How to migrate index from 3.6 to 4.0 with solrcloud

[Zeng Lames <le...@gmail.com>]

Dear all,

we have an existing index with solr 3.6, and now we want to migrate it to
Solr4.0 with shard (2 shards, 2 nodes in a shard). The question are:

1.which node should i copy the existing index files to? any node in any
shard ?

2. if copy the index files into any one of nodes, can it be replicated to
the 'right' shard according hash code?

3. if above steps can't fulfill a index migrate to solrcloud, how should we
do?

thanks a lot
Lames

Re: How to migrate index from 3.6 to 4.0 with solrcloud

[Otis Gospodnetic <ot...@gmail.com>]

Hi,

I think you can't upgrade by copying, but I could be wrong. If I'm wrong a
write-up on the Wiki is probably needed.   If I had to migrate I would
reindex.

Otis
--
Performance Monitoring - http://sematext.com/spm
On Nov 1, 2012 9:34 PM, "Zeng Lames" <le...@gmail.com> wrote:

> Dear all,
>
> we have an existing index with solr 3.6, and now we want to migrate it to
> Solr4.0 with shard (2 shards, 2 nodes in a shard). The question are:
>
> 1.which node should i copy the existing index files to? any node in any
> shard ?
>
> 2. if copy the index files into any one of nodes, can it be replicated to
> the 'right' shard according hash code?
>
> 3. if above steps can't fulfill a index migrate to solrcloud, how should we
> do?
>
> thanks a lot
> Lames
>

Re: How to migrate index from 3.6 to 4.0 with solrcloud

[Zeng Lames <le...@gmail.com>]

thanks all for your prompt response. i think i know what should i do now.
thank you so much again.


On Fri, Nov 2, 2012 at 2:36 PM, Erick Erickson <er...@gmail.com>wrote:

> It's not clear whether your index is already sharded or not. But it doesn't
> matter because:
> 1> if it's not sharded, there's no shard-splitter (yet). So you can't copy
> the right parts of your single index to the right shard.
> 2> if your 3.6 index _is_ sharded already, I pretty much guarantee that it
> wasn't created with the same hashing algorithm that SolrCloud uses, so just
> copying the shards to some node on the cloud won't work.
>
> In either case, you'll have to re-indexing everything fresh.
>
> Best
> Erick
>
>
> On Thu, Nov 1, 2012 at 9:34 PM, Zeng Lames <le...@gmail.com> wrote:
>
> > Dear all,
> >
> > we have an existing index with solr 3.6, and now we want to migrate it to
> > Solr4.0 with shard (2 shards, 2 nodes in a shard). The question are:
> >
> > 1.which node should i copy the existing index files to? any node in any
> > shard ?
> >
> > 2. if copy the index files into any one of nodes, can it be replicated to
> > the 'right' shard according hash code?
> >
> > 3. if above steps can't fulfill a index migrate to solrcloud, how should
> we
> > do?
> >
> > thanks a lot
> > Lames
> >
>

Re: How to migrate index from 3.6 to 4.0 with solrcloud

[Erick Erickson <er...@gmail.com>]

It's not clear whether your index is already sharded or not. But it doesn't
matter because:
1> if it's not sharded, there's no shard-splitter (yet). So you can't copy
the right parts of your single index to the right shard.
2> if your 3.6 index _is_ sharded already, I pretty much guarantee that it
wasn't created with the same hashing algorithm that SolrCloud uses, so just
copying the shards to some node on the cloud won't work.

In either case, you'll have to re-indexing everything fresh.

Best
Erick


On Thu, Nov 1, 2012 at 9:34 PM, Zeng Lames <le...@gmail.com> wrote:

> Dear all,
>
> we have an existing index with solr 3.6, and now we want to migrate it to
> Solr4.0 with shard (2 shards, 2 nodes in a shard). The question are:
>
> 1.which node should i copy the existing index files to? any node in any
> shard ?
>
> 2. if copy the index files into any one of nodes, can it be replicated to
> the 'right' shard according hash code?
>
> 3. if above steps can't fulfill a index migrate to solrcloud, how should we
> do?
>
> thanks a lot
> Lames
>