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From Furkan KAMACI <furkankam...@gmail.com>
Subject Re: SolrCloud Leader Response Mechanism
Date Tue, 16 Apr 2013 22:33:09 GMT
Hi Otis;

You said:

"It can just do it because it knows where things are."

Does it learn it from Zookeeper?

2013/4/17 Otis Gospodnetic <otis.gospodnetic@gmail.com>

> If query comes to shard X on some node and this shard X is NOT a
> leader, but HAS data, it will just execute the query.  If it needs to
> query shards on other nodes, it will have the info about which shards
> to query and will just do that and aggregate the results.  It doesn't
> have to ask leader for permission, for info, etc.  It can just do it
> because it knows where things are.
>
> Otis
> --
> Solr & ElasticSearch Support
> http://sematext.com/
>
>
>
>
>
> On Tue, Apr 16, 2013 at 5:23 PM, Furkan KAMACI <furkankamaci@gmail.com>
> wrote:
> > Hi Mark;
> >
> > When I speak with proper terms I want to ask that: is there a data
> locality
> > of spatial locality (
> >
> http://www.roguewave.com/portals/0/products/threadspotter/docs/2011.2/manual_html_linux/manual_html/ch_intro_locality.html
> > - I mean if you have data on your machine, use it and don't search it
> > anywhere else, just search for remaining parts) at querying on a leader
> of
> > SolrCloud?
> >
> > 2013/4/16 Mark Miller <markrmiller@gmail.com>
> >
> >> Leaders don't have much to do with querying - the node that you query
> will
> >> determine what other nodes it has to query to search the whole index
> and do
> >> a scatter/gather for you. (Though in some cases that request can be
> proxied
> >> to another node)
> >>
> >> - Mark
> >>
> >> On Apr 16, 2013, at 7:48 AM, Furkan KAMACI <furkankamaci@gmail.com>
> wrote:
> >>
> >> > When a leader responses for a query, does it says that: "If I have the
> >> data
> >> > what I am looking for, I should build response with it, otherwise I
> >> should
> >> > find it anywhere. Because it may be long to search it?"
> >> > or
> >> > does it says I only index the data, I will tell it to other guys to
> build
> >> > up the response query?
> >>
> >>
>

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