# Upgrading from very old version of ES with zero down time
**URL:** https://discuss.elastic.co/t/upgrading-from-very-old-version-of-es-with-zero-down-time/20034
**Category:** Elasticsearch
**Created:** [October 2, 2014, 12:28am UTC](https://discuss.elastic.co/t/upgrading-from-very-old-version-of-es-with-zero-down-time/20034 "2014-10-02T00:28:02Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Eugene\_Strokin](https://discuss.elastic.co/u/Eugene_Strokin)
#### Post date: [October 2, 2014, 12:28am UTC](https://discuss.elastic.co/t/upgrading-from-very-old-version-of-es-with-zero-down-time/20034/1 "2014-10-02T00:28:02Z")
Hello,
my ES cluster is still running version 0.20.1. It is time to upgrade. I
know I cannot just use indexes as is and replace the jars by the newest ES.
They are not compatible as far as I understood.
So I need to set up a parallel cluster with the newest ES and some how
transfer all the data with zero down time. The size of the indexes is about
100Gb and the traffic is relatively big, so it could take some time, and
somehow I need to keep the clusters in sync.
Did someone had such experience?
Does someone have any suggestions how to approach this?
I cannot come up with some elegant solution.
Any help is greatly appreciated.
Thank you,
Eugene
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### Author:  [@Adrian\_Luna](https://discuss.elastic.co/u/Adrian_Luna)
#### Post date: [October 2, 2014, 10:26am UTC](https://discuss.elastic.co/t/upgrading-from-very-old-version-of-es-with-zero-down-time/20034/2 "2014-10-02T10:26:16Z")
I would just start another node (or a couple of nodes for security reasons,
mantaining replicas in different machines, etc.) in your cluster with the
new ES version, wait untill data gets copied, turn off every deprecated
(old) version of ES and then restart the nodes you turned-off with after
updating its version.
Alternatively, you can also do something similar to this:
> **[Elasticsearch Platform — Find real-time answers at scale](https://www.elastic.co)**
>
> Power insights and outcomes with the Elasticsearch Platform and AI. See into your data and find answers that matter with enterprise solutions designed to help you build, observe, and protect. Try Elasticsearch free today.
Hope some of this helps.
El jueves, 2 de octubre de 2014 02:28:02 UTC+2, Eugene Strokin escribió:
> Hello,
> my ES cluster is still running version 0.20.1. It is time to upgrade. I
> know I cannot just use indexes as is and replace the jars by the newest ES.
> They are not compatible as far as I understood.
> So I need to set up a parallel cluster with the newest ES and some how
> transfer all the data with zero down time. The size of the indexes is about
> 100Gb and the traffic is relatively big, so it could take some time, and
> somehow I need to keep the clusters in sync.
> Did someone had such experience?
> Does someone have any suggestions how to approach this?
> I cannot come up with some elegant solution.
> Any help is greatly appreciated.
> Thank you,
> Eugene
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### Author:  [@jprante](https://discuss.elastic.co/u/jprante)
#### Post date: [October 2, 2014, 10:42am UTC](https://discuss.elastic.co/t/upgrading-from-very-old-version-of-es-with-zero-down-time/20034/3 "2014-10-02T10:42:07Z")
If you wish, I can prepare a knapsack backport for 0.20, then you can dump
all your data into an archive file, and reimport the archive into a higher
version.
Jörg
On Thu, Oct 2, 2014 at 2:28 AM, Eugene Strokin [eugene@strokin.info](mailto:eugene@strokin.info) wrote:
> Hello,
> my ES cluster is still running version 0.20.1. It is time to upgrade. I
> know I cannot just use indexes as is and replace the jars by the newest ES.
> They are not compatible as far as I understood.
> So I need to set up a parallel cluster with the newest ES and some how
> transfer all the data with zero down time. The size of the indexes is about
> 100Gb and the traffic is relatively big, so it could take some time, and
> somehow I need to keep the clusters in sync.
> Did someone had such experience?
> Does someone have any suggestions how to approach this?
> I cannot come up with some elegant solution.
> Any help is greatly appreciated.
> Thank you,
> Eugene
>
> --
> You received this message because you are subscribed to the Google Groups
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> [https://groups.google.com/d/msgid/elasticsearch/187ebef9-d1ce-436f-8986-c355c853b622%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/187ebef9-d1ce-436f-8986-c355c853b622%40googlegroups.com?utm_medium=email&utm_source=footer)
> .
> For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
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---
### Author:  [@jprante](https://discuss.elastic.co/u/jprante)
#### Post date: [October 2, 2014, 2:57pm UTC](https://discuss.elastic.co/t/upgrading-from-very-old-version-of-es-with-zero-down-time/20034/4 "2014-10-02T14:57:28Z")
FYI I have prepared Knapsack plugin for Elasticsearch 0.20.6
> **[GitHub - jprante/elasticsearch-knapsack: Knapsack plugin is an import/export...](https://github.com/jprante/elasticsearch-knapsack)**
>
> Knapsack plugin is an import/export tool for Elasticsearch - GitHub - jprante/elasticsearch-knapsack: Knapsack plugin is an import/export tool for Elasticsearch
Source code tag:
> **[Release 0.20.6.2 · jprante/elasticsearch-knapsack](https://github.com/jprante/elasticsearch-knapsack/releases/tag/0.20.6.2)**
>
> 0.20.6.2
Link of Plugin ZIP for 0.20.6.2:
[http://xbib.org/repository/org/xbib/elasticsearch/plugin/elasticsearch-knapsack/0.20.6.2/elasticsearch-knapsack-0.20.6.2-plugin.zip](http://xbib.org/repository/org/xbib/elasticsearch/plugin/elasticsearch-knapsack/0.20.6.2/elasticsearch-knapsack-0.20.6.2-plugin.zip)
Jörg
On Thu, Oct 2, 2014 at 12:42 PM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \<
[joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote:
> If you wish, I can prepare a knapsack backport for 0.20, then you can dump
> all your data into an archive file, and reimport the archive into a higher
> version.
>
> Jörg
>
> On Thu, Oct 2, 2014 at 2:28 AM, Eugene Strokin [eugene@strokin.info](mailto:eugene@strokin.info)
> wrote:
>
> > Hello,
> > my ES cluster is still running version 0.20.1. It is time to upgrade. I
> > know I cannot just use indexes as is and replace the jars by the newest ES.
> > They are not compatible as far as I understood.
> > So I need to set up a parallel cluster with the newest ES and some how
> > transfer all the data with zero down time. The size of the indexes is about
> > 100Gb and the traffic is relatively big, so it could take some time, and
> > somehow I need to keep the clusters in sync.
> > Did someone had such experience?
> > Does someone have any suggestions how to approach this?
> > I cannot come up with some elegant solution.
> > Any help is greatly appreciated.
> > Thank you,
> > Eugene
> >
> > --
> > 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/187ebef9-d1ce-436f-8986-c355c853b622%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/187ebef9-d1ce-436f-8986-c355c853b622%40googlegroups.com)
> > [https://groups.google.com/d/msgid/elasticsearch/187ebef9-d1ce-436f-8986-c355c853b622%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/187ebef9-d1ce-436f-8986-c355c853b622%40googlegroups.com?utm_medium=email&utm_source=footer)
> > .
> > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
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---
### Author:  [@Ivan](https://discuss.elastic.co/u/Ivan)
#### Post date: [October 2, 2014, 11:38pm UTC](https://discuss.elastic.co/t/upgrading-from-very-old-version-of-es-with-zero-down-time/20034/5 "2014-10-02T23:38:15Z")
Your indices should be fine as is. Lucene is guaranteed to be able to read
data from 1 major revision prior. Elasticsearch 0.20 is Lucene 3 and the
latest Elasticsearch is Lucene 4. Because of various bugs at the Lucene
level, you should run an optimize (normally discouraged) to upgrade the
indices within Lucene.
Can you hold off indexing new content during the transition? If you want
zero downtime, it is essential. Also, what type of client are you using?
Although the Java transport client is the most flexible, it can be an issue
for zero downtime upgrades (with versions prior to 1.0).
If you can wait a little longer, I would hold off for Elasticsearch 1.4,
which is currently in beta. I think it would be the biggest release since
1.0.
Cheers,
Ivan
On Thu, Oct 2, 2014 at 7:57 AM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \<[joergprante@gmail.com](mailto:joergprante@gmail.com)
> wrote:
> FYI I have prepared Knapsack plugin for Elasticsearch 0.20.6
>
> [https://github.com/jprante/elasticsearch-knapsack](https://github.com/jprante/elasticsearch-knapsack)
>
> Source code tag:
>
> [https://github.com/jprante/elasticsearch-knapsack/releases/tag/0.20.6.2](https://github.com/jprante/elasticsearch-knapsack/releases/tag/0.20.6.2)
>
> Link of Plugin ZIP for 0.20.6.2:
>
> [http://xbib.org/repository/org/xbib/elasticsearch/plugin/elasticsearch-knapsack/0.20.6.2/elasticsearch-knapsack-0.20.6.2-plugin.zip](http://xbib.org/repository/org/xbib/elasticsearch/plugin/elasticsearch-knapsack/0.20.6.2/elasticsearch-knapsack-0.20.6.2-plugin.zip)
>
> Jörg
>
> On Thu, Oct 2, 2014 at 12:42 PM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \<
> [joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote:
>
> > If you wish, I can prepare a knapsack backport for 0.20, then you can
> > dump all your data into an archive file, and reimport the archive into a
> > higher version.
> >
> > Jörg
> >
> > On Thu, Oct 2, 2014 at 2:28 AM, Eugene Strokin [eugene@strokin.info](mailto:eugene@strokin.info)
> > wrote:
> >
> > > Hello,
> > > my ES cluster is still running version 0.20.1. It is time to upgrade. I
> > > know I cannot just use indexes as is and replace the jars by the newest ES.
> > > They are not compatible as far as I understood.
> > > So I need to set up a parallel cluster with the newest ES and some how
> > > transfer all the data with zero down time. The size of the indexes is about
> > > 100Gb and the traffic is relatively big, so it could take some time, and
> > > somehow I need to keep the clusters in sync.
> > > Did someone had such experience?
> > > Does someone have any suggestions how to approach this?
> > > I cannot come up with some elegant solution.
> > > Any help is greatly appreciated.
> > > Thank you,
> > > Eugene
> > >
> > > --
> > > 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/187ebef9-d1ce-436f-8986-c355c853b622%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/187ebef9-d1ce-436f-8986-c355c853b622%40googlegroups.com)
> > > [https://groups.google.com/d/msgid/elasticsearch/187ebef9-d1ce-436f-8986-c355c853b622%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/187ebef9-d1ce-436f-8986-c355c853b622%40googlegroups.com?utm_medium=email&utm_source=footer)
> > > .
> > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
>
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> .
>
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 12:58am UTC](https://discuss.elastic.co/t/upgrading-from-very-old-version-of-es-with-zero-down-time/20034/6 "2017-07-06T00:58:31Z")