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:
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
When I was using windowsXP I encountered a file manager called UltraExplorer http://www.mustangpeak.net/ultraexplorer.html that appeared really impressive.
Now in the Linux/UNIX world I was pointed towards a similar idea called 4Pane
http://www.4pane.co.uk/
I'm surprised to do a search on... (3 Replies)
Discussion started by: catch22
3 Replies
2. Solaris
I've looked a little but haven't found a solid answer, assuming there is one.
What's better, hardware mirroring or ZFS mirroring? Common practice for us was to use the raid controllers on the Sun x86 servers. Now we've been using ZFS mirroring since U6. Any performance difference? Any other... (3 Replies)
Discussion started by: Lespaul20
3 Replies
3. Solaris
Hello All,
In the output of the command "mpdcontrol -no xlist", I found that, some of the preferred paths are marked as "err". You can see the output below:
# mpdcontrol -noxlist
Unit Dev# MPD_ID/Policy DeviceName FC_AL DevMajMin IOcnt State... (0 Replies)
Discussion started by: sundar3350
0 Replies
4. Solaris
Hi ,
I am new to SVM .when i try to learn RAID 1 , first they are creating two RAID 0 strips through
metainit d51 1 1 c0t0d0s2
metainit d52 1 1 c1t0d0s2
In the next step
metainit d50 -m d51
d50: Mirror is setup
next step is
metaattach d50 d52
d50 : submirror d52 is... (7 Replies)
Discussion started by: vr_mari
7 Replies
5. AIX
Hi,
lets say we have two boot interfaces en0 en1
and two resource groups, with two service ips, sip1 and sip2, one persistent ip pers1
both persistend and service ips are applied as ip-alias
when I start the cluster, and bring the resource groups up, it looks like
en0: sip1 and sip2
... (4 Replies)
Discussion started by: funksen
4 Replies
6. IP Networking
I rotate between a static lan, dhcp lan, and various wireless networks daily. Is there a way to set preferred network connections? I use some static ip's daily, some static ip's like once a month, and almost never use the dhcp lan. The same I do with my various wireless networks. Some I use daily... (0 Replies)
Discussion started by: cokedude
0 Replies
7. Solaris
Hi all,
After being dumped in a Solaris sysadmin role, i have been trying to tidy the unpatched mess I have inherited. Part of this task is to update the current AMP stack.
The current stack is Webstack 1.5, which was current in 2009, and as far as I can see, no longer supported. Post the... (2 Replies)
Discussion started by: Sol-nova
2 Replies
8. HP-UX
what is the difference between DRD and Root Mirror Disk using LVM mirror ? (3 Replies)
Discussion started by: maxim42
3 Replies
9. Solaris
Hello,
I am upgrading Veritas from 5.1 to 6.0.1/6.0.5 in a Solaris 10 u8 server with OS mirrored (rpool) in zfs/zpool configuration.
I need to split it to have a quick way to backout in case of failure (make splitted mirror side bootable for a quick revert, like booting from it). I remember... (3 Replies)
Discussion started by: feroccimx
3 Replies
LEARN ABOUT DEBIAN
amzfs-snapshot
AMZFS-SNAPSHOT(8) System Administration Commands AMZFS-SNAPSHOT(8)
NAME
amzfs-snapshot - Amanda script to create zfs snapshot
DESCRIPTION
amzfs-snapshot is an Amanda script implementing the Script API. It should not be run by users directly. It create a zfs snapshot of the
filesystem where the path specified is mounted.
PRE-DLE-* create a snapshot and the POST-DLE-* destroy the snapshot, *-DLE-AMCHECK, *-DLE-ESTIMATE and *-DLE-BACKUP must be set to be
executed on the client:
execute-on pre-dle-amcheck, post-dle-amcheck, pre-dle-estimate, post-dle-estimate, pre-dle-backup, post-dle-backup
execute-where client
The PRE_DLE_* script output a DIRECTORY property telling where the directory is located in the snapshot. The application must be able to
use the DIRECTORY property, amgtar can do it.
The script is run as the amanda user, it must have the priviledge to create and destroy snapshot:
zfs allow -ldu AMANDA_USER mount,snapshot,destroy 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 DLE must be one of:
Desciption Example
---------- -------
Mountpoint /data
Arbitrary mounted dir /data/interesting_dir
ZFS pool name datapool
ZFS filesystem datapool/database
ZFS logical volume datapool/dbvol
The filesystem must be mounted.
PROPERTIES
This section lists the properties that control amzfs-snapshot's functionality. See amanda-scripts(7) for information on the Script API,
script configuration.
DF-PATH
Path to the 'df' binary, search in $PATH by default.
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-snapshot script to create a snapshot and use amgtar to backup the snapshot.
define script-tool amzfs_snapshot {
comment "backup of zfs snapshot"
plugin "amzfs-snapshot"
execute-on pre-dle-amcheck, post-dle-amcheck, pre-dle-estimate, post-dle-estimate, pre-dle-backup, post-dle-backup
execute-where client
#property "DF-PATH" "/usr/sbin/df"
#property "ZFS-PATH" "/usr/sbin/zfs"
#property "PFEXEC-PATH" "/usr/sbin/pfexec"
#property "PFEXEC" "NO"
}
define dumptype user-zfs-amgtar {
dt_amgtar
script "amzfs_snapshot"
}
SEE ALSO
amanda(8), amanda.conf(5), amanda-client.conf(5), amanda-scripts(7)
The Amanda Wiki: : http://wiki.zmanda.com/
AUTHORS
Jean-Louis Martineau <martineau@zmanda.com>
Zmanda, Inc. (http://www.zmanda.com)
Dustin J. Mitchell <dustin@zmanda.com>
Zmanda, Inc. (http://www.zmanda.com)
Amanda 3.3.1 02/21/2012 AMZFS-SNAPSHOT(8)