Neo4j Data Migration from 2.x to 3

[Lexia Fantasy]

Hi all,

I have a neo4j database which is currently running on 2.3.11. Now I am thinking of using the 3.x version. I am thinking of doing this

Take an online back up of data from neo4j 2.x then 

use import tool in 3.x to import the data and turn on db store migration on.

But my requirement is that since 3.x has native indexes. I would like to have only Nodes, Relationships and Labels in my 3.x instance and want to create the indexes and constraints I need after the migration

I did not see any option in the toolset which allows me to exclude indexes and constraints 

Could some one throw some light on how I can achieve this, may be like deleting some directories in the backup data or so or some other alternate approach for this migration

Regards

-George S

[Michael Hunger]

Hi George,

The indexes are migrated automatically.

If you already have schema indexes that will be taken care of.

Michael

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[Chris Vest]

Existing indexes are kept in Lucene on upgrade. If you want to switch to the native schema index implementation, you opt-in on a per index basis by dropping and recreating the relevant schema indexes.

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Chris Vest
System Engineer, Neo Technology

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[George & Sherin]

Thanks a lot Chris and Micheal.

I read that lucene indexes would be migrated. But I did not want to migrate any of the indexes but instead rebuild all the indexes to use natives where ever possible. 

All I am looking for is just to migrate the Nodes,Relationships and Labels and nothing else and for some time the system would run with no indexes (too slow) but we add indexes on be one as the system is up. 

Seems like there is no way to do that or my understanding is wrong. 

George S   

On Tue, Apr 3, 2018 at 7:46 AM, 'Chris Vest' via Neo4j <ne...@googlegroups.com> wrote:

Existing indexes are kept in Lucene on upgrade. If you want to switch to the native schema index implementation, you opt-in on a per index basis by dropping and recreating the relevant schema indexes.

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Chris Vest
System Engineer, Neo Technology

> On 3 Apr 2018, at 14.35, 'Michael Hunger' via Neo4j <ne...@googlegroups.com> wrote:
>
> Hi George,
>
> The indexes are migrated automatically.
>
> If you already have schema indexes that will be taken care of.
>
> Michael
>
> On Fri, Mar 30, 2018 at 3:14 PM, Lexia Fantasy <lexiaf...@gmail.com> wrote:
> Hi all,
>
> I have a neo4j database which is currently running on 2.3.11. Now I am thinking of using the 3.x version. I am thinking of doing this
>
> Take an online back up of data from neo4j 2.x then
> use import tool in 3.x to import the data and turn on db store migration on.
>
>
> But my requirement is that since 3.x has native indexes. I would like to have only Nodes, Relationships and Labels in my 3.x instance and want to create the indexes and constraints I need after the migration
>
>
> I did not see any option in the toolset which allows me to exclude indexes and constraints
> Could some one throw some light on how I can achieve this, may be like deleting some directories in the backup data or so or some other alternate approach for this migration
>
> Regards
> -George S
>
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> To unsubscribe from this group and stop receiving emails from it, send an email to neo4j+unsubscribe@googlegroups.com.

> For more options, visit https://groups.google.com/d/optout.
>
>
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[Siddhartha Sahu]

Hi George. How about exporting the data you want as csv files and importing them using the neo4j-import tool?

[George & Sherin]

Hi Siddharta,

That was one other option but seems like a lot more expensive affair was looking something cheaper like exclude indexes during the import. 

George S

On Tue, Apr 3, 2018 at 11:56 AM, Siddhartha Sahu <s3s...@uwaterloo.ca> wrote:

Hi George. How about exporting the data you want as csv files and importing them using the neo4j-import tool?

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