Package com.hazelcast.jet.core

Class JetProperties

java.lang.Object
com.hazelcast.jet.core.JetProperties
public final class JetProperties
extends Object
Defines the names and default values for internal Hazelcast Jet properties.
Since:
3.2

  • Field Details

    • JOB_SCAN_PERIOD

      public static final HazelcastProperty JOB_SCAN_PERIOD
      Jet will periodically check for new jobs to start and perform cleanup of unused resources. This property configures how often this check and cleanup will be done. Value is in milliseconds.
      Since:
      3.2

    • JET_SHUTDOWNHOOK_ENABLED

      public static final HazelcastProperty JET_SHUTDOWNHOOK_ENABLED
      Whether a JVM shutdown hook is registered to shutdown the node gracefully when the process is terminated. The shutdown hook will terminate all running jobs and then gracefully terminate the note, in a way that is equivalent to calling JetInstance.shutdown().
      Since:
      3.2

    • JOB_RESULTS_TTL_SECONDS

      public static final HazelcastProperty JOB_RESULTS_TTL_SECONDS
      Maximum number of time in seconds the job results will be kept in the cluster. They will be automatically deleted after this period is reached.

      Default value is 7 days.

      Since:
      3.2

    • JOB_RESULTS_MAX_SIZE

      public static final HazelcastProperty JOB_RESULTS_MAX_SIZE
      Maximum number of job results to keep in the cluster, the oldest results will be automatically deleted after this size is reached.

      Default value is 1,000 jobs.

      Since:
      3.2

    • JET_HOME

      public static final HazelcastProperty JET_HOME
      Root of Jet installation. Used as default location for the lossless restart store. By default it will be automatically set to the start of the Jet installation path.
      Since:
      3.2

    • JET_IDLE_COOPERATIVE_MIN_MICROSECONDS

      public static final HazelcastProperty JET_IDLE_COOPERATIVE_MIN_MICROSECONDS
      The minimum time in microseconds the cooperative worker threads will sleep if none of the tasklets made any progress. Lower values increase idle CPU usage but may result in decreased latency. Higher values will increase latency and very high values (>10000µs) will also limit throughput.

      The default is value is 25µs.

      Note: the underlying LockSupport.parkNanos(long) call may actually sleep longer depending on the operating system (up to 15000µs on Windows). See the Hazelcast blog post about this subject for more details.

      See also: JET_IDLE_COOPERATIVE_MAX_MICROSECONDS

      Since:
      3.2

    • JET_IDLE_COOPERATIVE_MAX_MICROSECONDS

      public static final HazelcastProperty JET_IDLE_COOPERATIVE_MAX_MICROSECONDS
      The maximum time in microseconds the cooperative worker threads will sleep if none of the tasklets made any progress. Lower values increase idle CPU usage but may result in decreased latency. Higher values will increase latency and very high values (>10000µs) will also limit throughput.

      The default is value is 500µs.

      Note: the underlying LockSupport.parkNanos(long) call may actually sleep longer depending on the operating system (up to 15000µs on Windows). See the Hazelcast blog post about this subject for more details.

      See also: JET_IDLE_COOPERATIVE_MIN_MICROSECONDS

      Since:
      3.2

    • JET_IDLE_NONCOOPERATIVE_MIN_MICROSECONDS

      public static final HazelcastProperty JET_IDLE_NONCOOPERATIVE_MIN_MICROSECONDS
      The minimum time in microseconds the non-cooperative worker threads will sleep if none of the tasklets made any progress. Lower values increase idle CPU usage but may result in decreased latency. Higher values will increase latency and very high values (>10000µs) will also limit throughput.

      The default is value is 25µs.

      Note: the underlying LockSupport.parkNanos(long) call may actually sleep longer depending on the operating system (up to 15000µs on Windows). See the Hazelcast blog post about this subject for more details.

      See also: JET_IDLE_NONCOOPERATIVE_MAX_MICROSECONDS

      Since:
      3.2

    • JET_IDLE_NONCOOPERATIVE_MAX_MICROSECONDS

      public static final HazelcastProperty JET_IDLE_NONCOOPERATIVE_MAX_MICROSECONDS
      The maximum time in microseconds the non-cooperative worker threads will sleep if none of the tasklets made any progress. Lower values increase idle CPU usage but may result in decreased latency. Higher values will increase latency and very high values (>10000µs) will also limit throughput.

      The default is value is 5000µs.

      Note: the underlying LockSupport.parkNanos(long) call may actually sleep longer depending on the operating system (up to 15000µs on Windows). See the Hazelcast blog post about this subject for more details.

      See also: JET_IDLE_NONCOOPERATIVE_MIN_MICROSECONDS

      Since:
      3.2