From: Green, Simon (SGreen@KRAFTEUROPE.COM)
Date: Mon Jul 29 2002 - 11:09:56 EDT
Way back when, (AIX 4.1?), mirrored paging spaces were not supported. That
is no longer the case.
If you are doing a lot of paging, then by mirroring hd6, rather than having
a separate paging space in its place on the other disk(s), you reduce the
number of disks that paging is spread over, which would affect performance.
However, if that's going to make a significant difference then your system
is already in pretty poor shape and you should get more memory, or more disk
space for extra paging spaces.
My own view is that if you're going to mirror the rootvg then it makes no
sense not to mirror hd6.
Simon Green
Philip Morris ITSC Europe
AIX-L Archive at http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2
AIX FAQ at http://www.faqs.org/faqs/aix-faq/
N.B. Unsolicited email from vendors will seldom be appreciated.
> -----Original Message-----
> From: Ron Schwingel [mailto:rschwing@NDSLTD.COM]
> Sent: 29 July 2002 16:00
> To: aix-l@Princeton.EDU
> Subject: Mirroring rootvg with the mirrorvg command
>
>
> When mirroring the rootvg VG, are there any issues with
> mirroring hd6 also.
> I know a few years ago one of our systems (59H) had some performance
> problems when doing this. I know without mirroring hd6, I
> will not be able
> to boot from the mirror drive, but I will still be able to use any
> additional
> paging spaces I created on the mirror drive until the primary
> is back in
> service, as long as I don't reboot (I could also change the
> default paging
> space).
>
> Is this only an issue on systems doing excessive paging and
> then only if
> using slower processors and disks?
This archive was generated by hypermail 2.1.7 : Wed Apr 09 2008 - 22:16:05 EDT