TOC: Index

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Index
A B C D E F G H I L M N O P Q R S T U V W Symbols

Addressing data

recovery from errors

ALLOCATE command

ALLOCLASS parameter

Allocation classes

naming format

nonzero

ANALYZE/DISK/SHADOW command

ATM

AUTOGEN utility

using with MODPARAMS.DAT file

Availability

achieved by shadow set configurations

levels

of data

performance impacts

recovery from failures

with write I/O requests

Backup operations

data consistency requirements

database systems

guidelines for using shadow set member

host-based RAID

mapped files

multiple shadow sets

OpenVMS Cluster operations

OpenVMS file system

Backupoperations

RMS considerations

Backup operations

restoring data

revalidation of data consistency methods

Backup utility (BACKUP)

Booting

satellite boot devices

satellite nodes

system disk shadow set

CI (computer interconnect)

and MSCP server access to shadow sets

preventing resource saturation

utilized for copy operations

Cluster systems See OpenVMS Cluster systems

CLUSTER_CONFIG.COM commandprocedure

setting shadowing parameters

CLUSTER_CONFIG_LAN.COM command procedure

setting shadowing parameters

Compatibility

shadow set members

Configuration of a shadow set

effect on availability

Configuration of a shadowset

examples

Configurationof a shadow set

high-availability local area cluster

Configuration of a shadowset

maximum shadow sets

Configuration of a shadow set

one system with one adapter

one system with two host-based adapters

Configurationof a shadow set

OpenVMS Cluster with dual adapters

Consistency

data

ensuring during failures

when adding shadow set members

Controller errors

recovery from

Controllers

performing DCD commands

setting preferred path

supporting performance assists

using performance assists

write log entries

Copy operations

adding a member

after a system failure

assisted

controllers supporting

assisted

disabling on HSC controller

assisted

disabling on HSC controller

overview

performance

setting preferred path

BACKUP revision number

comparison with minicopy

controlling with the SHADOW_MAX_COPY parameter

example

managing

multiple simultaneous

no copy

performance of minicopy versus DCD copy

proper dismount

purpose

recovery from system failures

transitions in shadow set membership

unassisted

volume label

volume shadowing generation number

with merge operation

Copy threads

controlling dynamically

controlling with the SHADOW_MAX_COPY parameter

referred to in status messages

Crash dumps

shadowed system disk and minicopy

written to system disk shadow set

Data

changing on individual members

Data availability. See Availability

Data consistency

when adding shadow set members

Data errors

recovery from

DCD (disk copy data) commands

DDS. See Dissimilar device shadowing

Devices

allocating

DECram served device

recovery from controller errors

recovery from data errors

recovery from errors

recovery from failures

recovery from unit or drive errors

example of a satellite node

Digital Storage Architecture(DSA) disk drives

Disaster tolerant OpenVMS Cluster systems. See OpenVMS Cluster systems

Diskmirroring

Disk volumes

initializing

Disks

compatibility to form a shadow set

in Files-11 structure

initializing

SCSI support

Dismounting a shadow set

overview

with SYS$DISMOU system service

Dismounting a shadow set member

Displaying shadow set information

Dissimilar device shadowing (DDS)

Dissolving a shadow set

with SYS$DISMOU system service

Distributing members of shadow sets

Distributing shadow sets

DISMOUNT command

creating a write bitmap

removing a shadow set member

required privileges

/POLICY=MINICOPY

DISMOUNT/FORCE_REMOVAL command

DOSD (dump off system disk)

use of DUMPSTYLE

Drive errors

recovery from

DSA (Digital Storage Architecture)

naming the virtual unit

support for compliant hardware

DSSI (Digital Storage Systems Interconnect)

and MSCP server access to shadow sets

DUMPSTYLE system parameter

DVE. See Dynamic volume expansion

Dynamic volumeexpansion

Dynamic volume expansion(DVE)

Error messages

Errors

Ethernet

and MSCP server access to shadow sets

Gigabit Ethernet usage

preventing resource saturation

utilized for copy operations

Failures. See Recoveries

FDDI (Fiber Distributed Data Interface)

massively distributed shadowing

Files-11 volume structure

shadowing support

Forced errors

checking the SCSI NOFE characteristics

F$GETDVI lexical function

Generation number

copy operation

GRPNAM privilege

DISMOUNT command

required for MOUNT command

Hardware environment

Host-based adapter (HBA)

HSC (hierarchical storage controller)

disabling performance assists

INITIALIZE command

/ERASE qualifier

/SHADOW qualifier

INITIALIZE/LIMITcommand

Initializing

disk volumes

Installations

See also See also License registrations

Volume Shadowing for OpenVMS

INITIALIZE/SHADOW/ERASE command

Item codes

for creating and mounting a shadow set

for creating and mounting a volume set

to add to a shadow set

with SYS$GETDVI system service

with SYS$MOUNT system service

LANCP databases

example of a satellite node

License registrations

capacity

Licenseregistrations

capacity

License registrations

per disk

volume shadowing

LOG_IO privilege

DISMOUNT/POLICY command

MOUNT/POLICY command

Massstorage control protocol

See also See MSCP

Member units

backing up

crash dumping to system disk

mounting

requirement for nonzero allocation class

Members

Membership

transitions during copy operations

transitions during merge operations

transitions during minimerge operations

Merge operations

after a system failure

assisted

performance

automatic throttling

controlling with the SHADOW_MAX_COPY parameter

example

improving performance

managing

multiple simultaneous

preventing unnecessary

throttling

transitions in shadow set membership

unassisted

Messages

displayed for unregistered nodes

Minicopy operations

Minimerge operations

actions during system failure

after a system failure

configuring for system disk

controllers supporting

disabling

disabling on HSC controller

Mirroring

MODPARAMS.DAT file

editing in an OpenVMS Cluster

example

setting parameters in

MOUNT command

adding shadow set members

creating a write bitmap

format

POLICY qualifier

qualifiers

reconstructing shadow sets with /INCLUDE

required privileges

starting a write bitmap

/CLUSTER qualifier

Mount verification

Mounting

MOUNT command

/NOMOUNT_VERIFICATION qualifier

/OVERRIDE=IDENTIFICATION qualifier

MOUNTcommand

/OVERRIDE=SHADOW_MEMBERSHIP qualifier

MOUNT command

/POLICY=MINICOPY

/SYSTEM qualifier

Mounting

volume sets

MSCP (mass storage control protocol)

DCD commands

server

supported devices

MVTIMEOUT parameter

Naming conventions

devices

shadow sets

virtual units

NOFE (no forced error bit)

OpenVMS Cluster systems

computer interconnects

disaster-tolerant clusters

managing shadow set members

enhanced shadowing performance

interprocess communication

maximum number of shadow sets

MSCP server access

mounting shadow sets

multiple-site clusters

shadowing across

providing high data availability

requirement for nonzero allocation class

shadowing across

updating system parameters

OPCOM (Operator Communication Manager)

messages

OPER privilege

MOUNT command

PAKs (Product Authorization Keys)

registering

Parameters. See System parameters

Performance

assisted copies

assisted merge operations

automatic merge throttle

controlling copy operations with SHADOW_MAX_COPY

for read I/O requests

Performance assists

copy operation

merge operation

Preferred path

setting for controllers

Privileges

Product Authorization Keys. See PAKs

Quorum disk

RAID (redundant arraysof independent disks)

RAID (redundant arrays of independentdisks)

levels

Read requests

performance

Recoveries

from controller errors

from data errors

from device failure

from system failures

from unit or drive errors

repair actions

repairing data

Satellite nodes

booting shadowed

DECnet database example

LANCP database example

SCBs (storage control blocks)

BACKUP revision number

proper dismount

SCBs (storagecontrol blocks)

read at boot time

SCBs (storage control blocks)

volume label

volume shadowing generation number

SCSI (Small Computer Systems Interface)

disks that cannot be shadowed

hardware compliance

support for compliant hardware

SCSI (Small Computer SystemsInterface)

third-party compliance

SDA. See System Dump Analyzer utility

SET DEVICE command

qualifiers

SET SHADOW command

SETVOLUME/LIMIT command

Servers

MSCP

shadow server messages

Shadow servers

messages

Shadow set members

inaccessibility because of failures

Shadow sets

configuration examples

copy operations

crash dumping to system disk

creating

with SYS$MOUNT system service

creating

with SYS$MOUNT system service

definition

dismounting

with SYS$DISMOU system service

displaying information about

dissolving

with SYS$DISMOU system service

distributing

examining

with DCL command SHOW DEVICE

with F$GETDVI lexical function

modifying individual members

mounting

a volume set

with SYS$MOUNT system service

mounting

with SYS$MOUNT system service

overview

Shadowsets

quorum disk

SHADOWING parameter

SHADOW_MAX_COPY parameter

guidelines for setting

SHADOW_MAX_UNIT parameter

SHADOW_MBR_TMO parameter

SHADOW_SITE_ID parameter

SHADOW_SYS_DISK parameter

SHADOW_SYS_TMO parameter

SHADOW_SYS_UNIT parameter

SHADOW_SYS_WAIT parameter

Shadow sets

removing members

with DISMOUNT command

with SYS$DISMOU system service

requirements

satellite node

SHAD$MERGE_DELAY_FACTOR_DSAnnnn

SHAD$MERGE_DELAY_THRESHOLD_DSAnnnn

SHOW CLUSTER command

displaying write bitmap information

SHOW DEVICE command

displaying write bitmap information

during copy operation

SHOW DEVICEcommand

during merge operation

during steady state

SHOW DEVICE command

overview

SHOWDEVICE command

sample sequence

SHOW DEVICE command

shadow set member

specifying the virtual unit

SHOWSHADOW command

Shadow sets

standalone BACKUP

state changes

steady-state performance

system disk

upgrading

transferring changes to members

Shutdown procedures

creating site-specific

preventing unnecessary merge operations on reboot

Single systems

enhanced shadowing performance

Standalone BACKUP

Status messages

Steady state

actions during system failure

definition

performance

Storage control blocks

See also See SCBs

Stripe sets

shadowed

Striping

and performance

System configurations

effect on performance

setting up

System disk shadow sets

booting from

booting satellite nodes

crash dumping to

SHADOW_SYS_DISK parameter

SHADOW_SYS_TMO parameter

SHADOW_SYS_UNIT parameter

SHADOW_SYS_WAIT parameter

System disks

crash dumping to

dump file restriction

shadowing across an OpenVMS Cluster

System Dump Analyzer utility (SDA)

checking SCSI compliance

dumping to a shadowed disk

System DumpAnalyzer utility (SDA)

dumping to a system disk shadow set

System Dump Analyzer utility (SDA)

examining a shadow set

example

System disks

upgrading

System management

booting a system disk shadow set

on systems with volume shadowing

setting up a shadowing environment

System parameters

ALLOCLASS

displaying current SYSGEN values

SYLOGICALS.COM startup file

defining site location

SYSGEN (System Generation utility)

See also See System parameters

System parameters

setting in the MODPARAMS.DAT file

required for MOUNT command

System services

performing shadow set operations

SYS$DISMOU system service

condition values returned by

SYS$DISMOUsystem service

dismounting volumes with

SYS$GETDVIsystem service

getting information about volumes with

SYS$MOUNT system service

condition values returned by

item codes

mounting volumes

shadow set item codes

shadowed volume sets

Timeouts

disk recovery

Transient state

definition

Transitions

during copy operations

during merge operations

during minimerge operations

in shadow set membership

Troubleshooting. See Recoveries

UICs (user identification codes)

for mounting disks

Unit errors

recovery from

Upgrades

operating system

User identification codes. See UICs

Virtualunits

as system disk shadow set

Virtual units

Volume labels

differences among shadow set members

Volumesets

Volume sets

virtual unit item descriptor

VOLPROC command

Write bitmaps

managing with DCL commands

Write requests

Symbols

/ABORT_VIRTUAL_UNIT qualifier

/CLUSTER qualifier

mounting a shadow set clusterwide

/COPY qualifier

/INCLUDE qualifier

/NOMOUNT_VERIFICATION qualifier

/OVERRIDE=IDENTIFICATION qualifier

/OVERRIDE=SHADOW_MEMBERSHIP qualifier

/POLICY=MINICOPY (=OPTIONAL) qualifier

/SHADOW qualifier

/SITE qualifier

/SYSTEM qualifier

mounting shadow sets for systemwide access

/POLICY=MINICOPYqualifier