During an installation of a ZFS root file system or a migration from a UFS root file system, a swap device and a dump device are created on a ZFS volume in the ZFS root pool. The following examples show how to display information about the swap device and the dump device.
# swap -l swapfile dev swaplo blocks free /dev/zvol/dsk/rpool/swap 253,3 16 8257520 8257520 # dumpadm Dump content: kernel pages Dump device: /dev/zvol/dsk/rpool/dump (dedicated) Savecore directory: /var/crash/ Savecore enabled: yes
If you need to change your swap area or dump device after the system is installed, use the swap and dumpadm commands as in previous Oracle Solaris releases. If you need to create an additional swap volume, create a ZFS volume of a specific size and then enable swap on that device. Then, add an entry for the new swap device in the /etc/vfstab file. For example:
# zfs create -V 2G rpool/swap2 # swap -a /dev/zvol/dsk/rpool/swap2 # swap -l swapfile dev swaplo blocks free /dev/zvol/dsk/rpool/swap 256,1 16 2097136 2097136 /dev/zvol/dsk/rpool/swap2 256,5 16 4194288 4194288
Do not swap to a file on a ZFS file system. A ZFS swap file configuration is not supported.
For information about adjusting the size of the swap and dump volumes, see Adjusting the Sizes of ZFS Swap and Dump Devices.