org.reveno.atp.clustering.core

Class RevenoClusterConfiguration.RevenoSyncConfiguration

java.lang.Object

org.reveno.atp.clustering.core.RevenoClusterConfiguration.RevenoSyncConfiguration

All Implemented Interfaces:

ClusterConfiguration.SyncConfiguration

Enclosing class:

RevenoClusterConfiguration

public static class RevenoClusterConfiguration.RevenoSyncConfiguration
extends java.lang.Object
implements ClusterConfiguration.SyncConfiguration

Constructor Summary

Constructors

Constructor and Description
RevenoSyncConfiguration()

Method Summary

Modifier and Type	Method and Description
SyncMode	mode()
void	mode(SyncMode mode) A mode in which two nodes will perform synchronization during Leadership Election.
int	port()
void	port(int port) Port on which Sync Server will be listening.
int	retries()
void	retries(int count) Number of retries to transmit state data until it fails.
int	threadPoolSize()
void	threadPoolSize(int threads) Thread pool size of Sync Server, which handles synchronization requests and sends appropriate data.
boolean	waitAllNodesSync()
void	waitAllNodesSync(boolean wait) The synchronization process lasts during global Leadership Election process, which means no node during it can operate on production.

Methods inherited from class java.lang.Object

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

Constructor Detail

RevenoSyncConfiguration

public RevenoSyncConfiguration()

Method Detail

mode

public void mode(SyncMode mode)

Description copied from interface: ClusterConfiguration.SyncConfiguration

A mode in which two nodes will perform synchronization during Leadership Election. First option means that all nodes makes snapshots in advance and then just send it by request from other nodes. Second option is when the node sends required Journal files to other nodes, which contains events with transaction ID more or equals to current node last transaction ID. First option is prefered, but is not recommended for big models, because of size of snapshot and costs spent to make it for each Leadership Election process. Second option is generally not recommended if there is a big amount of Journal files or rolling is performed very rarely, means big files will be always transmitted. Default value is SyncMode.SNAPSHOT

Specified by:

mode in interface ClusterConfiguration.SyncConfiguration

mode

public SyncMode mode()

port

public void port(int port)

Description copied from interface: ClusterConfiguration.SyncConfiguration

Port on which Sync Server will be listening.

Specified by:

port in interface ClusterConfiguration.SyncConfiguration

port

public int port()

waitAllNodesSync

public void waitAllNodesSync(boolean wait)

Description copied from interface: ClusterConfiguration.SyncConfiguration

The synchronization process lasts during global Leadership Election process, which means no node during it can operate on production. Sometimes, it is obvious that Master candidate has the latest state, and can start to operate not awaiting other Slaves to catch up with its changes. In that case, if waitAllNodesSync is set to true, it will start to handle Commands normally during "sync" stage of Leadership Election process. Warning!!! You should consider using that flag *very* carefully, as it means that all failover data from Master will not be handled by Slaves as usual, but just buffered in memory, until they finish syncing. And if synchronization process takes too long, some data might be even lost. Use it primarily if you want Master to start operate as soon as possible (millisends matters) and you know that sync process either not happens at all or will be very short.

Specified by:

waitAllNodesSync in interface ClusterConfiguration.SyncConfiguration

waitAllNodesSync

public boolean waitAllNodesSync()

retries

public void retries(int count)

Description copied from interface: ClusterConfiguration.SyncConfiguration

Number of retries to transmit state data until it fails.

Specified by:

retries in interface ClusterConfiguration.SyncConfiguration

retries

public int retries()

threadPoolSize

public void threadPoolSize(int threads)

Description copied from interface: ClusterConfiguration.SyncConfiguration

Thread pool size of Sync Server, which handles synchronization requests and sends appropriate data.

Specified by:

threadPoolSize in interface ClusterConfiguration.SyncConfiguration

Parameters:

threads - to be used

threadPoolSize

public int threadPoolSize()