[rescue] A Question about Snap Servers

Phil Stracchino alaric at caerllewys.net
Sat Jul 31 16:15:36 CDT 2004

On Sat, Jul 31, 2004 at 01:56:41PM -0500, Jonathan C. Patschke wrote:
> On Sat, 31 Jul 2004, bitrot wrote:
> >does anyone have a nice SIMPLE way of setting up raid 1
> >on solaris 9.
> 1) Create a tiny (10MB or 20MB) slice (I'll call this an mslice) on
>    each disk for the metadb and a big slice on each disk to hold your
>    data (I'll call this a dslice).
> 2) Do metadb -a -f mslice1 mslice2 mslice3   # You really need three tiny
>                                              # slices.

More is better.  Three is the *minimum*.

I quote:

            ... The majority consensus algorithm accounts for the
     following: the system will stay running with exactly half or
     more replicas; the system will panic when less than half the
     replicas are available; the system will not  reboot  without
     one more than half the total replicas.

In other words, three is the minimum number of metadb replicas with
which it remains possible to boot the system after losing a replica.

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