[lug] Convert swap from raid0 to raid1

[Nate Duehr]

On Jul 25, 2007, at 11:03 PM, dio2002 at indra.com wrote:

> if others can chime in on this i'm more than willing to hear their
> thoughts.  i worried about the performance hit when i decided to go  
> that
> route but everything is a tradeoff.  availability versus  
> performance in
> this case.  if it's really going to degrade performance i imagine  
> i'd just
> can the mirroring on swap.

Or just set up two swap spaces and turn them both on.  The kernel  
will figure it out if one of them barfs... usually... at boot time  
anyway.  You might have issues during a live failure, but... then  
again, the kernel's pretty smart about such things.  You'd likely  
have a slew of errors in Ye Olde Logs, but a simple swapoff /path/to/ 
borked/swap/partition would cure it.  Or lock up the box!  (GRIN)

> which brings up a question. as it stands now, swap is raid 0.   
> which means
> that if one drive goes south when the system is booted, i believe that
> would prevent the system from coming up.  i'll pull my drive and check
> that in a second.

Probably bad juju, yeah.

--
Nate Duehr
nate at natetech.com