Updated: 11 December 1998 |
OpenVMS System Manager's Manual
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Before you can dismount a disk, you must close any transaction logs on the disk.
This section describes how to dismount a disk that has transaction logs.
$ RUN SYS$SYSTEM:LMCP LMCP> SHOW LOG |
RENAME dirspecSYSTEM$node.LM$JOURNAL dirspecSYSTEM$node.LM$TEMP |
where:
dirspec | is the full specification of the directory containing the transaction log. |
node | is the name of the node that the transaction log belongs to. |
Yes |
Close the transaction log as follows:
|
||||||||||
No | Close the transaction log by rebooting the node. When the node has rebooted, log in. |
RENAME dirspecSYSTEM$node.LM$TEMP dirspecSYSTEM$node.LM$JOURNAL |
where:
dirspec | is the full specification of the directory containing the transaction log. |
node | is the name of the node that the transaction log belongs to. |
This example shows how to dismount the disk DISK$LOG3.
Find out which transaction logs are on the disk:
$ RUN SYS$SYSTEM:LMCP LMCP> SHOW LOG . . . Directory of DISK$LOG3:[LOGFILES] SYSTEM$BLUE.LM$JOURNAL;1) |
The only transaction log on DISK$LOG3 is node BLUE's transaction log.
Stop all the software that uses DECdtm services.
Log in to node BLUE. Then rename the transaction log:
$ RENAME DISK$LOG3:[LOGFILES]SYSTEM$BLUE.LM$JOURNAL - _$ DISK$LOG3:[LOGFILES]SYSTEM$BLUE.LM$TEMP |
Close the transaction log:
$ RUN SYS$SYSTEM:LMCP LMCP> CLOSE LOG Transaction log closed, TP_SERVER process stopped LMCP> EXIT |
Restart the TP_SERVER process:
$ @SYS$STARTUP:DECDTM$STARTUP.COM |
Dismount the disk:
$ DISMOUNT/CLUSTER DISK$LOG3: |
When you want to mount the disk again, mount it clusterwide:
$ MOUNT/CLUSTER/SYSTEM DUA3: LOG3 |
Rename BLUE's transaction log:
$ RENAME DISK$LOG3:[LOGFILES]SYSTEM$BLUE.LM$TEMP - _$ DISK$LOG3:[LOGFILES]SYSTEM$BLUE.LM$JOURNAL |
Restart the software that uses DECdtm services.
25.10 Adding a Node
For every node you add to an OpenVMS Cluster, you must create a new transaction log. This section describes how to create a transaction log for a new node.
Before you perform this task, the new node must be configured into the cluster. For instructions on how to configure a node into a cluster, refer to OpenVMS Cluster Systems.
DO DEFINE/SYSTEM/EXECUTIVE_MODE SYS$JOURNAL dirspec[,...] |
where dirspec is the full specification of a directory containing one or more transaction logs. List all the directories that contain transaction logs, including the directory in which you want to create the new node's transaction log. You can list the directories in any order.
CREATE LOG [/SIZE=size] dirspecSYSTEM$node.LM$JOURNAL |
where:
size | is the size of the transaction log in blocks. By default, the size of the transaction log is 4000 blocks. |
dirspec | is the full specification of the directory in which you want to create the transaction log. |
node | is the name of the new node. |
This example shows how to create a transaction log for a new node, whose SCSNODE name is WHITE.
In this example, the cluster members and the locations of their transaction logs are as follows:
Node | Directory Containing Log |
---|---|
BLUE | DISK$LOG3:[LOGFILES] |
RED | DISK$LOG2:[LOGFILES] |
Neither node has a node--specific version of SYLOGICALS.COM.
Decide the size and location of WHITE's transaction log:
Node | Size of Log (in Blocks) | Disk |
---|---|---|
WHITE | 5000 | DUA4 |
Mount the disk DUA4 clusterwide:
$ MOUNT/CLUSTER/SYSTEM DUA4: LOG4 |
Create a directory for the transaction log:
$ CREATE/DIRECTORY DISK$LOG4:[LOGFILES] |
Redefine SYS$JOURNAL:
$ RUN SYS$SYSTEM:SYSMAN SYSMAN> SET ENVIRONMENT/CLUSTER SYSMAN> DO DEFINE/SYSTEM/EXECUTIVE_MODE SYS$JOURNAL - _SYSMAN> DISK$LOG2:[LOGFILES], DISK$LOG3[LOGFILES], DISK$LOG4:[LOGFILES] SYSMAN> EXIT |
Edit the SYS$STARTUP:SYLOGICALS command procedure to update the SYS$JOURNAL definition. Then create the transaction log:
$ RUN SYS$SYSTEM:LMCP LMCP> CREATE LOG/SIZE=5000 DISK$LOG4:[LOGFILES]SYSTEM$WHITE.LM$JOURNAL LMCP> EXIT |
This section describes how to remove a node if you are using DECdtm services.
If you have a standalone machine, perform steps 1 to 8 only.
Follow all the steps carefully. Taking shortcuts can lead to data corruption. |
DUMP/ACTIVE SYSTEM$node.LM$JOURNAL |
where node is the name of the node that you want to
remove.
This command displays details of all the active
transactions. The last line gives the total number of active
transactions.
DEFINE/SYSTEM/EXECUTIVE_MODE SYS$JOURNAL dirspec[,...] |
where dirspec is the full specification of a directory
containing one or more transaction logs. List all the directories that
contain any transaction logs other than the transaction log of the node
you are removing. You can list the directories in any order.
In a
cluster, use SYSMAN to redefine SYS$JOURNAL clusterwide.
This example shows how to remove the node BLUE. In this example, the cluster members and the locations of their transaction logs are as follows:
Node | Directory Containing Log |
---|---|
BLUE | DISK$LOG3:[LOGFILES] |
RED | DISK$LOG2:[LOGFILES] |
WHITE | DISK$LOG4:[LOGFILES] |
None of the nodes has a node--specific version of the SYLOGICALS.COM command procedure.
Log in to node BLUE.
Stop all the software that uses DECdtm services. Then find out if BLUE's transaction log contains any active transactions:
$ RUN SYS$SYSTEM:LMCP LMCP> DUMP/ACTIVE SYSTEM$BLUE.LM$JOURNAL Dump of log file DISK$LOG3:[LOGFILES]SYSTEM$BLUE.LM$JOURNAL . . . Total of 0 transactions active, 0 prepared and 0 committed. LMCP> EXIT |
Redefine SYS$JOURNAL:
$ RUN SYS$SYSTEM:SYSMAN SYSMAN> SET ENVIRONMENT/CLUSTER SYSMAN> DO DEFINE/SYSTEM/EXECUTIVE_MODE SYS$JOURNAL - _SYSMAN> DISK$LOG2:[LOGFILES], DISK$LOG4:[LOGFILES] SYSMAN> EXIT |
Edit the SYS$MANAGER:SYLOGICALS.COM command procedure to update the SYS$JOURNAL definition.
Archive BLUE's transaction log. Then shut down node BLUE:
$ @SYS$SYSTEM:SHUTDOWN.COM . . . Should an automatic system reboot be performed [NO]? NO |
Restart the software that uses DECdtm services. Then reconfigure the cluster:
$ @SYS$STARTUP:CLUSTER_CONFIG.COM Cluster Configuration Procedure 1. ADD a node to a cluster. 2. REMOVE a node from the cluster. 3. CHANGE a cluster member's characteristics. 4. CREATE a duplicate system disk for BLUE. Enter choice [1]: 2 . . . Updating network database... The configuration procedure has completed successfully. |
By default, DECdtm services start automatically when you boot the computer. The DECdtm process, TP_SERVER, then checks for a transaction log, and continues checking until it finds one.
Disable DECdtm services if you do not use, and do not plan to use, any software that uses DECdtm services. This saves memory and CPU time.
In an OpenVMS Cluster, disable DECdtm services on all the nodes in the cluster.
$ RUN SYS$SYSTEM:LMCP LMCP> CLOSE LOG |
$ ! $ DEFINE/SYSTEM/EXECUTIVE_MODE SYS$DECDTM_INHIBIT yes $ ! |
Enable DECdtm services only if you have previously disabled them and you now want to run software that uses DECdtm services.
$ DEASSIGN/SYSTEM/EXECUTIVE_MODE SYS$DECDTM_INHIBIT |
$ @SYS$STARTUP:DECDTM$STARTUP.COM |
This example shows how to enable DECdtm services in a cluster environment.
Deassign SYS$DECDTM_INHIBIT, then start up the TP_SERVER process.
$ RUN SYS$SYSTEM:SYSMAN SYSMAN> SET ENVIRONMENT/CLUSTER SYSMAN> DO DEASSIGN/SYSTEM/EXECUTIVE_MODE SYS$DECDTM_INHIBIT SYSMAN> DO @SYS$STARTUP.DECDTM$STARTUP.COM SYSMAN> EXIT |
Edit the SYS$MANAGER:SYLOGICALS.COM command procedure to delete the SYS$DECDTM_INHIBIT definition.
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