| package backtype.storm; |
| |
| /** |
| * This class provides constants for all the configurations possible on a Storm |
| * cluster and Storm topology. Default values for these configs can be found in |
| * defaults.yaml. |
| * |
| * <p>Note that you may put other configurations in the configuration maps. Storm |
| * will ignore anything it doesn't recognize, but your topologies are free to make |
| * use of them.</p> |
| */ |
| public class Config { |
| |
| /** |
| * A list of hosts of ZooKeeper servers used to manage the cluster. |
| */ |
| public static String STORM_ZOOKEEPER_SERVERS = "storm.zookeeper.servers"; |
| |
| /** |
| * The port Storm will use to connect to each of the ZooKeeper servers. |
| */ |
| public static String STORM_ZOOKEEPER_PORT = "storm.zookeeper.port"; |
| |
| /** |
| * A directory on the local filesystem used by Storm for any local |
| * filesystem usage it needs. The directory must exist and the Storm daemons must |
| * have permission to read/write from this location. |
| */ |
| public static String STORM_LOCAL_DIR = "storm.local.dir"; |
| |
| |
| /** |
| * The mode this Storm cluster is running in. Either "distributed" or "local". |
| */ |
| public static String STORM_CLUSTER_MODE = "storm.cluster.mode"; |
| |
| /** |
| * The root location at which Storm stores data in ZooKeeper. |
| */ |
| public static String STORM_ZOOKEEPER_ROOT = "storm.zookeeper.root"; |
| |
| /** |
| * The timeout for clients to ZooKeeper. |
| */ |
| public static String STORM_ZOOKEEPER_SESSION_TIMEOUT = "storm.zookeeper.session.timeout"; |
| |
| /** |
| * The id assigned to a running topology. The id is the storm name with a unique nonce appended. |
| */ |
| public static String STORM_ID = "storm.id"; |
| |
| /** |
| * The host that the master server is running on. |
| */ |
| public static String NIMBUS_HOST = "nimbus.host"; |
| |
| /** |
| * Which port the Thrift interface of Nimbus should run on. Clients should |
| * connect to this port to upload jars and submit topologies. |
| */ |
| public static String NIMBUS_THRIFT_PORT = "nimbus.thrift.port"; |
| |
| |
| /** |
| * This parameter is used by the storm-deploy project to configure the |
| * jvm options for the nimbus daemon. |
| */ |
| public static String NIMBUS_CHILDOPTS = "nimbus.childopts"; |
| |
| |
| /** |
| * How long without heartbeating a task can go before nimbus will consider the |
| * task dead and reassign it to another location. |
| */ |
| public static String NIMBUS_TASK_TIMEOUT_SECS = "nimbus.task.timeout.secs"; |
| |
| |
| /** |
| * How often nimbus should wake up to check heartbeats and do reassignments. Note |
| * that if a machine ever goes down Nimbus will immediately wake up and take action. |
| * This parameter is for checking for failures when there's no explicit event like that |
| * occuring. |
| */ |
| public static String NIMBUS_MONITOR_FREQ_SECS = "nimbus.monitor.freq.secs"; |
| |
| |
| /** |
| * How long before a supervisor can go without heartbeating before nimbus considers it dead |
| * and stops assigning new work to it. |
| */ |
| public static String NIMBUS_SUPERVISOR_TIMEOUT_SECS = "nimbus.supervisor.timeout.secs"; |
| |
| /** |
| * A special timeout used when a task is initially launched. During launch, this is the timeout |
| * used until the first heartbeat, overriding nimbus.task.timeout.secs. |
| * |
| * <p>A separate timeout exists for launch because there can be quite a bit of overhead |
| * to launching new JVM's and configuring them.</p> |
| */ |
| public static String NIMBUS_TASK_LAUNCH_SECS = "nimbus.task.launch.secs"; |
| |
| /** |
| * Whether or not nimbus should reassign tasks if it detects that a task goes down. |
| * Defaults to true, and it's not recommended to change this value. |
| */ |
| public static String NIMBUS_REASSIGN = "nimbus.reassign"; |
| |
| /** |
| * During upload/download with the master, how long an upload or download connection is idle |
| * before nimbus considers it dead and drops the connection. |
| */ |
| public static String NIMBUS_FILE_COPY_EXPIRATION_SECS = "nimbus.file.copy.expiration.secs"; |
| |
| /** |
| * A list of ports that can run workers on this supervisor. Each worker uses one port, and |
| * the supervisor will only run one worker per port. Use this configuration to tune |
| * how many workers run on each machine. |
| */ |
| public static String SUPERVISOR_SLOTS_PORTS = "supervisor.slots.ports"; |
| |
| |
| |
| /** |
| * This parameter is used by the storm-deploy project to configure the |
| * jvm options for the supervisor daemon. |
| */ |
| public static String SUPERVISOR_CHILDOPTS = "supervisor.childopts"; |
| |
| |
| /** |
| * How long a worker can go without heartbeating before the supervisor tries to |
| * restart the worker process. |
| */ |
| public static String SUPERVISOR_WORKER_TIMEOUT_SECS = "supervisor.worker.timeout.secs"; |
| |
| |
| /** |
| * How long a worker can go without heartbeating during the initial launch before |
| * the supervisor tries to restart the worker process. This value override |
| * supervisor.worker.timeout.secs during launch because there is additional |
| * overhead to starting and configuring the JVM on launch. |
| */ |
| public static String SUPERVISOR_WORKER_START_TIMEOUT_SECS = "supervisor.worker.start.timeout.secs"; |
| |
| |
| /** |
| * Whether or not the supervisor should launch workers assigned to it. Defaults |
| * to true -- and you should probably never change this value. This configuration |
| * is used in the Storm unit tests. |
| */ |
| public static String SUPERVISOR_ENABLE = "supervisor.enable"; |
| |
| |
| /** |
| * how often the supervisor sends a heartbeat to the master. |
| */ |
| public static String SUPERVISOR_HEARTBEAT_FREQUENCY_SECS = "supervisor.heartbeat.frequency.secs"; |
| |
| |
| /** |
| * How often the supervisor checks the worker heartbeats to see if any of them |
| * need to be restarted. |
| */ |
| public static String SUPERVISOR_MONITOR_FREQUENCY_SECS = "supervisor.monitor.frequency.secs"; |
| |
| /** |
| * The jvm opts provided to workers launched by this supervisor. |
| */ |
| public static String WORKER_CHILDOPTS = "worker.childopts"; |
| |
| |
| /** |
| * How often this worker should heartbeat to the supervisor. |
| */ |
| public static String WORKER_HEARTBEAT_FREQUENCY_SECS = "worker.heartbeat.frequency.secs"; |
| |
| /** |
| * How often a task should heartbeat its status to the master. |
| */ |
| public static String TASK_HEARTBEAT_FREQUENCY_SECS = "task.heartbeat.frequency.secs"; |
| |
| |
| /** |
| * How often a task should sync its connections with other tasks (if a task is |
| * reassigned, the other tasks sending messages to it need to refresh their connections). |
| * In general though, when a reassignment happens other tasks will be notified |
| * almost immediately. This configuration is here just in case that notification doesn't |
| * come through. |
| */ |
| public static String TASK_REFRESH_POLL_SECS = "task.refresh.poll.secs"; |
| |
| |
| /** |
| * When set to true, Storm will log every message that's emitted. |
| */ |
| public static String TOPOLOGY_DEBUG = "topology.debug"; |
| |
| |
| /** |
| * Whether or not the master should optimize topologies by running multiple |
| * tasks in a single thread where appropriate. |
| */ |
| public static String TOPOLOGY_OPTIMIZE = "topology.optimize"; |
| |
| /** |
| * How many processes should be spawned around the cluster to execute this |
| * topology. Each process will execute some number of tasks as threads within |
| * them. This parameter should be used in conjunction with the parallelism hints |
| * on each component in the topology to tune the performance of a topology. |
| */ |
| public static String TOPOLOGY_WORKERS = "topology.workers"; |
| |
| /** |
| * How many acker tasks should be spawned for the topology. An acker task keeps |
| * track of a subset of the tuples emitted by spouts and detects when a spout |
| * tuple is fully processed. When an acker task detects that a spout tuple |
| * is finished, it sends a message to the spout to acknowledge the tuple. The |
| * number of ackers should be scaled with the amount of throughput going |
| * through the cluster for the topology. Typically, you don't need that many |
| * ackers though. |
| * |
| * <p>If this is set to 0, then Storm will immediately ack tuples as soon |
| * as they come off the spout, effectively disabling reliability.</p> |
| */ |
| public static String TOPOLOGY_ACKERS = "topology.ackers"; |
| |
| |
| /** |
| * The maximum amount of time given to the topology to fully process a message |
| * emitted by a spout. If the message is not acked within this time frame, Storm |
| * will fail the message on the spout. Some spouts implementations will then replay |
| * the message at a later time. |
| */ |
| public static String TOPOLOGY_MESSAGE_TIMEOUT_SECS = "topology.message.timeout.secs"; |
| |
| /** |
| * A map from unique tokens to the name of classes that implement custom serializations. |
| * Custom serializations are implemented using the {@link backtype.storm.serialization.ISerialization} |
| * interface. The unique tokens you provide are what are serialized on the wire to identify fields. This |
| * is much more efficient than writing the classname. These serializations will be used |
| * automatically when appropriate. |
| */ |
| public static String TOPOLOGY_SERIALIZATIONS = "topology.serializations"; |
| |
| /** |
| * Whether or not Storm should skip the loading of a serialization for which it |
| * does not contain the code. Otherwise, the task will fail to load and will throw |
| * an error at runtime. |
| */ |
| public static String TOPOLOGY_SKIP_MISSING_SERIALIZATIONS= "topology.skip.missing.serializations"; |
| |
| |
| /** |
| * The maximum parallelism allowed for a component in this topology. This configuration is |
| * typically used in testing to limit the number of threads spawned in local mode. |
| */ |
| public static String TOPOLOGY_MAX_TASK_PARALLELISM="topology.max.task.parallelism"; |
| |
| |
| /** |
| * The maximum parallelism allowed for a component in this topology. This configuration is |
| * typically used in testing to limit the number of threads spawned in local mode. |
| */ |
| public static String TOPOLOGY_MAX_SPOUT_PENDING="topology.max.spout.pending"; |
| |
| |
| /** |
| * The maximum amount of time a component gives a source of state to synchronize before it requests |
| * synchronization again. |
| */ |
| public static String TOPOLOGY_STATE_SYNCHRONIZATION_TIMEOUT_SECS="topology.state.synchronization.timeout.secs"; |
| |
| /** |
| * The percentage of tuples to sample to produce stats for a task. |
| */ |
| public static String TOPOLOGY_STATS_SAMPLE_RATE="topology.stats.sample.rate"; |
| |
| /** |
| * The number of threads that should be used by the zeromq context in each worker process. |
| */ |
| public static String ZMQ_THREADS = "zmq.threads"; |
| |
| |
| /** |
| * How long a connection should retry sending messages to a target host when |
| * the connection is closed. This is an advanced configuration and can almost |
| * certainly be ignored. |
| */ |
| public static String ZMQ_LINGER_MILLIS = "zmq.linger.millis"; |
| |
| /** |
| * This value is passed to spawned JVMs (e.g., Nimbus, Supervisor, and Workers) |
| * for the java.library.path value. java.library.path tells the JVM where |
| * to look for native libraries. It is necessary to set this config correctly since |
| * Storm uses the ZeroMQ and JZMQ native libs. |
| */ |
| public static String JAVA_LIBRARY_PATH = "java.library.path"; |
| |
| } |