Experimental Physics and
Industrial Control System

Maren Purves <[email protected]> · Wed, 16 Jan 2008 11:56:14 -1000

Eric Norum wrote:

On Jan 16, 2008, at 2:19 PM, Maren Purves wrote:
Wondering why anyway.
Can't you just NFS mount the disk and write to it?
From e.g. a genSub?

The answer to your second question can be summed up in one word.
Performance.

ASYN provides a worker thread to do the I/O without forcing the record
processing thread to block.

Of course you could do all that yourself from the genSub, but why
reproduce that which ASYN already provides?

genSub was just an idea if you don't want to write device support
for files. We run cfitsio (an astronomical standard file writing
library) on some of our IOCs, and have been doing this since long
before asyn was invented (or at least before it became public)
- without genSubs.
Maren

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System