Async I/O on Solaris 2.5

Async I/O on Solaris 2.5

Post by Robert Anthon » Tue, 14 Jan 1997 04:00:00



How can I tell if Asynchronous I/O is implemented on a Solaris 2.5 box?

Any help will be greatly appreciated.

 
 
 

Async I/O on Solaris 2.5

Post by Brian S. Craigie - Unix SA - NEC - Scotla » Thu, 16 Jan 1997 04:00:00




Quote:> How can I tell if Asynchronous I/O is implemented on a Solaris 2.5 box?

> Any help will be greatly appreciated.

I'm not sure in what context you mean, but the following

set scsi_options=0x3d8

if put in /etc/system, will set asynchronous mode on the scsi buses, and may
incur a performance penalty in doing so.

(to switch synchronous mode back on,  make the value 0x3f8)

--

Best Regards,

Brian S. Craigie
Unix Sysadmin
NEC Semiconductors (UK) Ltd

< Of course I'm not speaking for my employer.  I'm not even speaking for me! >

 
 
 

Async I/O on Solaris 2.5

Post by Thomas Tornblo » Thu, 23 Jan 1997 04:00:00



> How can I tell if Asynchronous I/O is implemented on a Solaris 2.5 box?

> Any help will be greatly appreciated.

If you mean asynchronous file IO, check aioread aiowrite.

Thomas
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1. Async IO in Solaris 2.5

POSIX aio was not *removed* for 2.5, rather it never was present.

There's only Solaris 2.x aio (aioread/aiowrite) just like there was in
SunOS 4.x.

Solaris 2.6 does have POSIX AIO.

Casper
--
Expressed in this posting are my opinions.  They are in no way related
to opinions held by my employer, Sun Microsystems.
Statements on Sun products included here are not gospel and may
be fiction rather than truth.

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