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| <!-- Do not modify this file directly. Instead, copy entries that you --> |
| <!-- wish to modify from this file into hdfs-rbf-site.xml and change them --> |
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| |
| <configuration> |
| <property> |
| <name>dfs.federation.router.default.nameserviceId</name> |
| <value></value> |
| <description> |
| Nameservice identifier of the default subcluster to monitor. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.default.nameservice.enable</name> |
| <value>true</value> |
| <description> |
| The default subcluster is enabled to read and write files. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.rpc.enable</name> |
| <value>true</value> |
| <description> |
| If true, the RPC service to handle client requests in the router is |
| enabled. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.rpc-address</name> |
| <value>0.0.0.0:8888</value> |
| <description> |
| RPC address that handles all clients requests. |
| The value of this property will take the form of router-host1:rpc-port. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.rpc-bind-host</name> |
| <value></value> |
| <description> |
| The actual address the RPC server will bind to. If this optional address is |
| set, it overrides only the hostname portion of |
| dfs.federation.router.rpc-address. This is useful for making the name node |
| listen on all interfaces by setting it to 0.0.0.0. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.handler.count</name> |
| <value>10</value> |
| <description> |
| The number of server threads for the router to handle RPC requests from |
| clients. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.handler.queue.size</name> |
| <value>100</value> |
| <description> |
| The size of the queue for the number of handlers to handle RPC client requests. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.reader.count</name> |
| <value>1</value> |
| <description> |
| The number of readers for the router to handle RPC client requests. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.reader.queue.size</name> |
| <value>100</value> |
| <description> |
| The size of the queue for the number of readers for the router to handle RPC client requests. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.connection.creator.queue-size</name> |
| <value>100</value> |
| <description> |
| Size of async connection creator queue. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.connection.pool-size</name> |
| <value>1</value> |
| <description> |
| Size of the pool of connections from the router to namenodes. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.connection.min-active-ratio</name> |
| <value>0.5f</value> |
| <description> |
| Minimum active ratio of connections from the router to namenodes. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.connection.clean.ms</name> |
| <value>10000</value> |
| <description> |
| Time interval, in milliseconds, to check if the connection pool should |
| remove unused connections. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.enable.multiple.socket</name> |
| <value>false</value> |
| <description> |
| If enable multiple downstream socket or not. If true, ConnectionPool |
| will use a new socket when creating a new connection for the same user, |
| and RouterRPCClient will get a better throughput. It's best used with |
| dfs.federation.router.max.concurrency.per.connection together to get |
| a better throughput with fewer sockets. Such as enable |
| dfs.federation.router.enable.multiple.socket and |
| set dfs.federation.router.max.concurrency.per.connection = 20. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.max.concurrency.per.connection</name> |
| <value>1</value> |
| <description> |
| The maximum number of requests that a connection can handle concurrently. |
| When the number of requests being processed by a socket is less than this value, |
| new request will be processed by this socket. When enable |
| dfs.federation.router.enable.multiple.socket, it's best |
| set this value greater than 1, such as 20, to avoid frequent |
| creation and idle sockets in the case of a NS with jitter requests. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.connection.pool.clean.ms</name> |
| <value>60000</value> |
| <description> |
| Time interval, in milliseconds, to check if the connection manager should |
| remove unused connection pools. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.metrics.enable</name> |
| <value>true</value> |
| <description> |
| If the metrics in the router are enabled. |
| </description> |
| </property> |
| |
| |
| <property> |
| <name>dfs.federation.router.dn-report.time-out</name> |
| <value>1000</value> |
| <description> |
| Time out, in milliseconds for getDatanodeReport. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.dn-report.cache-expire</name> |
| <value>10s</value> |
| <description> |
| Expiration time in seconds for datanodereport. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.metrics.class</name> |
| <value>org.apache.hadoop.hdfs.server.federation.metrics.FederationRPCPerformanceMonitor</value> |
| <description> |
| Class to monitor the RPC system in the router. It must implement the |
| RouterRpcMonitor interface. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.admin.enable</name> |
| <value>true</value> |
| <description> |
| If true, the RPC admin service to handle client requests in the router is |
| enabled. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.admin-address</name> |
| <value>0.0.0.0:8111</value> |
| <description> |
| RPC address that handles the admin requests. |
| The value of this property will take the form of router-host1:rpc-port. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.admin-bind-host</name> |
| <value></value> |
| <description> |
| The actual address the RPC admin server will bind to. If this optional |
| address is set, it overrides only the hostname portion of |
| dfs.federation.router.admin-address. This is useful for making the name |
| node listen on all interfaces by setting it to 0.0.0.0. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.admin.handler.count</name> |
| <value>1</value> |
| <description> |
| The number of server threads for the router to handle RPC requests from |
| admin. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.admin.mount.check.enable</name> |
| <value>false</value> |
| <description> |
| If true, add/update mount table will include a destination check to make |
| sure the file exists in downstream namenodes, and changes to mount table |
| will fail if the file doesn't exist in any of the destination namenode. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.http-address</name> |
| <value>0.0.0.0:50071</value> |
| <description> |
| HTTP address that handles the web requests to the Router. |
| The value of this property will take the form of router-host1:http-port. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.http-bind-host</name> |
| <value></value> |
| <description> |
| The actual address the HTTP server will bind to. If this optional |
| address is set, it overrides only the hostname portion of |
| dfs.federation.router.http-address. This is useful for making the name |
| node listen on all interfaces by setting it to 0.0.0.0. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.https-address</name> |
| <value>0.0.0.0:50072</value> |
| <description> |
| HTTPS address that handles the web requests to the Router. |
| The value of this property will take the form of router-host1:https-port. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.https-bind-host</name> |
| <value></value> |
| <description> |
| The actual address the HTTPS server will bind to. If this optional |
| address is set, it overrides only the hostname portion of |
| dfs.federation.router.https-address. This is useful for making the name |
| node listen on all interfaces by setting it to 0.0.0.0. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.http.enable</name> |
| <value>true</value> |
| <description> |
| If the HTTP service to handle client requests in the router is enabled. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.fs-limits.max-component-length</name> |
| <value>0</value> |
| <description> |
| Defines the maximum number of bytes in UTF-8 encoding in each |
| component of a path at Router side. A value of 0 will disable the check. |
| Support multiple size unit suffix(case insensitive). It is act as |
| configuration dfs.namenode.fs-limits.max-component-length at NameNode |
| side. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.file.resolver.client.class</name> |
| <value>org.apache.hadoop.hdfs.server.federation.resolver.MountTableResolver</value> |
| <description> |
| Class to resolve files to subclusters. To enable multiple subclusters for a mount point, |
| set to org.apache.hadoop.hdfs.server.federation.resolver.MultipleDestinationMountTableResolver. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.namenode.resolver.client.class</name> |
| <value>org.apache.hadoop.hdfs.server.federation.resolver.MembershipNamenodeResolver</value> |
| <description> |
| Class to resolve the namenode for a subcluster. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.store.enable</name> |
| <value>true</value> |
| <description> |
| If true, the Router connects to the State Store. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.store.serializer</name> |
| <value>org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreSerializerPBImpl</value> |
| <description> |
| Class to serialize State Store records. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.store.driver.class</name> |
| <value>org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreZooKeeperImpl</value> |
| <description> |
| Class to implement the State Store. There are three implementation classes currently |
| being supported: |
| org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreFileImpl, |
| org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreFileSystemImpl and |
| org.apache.hadoop.hdfs.server.federation.store.driver.impl.StateStoreZooKeeperImpl. |
| These implementation classes use the local file, filesystem and ZooKeeper as a backend respectively. |
| By default it uses the ZooKeeper as the default State Store. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.store.connection.test</name> |
| <value>60000</value> |
| <description> |
| How often to check for the connection to the State Store in milliseconds. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.cache.ttl</name> |
| <value>1m</value> |
| <description> |
| How often to refresh the State Store caches in milliseconds. This setting |
| supports multiple time unit suffixes as described in |
| dfs.heartbeat.interval. If no suffix is specified then milliseconds is |
| assumed. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.store.membership.expiration</name> |
| <value>300000</value> |
| <description> |
| Expiration time in milliseconds for a membership record. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.store.membership.expiration.deletion</name> |
| <value>-1</value> |
| <description> |
| Deletion time in milliseconds for a membership record. If an expired |
| membership record exists beyond this time, it will be deleted. If this |
| value is negative, the deletion is disabled. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.heartbeat.enable</name> |
| <value>true</value> |
| <description> |
| If true, the Router heartbeats into the State Store. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.heartbeat.interval</name> |
| <value>5000</value> |
| <description> |
| How often the Router should heartbeat into the State Store in milliseconds. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.heartbeat-state.interval</name> |
| <value>5s</value> |
| <description> |
| How often the Router should heartbeat its state into the State Store in |
| milliseconds. This setting supports multiple time unit suffixes as |
| described in dfs.federation.router.quota-cache.update.interval. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.namenode.heartbeat.enable</name> |
| <value></value> |
| <description> |
| If true, get namenode heartbeats and send into the State Store. |
| If not explicitly specified takes the same value as for |
| dfs.federation.router.heartbeat.enable. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.store.router.expiration</name> |
| <value>5m</value> |
| <description> |
| Expiration time in milliseconds for a router state record. This setting |
| supports multiple time unit suffixes as described in |
| dfs.federation.router.quota-cache.update.interval. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.store.router.expiration.deletion</name> |
| <value>-1</value> |
| <description> |
| Deletion time in milliseconds for a router state record. If an expired |
| router state record exists beyond this time, it will be deleted. If this |
| value is negative, the deletion is disabled. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.safemode.enable</name> |
| <value>true</value> |
| <description> |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.safemode.extension</name> |
| <value>30s</value> |
| <description> |
| Time after startup that the Router is in safe mode. This setting |
| supports multiple time unit suffixes as described in |
| dfs.heartbeat.interval. If no suffix is specified then milliseconds is |
| assumed. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.safemode.expiration</name> |
| <value>3m</value> |
| <description> |
| Time without being able to reach the State Store to enter safe mode. This |
| setting supports multiple time unit suffixes as described in |
| dfs.heartbeat.interval. If no suffix is specified then milliseconds is |
| assumed. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.monitor.namenode</name> |
| <value></value> |
| <description> |
| The identifier of the namenodes to monitor and heartbeat. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.monitor.namenode.nameservice.resolution-enabled</name> |
| <value>false</value> |
| <description> |
| Determines if the given monitored namenode address is a domain name which needs to |
| be resolved. |
| This is used by router to resolve namenodes. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.monitor.namenode.nameservice.resolver.impl</name> |
| <value></value> |
| <description> |
| Nameservice resolver implementation used by router. |
| Effective with |
| dfs.federation.router.monitor.namenode.nameservices.resolution-enabled on. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.monitor.localnamenode.enable</name> |
| <value>true</value> |
| <description> |
| If true, the Router should monitor the namenode in the local machine. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.mount-table.max-cache-size</name> |
| <value>10000</value> |
| <description> |
| Maximum number of mount table cache entries to have. |
| By default, remove cache entries if we have more than 10k. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.mount-table.cache.enable</name> |
| <value>true</value> |
| <description> |
| Set to true to enable mount table cache (Path to Remote Location cache). |
| Disabling the cache is recommended when a large amount of unique paths are queried. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.quota.enable</name> |
| <value>false</value> |
| <description> |
| Set to true to enable quota system in Router. When it's enabled, setting |
| or clearing sub-cluster's quota directly is not recommended since Router |
| Admin server will override sub-cluster's quota with global quota. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.quota-cache.update.interval</name> |
| <value>60s</value> |
| <description> |
| Interval time for updating quota usage cache in Router. |
| This property is used only if the value of |
| dfs.federation.router.quota.enable is true. |
| This setting supports multiple time unit suffixes as described |
| in dfs.heartbeat.interval. If no suffix is specified then milliseconds |
| is assumed. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.client.thread-size</name> |
| <value>32</value> |
| <description> |
| Max threads size for the RouterClient to execute concurrent |
| requests. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.client.retry.max.attempts</name> |
| <value>3</value> |
| <description> |
| Max retry attempts for the RouterClient talking to the Router. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.client.reject.overload</name> |
| <value>false</value> |
| <description> |
| Set to true to reject client requests when we run out of RPC client |
| threads. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.client.allow-partial-listing</name> |
| <value>true</value> |
| <description> |
| If the Router can return a partial list of files in a multi-destination mount point when one of the subclusters is unavailable. |
| True may return a partial list of files if a subcluster is down. |
| False will fail the request if one is unavailable. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.client.mount-status.time-out</name> |
| <value>1s</value> |
| <description> |
| Set a timeout for the Router when listing folders containing mount |
| points. In this process, the Router checks the mount table and then it |
| checks permissions in the subcluster. After the time out, we return the |
| default values. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.connect.max.retries.on.timeouts</name> |
| <value>0</value> |
| <description> |
| Maximum number of retries for the IPC Client when connecting to the |
| subclusters. By default, it doesn't let the IPC retry and the Router |
| handles it. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.connect.timeout</name> |
| <value>2s</value> |
| <description> |
| Time out for the IPC client connecting to the subclusters. This should be |
| short as the Router has knowledge of the state of the Routers. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.keytab.file</name> |
| <value></value> |
| <description> |
| The keytab file used by router to login as its |
| service principal. The principal name is configured with |
| dfs.federation.router.kerberos.principal. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.kerberos.principal</name> |
| <value></value> |
| <description> |
| The Router service principal. This is typically set to |
| router/_HOST@REALM.TLD. Each Router will substitute _HOST with its |
| own fully qualified hostname at startup. The _HOST placeholder |
| allows using the same configuration setting on both Router |
| in an HA setup. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.kerberos.principal.hostname</name> |
| <value></value> |
| <description> |
| Optional. The hostname for the Router containing this |
| configuration file. Will be different for each machine. |
| Defaults to current hostname. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.kerberos.internal.spnego.principal</name> |
| <value>${dfs.web.authentication.kerberos.principal}</value> |
| <description> |
| The server principal used by the Router for web UI SPNEGO |
| authentication when Kerberos security is enabled. This is |
| typically set to HTTP/_HOST@REALM.TLD The SPNEGO server principal |
| begins with the prefix HTTP/ by convention. |
| |
| If the value is '*', the web server will attempt to login with |
| every principal specified in the keytab file |
| dfs.web.authentication.kerberos.keytab. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.mount-table.cache.update</name> |
| <value>false</value> |
| <description>Set true to enable MountTableRefreshService. This service |
| updates mount table cache immediately after adding, modifying or |
| deleting the mount table entries. If this service is not enabled |
| mount table cache are refreshed periodically by |
| StateStoreCacheUpdateService |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.mount-table.cache.update.timeout</name> |
| <value>1m</value> |
| <description>This property defines how long to wait for all the |
| admin servers to finish their mount table cache update. This setting |
| supports multiple time unit suffixes as described in |
| dfs.federation.router.safemode.extension. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.mount-table.cache.update.client.max.time |
| </name> |
| <value>5m</value> |
| <description>Remote router mount table cache is updated through |
| RouterClient(RPC call). To improve performance, RouterClient |
| connections are cached but it should not be kept in cache forever. |
| This property defines the max time a connection can be cached. This |
| setting supports multiple time unit suffixes as described in |
| dfs.federation.router.safemode.extension. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.secret.manager.class</name> |
| <value>org.apache.hadoop.hdfs.server.federation.router.security.token.ZKDelegationTokenSecretManagerImpl</value> |
| <description> |
| Class to implement state store to delegation tokens. |
| Default implementation uses zookeeper as the backend to store delegation tokens. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.top.num.token.realowners</name> |
| <value>10</value> |
| <description> |
| The number of top real owners by tokens count to report in the JMX metrics. |
| Real owners are the effective users whose cretential are used to generate |
| the tokens. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.fairness.policy.controller.class</name> |
| <value>org.apache.hadoop.hdfs.server.federation.fairness.NoRouterRpcFairnessPolicyController</value> |
| <description> |
| No fairness policy handler by default, for fairness |
| StaticFairnessPolicyController should be configured. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.fairness.handler.count.EXAMPLENAMESERVICE</name> |
| <value></value> |
| <description> |
| Dedicated handler count for nameservice EXAMPLENAMESERVICE. The handler |
| (configed by dfs.federation.router.handler.count)resource is controlled |
| internally by Semaphore permits. Two requirements have to be satisfied. |
| 1) all downstream nameservices need this config otherwise no permit will |
| be given thus not proxy will happen. 2) if a special *concurrent* |
| nameservice is specified, the sum of all configured values is smaller or |
| equal to the total number of router handlers; if the special *concurrent* |
| is not specified, the sum of all configured values must be strictly |
| smaller than the router handlers thus the left will be allocated to the |
| concurrent calls. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.fairness.acquire.timeout</name> |
| <value>1s</value> |
| <description> |
| The maximum time to wait for a permit. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.federation.rename.bandwidth</name> |
| <value>10</value> |
| <description> |
| Specify bandwidth per map in MB. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.federation.rename.map</name> |
| <value>10</value> |
| <description> |
| Max number of concurrent maps to use for copy. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.federation.rename.delay</name> |
| <value>1000</value> |
| <description> |
| Specify the delayed duration(millie seconds) when the job needs to retry. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.federation.rename.diff</name> |
| <value>0</value> |
| <description> |
| Specify the threshold of the diff entries that used in incremental copy |
| stage. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.federation.rename.option</name> |
| <value>NONE</value> |
| <description> |
| Specify the action when rename across namespaces. The option can be NONE |
| and DISTCP. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.federation.rename.force.close.open.file</name> |
| <value>true</value> |
| <description> |
| Force close all open files when there is no diff in the DIFF_DISTCP stage. |
| </description> |
| </property> |
| |
| <property> |
| <name>dfs.federation.router.federation.rename.trash</name> |
| <value>trash</value> |
| <description> |
| This options has 3 values: trash (move the source path to trash), delete |
| (delete the source path directly) and skip (skip both trash and deletion). |
| </description> |
| </property> |
| </configuration> |