[Simh] RE : How to setup a simh VAX VMS cluster that handles more than 16 disks.

[Boucher, François]

This is part 2:
 

DISKS SERVING

VMS in a cluster supports disks when they are named differently.

Since you can have a cluster done with identical machines, their device names would be the same!  This situation would create a disk name <collision>!.

 

To avoid this, you have to modify the ALLOCLASS parameter in MODPARAMS.DAT to have a different number of ALLOCLASS for each node.  For example, the ALLOCLASS=1 will have disks of the node having a $1 prefix added for the disk device.  Also, on REGIE, an ALLOCLASS=3 will add the $3 prefix etc.

(define a different ALLOCLASS number for each node).

 

This is the output of the show devices disks:

$ sh dev d

 

Device                  Device           Error    Volume         Free  Trans Mnt

 Name                   Status           Count     Label        Blocks Count Cnt

$1$DUA0:       (EXTRA)  Mounted              0  XPL0           2441160   243   5

$1$DUA1:       (EXTRA)  Mounted              0  XPL1           4295256    18   5

$1$DUA2:       (EXTRA)  Mounted              0  XPL2           5632752     1   5

$1$DUA3:       (EXTRA)  Mounted              0  XPL3           4036900     1   5

$1$DUB0:       (EXTRA)  Mounted              0  XPL4           1259648     1   5

$1$DUB1:       (EXTRA)  Online               0

$1$DUB2:       (EXTRA)  Mounted              0  XPL5           2013312     1   5

$1$DUB3:       (EXTRA)  Mounted              0  XPL6           6165342     1   5

$1$DUC0:       (EXTRA)  Mounted              0  XPL7           6671736     6   5

$1$DUC1:       (EXTRA)  Mounted              0  XPL8           5454279     1   5

$1$DUC2:       (EXTRA)  Mounted              0  SIG0           2645090     1   5

$1$DUC3:       (EXTRA)  Mounted              0  SIG1           5908035     1   5

$1$DUD0:       (EXTRA)  Mounted              0  SIG2           3838992     1   5

$1$DUD1:       (EXTRA)  Mounted              0  SIG4           5871474     1   5

$1$DUD2:       (EXTRA)  Online               0

$1$DUD3:       (EXTRA)  Online               0

$1$DYA0:       (EXTRA)  Online               0

$1$DYA1:       (EXTRA)  Online               0

DAD0:          (EXTRA)  Online               0

$2$DUA0:       (LIVRE)  Online               0

$2$DUA1:       (LIVRE)  Online               0

$2$DUA2:       (LIVRE)  Online               0

$2$DUA3:       (LIVRE)  Online               0

$2$DUB0:       (LIVRE)  Online               0

$2$DUB1:       (LIVRE)  Online               0

$2$DUB2:       (LIVRE)  Online               0

$2$DUB3:       (LIVRE)  Online               0

$2$DUC0:       (LIVRE)  Online               0

$2$DUC1:       (LIVRE)  Online               0

$2$DUC2:       (LIVRE)  Online               0

$2$DUC3:       (LIVRE)  Online               0

$2$DUD0:       (LIVRE)  Online               0

$2$DUD1:       (LIVRE)  Online               0

$2$DUD2:       (LIVRE)  Online               0

$2$DUD3:       (LIVRE)  Online               0

$3$DUA0:       (REGIE)  Online               0

$3$DUA1:       (REGIE)  Mounted              0  GST0           4173048    64   5

$3$DUA2:       (REGIE)  Mounted              0  GST1           6213024     1   5

$3$DUA3:       (REGIE)  Mounted              0  GST2           5469030     1   5

$3$DUB0:       (REGIE)  Mounted              0  GST3           4879980    48   5

$3$DUB1:       (REGIE)  Mounted              0  GST4           6233724     1   5

$3$DUB2:       (REGIE)  Mounted              0  GST5           3617487     1   5

$3$DUB3:       (REGIE)  Mounted              0  GST6           4195881     1   5

$3$DUC0:       (REGIE)  Mounted              0  GST7           5242131     1   5

$3$DUC1:       (REGIE)  Mounted              0  GST8           4385223     1   5

$3$DUC2:       (REGIE)  Mounted              0  GST9           4715874     1   5

$3$DUC3:       (REGIE)  Mounted              0  GST10          5922117     1   5

$3$DUD0:       (REGIE)  Mounted              0  GST11          6777081     1   5

$3$DUD1:       (REGIE)  Mounted              0  GST12          6193552     1   5

$3$DUD2:       (REGIE)  Mounted              0  GST14          5283252     1   5

$3$DUD3:       (REGIE)  Mounted              0  GST15          6308424     1   5

$4$DUA0:       (AGENT)  Online               0

$4$DUA1:       (AGENT)  Online               0

$4$DUA2:       (AGENT)  Online               0

$4$DUA3:       (AGENT)  Online               0

$

 

So you can see I have numerous disks and can add a lot more in my cluster:

View of Cluster from system ID 1040  node: EXTRA           12-JAN-2008 08:55:35

+-------------------+---------+

|      SYSTEMS      | MEMBERS |

+--------+----------+---------+

|  NODE  | SOFTWARE |  STATUS |

+--------+----------+---------+

| EXTRA  | VMS V5.5 | MEMBER  |

| REGIE  | VMS V5.5 | MEMBER  |

| AGENT  | VMS V5.5 | MEMBER  |

| LIVRE  | VMS V5.5 | MEMBER  |

| CYCLE  | VMS V5.5 | MEMBER  |

+--------+----------+---------+

 

During the boot process of the satellite node, make it mount it's disks, then mount the disks of the boot node, then make it mount /cluster it's disks....

 

That should be it!

 

Best regards,

 

Francois Boucher ing.

Université du Québec à Montréal

 

-----Message d'origine-----


I have had trouble figuring out how to make SIMH VAX handle more than 16

drives as well as actually getting it to boot the imaged boot disk from the

cluster.

 

Could you PLEASE tell me how you are doing this on your system?

 

Thanks,

Rick Campbell

 

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