# Questions about elasticsearch **URL:** \ **Category:** Elasticsearch\ **Created:** [March 6, 2013, 5:06pm UTC](https://discuss.elastic.co/t/questions-about-elasticsearch/11037 "2013-03-06T17:06:31Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![yahia](https://avatars.discourse-cdn.com/v4/letter/y/d9b06d/32.png) [@yahia](https://discuss.elastic.co/u/yahia)\ **Post date:** [March 6, 2013, 5:06pm UTC](https://discuss.elastic.co/t/questions-about-elasticsearch/11037/1 "2013-03-06T17:06:31Z")
Hi all, I use elasticsearch for some time, but I still have ideas that are not too Clere for me, and I would like to have a Response: if we have nodes running on different machines, how one will know the other,how they will communicate and the notion of scalability how it will be respected -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![vineeth\_mohan](https://avatars.discourse-cdn.com/v4/letter/v/bc79bd/32.png) [@vineeth\_mohan](https://discuss.elastic.co/u/vineeth_mohan)\ **Post date:** [March 6, 2013, 5:19pm UTC](https://discuss.elastic.co/t/questions-about-elasticsearch/11037/2 "2013-03-06T17:19:23Z")
There is something called "multi casting". ES uses that to see if there are other es instances in the network with the same cluster name. If there is , it will join that es instance and form a cluster. Now about scalability - Say if there are 2 instances of ES in network and they have joined to form a cluster , when you give 1000 documents to ES to index , it will store 500 documents in one instance and 500 documents in another instance. Here when a query is made , the query is executed on both the instances and result is aggregated to form the final result. Hence just by increasing the number of instances in network , ES can work as a distributed application and divide the load between all the nodes. Going ahead , look into what is shards and replicas. That should give you a complete idea. Thanks Vineeth On Wed, Mar 6, 2013 at 10:36 PM, Ammar Yahia [yahia.ammar.info@gmail.com](mailto:yahia.ammar.info@gmail.com)wrote: > Hi all, > > I use elasticsearch for some time, but I still have ideas that are not too > Clere for me, and I would like to have a Response: > > if we have nodes running on different machines, how one will know the > other,how they will communicate and the notion of scalability how it will > be respected > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![yahia](https://avatars.discourse-cdn.com/v4/letter/y/d9b06d/32.png) [@yahia](https://discuss.elastic.co/u/yahia)\ **Post date:** [March 6, 2013, 5:30pm UTC](https://discuss.elastic.co/t/questions-about-elasticsearch/11037/3 "2013-03-06T17:30:40Z")
Le mercredi 6 mars 2013 18:06:31 UTC+1, Ammar Yahia a écrit : > Hi all, > > I use elasticsearch for some time, but I still have ideas that are not too > Clere for me, and I would like to have a Response: > > if we have nodes running on different machines, how one will know the > other,how they will communicate and the notion of scalability how it will > be respected -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![yahia](https://avatars.discourse-cdn.com/v4/letter/y/d9b06d/32.png) [@yahia](https://discuss.elastic.co/u/yahia)\ **Post date:** [March 6, 2013, 5:36pm UTC](https://discuss.elastic.co/t/questions-about-elasticsearch/11037/4 "2013-03-06T17:36:21Z")
thank you Vineeth, it's clear now Assuming we have a client that uses a node, if the node fails, another node will be awarded for the client? -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**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, 2:48am UTC](https://discuss.elastic.co/t/questions-about-elasticsearch/11037/5 "2017-07-06T02:48:01Z")
Closed on July 6, 2017, 2:48am UTC