# Are AWS AZs considered as "Cross Data Center Replication"?

**URL:** <https://discuss.aerospike.com/t/are-aws-azs-considered-as-cross-data-center-replication/1439>\
**Category:** AWS\
**Tags:** aws, xdr\
**Created:** [June 28, 2015, 4:44pm UTC](https://discuss.aerospike.com/t/are-aws-azs-considered-as-cross-data-center-replication/1439 "2015-06-28T16:44:57Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Dennis](https://avatars.discourse-cdn.com/v4/letter/d/e56c9b/32.png) [@Dennis](https://discuss.aerospike.com/u/Dennis)\
**Post date:** [June 28, 2015, 4:44pm UTC](https://discuss.aerospike.com/t/are-aws-azs-considered-as-cross-data-center-replication/1439/1 "2015-06-28T16:44:57Z")

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Hi,

Trying to understand whether I can use Community Edition in an AWS setup spanning 2 AZs, which are technically speaking - different datacenters and as we know, only Enterprise allows “Cross Data Center Replication”: [Database Features and Editions | Aerospike](http://www.aerospike.com/products-services/) ?

Thanks, Dennis

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**Author:** ![kporter](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/kporter/32/515_2.png) [@kporter](https://discuss.aerospike.com/u/kporter)\
**Post date:** [June 30, 2015, 5:15am UTC](https://discuss.aerospike.com/t/are-aws-azs-considered-as-cross-data-center-replication/1439/2 "2015-06-30T05:15:37Z")

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We do have users who have configured clusters to work across availability zones. The approach is typically to treat each AZ as a rack in a [rack-aware](http://www.aerospike.com/docs/operations/configure/network/rack-aware/) cluster. You should also increase the heartbeat timeout for such a cluster; the default settings assume the cluster nodes are tightly coupled.

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**Author:** ![Dennis](https://avatars.discourse-cdn.com/v4/letter/d/e56c9b/32.png) [@Dennis](https://discuss.aerospike.com/u/Dennis)\
**Post date:** [June 30, 2015, 2:33pm UTC](https://discuss.aerospike.com/t/are-aws-azs-considered-as-cross-data-center-replication/1439/3 "2015-06-30T14:33:53Z")

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@kporterThank you! Really valuable advice. Good to hear its not required to buy Enterprise just because we’ll have multiple AZs.

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**Author:** ![naoum](https://avatars.discourse-cdn.com/v4/letter/n/4da419/32.png) [@naoum](https://discuss.aerospike.com/u/naoum)\
**Post date:** [November 20, 2015, 5:11am UTC](https://discuss.aerospike.com/t/are-aws-azs-considered-as-cross-data-center-replication/1439/4 "2015-11-20T05:11:48Z")

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@Dennis,

Did you end up doing that? Did you run into any problems?

Thanks!