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<== Date ==> <== Thread ==>

Subject: RE: labCA and EPICS_CA_MAX_ARRAY_BYTES
From: "Mark Rivers" <rivers@cars.uchicago.edu>
To: <emmanuel_mayssat@lynceantech.com>, "Till Straumann" <strauman@slac.stanford.edu>
Cc: EPICS Tech-Talk <tech-talk@aps.anl.gov>
Date: Tue, 25 May 2010 17:31:39 -0500
No, there is no limit, just set EPICS_CA_MAX_ARRRAY_BYTES.  We are sending 16MB images over CA with no problem.
 
Amd 16K of doubles is not 1K values, it is 2K.  A double takes 8 bytes on every architecture I know of.
 
Mark
 

________________________________

From: tech-talk-bounces@aps.anl.gov on behalf of emmanuel_mayssat@lynceantech.com
Sent: Tue 5/25/2010 4:15 PM
To: Till Straumann
Cc: EPICS Tech-Talk
Subject: Re: labCA and EPICS_CA_MAX_ARRAY_BYTES



Is there still a limit on the length of arrays?
I understand that the client and ioc needs to be configured with
EPICS_CA_MAX_ARRAY_BYTES

Note that the number of bytes is not the numbers of values.
16K of double variables is only 1K values....

is this still a limitation in 3.14.11?
--
E

On 10:27 Tue 25 May     , Till Straumann wrote:
> On 05/25/2010 09:55 AM, John Dobbins wrote:
>> Is it possible to use labCA to retrieve arrays larger than 16K?
>>
>
> Yes - I routinely use that.
> You have to make sure EPICS_CA_MAX_ARRAY_BYTES is set
> in the environment *before* you start matlab or scilab (RTM).
>
> On the IOC, too, you need EPICS_CA_MAX_ARRAY_BYTES but
> since you tested with caget that's obviously set up correctly.




Replies:
Re: labCA and EPICS_CA_MAX_ARRAY_BYTES Till Straumann
References:
labCA and EPICS_CA_MAX_ARRAY_BYTES John Dobbins
Re: labCA and EPICS_CA_MAX_ARRAY_BYTES Till Straumann
Re: labCA and EPICS_CA_MAX_ARRAY_BYTES emmanuel_mayssat

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