syncvg Command
Purpose
Synchronizes logical volume copies that are not current.
Syntax
syncvg [ -f ] [ -i ] [ -H ] [ -P NumParallelLps ] { -l | -p | -v } Name ...{ [ -a { all | pid1,pid2,… } ] [ -r { all | pid1,pid2,… } ] [ -t { all | pid1,pid2,… } ] [ -n vgName ] [ -q ] [ -Q ] }
Description
The syncvg command synchronizes the physical partitions, which are copies of the original physical partition, that are not current. The syncvg command can be used with logical volumes, physical volumes, or volume groups, with the Name parameter representing the logical volume name, physical volume name, or volume group name. The synchronization process can be time consuming, depending on the hardware characteristics and the amount of data.
When the -f flag is used, a good physical copy is chosen and propagated to all other copies of the logical partition, whether or not they are stale. Using this flag is necessary in cases where the logical volume does not have the mirror write consistency recovery.
If the -P option is not specified, syncvg will check for the NUM_PARALLEL_LPS environment variable. The value of NUM_PARALLEL_LPS will be used to set the number of logical partitions to be synchronized in parallel.
Flags
Item | Description |
---|---|
-a { all | pid1,pid2,… } | Pauses one or more sync operations. The following parameters can be passed to
this option:
|
-f | Specifies a good physical copy is chosen and propagated to all other copies of the logical partition, whether or not they are stale. |
-H | Postpones writes for this volume group on other active concurrent cluster nodes until this sync operation is complete. When using the -H flag, the -P flag does not require that all the nodes on the cluster support the -P flag. This flag is ignored if the volume group is not varied on in concurrent mode. |
-i | Reads the names from standard input. |
-l | Specifies that the Name parameter represents a logical volume device name. |
-n vgName |
Manages sync operations for a specific volume group. This option is only valid with the
-a, -r, -t , -q and -Q options.
|
-p | Specifies that the Name parameter represents a physical volume device name. |
-P NumParallelLps | Numbers of logical partitions to be synchronized in parallel.
The valid range for NumParallelLps is 1 to 32. NumParallelLps must
be tailored to the machine, disks in the volume group, system resources,
and volume group mode. When a volume group is varied on in concurrent
mode, all other cluster nodes that have this volume group varied must
be at least AIX® 4.3.0,
otherwise syncvg will ignore this option and continue.
Note: See Description above for more information.
|
[-q] | Queries sync operations. A verbose list of sync operation PIDs is returned. |
[-Q] | Queries sync operations. A comma separated list of sync operation PIDs is returned. |
{-r all | pid1,pid2,… } | Resumes one or more sync. The following parameters can be passed to this
option:
|
{-t all | pid1,pid2,… } | Terminates one or more sync. The following parameters can be passed to this
option:
|
-v | Specifies that the Name parameter represents a volume group device name. |
Security
Examples
Files
Item | Description |
---|---|
/usr/sbin/syncvg | Contains the syncvg command. |
/tmp | Directory where the temporary files are stored and while the command is running. |