/** @var bool|DBMasterPos False if not set */
private $mWaitForPos;
/** @var bool Whether the generic reader fell back to a lagged replica DB */
- private $laggedSlaveMode = false;
+ private $laggedReplicaMode = false;
/** @var bool Whether the generic reader fell back to a lagged replica DB */
- private $slavesDownMode = false;
+ private $allReplicasDownMode = false;
/** @var string The last DB selection or connection error */
private $mLastError = 'Unknown error';
/** @var string|bool Reason the LB is read-only or false if not */
# Scale the configured load ratios according to the dynamic load (if the load monitor supports it)
$this->getLoadMonitor()->scaleLoads( $nonErrorLoads, $group, $wiki );
- $laggedSlaveMode = false;
+ $laggedReplicaMode = false;
# No server found yet
$i = false;
- $conn = false;
# First try quickly looking through the available servers for a server that
# meets our criteria
$currentLoads = $nonErrorLoads;
while ( count( $currentLoads ) ) {
- if ( $this->mAllowLagged || $laggedSlaveMode ) {
+ if ( $this->mAllowLagged || $laggedReplicaMode ) {
$i = ArrayUtils::pickRandom( $currentLoads );
} else {
$i = false;
# All replica DBs lagged. Switch to read-only mode
wfDebugLog( 'replication', "All replica DBs lagged. Switch to read-only mode" );
$i = ArrayUtils::pickRandom( $currentLoads );
- $laggedSlaveMode = true;
+ $laggedReplicaMode = true;
}
}
}
if ( $i !== false ) {
- # replica DB connection successful
- # Wait for the session master pos for a short time
+ # Replica DB connection successful.
+ # Wait for the session master pos for a short time.
if ( $this->mWaitForPos && $i > 0 ) {
- if ( !$this->doWait( $i ) ) {
- $this->mServers[$i]['slave pos'] = $conn->getSlavePos();
- }
+ $this->doWait( $i );
}
if ( $this->mReadIndex <= 0 && $this->mLoads[$i] > 0 && $group === false ) {
$this->mReadIndex = $i;
# Record if the generic reader index is in "lagged replica DB" mode
- if ( $laggedSlaveMode ) {
- $this->laggedSlaveMode = true;
+ if ( $laggedReplicaMode ) {
+ $this->laggedReplicaMode = true;
}
}
$serverName = $this->getServerName( $i );
/**
* Set the master wait position
- * If a DB_SLAVE connection has been opened already, waits
+ * If a DB_REPLICA connection has been opened already, waits
* Otherwise sets a variable telling it to wait if such a connection is opened
* @param DBMasterPos $pos
*/
if ( $i > 0 ) {
if ( !$this->doWait( $i ) ) {
- $this->mServers[$i]['slave pos'] = $this->getAnyOpenConnection( $i )->getSlavePos();
- $this->laggedSlaveMode = true;
+ $this->laggedReplicaMode = true;
}
}
}
}
# Operation-based index
- if ( $i == DB_SLAVE ) {
+ if ( $i == DB_REPLICA ) {
$this->mLastError = 'Unknown error'; // reset error string
# Try the general server pool if $groups are unavailable.
$i = in_array( false, $groups, true )
/**
* This can happen in code like:
* foreach ( $dbs as $db ) {
- * $conn = $lb->getConnection( DB_SLAVE, [], $db );
+ * $conn = $lb->getConnection( DB_REPLICA, [], $db );
* ...
* $lb->reuseConnection( $conn );
* }
/**
* @note This method will trigger a DB connection if not yet done
- *
* @param string|bool $wiki Wiki ID, or false for the current wiki
* @return bool Whether the generic connection for reads is highly "lagged"
*/
- public function getLaggedSlaveMode( $wiki = false ) {
+ public function getLaggedReplicaMode( $wiki = false ) {
// No-op if there is only one DB (also avoids recursion)
- if ( !$this->laggedSlaveMode && $this->getServerCount() > 1 ) {
+ if ( !$this->laggedReplicaMode && $this->getServerCount() > 1 ) {
try {
- // See if laggedSlaveMode gets set
- $conn = $this->getConnection( DB_SLAVE, false, $wiki );
+ // See if laggedReplicaMode gets set
+ $conn = $this->getConnection( DB_REPLICA, false, $wiki );
$this->reuseConnection( $conn );
} catch ( DBConnectionError $e ) {
// Avoid expensive re-connect attempts and failures
- $this->slavesDownMode = true;
- $this->laggedSlaveMode = true;
+ $this->allReplicasDownMode = true;
+ $this->laggedReplicaMode = true;
}
}
- return $this->laggedSlaveMode;
+ return $this->laggedReplicaMode;
+ }
+
+ /**
+ * @param bool $wiki
+ * @return bool
+ * @deprecated 1.28; use getLaggedReplicaMode()
+ */
+ public function getLaggedSlaveMode( $wiki = false ) {
+ return $this->getLaggedReplicaMode( $wiki );
}
/**
* @note This method will never cause a new DB connection
* @return bool Whether any generic connection used for reads was highly "lagged"
+ * @since 1.28
+ */
+ public function laggedReplicaUsed() {
+ return $this->laggedReplicaMode;
+ }
+
+ /**
+ * @return bool
* @since 1.27
+ * @deprecated Since 1.28; use laggedReplicaUsed()
*/
public function laggedSlaveUsed() {
- return $this->laggedSlaveMode;
+ return $this->laggedReplicaUsed();
}
/**
public function getReadOnlyReason( $wiki = false, DatabaseBase $conn = null ) {
if ( $this->readOnlyReason !== false ) {
return $this->readOnlyReason;
- } elseif ( $this->getLaggedSlaveMode( $wiki ) ) {
- if ( $this->slavesDownMode ) {
+ } elseif ( $this->getLaggedReplicaMode( $wiki ) ) {
+ if ( $this->allReplicasDownMode ) {
return 'The database has been automatically locked ' .
'until the replica database servers become available';
} else {
* @since 1.27
*/
public function safeWaitForMasterPos( IDatabase $conn, $pos = false, $timeout = 10 ) {
- if ( $this->getServerCount() == 1 || !$conn->getLBInfo( 'slave' ) ) {
+ if ( $this->getServerCount() == 1 || !$conn->getLBInfo( 'replica' ) ) {
return true; // server is not a replica DB
}
dépôts / lhc / web / wiklou.git / blobdiff