<?php
+/**
+ * Moves blobs indexed by trackBlobs.php to a specified list of destination
+ * clusters, and recompresses them in the process.
+ *
+ * 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 ExternalStorage
+ */
$optionsWithArgs = RecompressTracked::getOptionsWithArgs();
-require( dirname( __FILE__ ) . '/../commandLine.inc' );
+require( __DIR__ . '/../commandLine.inc' );
if ( count( $args ) < 1 ) {
echo "Usage: php recompressTracked.php [options] <cluster> [... <cluster>...]
Moves blobs indexed by trackBlobs.php to a specified list of destination clusters, and recompresses them in the process. Restartable.
-Options:
- --procs <procs> Set the number of child processes (default 1)
+Options:
+
--procs <procs> Set the number of child processes (default 1)
--copy-only Copy only, do not update the text table. Restart without this option to complete.
--debug-log <file> Log debugging data to the specified file
--info-log <file> Log progress messages to the specified file
$job = RecompressTracked::newFromCommandLine( $args, $options );
$job->execute();
+/**
+ * Maintenance script that moves blobs indexed by trackBlobs.php to a specified
+ * list of destination clusters, and recompresses them in the process.
+ *
+ * @ingroup Maintenance ExternalStorage
+ */
class RecompressTracked {
var $destClusters;
var $batchSize = 1000;
/**
* Wait until the selected slave has caught up to the master.
- * This allows us to use the slave for things that were committed in a
- * previous part of this batch process.
+ * This allows us to use the slave for things that were committed in a
+ * previous part of this batch process.
*/
function syncDBs() {
$dbw = wfGetDB( DB_MASTER );
/**
* Make sure the tracking table exists and isn't empty
+ * @return bool
*/
function checkTrackingTable() {
$dbr = wfGetDB( DB_SLAVE );
*
* This is done in a single transaction to provide restartable behaviour
* without data loss.
- *
+ *
* The transaction is kept short to reduce locking.
*/
function moveTextRow( $textId, $url ) {
exit( 1 );
}
$dbw = wfGetDB( DB_MASTER );
- $dbw->begin();
+ $dbw->begin( __METHOD__ );
$dbw->update( 'text',
array( // set
'old_text' => $url,
array( 'bt_text_id' => $textId ),
__METHOD__
);
- $dbw->commit();
+ $dbw->commit( __METHOD__ );
}
/**
/**
* Returns the name of the next target cluster
+ * @return string
*/
function getTargetCluster() {
$cluster = next( $this->destClusters );
/**
* Gets a DB master connection for the given external cluster name
+ * @param $cluster string
+ * @return DatabaseBase
*/
function getExtDB( $cluster ) {
$lb = wfGetLBFactory()->getExternalLB( $cluster );
$this->finishIncompleteMoves( array( 'bt_text_id' => $textIds ) );
$this->syncDBs();
}
-
+
$trx = new CgzCopyTransaction( $this, $this->orphanBlobClass );
$res = wfGetDB( DB_SLAVE )->select(
foreach ( $res as $row ) {
$text = Revision::getRevisionText( $row );
if ( $text === false ) {
- $this->critical( "Error: cannot load revision text for old_id=$textId" );
+ $this->critical( "Error: cannot load revision text for old_id={$row->old_id}" );
continue;
}
-
+
if ( !$trx->addItem( $text, $row->old_id ) ) {
$this->debug( "[orphan]: committing blob with " . $trx->getSize() . " rows" );
$trx->commit();
$trx->commit();
}
- /**
+ /**
* Wait for slaves (quietly)
*/
function waitForSlaves() {
/**
* Add text.
* Returns false if it's ready to commit.
+ * @param $text string
+ * @param $textId
+ * @return bool
*/
function addItem( $text, $textId ) {
if ( !$this->cgz ) {
// Check to see if the target text_ids have been moved already.
//
- // We originally read from the slave, so this can happen when a single
- // text_id is shared between multiple pages. It's rare, but possible
+ // We originally read from the slave, so this can happen when a single
+ // text_id is shared between multiple pages. It's rare, but possible
// if a delete/move/undelete cycle splits up a null edit.
//
// We do a locking read to prevent closer-run race conditions.
$dbw = wfGetDB( DB_MASTER );
- $dbw->begin();
+ $dbw->begin( __METHOD__ );
$res = $dbw->select( 'blob_tracking',
array( 'bt_text_id', 'bt_moved' ),
array( 'bt_text_id' => array_keys( $this->referrers ) ),
$store = $this->parent->store;
$targetDB = $store->getMaster( $targetCluster );
$targetDB->clearFlag( DBO_TRX ); // we manage the transactions
- $targetDB->begin();
+ $targetDB->begin( __METHOD__ );
$baseUrl = $this->parent->store->store( $targetCluster, serialize( $this->cgz ) );
// Write the new URLs to the blob_tracking table
);
}
- $targetDB->commit();
+ $targetDB->commit( __METHOD__ );
// Critical section here: interruption at this point causes blob duplication
// Reversing the order of the commits would cause data loss instead
- $dbw->commit();
+ $dbw->commit( __METHOD__ );
// Write the new URLs to the text table and set the moved flag
if ( !$this->parent->copyOnly ) {
dépôts / lhc / web / wiklou.git / blobdiff