# What Does '0-all' Mean? **URL:** \ **Category:** Elasticsearch\ **Created:** [February 2, 2012, 3:30pm UTC](https://discuss.elastic.co/t/what-does-0-all-mean/6574 "2012-02-02T15:30:16Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Kenneth\_Loafman](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kenneth_loafman/32/2224_2.png) [@Kenneth\_Loafman](https://discuss.elastic.co/u/Kenneth_Loafman)\ **Post date:** [February 2, 2012, 3:30pm UTC](https://discuss.elastic.co/t/what-does-0-all-mean/6574/1 "2012-02-02T15:30:16Z")
Hi, What does the setting '0-all' mean as a value to auto\_expand\_replicas? Is there a '1-all'? 'N-all'? BTW, '0-all' makes a lousy search term. Too much noise. ...Thanks, ...Ken ---
**Author:** ![Kenneth\_Loafman](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kenneth_loafman/32/2224_2.png) [@Kenneth\_Loafman](https://discuss.elastic.co/u/Kenneth_Loafman)\ **Post date:** [February 2, 2012, 5:42pm UTC](https://discuss.elastic.co/t/what-does-0-all-mean/6574/2 "2012-02-02T17:42:02Z")
Following up a bit --- I am trying to increase the number of replicas in the percolator and would like to maintain the auto-expand feature. If I have the settings as: ``` "index" : { "number_of_replicas" : 2, "auto_expand_replicas" : "0-all" } ``` and PUT the new settings as: ``` "index" : { "number_of_replicas" : 4, "auto_expand_replicas" : "0-all" } ``` absolutely nothing happens except the original settings remain. If I try: ``` "index" : { "number_of_replicas" : 2, "auto_expand_replicas" : "4-all" } ``` it takes the setting and returns: ``` "index" : { "number_of_replicas" : 4, "auto_expand_replicas" : "4-all" } ``` and sets up 6 unassigned shards which never get initialized and the cluster stays in yellow. The percolator index is only a few thousand entries, so I would expect the new replicas to get created quickly, but an hour later, they are still unassigned. So, how is this supposed to work? I'm confused. ...Thanks, ...Ken On Thu, Feb 2, 2012 at 9:30 AM, Kenneth Loafman [kenneth.loafman@gmail.com](mailto:kenneth.loafman@gmail.com)wrote: > Hi, > > What does the setting '0-all' mean as a value to auto\_expand\_replicas? Is > there a '1-all'? 'N-all'? > > BTW, '0-all' makes a lousy search term. Too much noise. > > ...Thanks, > ...Ken ---
**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\ **Post date:** [February 5, 2012, 11:23am UTC](https://discuss.elastic.co/t/what-does-0-all-mean/6574/3 "2012-02-05T11:23:44Z")
What are you after specifically? The auto expand replicas mainly make sense when an index has 1 shard, and it will automatically expand the number of replicas to fit the number of data nodes. On Thursday, February 2, 2012 at 7:42 PM, Kenneth Loafman wrote: > Following up a bit --- I am trying to increase the number of replicas in the percolator and would like to maintain the auto-expand feature. If I have the settings as: > > ``` > "index" : { > "number_of_replicas" : 2, > "auto_expand_replicas" : "0-all" > } > > ``` > > and PUT the new settings as: > > ``` > "index" : { > "number_of_replicas" : 4, > "auto_expand_replicas" : "0-all" > > } > > ``` > > absolutely nothing happens except the original settings remain. > > If I try: > > ``` > "index" : { > "number_of_replicas" : 2, > "auto_expand_replicas" : "4-all" > > } > > ``` > > it takes the setting and returns: > > ``` > "index" : { > "number_of_replicas" : 4, > "auto_expand_replicas" : "4-all" > > } > > ``` > > and sets up 6 unassigned shards which never get initialized and the cluster stays in yellow. The percolator index is only a few thousand entries, so I would expect the new replicas to get created quickly, but an hour later, they are still unassigned. > > So, how is this supposed to work? I'm confused. > > ...Thanks, > ...Ken > > On Thu, Feb 2, 2012 at 9:30 AM, Kenneth Loafman \<[kenneth.loafman@gmail.com](mailto:kenneth.loafman@gmail.com) ([mailto:kenneth.loafman@gmail.com](mailto:kenneth.loafman@gmail.com))\> wrote: > > > Hi, > > > > What does the setting '0-all' mean as a value to auto\_expand\_replicas? Is there a '1-all'? 'N-all'? > > > > BTW, '0-all' makes a lousy search term. Too much noise. > > > > ...Thanks, > > ...Ken ---
**Author:** ![Kenneth\_Loafman\_2](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kenneth_loafman_2/32/2224_2.png) [@Kenneth\_Loafman\_2](https://discuss.elastic.co/u/Kenneth_Loafman_2)\ **Post date:** [February 5, 2012, 4:01pm UTC](https://discuss.elastic.co/t/what-does-0-all-mean/6574/4 "2012-02-05T16:01:37Z")
Specifically, more \_percolator replicas to increase the number of percolator engines. I discovered in a later message that you can have only one shard/replica per node, so what I did was increase the number of nodes on each machine in the percolator cluster (we're using a percolator cluster and a search cluster since we put a very heavy load on the percolator and that was affecting search). I played with other numbers than 0, like 4-all, with no luck. The additional replicas remained unassigned and the cluster state stays yellow. I am still curious what the intent of the parameter is since I can find no documentation. On Sun, Feb 5, 2012 at 5:23 AM, Shay Banon [kimchy@gmail.com](mailto:kimchy@gmail.com) wrote: > What are you after specifically? The auto expand replicas mainly make > sense when an index has 1 shard, and it will automatically expand the > number of replicas to fit the number of data nodes. > > On Thursday, February 2, 2012 at 7:42 PM, Kenneth Loafman wrote: > > Following up a bit --- I am trying to increase the number of replicas in > the percolator and would like to maintain the auto-expand feature. If I > have the settings as: > > ``` > "index" : { > "number_of_replicas" : 2, > "auto_expand_replicas" : "0-all" > } > > ``` > > and PUT the new settings as: > > ``` > "index" : { > "number_of_replicas" : 4, > "auto_expand_replicas" : "0-all" > } > > ``` > > absolutely nothing happens except the original settings remain. > > If I try: > > ``` > "index" : { > "number_of_replicas" : 2, > "auto_expand_replicas" : "4-all" > } > > ``` > > it takes the setting and returns: > > ``` > "index" : { > "number_of_replicas" : 4, > "auto_expand_replicas" : "4-all" > } > > ``` > > and sets up 6 unassigned shards which never get initialized and the > cluster stays in yellow. The percolator index is only a few thousand > entries, so I would expect the new replicas to get created quickly, but an > hour later, they are still unassigned. > > So, how is this supposed to work? I'm confused. > > ...Thanks, > ...Ken > > On Thu, Feb 2, 2012 at 9:30 AM, Kenneth Loafman \<[kenneth.loafman@gmail.com](mailto:kenneth.loafman@gmail.com) > > > wrote: > > Hi, > > What does the setting '0-all' mean as a value to auto\_expand\_replicas? Is > there a '1-all'? 'N-all'? > > BTW, '0-all' makes a lousy search term. Too much noise. > > ...Thanks, > ...Ken ---
**Author:** ![Kenneth\_Loafman](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kenneth_loafman/32/2224_2.png) [@Kenneth\_Loafman](https://discuss.elastic.co/u/Kenneth_Loafman)\ **Post date:** [February 5, 2012, 4:03pm UTC](https://discuss.elastic.co/t/what-does-0-all-mean/6574/5 "2012-02-05T16:03:54Z")
Specifically, more \_percolator replicas to increase the number of percolator engines. I discovered in a later message that you can have only one shard/replica per node, so what I did was increase the number of nodes on each machine in the percolator cluster (we're using a percolator cluster and a search cluster since we put a very heavy load on the percolator and that was affecting search). I played with other numbers than 0, like 4-all, with no luck. The additional replicas remained unassigned and the cluster state stays yellow. I am still curious what the intent of the parameter is since I can find no documentation. On Sun, Feb 5, 2012 at 5:23 AM, Shay Banon [kimchy@gmail.com](mailto:kimchy@gmail.com) wrote: > What are you after specifically? The auto expand replicas mainly make > sense when an index has 1 shard, and it will automatically expand the > number of replicas to fit the number of data nodes. > > On Thursday, February 2, 2012 at 7:42 PM, Kenneth Loafman wrote: > > Following up a bit --- I am trying to increase the number of replicas in > the percolator and would like to maintain the auto-expand feature. If I > have the settings as: > > ``` > "index" : { > "number_of_replicas" : 2, > "auto_expand_replicas" : "0-all" > } > > ``` > > and PUT the new settings as: > > ``` > "index" : { > "number_of_replicas" : 4, > "auto_expand_replicas" : "0-all" > } > > ``` > > absolutely nothing happens except the original settings remain. > > If I try: > > ``` > "index" : { > "number_of_replicas" : 2, > "auto_expand_replicas" : "4-all" > } > > ``` > > it takes the setting and returns: > > ``` > "index" : { > "number_of_replicas" : 4, > "auto_expand_replicas" : "4-all" > } > > ``` > > and sets up 6 unassigned shards which never get initialized and the > cluster stays in yellow. The percolator index is only a few thousand > entries, so I would expect the new replicas to get created quickly, but an > hour later, they are still unassigned. > > So, how is this supposed to work? I'm confused. > > ...Thanks, > ...Ken > > On Thu, Feb 2, 2012 at 9:30 AM, Kenneth Loafman \<[kenneth.loafman@gmail.com](mailto:kenneth.loafman@gmail.com) > > > wrote: > > Hi, > > What does the setting '0-all' mean as a value to auto\_expand\_replicas? Is > there a '1-all'? 'N-all'? > > BTW, '0-all' makes a lousy search term. Too much noise. > > ...Thanks, > ...Ken ---
**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, 3:40am UTC](https://discuss.elastic.co/t/what-does-0-all-mean/6574/6 "2017-07-06T03:40:34Z")