Site information set but not displayed from DCL

[Malcolm Wade]

Just started upgrading one of my multisite clusters to use SAN drives which are available via a pair of EVA's connected to a dual fabric in two sites. Each fabric spans both sites via DWDM links.

Initially I presented local volumes for cross site shadowsets only but have now changed one pair of DGA devices (one at each site) to give all nodes in the cluster access to see hwo it performs before migrating all volumes.

I went through the SET DEVICE/SITE examples in HELP and set them accordingly but a show device/full on the DSA device or the DGA device doesn't show it's set.

I can see the information via ANAL/SYSTEM SHOW DEVICE DSA87: but not from DCL.

VMS version is OpenVMS V7.3-1. Please see attached file for SHOW DEVICE/FULL of the shadow set and example of the SITE logicals and commands.

[Lokesh_2]

Hi Malcom,

AFAIK, at present you can see the above information only through SDA (anal/system) . No DCL command or lexical can be used to display the site information. Hope, in future, we can see from DCL too !!...

Thanks & regards,
Lokesh

[John Gillings · Accepted solution]

Malcolm,
We keep telling you it's a good idea to upgrade :-)

OpenVMS V7.3-2 (note this will probably look really ugly when wrapped)

SHOW

SHADOW

Examples


1.$ SHOW SHADOW DSA716:

_DSA716: TST716
Virtual Unit SCB Status: 0001 - normal
Local Virtual Unit Status: 00000010 - Local Read

Total Devices 2 VU_UCB 810419C0
Source Members 2 SCB LBN 000009C8
Act Copy Target 0 Generation 00A15F90
Act Merge Target 0 Number EDA9D786
Last Read Index 0 VU Site Value 5
Master Mbr Index 0 VU Timeout Value 3600


Copy Hotblocks 0 Copy Collisions 0
SCP Merge Repair Cnt 0 APP Merge Repair Cnt 0

Device $252$DUA716 Master Member
Index 0 Status 000000A0 src,valid
Ext. Member Status 00
Read Cost 42 Site 5
Member Timeout 120 UCB 8116FF80

Device $252$DUA1010
Index 1 Status 000000A0 src,valid
Ext. Member Status 00
Read Cost 500 Site 3
Member Timeout 120 UCB 811DD500

This example displays status information for the shadow set on
virtual unit DSA716:.

Note that the VU Site Value is 5, and the site value for device
$252$DUA716 is also 5. Therefore, reads on this node will be

read from the $252$DUA716 device.

[Lokesh_2]

Hi John,

Great !! Thanks for the information.

Best regards,
Lokesh

[Malcolm Wade]

John,

Many thanks; will have to re-read the VMS V7-3-2 release notes.

As for upgrading ... this system only just got to 7.3-1!

Thanks again,
Malcolm

[Uwe Zessin]

Malcom,
that's a good excuse, but it might not be a real hindrance ;-)