Hi Piraengu,
On 12 July 2012 08:37, piraengu <
pira...@gmail.com> wrote:
> Good Day everybody
>
> I'am a Computer Science Student in Switerland in the 3rd year and yesterday,
> I had a presentation about NoSQL, there I showed to the audience the
> different types in NoSQL.
>
> After the Presentation the team leader asked me how it is, to migrato the
> db's under various types.
> So i began to search something and all i found is this Community, and now i
> will asking you.
>
> All what i found is from RDBMS to NoSQL Systems, and if i'm right, there
> isn't a standard way to migrate between different types?
>
> Can I migrate from a, key-value store db, like dynamo, to a, document store
> db, like mongoDB?
as far as I know, there are no migration tools. I guess the approach
could be hard because the data are stored in various different styles.
E.g CouchDB is storing the data in JSON and MongDB has it's own format
callen BSON. So dumping like you could do from a MySQL to a PostgreSQL
Database is not possible. Furthermore it's not possible to dump to a
binary file like in PostgreSQL's pg_dump.
What you can do for sure is writing a script where you request the
data form one key-value store and pump the data into the other
key-value store. But remember, that there is no standard between the
databases at all. Every NoSQL database has it's own implementation for
receiving data, viewing data and so on. I guess it will be an
individual task for each migration from DB1 to DB2. On the other hand,
the data structures will be very simple as this is the fact for
key-value stores.
> Are there anywhere some tools that helps me or should i better write some
> scripts by my self?
>
> What should I observe if I want do that?
>
> I am not going to do that, it's just a question to educate me.
>
> Thanks for the Answers and the Information.
> Best Regards
> Piraengu
Cheers
Andy
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--
Andy Wenk
Hamburg - Germany
RockIt!
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+++ english version is coming +++
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