[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-09-04 (世界標準時間)。"],[],[],null,["# Single-zone instances\n\nThis page gives an overview of single-zone instances for Memorystore for Redis Cluster.\n\nFor instructions on provisioning a single-zone instance see [Create a single-zone instance](/memorystore/docs/cluster/create-instances#create_a_single-zone_instance).\n\nBy default, Memorystore for Redis Cluster distributes an instance's nodes evenly among\navailable zones. For diagrams that show how nodes are distributed with this\nsetup, see [High availability and replicas](/memorystore/docs/cluster/ha-and-replicas).\n\nAlternatively, you can choose to create a single-zone instance. Single-zone\ninstances have lower latency than multi-zone instances because you can place\nyour clients in the same zone as the Redis nodes and avoid cross-zone\ncommunication.\n\nYou choose the zone distribution mode (single-zone or multi-zone) during\ninstance creation. After it's created, the zone distribution mode can't be\nchanged.\n\nWhen choosing between a multi-zone instance and a single-zone instance, you\nshould consider your application's tolerance for downtime or data loss if an\nunexpected zonal outage occurs.\n\nIf an unexpected outage impacts the zone where your single-zone instance located,\nyou can lose connectivity to all the nodes in the instance and experience data\nloss if either persistence or high-availability is not enabled. Alternatively,\nif an unexpected outage impacts one of the zones of a multi-zone instance, only a\nportion of the nodes may become unavailable.\n\nIf you connect to a single-zone instance from a client in the same zone, then\nyou aren't charged for [Consumer Data Processing](/vpc/pricing#psc-consumer-data-processing).\nFor more information, see [Network pricing](/memorystore/docs/cluster/pricing#network_pricing).\n\nAlthough we recommend provisioning a multi-zone instance with [High Availability](/memorystore/docs/cluster/ha-and-replicas), you should use the following recommendations for single-zone instances if they apply to you:\n\n- If you you choose to provision a single-zone instance, you should enable\n replicas. Replicas reduce shard hotspots and make shards more\n resilient against single-node failures.\n\n- If you choose to provision an instance without replicas, you should still\n use a single-zone instance. For more information, see [Choose a single-zone instance if your instance doesn't use replicas](/memorystore/docs/cluster/general-best-practices#choose_a_single-zone_instance_if_your_instance_doesnt_use_replicas).\n\nSingle-zone instance diagram example\n------------------------------------"]]
