Package org.apache.accumulo.server

Class Accumulo

java.lang.Object

org.apache.accumulo.server.Accumulo

public class Accumulo
extends Object

Constructor Summary

Constructors

Constructor	Description
Accumulo()

Method Summary

Modifier and Type	Method	Description
static void	abortIfFateTransactions()	Exit loudly if there are outstanding Fate operations.
static boolean	canUpgradeFromDataVersion(int dataVersion)	Sanity check that the current persistent version is allowed to upgrade to the version of Accumulo running.
static org.apache.hadoop.fs.Path	getAccumuloInstanceIdPath(VolumeManager fs)
static int	getAccumuloPersistentVersion(Volume v)
static int	getAccumuloPersistentVersion(VolumeManager fs)
static int	getAccumuloPersistentVersion(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.fs.Path path)
static void	init(VolumeManager fs, ServerConfigurationFactory serverConfig, String application)
static void	monitorSwappiness(AccumuloConfiguration config)
static boolean	persistentVersionNeedsUpgrade(int accumuloPersistentVersion)	Does the data version number stored in the backing Volumes indicate we need to upgrade something?
static void	setupLogging(String application)
static void	updateAccumuloVersion(VolumeManager fs, int oldVersion)
static void	waitForZookeeperAndHdfs(VolumeManager fs)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Accumulo

public Accumulo()

Method Detail

updateAccumuloVersion

public static void updateAccumuloVersion(VolumeManager fs,
                                         int oldVersion)

getAccumuloPersistentVersion

public static int getAccumuloPersistentVersion(org.apache.hadoop.fs.FileSystem fs,
                                               org.apache.hadoop.fs.Path path)

getAccumuloPersistentVersion

public static int getAccumuloPersistentVersion(Volume v)

getAccumuloPersistentVersion

public static int getAccumuloPersistentVersion(VolumeManager fs)

getAccumuloInstanceIdPath

public static org.apache.hadoop.fs.Path getAccumuloInstanceIdPath(VolumeManager fs)

setupLogging

public static void setupLogging(String application)
                         throws UnknownHostException

Throws:

UnknownHostException

init

public static void init(VolumeManager fs,
                        ServerConfigurationFactory serverConfig,
                        String application)
                 throws IOException

Throws:

IOException

canUpgradeFromDataVersion

public static boolean canUpgradeFromDataVersion(int dataVersion)

Sanity check that the current persistent version is allowed to upgrade to the version of Accumulo running.

Parameters:

dataVersion - the version that is persisted in the backing Volumes

persistentVersionNeedsUpgrade

public static boolean persistentVersionNeedsUpgrade(int accumuloPersistentVersion)

Does the data version number stored in the backing Volumes indicate we need to upgrade something?

monitorSwappiness

public static void monitorSwappiness(AccumuloConfiguration config)

waitForZookeeperAndHdfs

public static void waitForZookeeperAndHdfs(VolumeManager fs)

abortIfFateTransactions

public static void abortIfFateTransactions()

Exit loudly if there are outstanding Fate operations. Since Fate serializes class names, we need to make sure there are no queued transactions from a previous version before continuing an upgrade. The status of the operations is irrelevant; those in SUCCESSFUL status cause the same problem as those just queued. Note that the Master should not allow write access to Fate until after all upgrade steps are complete. Should be called as a guard before performing any upgrade steps, after determining that an upgrade is needed. see ACCUMULO-2519