# Partitioner

Tooz provides a partitioner object based on its consistent hash ring implementation. It can be used to map Python objects to one or several nodes. The partitioner object automatically keeps track of nodes joining and leaving the group, so the rebalancing is managed.

    # Copyright (C) 2020 Red Hat, Inc.
    #
    # Licensed under the Apache License, Version 2.0 (the "License");
    # you may not use this file except in compliance with the License.
    # You may obtain a copy of the License at
    #
    #    http://www.apache.org/licenses/LICENSE-2.0
    #
    # Unless required by applicable law or agreed to in writing, software
    # distributed under the License is distributed on an "AS IS" BASIS,
    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
    # implied.
    # See the License for the specific language governing permissions and
    # limitations under the License.

    from tooz import coordination

    coordinator = coordination.get_coordinator('zake://', b'host-1')
    coordinator.start()
    partitioner = coordinator.join_partitioned_group("group1")

    # Returns {'host-1'}
    member = partitioner.members_for_object(object())

    coordinator.leave_partitioned_group(partitioner)
    coordinator.stop()

this page last updated: 2024-03-11 13:06:07

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