Default value for minimum master node is 1. No formula here. It was just an advice. Sorry if I was unclear. :-)
-- David ;-) Twitter : @dadoonet / @elasticsearchfr / @scrutmydocs Le 14 janv. 2014 à 20:58, Mohit Anchlia <mohitanch...@gmail.com> a écrit : > I didn't quite understand. What I am trying to find is that when default > formula of N / 2 + 1 I will always have more master nodes on one side > correct? And is my understanding incorrect that the other side that has less > master nodes than N /2 + 1 would simply not accept any requests? The only > point of increasing this value would be for performance reasons? > > On Mon, Jan 13, 2014 at 3:58 PM, Mark Walkom <ma...@campaignmonitor.com> > wrote: >> That depends on however many nodes lose contact, but it's a possibility that >> if you lose 2 of your nodes at once they will just stop responding and the >> other 3 will be ok. >> However you maintain cluster integrity. >> >> Regards, >> Mark Walkom >> >> Infrastructure Engineer >> Campaign Monitor >> email: ma...@campaignmonitor.com >> web: www.campaignmonitor.com >> >> >> On 14 January 2014 10:55, Mohit Anchlia <mohitanch...@gmail.com> wrote: >>> How would the nodes on the other side of the network become master with the >>> formula (total num of nodes / 2 + 1) one side will always become >>> inaccessible? >>> >>> On Mon, Jan 13, 2014 at 3:50 PM, Mark Walkom <ma...@campaignmonitor.com> >>> wrote: >>>> The logs shows that a node was not contactable and so was removed from the >>>> cluster. >>>> That could be a load issue on the node, network issues, or something else. >>>> Check the logs on the node that disconnected and see what you find. >>>> >>>> If you leave the defaults, you risk the chance of a split-brain situation, >>>> where nodes lose contact with each other and then decide to become a >>>> master. This can cause you to end up with multiple masters in multiple >>>> clusters, which is not good for data integrity. >>>> >>>> Setting the min masters means that if a node cannot contact N masters, it >>>> will refuse connections. >>>> >>>> Regards, >>>> Mark Walkom >>>> >>>> Infrastructure Engineer >>>> Campaign Monitor >>>> email: ma...@campaignmonitor.com >>>> web: www.campaignmonitor.com >>>> >>>> >>>> On 14 January 2014 10:46, Mohit Anchlia <mohitanch...@gmail.com> wrote: >>>>> I am trying to understand why I should change it? This setting looks like >>>>> the right setting in most cases. Did you see anything out of ordinary in >>>>> that log message I pasted? >>>>> >>>>> On Mon, Jan 13, 2014 at 3:40 PM, David Pilato <da...@pilato.fr> wrote: >>>>>> No it's not the default setting. >>>>>> min master node = total num of nodes / 2 + 1 >>>>>> >>>>>> You have 5 nodes, 5 / 2 + 1 = 3 >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> David Pilato | Technical Advocate | Elasticsearch.com >>>>>> @dadoonet | @elasticsearchfr >>>>>> >>>>>> >>>>>> Le 14 janvier 2014 at 00:06:34, Mohit Anchlia (mohitanch...@gmail.com) a >>>>>> écrit: >>>>>> >>>>>>> Is the default setting 3? How do I go about selecting right >>>>>>> configuration setting for this property? >>>>>>> >>>>>>> On Mon, Jan 13, 2014 at 3:01 PM, David Pilato <da...@pilato.fr> wrote: >>>>>>>> So I think you should first set minimum master node to 3. See >>>>>>>> http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/cluster-update-settings.html#_discovery >>>>>>>> >>>>>>>> Probably you need to close your isolated node and restart it. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>>> David Pilato | Technical Advocate | Elasticsearch.com >>>>>>>> @dadoonet | @elasticsearchfr >>>>>>>> >>>>>>>> >>>>>>>> Le 13 janvier 2014 at 23:58:33, Mohit Anchlia (mohitanch...@gmail.com) >>>>>>>> a écrit: >>>>>>>> >>>>>>>>> I have 5 nodes. I am using all the default settings. >>>>>>>>> >>>>>>>>> On Mon, Jan 13, 2014 at 2:32 PM, David Pilato <da...@pilato.fr> wrote: >>>>>>>>>> It sounds like a split brain issue or something. >>>>>>>>>> >>>>>>>>>> How many nodes do you have? >>>>>>>>>> Did you set minimum master node? >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> David Pilato | Technical Advocate | Elasticsearch.com >>>>>>>>>> @dadoonet | @elasticsearchfr >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> Le 13 janvier 2014 at 22:48:32, Mohit Anchlia >>>>>>>>>> (mohitanch...@gmail.com) a écrit: >>>>>>>>>> >>>>>>>>>>> Thanks! It looks like one of the nodes even though it was up still >>>>>>>>>>> it went out of cluster. Is there no retry? >>>>>>>>>>> >>>>>>>>>>> [2014-01-02 17:55:01,148][INFO ][cluster.service ] [10.80.140.14] >>>>>>>>>>> master {new >>>>>>>>>>> [10.80.140.14][267foffDRhO6zzXlHg3YKA][inet[/10.80.140.14:9300]]{group=group1}, >>>>>>>>>>> previous >>>>>>>>>>> [10.80.140.59][YDHawZWnRUKukXDIIT5MJQ][inet[/10.80.140.59:9300]]{group=group2}}, >>>>>>>>>>> removed >>>>>>>>>>> {[10.80.140.59][YDHawZWnRUKukXDIIT5MJQ][inet[/10.80.140.59:9300]]{group=group2},}, >>>>>>>>>>> reason: zen-disco-master_failed >>>>>>>>>>> ([10.80.140.59][YDHawZWnRUKukXDIIT5MJQ][inet[/10.80.140.59:9300]]{group=group2}) >>>>>>>>>>> >>>>>>>>>>> [2014-01-02 17:55:02,158][INFO ][cluster.service ] [10.80.140.14] >>>>>>>>>>> removed >>>>>>>>>>> {[10.80.140.13][6cf39fcASKSn6dNNsSXguA][inet[/10.80.140.13:9300]]{group=group2},}, >>>>>>>>>>> reason: >>>>>>>>>>> zen-disco-node_failed([10.80.140.13][6cf39fcASKSn6dNNsSXguA][inet[/10.80.140.13:9300]]{group=group2}), >>>>>>>>>>> reason failed to ping, tried [3] times, each with maximum [30s] >>>>>>>>>>> timeout >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> On Mon, Jan 13, 2014 at 1:34 PM, David Pilato <da...@pilato.fr> >>>>>>>>>>> wrote: >>>>>>>>>>>> Yellow means that some replicas are not allocated. >>>>>>>>>>>> If you have only one node and have index set with one replica >>>>>>>>>>>> (default), yellow is the expected state. >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> -- >>>>>>>>>>>> David Pilato | Technical Advocate | Elasticsearch.com >>>>>>>>>>>> @dadoonet | @elasticsearchfr >>>>>>>>>>>> >>>>>>>>>>>> >>>>>>>>>>>> Le 13 janvier 2014 at 22:30:23, Mohit Anchlia >>>>>>>>>>>> (mohitanch...@gmail.com) a écrit: >>>>>>>>>>>> >>>>>>>>>>>>> Cluster state is showing yellow. What's the best way to find why >>>>>>>>>>>>> it's in yellow state? >>>>>>>>>>>>> >>>>>>>>>>>>> It has been up and stable so far except when I looked today it >>>>>>>>>>>>> shows state turned into yellow. >>>>>>>>>>>>> -- >>>>>>>>>>>>> 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+unsubscr...@googlegroups.com. >>>>>>>>>>>>> To view this discussion on the web visit >>>>>>>>>>>>> https://groups.google.com/d/msgid/elasticsearch/CAOT3TWpSSEVTpYA-DB8Hgfyo9WdR4bVRoKtQ9c_PC%2BFZ1aQiKg%40mail.gmail.com. >>>>>>>>>>>>> For more options, visit 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+unsubscr...@googlegroups.com. >>>>>>>>>>>> To view this discussion on the web visit >>>>>>>>>>>> https://groups.google.com/d/msgid/elasticsearch/etPan.52d45be9.7c3dbd3d.376c%40MacBook-Air-de-David.local. >>>>>>>>>>>> >>>>>>>>>>>> For more options, visit 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+unsubscr...@googlegroups.com. >>>>>>>>>>> To view this discussion on the web visit >>>>>>>>>>> https://groups.google.com/d/msgid/elasticsearch/CAOT3TWpLn_AgMKcTwQuGD-CHHe6ptg%3DRxaNGLPxFn3kroed%3DVQ%40mail.gmail.com. >>>>>>>>>>> >>>>>>>>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>>>>>>> >>>>>>>>>> -- >>>>>>>>>> You received this message because you are 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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+unsubscr...@googlegroups.com. >>>>>>>> To view this discussion on the web visit >>>>>>>> https://groups.google.com/d/msgid/elasticsearch/etPan.52d47036.77465f01.376c%40MacBook-Air-de-David.local. >>>>>>>> >>>>>>>> For more options, visit 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+unsubscr...@googlegroups.com. >>>>>>> To view this discussion on the web visit >>>>>>> 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discussion on the web visit >>>>> https://groups.google.com/d/msgid/elasticsearch/CAOT3TWqx_KLF_p8nJ4m3On-nSvRncY9OdHa8KS1HDjcRHhfQhQ%40mail.gmail.com. >>>>> >>>>> For more options, visit 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+unsubscr...@googlegroups.com. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/elasticsearch/CAEM624aGEw8HqnMP--Fb-U%2BCjB58VBFb1bQenk_RmenNKAmMHg%40mail.gmail.com. >>>> >>>> For more options, visit 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+unsubscr...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/elasticsearch/CAOT3TWrGJOS4%2BA6bm%3DKLm7aTDoQxX8TZGM7CgxVoGAeO%3D-XNLA%40mail.gmail.com. >>> >>> For more options, visit 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+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/elasticsearch/CAEM624Z-OGv6nJpwB6OyNjX1wf%3Dk1n9J7BrB_M33X8dYkLVSYw%40mail.gmail.com. >> >> For more options, visit 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+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/CAOT3TWqhKdSvYLs%3Dy6eVzLjEfbYZa8z8Nj_ftEGt6u0yQmQkFg%40mail.gmail.com. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. 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