# Snapshot and zone **URL:** \ **Category:** Elasticsearch\ **Created:** [March 13, 2015, 12:31am UTC](https://discuss.elastic.co/t/snapshot-and-zone/22649 "2015-03-13T00:31:55Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Foobar\_Geez](https://avatars.discourse-cdn.com/v4/letter/f/ecccb3/32.png) [@Foobar\_Geez](https://discuss.elastic.co/u/Foobar_Geez)\ **Post date:** [March 13, 2015, 12:31am UTC](https://discuss.elastic.co/t/snapshot-and-zone/22649/1 "2015-03-13T00:31:55Z")
Hello, We use one ES cluster with 4 nodes spread across 2 data centers (2 nodes/DC). Each DC is configured as a zone (via cluster.routing.allocation.awareness.attributes). I would like to use snapshot to backup indexes using type:fs. Per [http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-snapshots.html](http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-snapshots.html), the requirement is to have a location that is accessible on all data and master nodes. Unfortunately, I don't have a location that is accessible from both DCs (cross-mounts across DCs is not supported). Is there a way to backup indexes in a given DC/zone, especially given that all the primary and replica shards are available in a DC anyway? Thanks in advance! -- 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). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**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:** [March 13, 2015, 4:03am UTC](https://discuss.elastic.co/t/snapshot-and-zone/22649/2 "2015-03-13T04:03:51Z")
Just use a local mount point, as long as the path is the same it doesn't matter. Also, we do not recommend cross DC clusters, there is a lot of potential issues you can run into. On 12 March 2015 at 17:31, Foobar Geez [foobargeez@gmail.com](mailto:foobargeez@gmail.com) wrote: > Hello, > We use one ES cluster with 4 nodes spread across 2 data centers (2 > nodes/DC). Each DC is configured as a zone > (via cluster.routing.allocation.awareness.attributes). > > I would like to use snapshot to backup indexes using type:fs. Per > [Snapshot module | Elasticsearch Guide [8.11] | Elastic](http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-snapshots.html), > the requirement is to have a location that is accessible on all data and > master nodes. Unfortunately, I don't have a location that is accessible > from both DCs (cross-mounts across DCs is not supported). > > Is there a way to backup indexes in a given DC/zone, especially given that > all the primary and replica shards are available in a DC anyway? > > Thanks in advance! > > -- > 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). > To view this discussion on the web visit > [https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com) > [https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com?utm_medium=email&utm_source=footer) > . > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- 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). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAEYi1X-Qm4Dz%3D\_gBtkkgRTrgCNAiVw531ZsB8RYNEx9HHpbCaA%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAEYi1X-Qm4Dz%3D_gBtkkgRTrgCNAiVw531ZsB8RYNEx9HHpbCaA%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**Author:** ![Foobar\_Geez](https://avatars.discourse-cdn.com/v4/letter/f/ecccb3/32.png) [@Foobar\_Geez](https://discuss.elastic.co/u/Foobar_Geez)\ **Post date:** [March 13, 2015, 11:57am UTC](https://discuss.elastic.co/t/snapshot-and-zone/22649/3 "2015-03-13T11:57:42Z")
Thanks. I tried using a local mount point and I have backup created on all 4 nodes because the primary shards are spread across all nodes. I am guessing that I need all 4 nodes online whenever I need to, for e.g., restore a snapshot. The latency between the DCs is \<2ms, so for all practical reasons, we often don't distinguish the DCs. Other than the latency, what other stuff that I should be concerned about w.r.to ES cluster spread across DCs? On Friday, March 13, 2015 at 12:04:23 AM UTC-4, Mark Walkom wrote: > Just use a local mount point, as long as the path is the same it doesn't > matter. > > Also, we do not recommend cross DC clusters, there is a lot of potential > issues you can run into. > > On 12 March 2015 at 17:31, Foobar Geez \<[fooba...@gmail.com](mailto:fooba...@gmail.com) \\> > wrote: > > > Hello, > > We use one ES cluster with 4 nodes spread across 2 data centers (2 > > nodes/DC). Each DC is configured as a zone > > (via cluster.routing.allocation.awareness.attributes). > > > > I would like to use snapshot to backup indexes using type:fs. Per > > [Snapshot module | Elasticsearch Guide [8.11] | Elastic](http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-snapshots.html), > > the requirement is to have a location that is accessible on all data and > > master nodes. Unfortunately, I don't have a location that is accessible > > from both DCs (cross-mounts across DCs is not supported). > > > > Is there a way to backup indexes in a given DC/zone, especially given > > that all the primary and replica shards are available in a DC anyway? > > > > Thanks in advance! > > > > -- > > 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 [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com) \. > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com) > > [https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com?utm_medium=email&utm_source=footer) > > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- 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). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/ecc73285-dfc5-493e-b113-d9dca1b70228%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/ecc73285-dfc5-493e-b113-d9dca1b70228%40googlegroups.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**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:** [March 13, 2015, 7:11pm UTC](https://discuss.elastic.co/t/snapshot-and-zone/22649/4 "2015-03-13T19:11:34Z")
The core issue is latency. The second one is that if your link drops then chances are you will end up with a split brain, unless you have set min masters correctly, or a completely inaccessible cluster. On 13 March 2015 at 04:57, Foobar Geez [foobargeez@gmail.com](mailto:foobargeez@gmail.com) wrote: > Thanks. I tried using a local mount point and I have backup created on > all 4 nodes because the primary shards are spread across all nodes. I am > guessing that I need all 4 nodes online whenever I need to, for e.g., > restore a snapshot. > > The latency between the DCs is \<2ms, so for all practical reasons, we > often don't distinguish the DCs. Other than the latency, what other stuff > that I should be concerned about w.r.to ES cluster spread across DCs? > > On Friday, March 13, 2015 at 12:04:23 AM UTC-4, Mark Walkom wrote: > > > Just use a local mount point, as long as the path is the same it doesn't > > matter. > > > > Also, we do not recommend cross DC clusters, there is a lot of potential > > issues you can run into. > > > > On 12 March 2015 at 17:31, Foobar Geez [fooba...@gmail.com](mailto:fooba...@gmail.com) wrote: > > > > > Hello, > > > We use one ES cluster with 4 nodes spread across 2 data centers (2 > > > nodes/DC). Each DC is configured as a zone (via cluster.routing. > > > allocation.awareness.attributes). > > > > > > I would like to use snapshot to backup indexes using type:fs. Per > > > [Elasticsearch Guide | Elastic](http://www.elastic.co/guide/en/elasticsearch/reference/) > > > current/modules-snapshots.html, the requirement is to have a location > > > that is accessible on all data and master nodes. Unfortunately, I don't > > > have a location that is accessible from both DCs (cross-mounts across DCs > > > is not supported). > > > > > > Is there a way to backup indexes in a given DC/zone, especially given > > > that all the primary and replica shards are available in a DC anyway? > > > > > > Thanks in advance! > > > > > > -- > > > 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 [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com). > > > To view this discussion on the web visit [https://groups.google.com/d/](https://groups.google.com/d/) > > > msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19% > > > [40googlegroups.com](http://40googlegroups.com) > > > [https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/72d3b5e9-7afa-44a7-bbc8-7e4665636f19%40googlegroups.com?utm_medium=email&utm_source=footer) > > > . > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > > > -- > > 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). > > To view this discussion on the web visit > > [https://groups.google.com/d/msgid/elasticsearch/ecc73285-dfc5-493e-b113-d9dca1b70228%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/ecc73285-dfc5-493e-b113-d9dca1b70228%40googlegroups.com) > > [https://groups.google.com/d/msgid/elasticsearch/ecc73285-dfc5-493e-b113-d9dca1b70228%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/ecc73285-dfc5-493e-b113-d9dca1b70228%40googlegroups.com?utm_medium=email&utm_source=footer) > > . > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). -- 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). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/CAEYi1X8efjaONUziH-9pQ%2B32vGO1kwK6OZ08%3D4cNatSRUetLWQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAEYi1X8efjaONUziH-9pQ%2B32vGO1kwK6OZ08%3D4cNatSRUetLWQ%40mail.gmail.com). For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---
**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, 12:26am UTC](https://discuss.elastic.co/t/snapshot-and-zone/22649/5 "2017-07-06T00:26:53Z")