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West Europe (created January 29, 2021 or later).

South East Asia (created January 31, 2021 or later).

North Europe (created January 28, 2021 or later).

Japan East (created January 30, 2021 or later).

Germany West Central (created May 3, 2021, or later).

France Central (created October 23, 2020 or later).

Central US (created December 4, 2020 or later).

Canada Central (created January 30, 2021 or later).Australia East (created January 30, 2021 or later).There is no specific action on your part, except to create a search service in a region that provides Availability Zones, and then to configure the service to use multiple replicas.Īzure Cognitive Search currently supports Availability Zones for Standard tier or higher search services that were created in one of the following regions: If you have more replicas than Availability Zones, the replicas will be distributed across Availability Zones as evenly as possible. Each replica will be placed in a different Availability Zone within the region. You can utilize Availability Zones with Azure Cognitive Search by adding two or more replicas to your search service. A search service runs within one region its replicas run in different zones. If you use Availability Zones for Cognitive Search, individual replicas are the units for zone assignment.

Data ResidencyĪzure Cognitive Search will not store customer data outside the customer-specified region without your authorization.Īvailability Zones are an Azure platform capability that divides a region's data centers into distinct physical location groups to provide high-availability, within the same region. For more information, see SLA for Azure Cognitive Search. Three or more replicas for high availability of read-write workloads (queries and indexing) Two replicas for high availability of read-only workloads (queries) For more information about adding replicas, see Add or reduce replicas and partitions.įor each individual search service, Microsoft guarantees at least 99.9% availability for configurations that meet these criteria: Having multiple replicas allows Azure Cognitive Search to do machine reboots and maintenance against one replica, while query execution continues on other replicas. In Cognitive Search, replicas are copies of your index. This article provides guidance that you can use as a starting point for developing a strategy that meets your business requirements for both availability and continuous operations. In Cognitive Search, availability is achieved through multiple replicas, whereas business continuity (and disaster recovery) is achieved through multiple search services.