# How to modify the ES configuration and reboot ES cluster properly? **URL:** \ **Category:** Elasticsearch\ **Created:** [August 9, 2017, 2:55am UTC](https://discuss.elastic.co/t/how-to-modify-the-es-configuration-and-reboot-es-cluster-properly/96367 "2017-08-09T02:55:47Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![KeithTt](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/keithtt/32/29447_2.png) [@KeithTt](https://discuss.elastic.co/u/KeithTt)\ **Post date:** [August 9, 2017, 2:55am UTC](https://discuss.elastic.co/t/how-to-modify-the-es-configuration-and-reboot-es-cluster-properly/96367/1 "2017-08-09T02:55:47Z")
ELK version: 5.5.1 Restart nodes one by one is terrible...... Should I refer to this guide? [https://www.elastic.co/guide/en/elasticsearch/reference/5.5/rolling-upgrades.html](https://www.elastic.co/guide/en/elasticsearch/reference/5.5/rolling-upgrades.html) ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [August 9, 2017, 4:53am UTC](https://discuss.elastic.co/t/how-to-modify-the-es-configuration-and-reboot-es-cluster-properly/96367/2 "2017-08-09T04:53:05Z")
That is the correct method. Also we’ve renamed ELK to the Elastic Stack, otherwise Beats feels left out 😉 ---
**Author:** ![KeithTt](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/keithtt/32/29447_2.png) [@KeithTt](https://discuss.elastic.co/u/KeithTt)\ **Post date:** [August 10, 2017, 3:57am UTC](https://discuss.elastic.co/t/how-to-modify-the-es-configuration-and-reboot-es-cluster-properly/96367/3 "2017-08-10T03:57:54Z")
So...If there are 10 nodes in the cluster, it possibly needs one day to restart all the nodes. ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [August 10, 2017, 3:59am UTC](https://discuss.elastic.co/t/how-to-modify-the-es-configuration-and-reboot-es-cluster-properly/96367/4 "2017-08-10T03:59:13Z")
Why? ---
**Author:** ![KeithTt](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/keithtt/32/29447_2.png) [@KeithTt](https://discuss.elastic.co/u/KeithTt)\ **Post date:** [August 10, 2017, 4:03am UTC](https://discuss.elastic.co/t/how-to-modify-the-es-configuration-and-reboot-es-cluster-properly/96367/5 "2017-08-10T04:03:58Z")
When one node is restarted, should I wait all the shards been allocated and the cluster's status recover to green? This progress spend much time... ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [August 10, 2017, 4:07am UTC](https://discuss.elastic.co/t/how-to-modify-the-es-configuration-and-reboot-es-cluster-properly/96367/6 "2017-08-10T04:07:00Z")
If you are on version 5, then delayed allocation and synced shards should negate any delays. If they aren't, then it'd be great to know more information. ---
**Author:** ![KeithTt](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/keithtt/32/29447_2.png) [@KeithTt](https://discuss.elastic.co/u/KeithTt)\ **Post date:** [August 10, 2017, 4:28am UTC](https://discuss.elastic.co/t/how-to-modify-the-es-configuration-and-reboot-es-cluster-properly/96367/7 "2017-08-10T04:28:37Z")
Even if I disable shard allocation and perform a synced flush before I restart each node, it still spends much time to recover after I reenable shard allocation... ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [September 7, 2017, 4:29am UTC](https://discuss.elastic.co/t/how-to-modify-the-es-configuration-and-reboot-es-cluster-properly/96367/8 "2017-09-07T04:29:09Z")
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