# Migrating as soon as node downtime? Restart node is a heavy work?

**URL:** <https://discuss.aerospike.com/t/migrating-as-soon-as-node-downtime-restart-node-is-a-heavy-work/4814>\
**Category:** General Discussion\
**Tags:** migration\
**Created:** [December 13, 2017, 9:39am UTC](https://discuss.aerospike.com/t/migrating-as-soon-as-node-downtime-restart-node-is-a-heavy-work/4814 "2017-12-13T09:39:34Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![lgs](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/lgs/32/1957_2.png) [@lgs](https://discuss.aerospike.com/u/lgs)\
**Post date:** [December 13, 2017, 9:39am UTC](https://discuss.aerospike.com/t/migrating-as-soon-as-node-downtime-restart-node-is-a-heavy-work/4814/1 "2017-12-13T09:39:34Z")

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It seemly that Aerospike node start to migrate as soon as the node is down. What’s more, if I restart the down node, the node start cold start and cluster rebalance all data. If it is a heavy work for node to restart?

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**Author:** ![rguo](https://avatars.discourse-cdn.com/v4/letter/r/a587f6/32.png) [@rguo](https://discuss.aerospike.com/u/rguo)\
**Post date:** [December 13, 2017, 5:53pm UTC](https://discuss.aerospike.com/t/migrating-as-soon-as-node-downtime-restart-node-is-a-heavy-work/4814/2 "2017-12-13T17:53:15Z")

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Yes, having migrations adds a decent amount of load to a running cluster.

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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:** [December 13, 2017, 7:36pm UTC](https://discuss.aerospike.com/t/migrating-as-soon-as-node-downtime-restart-node-is-a-heavy-work/4814/3 "2017-12-13T19:36:59Z")

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Aerospike Enterprise has Fast Restart and Rapid Rebalace. These allow a node to restart and fully migrate data in minutes rather than hours.

A migration tuning guide can be found here: [Tuning of migrate-sleep - Setting the migrate-sleep value on the recipient side has no effect](https://discuss.aerospike.com/t/tuning-of-migrate-sleep-setting-the-migrate-sleep-value-on-the-recipient-side-vs-sender-side-is-irrelevant/3656).

A feature comparison of Enterprise and Community can be found at [Database Features and Editions | Aerospike](https://www.aerospike.com/products/product-matrix/).