[kepler-dev] what's the CHANNEL in kepler

[陈军]

Since there‘s so many repeated values in the channel field, I guess channel
is unique between ports, but not unique in the large?


2014-07-31 23:07 GMT+08:00 Matt Jones <jones at nceas.ucsb.edu>:

> Channels are the connections between ports.  A multiport can have multiple
> channels attached, which are numbered starting at 0. So the database field
> holds those values.
>
> Matt
> On Jul 31, 2014 8:01 AM, "陈军" <jam.chenjun at gmail.com> wrote:
>
>> hi,
>>
>> "
>> https://kepler-project.org/developers/interest-groups/provenance-interest-group/interfaces-to-provenance-for-reap/?searchterm=schema
>> "
>> In this web page, there is the provenance database schema. In the
>> *port_event* table, there is a field *channel*.
>>
>> "
>> https://code.kepler-project.org/code/kepler/trunk/modules/provenance/docs/provenance.pdf
>> "
>> In this document, there is an explanation. "A port event occurred at
>> *time*, on port *port_id*, and on *channel* from actor firing *fire_id*."
>>
>> I thought channel means that data flow path between actors.
>> But after I execute several different workflows and record the provenance
>> data and check the hsql provenance. I find that in the 48 lists of
>> *port_event* row, 47 lists of the *channel* field is 0, and the rest
>> list of the *channel* field is 1. Seems that my thought wrong.
>>
>> So what's the channel in kepler provenance?
>> (Maybe channel is used by the underlying ptolemy sending tokens, but not
>> utilized by the kepler provenance module?)
>>
>> --
>> 陈军
>> School of Computer Science , Fudan University
>>
>> _______________________________________________
>> Kepler-dev mailing list
>> Kepler-dev at kepler-project.org
>> http://lists.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-dev
>>
>>


-- 
陈军
School of Computer Science , Fudan University
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.nceas.ucsb.edu/kepler/pipermail/kepler-dev/attachments/20140801/6c78a76a/attachment.html>