=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

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

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

=head2 PPC (with HMC) specific:
I<chvm [-V| --verbose] noderange [-p profile]>

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

=head2 PPC (using Direct FSP Management) specific:
I<chvm noderange [-p profile]>

=head2 VMware specific:
I<chvm noderange [-a size] [-d disk] [-p disk] [--resize disk=size] [--cpus count] [--mem 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 profile>  Name of an existing partition profile.

B<attr=val>    Specifies one or more "attribute equals value" pairs, separated by spaces.

B<-V>          Verbose output.

=head2 VMware specific:

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

B<--cpus count> Set the number of CPUs.

B<-d 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 memory> Set the memory, defaults to MB.

B<-p 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 disk=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:

I<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:

I<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:

I<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:

I<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:

I<chvm lpar1-lpar8 -p /tmp/lparfile>

=head2 VMware specific:

I<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>