[Info-vax] Volume Shadowing & Cluster Satellite

[Hans Vlems]

On 23 apr, 23:15, hel... at astro.multiCLOTHESvax.de (Phillip Helbig---
undress to reply) wrote:
> In article <r24g69-epd.... at news.sture.ch>, Paul Sture <p... at sture.ch>
> writes:
>
> > >>today I tried to fiddle around with volume shadowing on OpenVMS 7.3-2.
> > >>So far everything worked as expteced. The boot node's device changed
> > >>from DKA0: to DSA0:. But the satellites were unable to boot from the
> > >>"new" cluster system disk. I changed all references in
> > >>SYSTARTUP_VMS.COM, SYLOGICALS.COM and in LANCP. Satellites did boot,
> > >>entered the cluster but immediately afterwards before the beginning of
> > >>STARTUP.COM they reported:
> > >>    boot device is already mounted as a shadow set member
>
> > >>Thus, where else do I have to change the device name?
>
> > > Did you change the shadowing sysgen parameters (such as SHADOWING,
> > > SHADOW_SYS_DISK and SHADOW_SYS_UNIT) ?
>
> > And ensure that ALLOCLASS is set to an appropriate non-zero value.
>
> In MODPARAMS.DAT, I have
>
> AGEN$INCLUDE_PARAMS SYS$SYSTEM:AGEN$COMMON.DAT     !all nodes
> AGEN$INCLUDE_PARAMS SYS$SYSTEM:AGEN$BOOTSERVER.DAT !bootserver nodes
>
> You could add one for stuff just for satellites as well.  MODPARAMS.DAT
> itself otherwise contains stuff unique to the node in question or
> parameters which could be different on different nodes:
>
> ! standard stuff
> SCSNODE="LEEBIG"
> SCSSYSTEMID=1024+150
> ! cluster_config
> VOTES=1
> ! shadowing
> ALLOCLASS=150
> TAPE_ALLOCLASS=150
> ! system-disk shadowing
> SHADOW_SYS_UNIT=150
> PAGEFILE2_NAME="DISK$SWAPPAGE_150:[SYS150.SYSEXE]PAGEFILE2.SYS"
> MIN_PAGEFILE2_SIZE=528400
> SWAPFILE2_NAME="DISK$SWAPPAGE_150:[SYS150.SYSEXE]SWAPFILE2.SYS"
> MIN_SWAPFILE2_SIZE=18400
>
> Something I thought about once then carried out and which has saved me a
> lot of time: give every node a number, e.g. 150 in the example above.
> SCSSYSTEMID=1024+150, IP-address: 192.168.1.150, ALLOCLASS=150,
> TAPE_ALLOCLASS=150, SHADOW_SYS_UNIT=150, the system boots from SYS150 (I
> know its not decimal; the idea is to have numbers easy and obvious to
> me).  You could even put 150 in the name.

In which case you could even do better:

ALLOCLASS=150

and subsequently:

SCSSYSTEMID=1024+ALLOCLASS
TAPE_ALLOCLASS=ALLOCLASS
SHADOW_SYS_UNIT=ALLOCLASS
etc.

Hans