Re: Dynamic Loading and Unloading of EPICS Device Support and Record.

[Ralph Lange <Ralph.Lange@bessy.de>]

 On 08.09.2010 10:50, Ernest L. Williams Jr. wrote:
> Marty Kraimer wrote:
> >   On 09/07/2010 04:44 PM, Andrew Johnson wrote:
> > > Hi Ernest,
> > >
> > > Alternatively start looking at Marty Kraimer's Java IOC which I 
> > > believe was
> > > designed to allow dynamic record creation and deletion.
> > >
> > > - Andrew
> > Yes dynamic creation and deletion is allowed on the javaIOC.
> >
> > Marty
> So, now the question is do we join the development for the C++ 
> implementation of the PVData and PVAccess or do we invest time into
> EPICS 3.x.

Ernest,

the C++ implementation of PVData and PVAccess will be exactly what its 
name suggests: an implementation of the data structures (PVData) and the 
network protocol (PVAccess).
There are no current plans to implement the database (PVEngine fka 
javaIOC) in C++. Instead, the C++ implementations will be accompanied by 
an interface layer to the existing V3 database and device support, so 
that existing V3 databases can be run in a V4 system.

>    We really want to have this functionality for uTCA.  We will first 
> look at the work done for the redundant IOC as Andrew suggested.
> Maybe, the least path of resistance with respect to time is to have 
> this functionality in EPICS 3.x?

A project which will require - as Andrew pointed out - an impressive lot 
of resources allocated to it, unless your time frame is measured in 
decades rather than months. ;-)

Cheers,
Ralph