[illumos-Developer] dgroup.tab and friends

[Peter Tribble]

On Sun, Nov 14, 2010 at 6:23 PM, Andrew Gabriel
<illumos at cucumber.demon.co.uk> wrote:
> Garrett D'Amore wrote:
>>
>> I've recently been looking in some libraries (libadm, libpkg, etc.) and
>> ran across a bunch of code for managing dgroup.tab.  I was curious.. I
>> find some commands getdgrp, listdgrp, etc, which seem aimed at managing
>> something called "device groups".
>>
>> Searching online, I found some references to this stuff in man pages,
>> but I can't seem to find any actual examples of how this is used, or
>> evidence that it is even useful.
>>
>> Does anyone here have background information?
>
> It's related to Sun Cluster. I believe it's a group of devices (possibly
> just disks) which failover as one unit, but I'm not a Sun Cluster expert.

Hm, I suspect not. It's also present in SCO and AIX at least. This looks
like something somebody thought was a good idea for SVR4 rather than
something specific to sun cluster. Certainly the AIX implementation looks
like it's actually used and kept up to date, whereas the Solaris one looks
very stale.

-- 
-Peter Tribble
http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/