B<chvm> - Changes HMC- and IVM-managed partition profiles. For Power 775, chvm could be used to change the octant configuration values for generating LPARs; change the I/O slots assignment to LPARs within the same CEC.
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.
chvm could be used to change the octant configuration values for generating LPARs. chvm is designed to set the Octant configure value to split the CPU and memory for partitions, and set Octant Memory interleaving value. The chvm will only set the pending attributes value. After chvm, the CEC needs to be rebooted manually for the pending values to be enabled. Before reboot the cec, the administrator can use chvm to change the partition plan. If the the partition needs I/O slots, the administrator should use chvm to assign the I/O slots.
chvm is also 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.
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.
Starting numeric id of the newly created partitions. For Power 775 using Direct FSP Management, the id value only could be B<1>, B<5>, B<9>, B<13>, B<17>, B<21>, B<25> and B<29>.
memory interleaving. The setting value only could be B<1> or B<2>. B<2> means B<non-interleaved> mode, the memory cannot be shared across the processors in an octant. B<1> means B<interleaved> mode, the memory can be shared. The default value is B<2> .
If all the octants configuration value are same in one CEC, it will be " B<-r> B<0-7>:I<value>" .
If the octants use the different configuration value in one cec, it will be "B<-r> B<0>:I<value1>,B<1>:I<value2>,...B<7>:I<value7>", or "B<-r> B<0>:I<value1>,B<1-7>:I<value2>" and so on.
The octants configuration value for one Octant could be B<1>, B<2>, B<3>, B<4>, B<5>. The meanings of the octants configuration value are as following:
1 -- 1 partition with all cpus and memory of the octant
2 -- 2 partitions with a 50/50 split of cpus and memory
3 -- 3 partitions with a 25/25/50 split of cpus and memory
4 -- 4 partitions with a 25/25/25/25 split of cpus and memory
5 -- 2 partitions with a 25/75 split of cpus and memory
Set LPAR name for the specified lpars. If '*' specified, it means to get names from xCAT database and then set them for the specified lpars. If a string is specified, it only supports single node and the string will be set for the specified lpar. The user can use lsvm to check the lparnames for lpars.
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.
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.
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.
3. For Power 775 cec1, to create new partitions lpar1-lpar9, the lpar1 will use 25% CPU and 25% memory of the first octant, and lpar2 will use the left CPU and memory of the first octant. lpar3-lpar9 will use all the cpu and memory of each octant, enter:
5. 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:
