# Number of replicas **URL:** \ **Category:** Elasticsearch\ **Created:** [October 24, 2012, 5:55am UTC](https://discuss.elastic.co/t/number-of-replicas/9455 "2012-10-24T05:55:07Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Marcin\_Dojwa](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marcin_dojwa/32/2307_2.png) [@Marcin\_Dojwa](https://discuss.elastic.co/u/Marcin_Dojwa)\ **Post date:** [October 24, 2012, 5:55am UTC](https://discuss.elastic.co/t/number-of-replicas/9455/1 "2012-10-24T05:55:07Z")
Hi, I have the following situation: - 3 nodes - 1 index with 60 shards and 2 replicas - NO data yet After starting all nodes I have all 180 shards as 'unassigned' in /\_cluster/health. After changing the index setting to have only 1 replica all the shards got activated. My question is: what is the reason of this and is there any connection between number of replicas, number of shards and minimum number of nodes ? Thank you for help. Best regards. Marcin Dojwa -- ---
**Author:** ![Marcin\_Dojwa](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marcin_dojwa/32/2307_2.png) [@Marcin\_Dojwa](https://discuss.elastic.co/u/Marcin_Dojwa)\ **Post date:** [October 24, 2012, 5:57am UTC](https://discuss.elastic.co/t/number-of-replicas/9455/2 "2012-10-24T05:57:38Z")
I have default settings for all nodes, all nodes are the same. 2012/10/24 Marcin Dojwa [m.dojwa@livechatinc.com](mailto:m.dojwa@livechatinc.com) > Hi, > > I have the following situation: > > - 3 nodes > - 1 index with 60 shards and 2 replicas > - NO data yet > > After starting all nodes I have all 180 shards as 'unassigned' in > /\_cluster/health. After changing the index setting to have only 1 replica > all the shards got activated. > My question is: what is the reason of this and is there any connection > between number of replicas, number of shards and minimum number of nodes ? > > Thank you for help. > Best regards. > Marcin Dojwa -- ---
**Author:** ![Igor\_Motov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/igor_motov/32/45193_2.png) [@Igor\_Motov](https://discuss.elastic.co/u/Igor_Motov)\ **Post date:** [October 24, 2012, 11:24am UTC](https://discuss.elastic.co/t/number-of-replicas/9455/3 "2012-10-24T11:24:28Z")
Interesting. What happens if you change number of replicas back to 2? Can you recreate the problem and post complete output of the /\_cluster/health command? On Wednesday, October 24, 2012 1:57:41 AM UTC-4, Marcin Dojwa wrote: > I have default settings for all nodes, all nodes are the same. > > 2012/10/24 Marcin Dojwa \<[m.d...@livechatinc.com](mailto:m.d...@livechatinc.com) \\> > > > Hi, > > > > I have the following situation: > > > > - 3 nodes > > - 1 index with 60 shards and 2 replicas > > - NO data yet > > > > After starting all nodes I have all 180 shards as 'unassigned' in > > /\_cluster/health. After changing the index setting to have only 1 replica > > all the shards got activated. > > My question is: what is the reason of this and is there any connection > > between number of replicas, number of shards and minimum number of nodes ? > > > > Thank you for help. > > Best regards. > > Marcin Dojwa -- ---
**Author:** ![Marcin\_Dojwa](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marcin_dojwa/32/2307_2.png) [@Marcin\_Dojwa](https://discuss.elastic.co/u/Marcin_Dojwa)\ **Post date:** [October 25, 2012, 7:56am UTC](https://discuss.elastic.co/t/number-of-replicas/9455/4 "2012-10-25T07:56:50Z")
Hi, After setting it back to 2 replicas all shards gets assigned. It works fine now even if I stop all nodes and start them again. The problem was when I started new cluster with 3 nodes, 1 index (60 shards and 2 replicas) and NO data. All the shards got assigned after changing replicas to 1. Now it looks like it works, but I suggest checking this by the author if this is not a bigger problem. This is how it looked like at the beginning. 1. There are 3 nodes with 1 index with 60 shards and 2 replicas (all nodes are stopped) 2. After starting 1st node /\_cluster/health: { } 1. After starting 2nd node: { } 1. After starting 3rd node: { } 1. After changing replicas to 1: { } Best regards. 2012/10/24 Igor Motov [imotov@gmail.com](mailto:imotov@gmail.com) > Interesting. What happens if you change number of replicas back to 2? Can > you recreate the problem and post complete output of the /\_cluster/health > command? > > On Wednesday, October 24, 2012 1:57:41 AM UTC-4, Marcin Dojwa wrote: > > > I have default settings for all nodes, all nodes are the same. > > > > 2012/10/24 Marcin Dojwa [m.d...@livechatinc.com](mailto:m.d...@livechatinc.com) > > > > Hi, > > > > > I have the following situation: > > > > > > - 3 nodes > > > - 1 index with 60 shards and 2 replicas > > > - NO data yet > > > > > > After starting all nodes I have all 180 shards as 'unassigned' in > > > /\_cluster/health. After changing the index setting to have only 1 replica > > > all the shards got activated. > > > My question is: what is the reason of this and is there any connection > > > between number of replicas, number of shards and minimum number of nodes ? > > > > > > Thank you for help. > > > Best regards. > > > Marcin Dojwa > > > > -- -- ---
**Author:** ![Ivan](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@Ivan](https://discuss.elastic.co/u/Ivan)\ **Post date:** [October 25, 2012, 4:51pm UTC](https://discuss.elastic.co/t/number-of-replicas/9455/5 "2012-10-25T16:51:37Z")
Did you change discovery.zen.minimum\_master\_nodes? Probably would not account for this behavior, just wondering what your value is. On Thu, Oct 25, 2012 at 12:56 AM, Marcin Dojwa [m.dojwa@livechatinc.com](mailto:m.dojwa@livechatinc.com)wrote: > Hi, > > After setting it back to 2 replicas all shards gets assigned. It works > fine now even if I stop all nodes and start them again. The problem was > when I started new cluster with 3 nodes, 1 index (60 shards and 2 replicas) > and NO data. All the shards got assigned after changing replicas to 1. Now > it looks like it works, but I suggest checking this by the author if this > is not a bigger problem. > > This is how it looked like at the beginning. > > 1. There are 3 nodes with 1 index with 60 shards and 2 replicas (all nodes > are stopped) > > 2. After starting 1st node /\_cluster/health: > { > > } > > 1. After starting 2nd node: > { > > } > > 1. After starting 3rd node: > { > > } > > 1. After changing replicas to 1: > { > > } > > Best regards. > > 2012/10/24 Igor Motov [imotov@gmail.com](mailto:imotov@gmail.com) > > > Interesting. What happens if you change number of replicas back to 2? Can > > you recreate the problem and post complete output of the /\_cluster/health > > command? > > > > On Wednesday, October 24, 2012 1:57:41 AM UTC-4, Marcin Dojwa wrote: > > > > > I have default settings for all nodes, all nodes are the same. > > > > > > 2012/10/24 Marcin Dojwa [m.d...@livechatinc.com](mailto:m.d...@livechatinc.com) > > > > > > Hi, > > > > > > > I have the following situation: > > > > > > > > - 3 nodes > > > > - 1 index with 60 shards and 2 replicas > > > > - NO data yet > > > > > > > > After starting all nodes I have all 180 shards as 'unassigned' in > > > > /\_cluster/health. After changing the index setting to have only 1 replica > > > > all the shards got activated. > > > > My question is: what is the reason of this and is there any connection > > > > between number of replicas, number of shards and minimum number of nodes ? > > > > > > > > Thank you for help. > > > > Best regards. > > > > Marcin Dojwa > > > > > > -- > > -- -- ---
**Author:** ![Marcin\_Dojwa](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/marcin_dojwa/32/2307_2.png) [@Marcin\_Dojwa](https://discuss.elastic.co/u/Marcin_Dojwa)\ **Post date:** [October 25, 2012, 6:21pm UTC](https://discuss.elastic.co/t/number-of-replicas/9455/6 "2012-10-25T18:21:14Z")
Hi, I didn't change this value, it is set to default. W dniu czwartek, 25 października 2012 użytkownik Ivan Brusic napisał: > Did you change discovery.zen.minimum\_master\_nodes? Probably would not > account for this behavior, just wondering what your value is. > > On Thu, Oct 25, 2012 at 12:56 AM, Marcin Dojwa \<[m.dojwa@livechatinc.com](mailto:m.dojwa@livechatinc.com)\ > > > wrote: > > > Hi, > > > > After setting it back to 2 replicas all shards gets assigned. It works > > fine now even if I stop all nodes and start them again. The problem was > > when I started new cluster with 3 nodes, 1 index (60 shards and 2 replicas) > > and NO data. All the shards got assigned after changing replicas to 1. Now > > it looks like it works, but I suggest checking this by the author if this > > is not a bigger problem. > > > > This is how it looked like at the beginning. > > > > 1. There are 3 nodes with 1 index with 60 shards and 2 replicas (all > > nodes are stopped) > > > > 2. After starting 1st node /\_cluster/health: > > { > > > > } > > > > 1. After starting 2nd node: > > { > > > > -- > > -- -- ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 3:07am UTC](https://discuss.elastic.co/t/number-of-replicas/9455/7 "2017-07-06T03:07:11Z")