01-15-2009
How can I create a new swap location in ZFS?
I am running OpenSolaris v5.11
During installation, the installation created default ZFS filesystems, like the dump and swap locations.
I want to change the blocksize of the /dump and /swap locations and make them ZFS volumes.
The ZFS system is on a zpool called rpool
I was able to do a zfs destroy on /rpool/dump and then create another dump location with the proper options:
zfs create -b 131072 -V 1024m rpool/dump
I cannot destroy /rpool/swap though. It tells me that the ...dataset is busy. I did some investigating and found that I have to do a dumpadm but that doesn't work either:
>dumpadm -d swap
dumpadm: no swap devices could be configured as the dump device
>swap -l
swapfile dev swaplo blocks free
/dev/zvol/dsk/rpool/swap 182,1 8 16775160 16775160
How can I destroy the /rpool/swap directory and then create another swap directory and make it a volume with a particular blocksize? Do I rename the swap location to something else?
Thanx.
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LEARN ABOUT FREEBSD
zfsloader
ZFSLOADER(8) BSD System Manager's Manual ZFSLOADER(8)
NAME
zfsloader -- kernel bootstrapping final stage
DESCRIPTION
zfsloader is an extended variant of loader(8) with added support for booting from ZFS. This document describes only differences from
loader(8).
ZFS FEATURES
zfsloader supports the following format for specifying ZFS filesystems which can be used wherever loader(8) refers to a device specification:
zfs:pool/filesystem:
where pool/filesystem is a ZFS filesystem name as described in zfs(8).
If /etc/fstab does not have an entry for the root filesystem and vfs.root.mountfrom is not set, but currdev refers to a ZFS filesystem, then
zfsloader will instruct kernel to use that filesystem as the root filesystem.
ZFS COMMAND EXTENSIONS
lsdev [-v]
Lists ZFS pools in addition to disks and partitions. Adding -v shows more ZFS pool details in a format that resembles zpool status
output.
lszfs filesystem
A ZFS extended command that can be used to explore the ZFS filesystem hierarchy in a pool. Lists the immediate children of the
filesystem. The filesystem hierarchy is rooted at a filesystem with the same name as the pool.
FILES
/boot/zfsloader zfsloader itself.
EXAMPLES
Set the default device used for loading a kernel from a ZFS filesystem:
set currdev=zfs:tank/ROOT/knowngood:
SEE ALSO
gptzfsboot(8), loader(8), zfs(8), zfsboot(8), zfsloader(8), zpool(8)
HISTORY
The zfsloader first appeared in FreeBSD 7.3.
AUTHORS
This manual page was written by Andriy Gapon <avg@FreeBSD.org>.
BSD
September 15, 2014 BSD