Commands Reference, Volume 5, s - u

syncvg_Command

  Purpose

   Synchronizes logical volume copies that are not current.

  Syntax

   syncvg [ -f ] [ -i ] [ -H ] [ -P NumParallelLps ] { -l |
   -p | -v } Name ...

  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  vol-
ume name,
   physical  volume  name, or volume group name. The synchroniza-
tion process
   can be time consuming, depending on the hardware  characteris-
tics 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.

   Unless disabled, the copies within a volume group are synchro-
nized
   automatically  when the volume group is activated by the vary-
onvg
   command.

   Note:
   For the sycnvg command to be successful,  at  least	one  good
copy of the
   logical  volume should be accessible, and the physical volumes
that
   contains this copy should be in ACTIVE state. If the -f option
is used,
   the above condition applies to all mirror copies.

   If the -P option is not specified, syncvg will check for the
   NUM_PARALLEL_LPS environment variable. The value of NUM_PARAL-
LEL_LPS will
   be used to set the number of logical partitions to be synchro-
nized in
   parallel.

  Flags

		     Specifies a good physical copy is chosen and
propagated
   -f		     to all other copies of  the  logical  parti-
tion, whether or
		     not they are stale.
		     Postpones	writes	for  this volume group on
other active
		     concurrent cluster nodes until this sync op-
eration is
   -H		      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.
   -p		     Specifies that the Name parameter represents
a physical
		     volume device name.
		     Numbers of logical partitions to be synchro-
nized in
		     parallel. The valid range for NumParallelLps
is 1 to 32.
		     NumParallelLps must be tailored to  the  ma-
chine, disks in
		     the volume group, system resources, and vol-
ume group
		     mode.

   -P NumParallelLps When a volume group is varied on in  concur-
rent 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.
   -v		     Specifies that the Name parameter represents
a volume
		     group device name.

  Examples

    1. To synchronize the copies on physical volumes hdisk04  and
hdisk05,
       enter:

	 syncvg
 -p hdisk04 hdisk05

    2.	To synchronize the copies on volume groups vg04 and vg05,
enter:

	 syncvg
 -v vg04 vg05

  Files

   /usr/sbin/syncvg Contains the syncvg command.
   /tmp 	     Directory	where  the  temporary  files  are
stored and while
		    the command is running.

  Related Information

   The varyonvg command.

   The Logical volumn storage in Operating system and device man-
agement
   explains the Logical Volume Manager, physical volumes, logical
volumes,
   volume  groups, organization, ensuring data integrity, and al-
location
   characteristics.

   The System management interface tool in Operating  system  and
device
   management  explains the structure, main menus, and tasks that
are done
   with SMIT.

________________________________________________________________________________

		      Commands Reference, Volume 5, s - u

syncvg_Command

  Purpose

   Synchronizes logical volume copies that are not current.

  Syntax

   syncvg [ -f ] [ -i ] [ -H ] [ -P NumParallelLps ] { -l |
   -p | -v } Name ...

  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  vol-
ume name,
   physical  volume  name, or volume group name. The synchroniza-
tion process
   can be time consuming, depending on the hardware  characteris-
tics 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.

   Unless disabled, the copies within a volume group are synchro-
nized
   automatically  when the volume group is activated by the vary-
onvg
   command.

   Note:
   For the sycnvg command to be successful,  at  least	one  good
copy of the
   logical  volume should be accessible, and the physical volumes
that
   contains this copy should be in ACTIVE state. If the -f option
is used,
   the above condition applies to all mirror copies.

   If the -P option is not specified, syncvg will check for the
   NUM_PARALLEL_LPS environment variable. The value of NUM_PARAL-
LEL_LPS will
   be used to set the number of logical partitions to be synchro-
nized in
   parallel.

  Flags

		     Specifies a good physical copy is chosen and
propagated
   -f		     to all other copies of  the  logical  parti-
tion, whether or
		     not they are stale.
		     Postpones	writes	for  this volume group on
other active
		     concurrent cluster nodes until this sync op-
eration is
   -H		      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.
   -p		     Specifies that the Name parameter represents
a physical
		     volume device name.
		     Numbers of logical partitions to be synchro-
nized in
		     parallel. The valid range for NumParallelLps
is 1 to 32.
		     NumParallelLps must be tailored to  the  ma-
chine, disks in
		     the volume group, system resources, and vol-
ume group
		     mode.

   -P NumParallelLps When a volume group is varied on in  concur-
rent 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.
   -v		     Specifies that the Name parameter represents
a volume
		     group device name.

  Examples

    1. To synchronize the copies on physical volumes hdisk04  and
hdisk05,
       enter:

	 syncvg
 -p hdisk04 hdisk05

    2.	To synchronize the copies on volume groups vg04 and vg05,
enter:

	 syncvg
 -v vg04 vg05

  Files

   /usr/sbin/syncvg Contains the syncvg command.
   /tmp 	     Directory	where  the  temporary  files  are
stored and while
		    the command is running.

  Related Information

   The varyonvg command.

   The Logical volumn storage in Operating system and device man-
agement
   explains the Logical Volume Manager, physical volumes, logical
volumes,
   volume  groups, organization, ensuring data integrity, and al-
location
   characteristics.

   The System management interface tool in Operating  system  and
device
   management  explains the structure, main menus, and tasks that
are done
   with SMIT.