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DefaultScheduler is a stand-alone version of the scheduler, there can only be one job server under the same metadata.

WhenIf kylin.server.mode=all or job, when the Kylin Server process starts, it will initialize the DefaultScheduler and lock the job server. The implementation class of the lock is ZookeeperJobLock, which is implemented by using the temporary node of zookeeper.

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DistributedScheduler is a distributed scheduler contributed by Meituan, which is supported from since kylin version 1.6.1.

Using the DistributedScheduler as the job scheduler, you can have multiple kylin job servers under the same metadata.

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Curatorscheduler is a curator based scheduler implemented by Kyligence, which is supported from since kylin v3.0.0-alpha.

CuratorScheduler is master-slave mode. It selects a leader from all job nodes to schedule tasks. It relies on curator-recipes, a high-level feature of curator.

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