Package org.apache.hadoop.hdfs.server.federation.store

Class MountTableStore

java.lang.Object

org.apache.hadoop.hdfs.server.federation.store.RecordStore<R>

org.apache.hadoop.hdfs.server.federation.store.CachedRecordStore<MountTable>

org.apache.hadoop.hdfs.server.federation.store.MountTableStore

All Implemented Interfaces:

MountTableManager, StateStoreCache

Direct Known Subclasses:

MountTableStoreImpl

@Private
@Evolving
public abstract class MountTableStore
extends CachedRecordStore<MountTable>
implements MountTableManager

Management API for the HDFS mount table information stored in MountTable records. The mount table contains entries that map a particular global namespace path one or more HDFS nameservices (NN) + target path. It is possible to map mount locations for root folders, directories or individual files.

Once fetched from the StateStoreDriver, MountTable records are cached in a tree for faster access. Each path in the global namespace is mapped to a nameserivce ID and local path upon request. The cache is periodically updated by the @{link StateStoreCacheUpdateService}.

Constructor Summary

Constructors

Constructor	Description
MountTableStore(StateStoreDriver driver)

Method Summary

Modifier and Type	Method	Description
RouterQuotaManager	getQuotaManager()
void	setQuotaManager(RouterQuotaManager quotaManager)
void	setRefreshService(MountTableRefresherService refreshService)
protected void	updateCacheAllRouters()	Update mount table cache of this router as well as all other routers.

Methods inherited from class org.apache.hadoop.hdfs.server.federation.store.CachedRecordStore

getCachedRecords, getCachedRecordsAndTimeStamp, loadCache, overrideExpiredRecord, overrideExpiredRecords

Methods inherited from class org.apache.hadoop.hdfs.server.federation.store.RecordStore

getDriver, getRecordClass, newInstance

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hdfs.server.federation.resolver.MountTableManager

addMountTableEntries, addMountTableEntry, getDestination, getMountTableEntries, refreshMountTableEntries, removeMountTableEntry, updateMountTableEntry

Constructor Details

MountTableStore

public MountTableStore(StateStoreDriver driver)

Method Details

setRefreshService

public void setRefreshService(MountTableRefresherService refreshService)

setQuotaManager

public void setQuotaManager(RouterQuotaManager quotaManager)

getQuotaManager

public RouterQuotaManager getQuotaManager()

updateCacheAllRouters

protected void updateCacheAllRouters()

Update mount table cache of this router as well as all other routers.