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

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

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.

Demai

>
> 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


>> 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?
>>