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Subject: RE: Variable size frame
From: "Mark Rivers" <[email protected]>
To: <[email protected]>
Cc: [email protected]
Date: Wed, 4 Mar 2009 14:56:24 -0600
I don't know about the CAS server, but in an IOC I post the array data first and then the size.  The client waits for a monitor on the size, and then does a ca_get on the array.  Obviously this is not foolproof, depending on the rates of new data and latencies but in practice it works well for me.

________________________________

From: Bruno Coudoin [mailto:[email protected]]
Sent: Wed 3/4/2009 2:55 PM
To: Mark Rivers
Cc: Jeff Hill; [email protected]
Subject: RE: Variable size frame



Le mercredi 04 mars 2009 à 14:27 -0600, Mark Rivers a écrit :
> One simple way to do this, depending on the client, is to put the size in another PV.
>  Then the client can do a ca_get, requesting only that size.
>  That is what I am doing with the areaDetector software and an IDL client.
>   But generic clients like medm won't be able to handle that.

Then I would need to manage grouped commit to be sure the 2 PVs
represent the same data. I have not yet checked how to achieve this, is
this possible in a CAS server?

Bruno.







Replies:
RE: Variable size frame Bruno Coudoin
References:
Variable size frame Bruno Coudoin
RE: Variable size frame Jeff Hill
RE: Variable size frame Bruno Coudoin
RE: Variable size frame Mark Rivers
RE: Variable size frame Bruno Coudoin

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