Backup and Restore an index


(Sagar Shah) #1

Hello everyone,
I am using elastic search 1.4.2 and trying to work out a way on back up and
restore operation of an index.

Objective:
An index is already present on a system with some mapping. During system
upgrade, mapping needs to be updated, which is not possible easily in
elastic search without reindexing.

So here's one path that I have chosen.

  • Take backup of existing index on file system
  • Delete existing index
  • Create an index with same name but with new mapping
  • Restore the (backed up) index. - Issue: When restoring index here, it
    also overwrites mapping to previous state, the way it was defined on
    original index. Is there a way to restore only the data and not
    settings/mapping. Or is there a way to restore index explicitly with new
    mappings?

Other option that I see is to create restore into a new index and then
perform bulk indexing on original index name. But that seems too much to me
just to perform data backup and restore.

Index is expected to have about 80 millions of records

Is there a way to ease this process?

Appreciate your inputs & suggestions

Regards,
Sagar Shah

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(Mark Walkom) #2

Why not just use an alias, then you don't have to worry about conflicting
names.
Otherwise I have been having luck using LS 1.5 to reindex -

PS - We're moving to https://discuss.elastic.co/, please join us there for
any future discussions!

On 29 May 2015 at 03:09, Sagar Shah sagarshah1983@gmail.com wrote:

Hello everyone,
I am using elastic search 1.4.2 and trying to work out a way on back up
and restore operation of an index.

Objective:
An index is already present on a system with some mapping. During system
upgrade, mapping needs to be updated, which is not possible easily in
elastic search without reindexing.

So here's one path that I have chosen.

  • Take backup of existing index on file system
  • Delete existing index
  • Create an index with same name but with new mapping
  • Restore the (backed up) index. - Issue: When restoring index here, it
    also overwrites mapping to previous state, the way it was defined on
    original index. Is there a way to restore only the data and not
    settings/mapping. Or is there a way to restore index explicitly with new
    mappings?

Other option that I see is to create restore into a new index and then
perform bulk indexing on original index name. But that seems too much to me
just to perform data backup and restore.

Index is expected to have about 80 millions of records

Is there a way to ease this process?

Appreciate your inputs & suggestions

Regards,
Sagar Shah

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(system) #3