@ -0,0 +1,97 @@
+<?php
+
+define( 'REPORTING_INTERVAL', 100 );
+
+if ( !defined( 'MEDIAWIKI' ) ) {
+ $optionsWithArgs = array( 'm' );
+
+ require_once( '../commandLine.inc' );
+ require_once( 'ExternalStoreDB.php' );
+ require_once( 'resolveStubs.php' );
+
+ $fname = 'moveToExternal';
+
+ if ( !isset( $args[0] ) ) {
+ print "Usage: php moveToExternal.php [-m <maxid>] <cluster>\n";
+ exit;
+ }
+
+ $cluster = $args[0];
+ $dbw =& wfGetDB( DB_MASTER );
+
+ if ( isset( $options['m'] ) ) {
+ $maxID = $options['m'];
+ } else {
+ $maxID = $dbw->selectField( 'text', 'MAX(old_id)', false, $fname );
+ }
+
+ moveToExternal( $cluster, $maxID );
+}
+
+
+
+function moveToExternal( $cluster, $maxID ) {
+ $fname = 'moveToExternal';
+ $dbw =& wfGetDB( DB_MASTER );
+
+ print "Moving $maxID text rows to external storage\n";
+ $ext = new ExternalStoreDB;
+ for ( $id = 1; $id <= $maxID; $id++ ) {
+ if ( !($id % REPORTING_INTERVAL) ) {
+ print "$id\n";
+ wfWaitForSlaves( 5 );
+ }
+ $row = $dbw->selectRow( 'text', array( 'old_flags', 'old_text' ),
+ array(
+ 'old_id' => $id,
+ "old_flags NOT LIKE '%external%'",
+ ), $fname );
+ if ( !$row ) {
+ # Non-existent or already done
+ continue;
+ }
+
+ # Resolve stubs
+ $text = $row->old_text;
+ if ( $row->old_flags === '' ) {
+ $flags = 'external';
+ } else {
+ $flags = "{$row->old_flags},external";
+ }
+
+ if ( strpos( $flags, 'object' ) !== false ) {
+ $obj = unserialize( $text );
+ $className = strtolower( get_class( $obj ) );
+ if ( $className == 'historyblobstub' ) {
+ resolveStub( $id, $row->old_text, $row->old_flags );
+ continue;
+ } elseif ( $className == 'historyblobcurstub' ) {
+ $text = gzdeflate( $obj->getText() );
+ $flags = 'utf-8,gzip,external';
+ } elseif ( $className == 'concatenatedgziphistoryblob' ) {
+ // Do nothing
+ } else {
+ print "Warning: unrecognised object class \"$className\"\n";
+ continue;
+ }
+ }
+
+ if ( strlen( $text ) < 100 ) {
+ // Don't move tiny revisions
+ continue;
+ }
+
+ #print "Storing " . strlen( $text ) . " bytes to $url\n";
+
+ $url = $ext->store( $cluster, $text );
+ if ( !$url ) {
+ print "Error writing to external storage\n";
+ exit;
+ }
+ $dbw->update( 'text',
+ array( 'old_flags' => $flags, 'old_text' => $url ),
+ array( 'old_id' => $id ), $fname );
+ }
+}
+
+?>
diff --git a/maintenance/storage/resolveStubs.php b/maintenance/storage/resolveStubs.php
new file mode 100644
index 00000000..e93d5c97
--- /dev/null
+++ b/maintenance/storage/resolveStubs.php
@@ -0,0 +1,100 @@
+<?php
+
+define( 'REPORTING_INTERVAL', 100 );
+
+if ( !defined( 'MEDIAWIKI' ) ) {
+ $optionsWithArgs = array( 'm' );
+
+ require_once( '../commandLine.inc' );
+ require_once( 'includes/ExternalStoreDB.php' );
+
+ resolveStubs();
+}
+
+/**
+ * Convert history stubs that point to an external row to direct
+ * external pointers
+ */
+function resolveStubs() {
+ $fname = 'resolveStubs';
+
+ $dbr =& wfGetDB( DB_SLAVE );
+ $dbw =& wfGetDB( DB_MASTER );
+ $maxID = $dbr->selectField( 'text', 'MAX(old_id)', false, $fname );
+ $blockSize = 10000;
+ $numBlocks = intval( $maxID / $blockSize ) + 1;
+
+ for ( $b = 0; $b < $numBlocks; $b++ ) {
+ wfWaitForSlaves( 5 );
+
+ printf( "%5.2f%%\n", $b / $numBlocks * 100 );
+ $start = intval($maxID / $numBlocks) * $b + 1;
+ $end = intval($maxID / $numBlocks) * ($b + 1);
+ $stubs = array();
+ $flagsArray = array();
+
+
+ $res = $dbr->select( 'text', array( 'old_id', 'old_text', 'old_flags' ),
+ "old_id>=$start AND old_id<=$end " .
+ # Using a more restrictive flag set for now, until I do some more analysis -- TS
+ #"AND old_flags LIKE '%object%' AND old_flags NOT LIKE '%external%' ".
+
+ "AND old_flags='object' " .
+ "AND old_text LIKE 'O:15:\"historyblobstub\"%'", $fname );
+ while ( $row = $dbr->fetchObject( $res ) ) {
+ resolveStub( $row->old_id, $row->old_text, $row->old_flags );
+ }
+ $dbr->freeResult( $res );
+
+
+ }
+ print "100%\n";
+}
+
+/**
+ * Resolve a history stub
+ */
+function resolveStub( $id, $stubText, $flags ) {
+ $fname = 'resolveStub';
+
+ $stub = unserialize( $stubText );
+ $flags = explode( ',', $flags );
+
+ $dbr =& wfGetDB( DB_SLAVE );
+ $dbw =& wfGetDB( DB_MASTER );
+
+ if ( strtolower( get_class( $stub ) ) !== 'historyblobstub' ) {
+ print "Error found object of class " . get_class( $stub ) . ", expecting historyblobstub\n";
+ return;
+ }
+
+ # Get the (maybe) external row
+ $externalRow = $dbr->selectRow( 'text', array( 'old_text' ),
+ array( 'old_id' => $stub->mOldId, "old_flags LIKE '%external%'" ),
+ $fname
+ );
+
+ if ( !$externalRow ) {
+ # Object wasn't external
+ return;
+ }
+
+ # Preserve the legacy encoding flag, but switch from object to external
+ if ( in_array( 'utf-8', $flags ) ) {
+ $newFlags = 'external,utf-8';
+ } else {
+ $newFlags = 'external';
+ }
+
+ # Update the row
+ $dbw->update( 'text',
+ array( /* SET */
+ 'old_flags' => $newFlags,
+ 'old_text' => $externalRow->old_text . '/' . $stub->mHash
+ ),
+ array( /* WHERE */
+ 'old_id' => $id
+ ), $fname
+ );
+}
+?>