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Subject: Re: large arrays native element count wrong with Channel Access in EPICS 3.14.12
From: Andrew Johnson <anj@aps.anl.gov>
To: "Jeff Hill" <johill@lanl.gov>
Cc: EPICS core-talk <core-talk@aps.anl.gov>
Date: Tue, 18 Jan 2011 11:08:27 -0600
Hi Jeff,

On Tuesday 18 January 2011 10:31:05 Jeff Hill wrote:
>
> PS: Andrew, FWIW and referencing the know problems page, it is actually
> possible to transfer large arrays w/o the patch. What doesn't work is
> communication of the native element count when the client connects.

Right, as long as your client library is 3.14.12 and you're using the dynamic 
array sizing feature (which is still rare since it's a new feature).  However 
I believe the client library clips all array get and subscription requests to 
the array's native element count (or maybe it rejects them if too large, I 
forget which), so I'm pretty sure that a client application using an older 
library version against an unpatched 3.14.12 IOC isn't going to be able to 
override the incorrect native count.  I haven't tried it though, so I might be 
wrong.

- Andrew
-- 
If a man is offered a fact which goes against his instincts, he will
scrutinize it closely, and unless the evidence is overwhelming, he will
refuse to believe it.  If, on the other hand, he is offered something
which affords a reason for acting in accordance to his instincts, he
will accept it even on the slightest evidence.  -- Bertrand Russell


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RE: large arrays native element count wrong with Channel Access in EPICS 3.14.12 Jeff Hill

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