Re: [Postgres-xc-developers] [HACKERS] [PG-XC] how to pass a value(String) from coordinator node to all data nodes

[Demai Ni <ni...@gm...>]

sorry if this message is a dup, previous one sent to postgres-xc-developers
was bounded back.


hi, Koichi,

thanks for your response. I am trying to connect to a hdfs system, and
reading hdfs files through FDW. Assuming I have 10 files mapping to one
foreign table, and have 3 datanode on PG-XC, I'd like coordinator node to
do some simple scheduling so that each dataNode of PG-XC will read roughtly
same amount of data. That is why I'd like to hook a value(a String will be
fine) that generated by coordinator node, and visible to every data node.
The string will be the same value for all datanodes.

Demai

On Tue, Nov 4, 2014 at 1:34 AM, Koichi Suzuki <koi...@gm...> wrote:

> Demai;
>
> Anyway, could you describe your point more specifically?   What would
> you do this in vanilla postgresql?  This will help to find how to do
> it in XC.
>
> Regards;
> ---
> Koichi Suzuki
>
>
> 2014-11-04 10:48 GMT+09:00 Amit Langote <ami...@gm...>:
> > Hi Demai,
> >
> > On Tue, Nov 4, 2014 at 10:40 AM, Demai Ni <ni...@gm...> wrote:
> >> hi, hackers,
> >>
> >> I am looking for a simple way to pass a value(ideally a hashtable, and
> use a
> >> string for easy implementation for now), that is generated by
> coordinator
> >> node, and pass it to all data nodes. Plans may be one approach, I am
> just
> >> wondering whether there is a simpler hook?
> >>
> >
> > Correct list for this question would be (added to 'cc'):
> >
> > pos...@li...
> >
> > Thanks,
> > Amit
> >
> >
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