Re: query ioc/cas for list of channels

[Jameson Graef Rollins <jrollins@ligo.caltech.edu>]

On Wed, Aug 21 2013, "J. Lewis Muir" <jlmuir@imca-cat.org> wrote:
> On 8/21/13 11:13 AM, Jameson Graef Rollins wrote:
>> Hi, folks.  Is there a way to query a channel access server (IOC,
>> portable CAS, etc.) for a list of all records it is serving?  I feel
>> like there should be a way, but I haven't been able to find any way to
>> do this yet.
>
> Hi, Jamie.
>
> Have you searched the mailing list archive?  I think the following
> thread would help you:
>
>   http://www.aps.anl.gov/epics/tech-talk/2012/msg02486.php

Hi, Lewis.  Thanks for the link.  I did a quick scan back through the
list, but it was clearly not sufficient!  This thread wasn't even from
that long ago :(

But it is indeed the same thing I was looking for.  And unfortunately it
sounds like there's good way to query a channel server for a list of its
records.

I must say I'm quite surprised to find out there's no method for doing
this.  It seems like a pretty obviously useful feature.

> Also note the difference between records and PVs.  Your subject field
> refers to channels (i.e. PVs), but your message body is asking for a
> list of records.  The two are different.  For each record, there are
> many possible PV names corresponding to the fields of the record.

Yes, sorry, that was maybe a little sloppy.  But I would settle for
either, actually, since there's obviously a lot of overlap.  The set of
records is just a subset of the set of PVs, and the additional fields in
the full set of PVs is predictable from the set of records.

jamie.

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