04-20-2013
Regarding storage tiering, in high performance environment with ZFS filesystems it is encouraged not to use it.
It also advised not to use data pools if you have any since storage will stripe across all the disks in pool.
Plain luns with only raid protection on storage level as vdevs for zfs pools.
Of course, you will have to take into account amount of spindles in such setup as well as RAID protection level.
Best would be to leave ZFS to do everything on JBOD, but that not feasable with high end storage
For additional performance SAN tweaking with preferred paths (or some other algorithm, not round robin ) per disk can help in some situations.
Check out this document :
http://www.oracle.com/technetwork/se...-wp-167894.pdf
It is for oracle database, but explains alot of things ZFS related and can be used in other scenarios (SSD usage as mentioned).
This User Gave Thanks to Peasant For This Post:
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LEARN ABOUT CENTOS
amzfs-sendrecv
AMZFS-SENDRECV(8) System Administration Commands AMZFS-SENDRECV(8)
NAME
amzfs-sendrecv - Amanda script to create zfs sendrecv
DESCRIPTION
amzfs-sendrecv is an Amanda application implementing the Application API. It should not be run by users directly. It create a zfs snapshot
of the filesystem and backup the snapshot with 'zfs send'. Snapshot are kept after the backup is done, this increase the disk space use on
the client but it is neccesary to be able do to incremental backup. If you want only full backup, you can disable this feature by setting
the KEEP-SNAPSHOT property to 'NO'. Only the restoration of the complete backup is allowed, it is impossible to restore a single file.
The application is run as the amanda user, it must have many zfs priviledge:
zfs allow -ldu AMANDA_USER mount,create,rename,snapshot,destroy,send,receive FILESYSTEM
Some system doesn't have "zfs allow", but you can give the Amanda backup user the rights to manipulate ZFS filesystems by using the
following command:
usermod -P "ZFS File System Management,ZFS Storage Management" AMANDA_USER
This will require that your run zfs under pfexec, set the PFEXEC property to YES.
The format of the diskdevice in the disklist (DLE) must be one of:
Desciption Example
---------- -------
Mountpoint /data
ZFS pool name datapool
ZFS filesystem datapool/database
ZFS logical volume datapool/dbvol
The filesystem doesn't need to be mounted.
PROPERTIES
This section lists the properties that control amzfs-sendrecv's functionality. See amanda-applications(7) for information on the
Application API, application configuration.
DF-PATH
Path to the 'df' binary, search in $PATH by default.
KEEP-SNAPSHOT
If "YES" (the default), snapshot are kept after the backup, if set to "NO" then snapshot are no kept and incremental backup will fail.
ZFS-PATH
Path to the 'zfs' binary, search in $PATH by default.
PFEXEC-PATH
Path to the 'pfexec' binary, search in $PATH by default.
PFEXEC
If "NO" (the default), pfexec is not used, if set to "YES" then pfexec is used.
EXAMPLE
In this example, a dumptype is defined to use amzfs-sendrecv application to backup a zfs filesystem.
define application-tool amzfs_sendrecv {
comment "amzfs-sendrecv"
plugin "amzfs-sendrecv"
#property "DF-PATH" "/usr/sbin/df"
#property "KEEP-SNAPSHOT" "YES"
#property "ZFS-PATH" "/usr/sbin/zfs"
#property "PFEXEC-PATH" "/usr/sbin/pfexec"
#property "PFEXEC" "NO"
}
define dumptype user-zfs-sendrecv {
program "APPLICATION"
application "amzfs_sendrecv"
}
SEE ALSO
amanda(8), amanda.conf(5), amanda-client.conf(5), amanda-applications(7)
The Amanda Wiki: : http://wiki.zmanda.com/
AUTHOR
Jean-Louis Martineau <martineau@zmanda.com>
Zmanda, Inc. (http://www.zmanda.com)
Amanda 3.3.3 01/10/2013 AMZFS-SENDRECV(8)