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Package rink provides distributed role scheduling using etcd. A scheduler instance allows arbitrary roles to be assumed by only a single member of a cluster of distributed processes. A cluster is maintained as a "distributed sticky ranked ring" using etcd which assigns a rank (order) to each member. Roles are consistently hashed to the mth (of n) member. Etcd's concurrency.Session is used to identify members and act as liveliness proxy. Etcd's concurrency.Election is used to elect a leader to maintain the cluster and broadcast state updates to the members. Etcd's concurrency.Mutex is used to lock roles to prevent overlapping role assignment. When members join or leave the cluster, the size (n) changes which results in roles being rebalanced. Stickiness is provided by a configurable rebalance delay, allowing joining members to wait before triggering a rebalance of roles. If another member leaves while a member is waiting, its rank will be transferred immediately without affecting other members. If a member leaves and there are no waiting members, a rebalance is triggered affecting all instances.
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purl: pkg:golang/github.com/luno/rink/v2
License: MIT
Latest release: over 1 year ago
First release: over 2 years ago
Namespace: github.com/luno/rink
Stars: 8 on GitHub
Forks: 2 on GitHub
Total Commits: 30
Committers: 4
Average commits per author: 7.5
Development Distribution Score (DDS): 0.267
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Last synced: about 1 month ago