Checkpoint a virtual cluster

Synopsis

pcocc ckpt [OPTIONS] CKPT_DIR

Description

Checkpoint the current state of a cluster. Both the disk image and memory of all VMs of the cluster are saved and the cluster is terminated. It is then possible to restart from this state using the --restart-ckpt option of the alloc and batch commands.

CKPT_DIR should not already exist unless -F is specified. In that case, make sure you're not overwriting the checkpoint from which the cluster was restarted.

Warning

Qemu does not support checkpointing all types of virtual devices. In particular, it is not possible to checkpoint a VM with 9p exports mounted or attached to host devices such as an Infiniband virtual function.

Options

-j, --jobid [INTEGER]

Jobid of the selected cluster

-J, --jobname [TEXT]

Job name of the selected cluster

-F, --force

Overwrite directory if exists

-h, --help

Show this message and exit.

Example

To checkpoint the cluster with jobid 256841 in the $HOME/ckpt1/ directory:

pcocc ckpt -j 256841 $HOME/ckpt1/

This produces a disk and a memory image for each VM:

ls ./ckpt1/
disk-vm0  disk-vm1  memory-vm0  memory-vm1

To restore a virtual cluster, see pcocc-alloc(1) or pcocc-batch(1).

See also

pcocc-alloc(1), pcocc-batch(1), pcocc-save(1), pcocc-dump(1)