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SavWareHA File and Program Descriptions
/etc/sentinel.d/administrators
(Text
File)
List of users
on both the Primary and Standby System s that have been designated
as system administrators. Each administrator will have a login id
listed on separate lines. For example:
root
mary_r
dmann@aa.sa.org
(requires proper configuration of MMDF)
These administrators
will receive mail and messages regarding the status of the SavWareHA
system. This file must be manually edited using a text editor such
as ‘vi ’.
Make certain
that ‘mail ’ functions properly by sending a test mail
message to the proposed system administrator, especially if ‘mmdf
’ must be modified. For instance, in the example above, the
administrator should send mail to ‘dmann’:
mail dmann@aa.sa.org
Hello down there
;-)
[CONTROL-D]
This should
initiate a ‘mmdf ’ request, and the recipient should receive
it in a timely fashion. Much more information on ‘mmdf’
may be found in the SCO ‘System Administrator’s Guide’
manual .
/etc/sentinel.d/dkinfo
(Program)
This program
displays the disk hardware name(s), size, SCSI adapter and adapter
number, and SCSI target ID of each disk partition on the system
found through the file ‘/etc/conf/cf.d/mscsi’. This is
used in the SavWareHA setup when [F3] is pressed to configure the
mirror .
/etc/sentinel.d/dkuse
(Program)
This program
shows if and where a disk partition is used. This is invoked when
[F3 ] is pressed during mirror construction.
/etc/sentinel.d/filesys
(Text File)
Defines the
mirrored filesystems . For example, the file might read:
# bdev(primary)
bdev(standby) mountpoint flags mount flags
/dev/mirror00
/dev/mirror00 /u A
This indicates
that on the Primary System , the filesystem referenced by ‘/dev/mirror00’
will be mirrored over to the Standby System onto the filesystem
‘/dev/mirror00’. This mirror will be mounted on the Primary
System on directory ‘/u’.
The flags and
mount flags columns contain the flags to be passed to the mount
command. The flag ‘A’ means to automatically mount the
filesystem during the transition to multi-user mode. The flag ‘R’
means that this is a raw database partition that is mirrored but
not automatically mounted. This file must be identical on both systems.
This file is
created and modified by the SavWareHA configuration utility.
/usr/adm/dmx.log
(Text File)
Comprehensive
log file for SavWareHA. Information regarding status changes (normal
to fallback and vice versa), configuration changes, and errors will
be recorded in this log.
/etc/sentinel.d/mode
(Text File)
Text representation
of the mode of the SavWareHA system. Its value is either ‘normal’
or ‘fallback’. A copy of this is accessed on both systems.
/etc/sentinel.d/roles
(Text File)
Consists of
two lines, one per machine, that determine the current SavWareHA
configuration. For example, the file might read:
neptune primary
pluto standby
This would indicate
that the machine ‘neptune ’ is currently operating as
the Primary System , and ‘pluto’ is currently operating
as the Standby System . This file must be identical on both systems.
Administration
Recommendation: It is recommended that the network card for the
data link on the primary system be given the name “neptune”
and the network card for the data link on the standby system be
given the name “pluto”. This must be done with netconfig
before SavWareHA is configured. If this is done, the roles file
will be:
netptune primary
pluto standby
This file is
created and modified by the SavWareHA configuration utility.
/etc/sentinel.d/sentinel
(Program)
This is the
SavWareHA executable program. It is linked to /etc/sentinel. All
SavWareHA menu-driven functions are accessed from this program.
/etc/sentinel.d/sentinel.sh
(Shell Program)
This is a supporting
shell script for the SavWareHA program. This program is linked to
/etc/sentinel.sh.
/etc/sentinel.d/sentinel.strt
(Shell Program)
A link between
this file, ‘/etc/rc2.d/S85sentinel’ and ‘/etc/rc0.d/K05sentinel’
is made to determine what processes are to be started up or shutdown
during transition phases of the SavWareHA system.
/etc/sentinel.d/terminals
(Text File)
The list of
terminals and serial resources that are to be enabled and disabled
during transitions from normal to fallback mode . The format for
this file is serial device name without the preceding ‘/dev’.
For example, the file might contain:
tty1a
ttyn0101
ttybd
This would denote
that terminals ‘/dev/tty1a’, ‘/dev/ttyn0101’,
and ‘/dev/ttybd’ are to be enabled for login on the Primary
System under ‘normal’ mode, and on the Standby System
under ‘fallback’ mode. This file must be manually edited
using a text editor. This file should be identical on both systems.
Administration
Recommendation: It is recommended that S75inittab be used to control
the terminals if more that three terminals are going to be switched.
This will reduce the amount of time required for a system switchover.
See application note for S75inittab.
/etc/default/netdisk
This is created and modified by the SavWareHA program during SavWareHA
configuration. It contains the network addressing for the data link
. This file is only used on the Primary System . This file can be
manually edited as necessary, but the Primary System will need to
be rebooted for the changes to take effect. The format of the file
is:
machine:device
- (Size) (0) (Unit#) (Primary LLI ) (Remote LLI)
Please note
that the file requires [TAB] characters for field separators.
For example,
the file might look like:
pluto:/dev/rsrp00
- 0 0 0 /dev/wdn0 /dev/wdn0
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