# Knapsack use case
**URL:** https://discuss.elastic.co/t/knapsack-use-case/19000
**Category:** Elasticsearch
**Created:** [July 31, 2014, 9:05am UTC](https://discuss.elastic.co/t/knapsack-use-case/19000 "2014-07-31T09:05:29Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Matteo\_Moci](https://discuss.elastic.co/u/Matteo_Moci)
#### Post date: [July 31, 2014, 9:05am UTC](https://discuss.elastic.co/t/knapsack-use-case/19000/1 "2014-07-31T09:05:29Z")
Hi All,
I have some questions about the knapsack plugin [1].
My idea to use the tool to do a backup to a file, starting from a 0.90.x
instance and then restore it on a different 1.2.x or 1.3.x instance. I see
it can't be done directly, copying to a local/remote cluster.
Would it work doing an intermediate step with a file?
Or the backup still has metadata about the es version it was generated
from, making it impossible?
Is the snapshot and restore feature [2] useful in my use case, or not?
Is the knapsack plugin able to backup and restore also aliases and
mappings, or do I have to manually migrate them before restoring data?
Thanks for the patience and the great work!
Matteo
[1] [https://github.com/jprante/elasticsearch-knapsack](https://github.com/jprante/elasticsearch-knapsack)
[2]
[http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-snapshots.html](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-snapshots.html)
--
Matteo Moci
[http://mox.fm](http://mox.fm)
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### Author:  [@jprante](https://discuss.elastic.co/u/jprante)
#### Post date: [July 31, 2014, 9:33am UTC](https://discuss.elastic.co/t/knapsack-use-case/19000/2 "2014-07-31T09:33:08Z")
Snapshot/restore is always recommended, but is a 1.0 feature. This is a
standard API of ES and well supported by the ES team. With that, you can
handle all kinds of index data safely on a binary level, fully and
incrementally.
Knapsack plugin is for document export/import only. I wrote it to transport
\_source data harvested over a long time period from a \< 1.0 system to a
production system. It works on \_source or stored fields only. It uses
search/query and bulk indexing API without snapshots, so it is up to the
admin to stop index writes while knapsack runs. There is also a lookup of
index settings and mappings, this information is also included in the
export archive file, and re-applied at import time. But, there is no check
if these settings/mappings can be applied on the target successfully, this
is left to the admin to prepare plugins, analyzers, etc. Aliases are not
transported but this is a good idea for improvement.
Currently, knapsack plugin does not work on ES 1.3 but I am progressing to
implement this. I am adding a Java-level API. Currently it is REST only.
Jörg
On Thu, Jul 31, 2014 at 11:05 AM, Matteo Moci [mox601@gmail.com](mailto:mox601@gmail.com) wrote:
> Hi All,
> I have some questions about the knapsack plugin [1].
>
> My idea to use the tool to do a backup to a file, starting from a 0.90.x
> instance and then restore it on a different 1.2.x or 1.3.x instance. I see
> it can't be done directly, copying to a local/remote cluster.
>
> Would it work doing an intermediate step with a file?
> Or the backup still has metadata about the es version it was generated
> from, making it impossible?
>
> Is the snapshot and restore feature [2] useful in my use case, or not?
>
> Is the knapsack plugin able to backup and restore also aliases and
> mappings, or do I have to manually migrate them before restoring data?
>
> Thanks for the patience and the great work!
> Matteo
>
> [1] [GitHub - jprante/elasticsearch-knapsack: Knapsack plugin is an import/export tool for Elasticsearch](https://github.com/jprante/elasticsearch-knapsack)
> [2]
> [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-snapshots.html)
>
> --
> Matteo Moci
> [http://mox.fm](http://mox.fm)
>
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> [https://groups.google.com/d/msgid/elasticsearch/CAONgFZ60jWViqzRVO6\_U-rYo6dUzunE3ojv%2BR5U8HX1Lwp4PdA%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CAONgFZ60jWViqzRVO6_U-rYo6dUzunE3ojv%2BR5U8HX1Lwp4PdA%40mail.gmail.com?utm_medium=email&utm_source=footer)
> .
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---
### Author:  [@Matteo\_Moci](https://discuss.elastic.co/u/Matteo_Moci)
#### Post date: [January 19, 2015, 2:27pm UTC](https://discuss.elastic.co/t/knapsack-use-case/19000/3 "2015-01-19T14:27:34Z")
…just a small update in case anyone was wondering:
I completed an elasticsearch-knapsack export to file from a 0.90.7 (with
the plugin built with 0.90.7 dependencies) that was correctly re-imported
in a 1.4.2 instance with the latest plugin version, including settings and
aliases.
I just checked out the source from github and changed 2-3 lines due to API
changes and assembled the plugin to be installed on a 0.90.7 instance.
Just wanted to say thanks!
Best,
Matteo
On Thu, Jul 31, 2014 at 11:33 AM, [joergprante@gmail.com](mailto:joergprante@gmail.com) \<
[joergprante@gmail.com](mailto:joergprante@gmail.com)\> wrote:
> Snapshot/restore is always recommended, but is a 1.0 feature. This is a
> standard API of ES and well supported by the ES team. With that, you can
> handle all kinds of index data safely on a binary level, fully and
> incrementally.
>
> Knapsack plugin is for document export/import only. I wrote it to
> transport \_source data harvested over a long time period from a \< 1.0
> system to a production system. It works on \_source or stored fields only.
> It uses search/query and bulk indexing API without snapshots, so it is up
> to the admin to stop index writes while knapsack runs. There is also a
> lookup of index settings and mappings, this information is also included in
> the export archive file, and re-applied at import time. But, there is no
> check if these settings/mappings can be applied on the target successfully,
> this is left to the admin to prepare plugins, analyzers, etc. Aliases are
> not transported but this is a good idea for improvement.
>
> Currently, knapsack plugin does not work on ES 1.3 but I am progressing to
> implement this. I am adding a Java-level API. Currently it is REST only.
>
> Jörg
>
> On Thu, Jul 31, 2014 at 11:05 AM, Matteo Moci [mox601@gmail.com](mailto:mox601@gmail.com) wrote:
>
> > Hi All,
> > I have some questions about the knapsack plugin [1].
> >
> > My idea to use the tool to do a backup to a file, starting from a 0.90.x
> > instance and then restore it on a different 1.2.x or 1.3.x instance. I see
> > it can't be done directly, copying to a local/remote cluster.
> >
> > Would it work doing an intermediate step with a file?
> > Or the backup still has metadata about the es version it was generated
> > from, making it impossible?
> >
> > Is the snapshot and restore feature [2] useful in my use case, or not?
> >
> > Is the knapsack plugin able to backup and restore also aliases and
> > mappings, or do I have to manually migrate them before restoring data?
> >
> > Thanks for the patience and the great work!
> > Matteo
> >
> > [1] [GitHub - jprante/elasticsearch-knapsack: Knapsack plugin is an import/export tool for Elasticsearch](https://github.com/jprante/elasticsearch-knapsack)
> > [2]
> > [Elasticsearch Platform — Find real-time answers at scale | Elastic](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/modules-snapshots.html)
> >
> > --
> > Matteo Moci
> > [http://mox.fm](http://mox.fm)
> >
> > --
> > 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/CAONgFZ60jWViqzRVO6\_U-rYo6dUzunE3ojv%2BR5U8HX1Lwp4PdA%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAONgFZ60jWViqzRVO6_U-rYo6dUzunE3ojv%2BR5U8HX1Lwp4PdA%40mail.gmail.com)
> > [https://groups.google.com/d/msgid/elasticsearch/CAONgFZ60jWViqzRVO6\_U-rYo6dUzunE3ojv%2BR5U8HX1Lwp4PdA%40mail.gmail.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/CAONgFZ60jWViqzRVO6_U-rYo6dUzunE3ojv%2BR5U8HX1Lwp4PdA%40mail.gmail.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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--
Matteo Moci
[http://mox.fm](http://mox.fm)
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 12:37am UTC](https://discuss.elastic.co/t/knapsack-use-case/19000/4 "2017-07-06T00:37:59Z")