=head1 NAME

B<chvm> - Changes HMC- and IVM-managed partition profiles. For P7 IH, chvm only could be used to change the I/O slots assignment to LPARs.

=head1 SYNOPSIS

B<chvm> [B<-h>| B<--help>]

B<chvm> [B<-v>| B<--version>]

=head2 PPC (with HMC) specific:

B<chvm> [B<-V>| B<--verbose>] I<noderange> [B<-p> I<profile>]

B<chvm> [B<-V>| B<--verbose>] I<noderange> B<attr>=I<val> [B<attr>=I<val>...]

=head2 PPC (using Direct FSP Management) specific:

B<chvm> I<noderange> [B<-p> I<profile>]

=head2 VMware specific:

B<chvm> I<noderange> [B<-a> I<size>] [B<-d> I<disk>] [B<-p> I<disk>] [B<--resize> B<disk>=I<size>] [B<--cpus> I<count>] [B<--mem> I<memory>]

=head1 DESCRIPTION

=head2 PPC (with HMC) specific:

The chvm command modifies the partition profile for the partitions specified in noderange. A partitions current profile can be read using lsvm, modified, and piped into the chvm command, or changed with the -p flag. 

This command also supports to change specific partition attributes by specifying one or more "attribute equals value" pairs in command line directly, without whole partition profile.

=head2 PPC (using Direct FSP Management) specific:

chvm is designed to assign the I/O slots to the new LPAR. Both the current IO owning lpar and the new IO owning lpar must be powered off before an IO assignment. Otherwise, if the I/O slot is belonged to an Lpar and the LPAR is power on, the command will return an error when trying to assign that slot to a different lpar. 

The administrator should use lsvm to get the profile content, and then edit the content, and add the node name with ":" manually before the I/O which will be assigned to the node. And then the profile can be piped into the chvm command, or changed with the -p flag.

=head2 VMware specific:

The chvm command modifes the vm specified in noderange.  Calling with deregister or purge options at the same time as the resize option is not recommended.

=head1 OPTIONS

=head2 Common:

B<-h>          

Display usage message.

B<-v>          

Command Version.

=head2 PPC specific:

B<-p> I<profile>  

Name of an existing partition profile.

B<attr>=I<val>    

Specifies one or more "attribute equals value" pairs, separated by spaces.

B<-V>          

Verbose output.

=head2 VMware specific:

B<-a> I<size> 

Add a new Hard disk with size defaulting to GB.  Multiple can be added with comma separated values.

B<--cpus> I<count> 

Set the number of CPUs.

B<-d> I<disk> 

Deregister the Hard disk but leave the backing files.  Multiple can be done with comma separated values.  The disks are specified by SCSI id.  Size defaults to GB.

B<--mem> I<memory> 

Set the memory, defaults to MB.

B<-p> I<disk> 

Purge the Hard disk.  Deregisters and deletes the files.  Multiple can be done with comma separated values.  The disks are specified by SCSI id.  Size defaults to GB.

B<--resize> B<disk>=I<size> 

Change the size of the Hard disk.  The disk can never be set to less than it's current size.  Multiple disks can be resized to I<size> by using comma separated values on the left side of B<=>.  The disks are specified by SCSI id.  Size defaults to GB.

=head1 RETURN VALUE

0 The command completed successfully.

1 An error has occurred.

=head1 EXAMPLES

=head2 PPC (with HMC) specific:

1. To change the partition profile for lpar4 using the configuration data in the file /tmp/lparfile, enter:

 cat /tmp/lparfile | chvm lpar4

Output is similar to:

 lpar4: Success

2. To change the partition profile for lpar4 to the existing profile 'prof1', enter:

 chvm lpar4 -p prof1

Output is similar to:

 lpar4: Success

3. To change partition attributes for lpar4 by specifying attribute value pairs in command line, enter:

 chvm lpar4 max_mem=4096

Output is similar to:

 lpar4: Success

=head2 PPC (using Direct FSP Management) specific:

1.To change the I/O slot profile for lpar4 using the configuration data in the file /tmp/lparfile, the I/O slots information is similar to:

 4: 514/U78A9.001.0123456-P1-C17/0x21010202/2/1
 4: 513/U78A9.001.0123456-P1-C15/0x21010201/2/1
 4: 512/U78A9.001.0123456-P1-C16/0x21010200/2/1

then run the command:

 cat /tmp/lparfile | chvm lpar4

2. To change the I/O slot profile for lpar1-lpar8 using the configuration data in the file /tmp/lparfile. Users can use the output of lsvm.and remove the cec information, and  modify the lpar id  before each I/O, and run the command as following:

 chvm lpar1-lpar8 -p /tmp/lparfile

=head2 VMware specific:

 chvm vm1 -a 8,16 --mem 512 --cpus 2

Output is similar to:

 vm1: node successfully changed


=head1 FILES

/opt/xcat/bin/chvm


=head1 SEE ALSO

L<mkvm(1)|mkvm.1>, L<lsvm(1)|lsvm.1>, L<rmvm(1)|rmvm.1>