I'll second that. A wiki page on the ZFS wiki, with best practices and
recommendations about adding SSD would be great. There is not much information
on this subject, I feel. Case scenarios, blogs, etc showing some numbers.
--
This message posted from opensolaris.org
On Fri, Feb 6, 2009 at 11:29 AM, Richard Elling richard.ell...@gmail.com
wrote:
Seriously, is it so complicated that a best practice page is needed?
While you might be right about that, I think there is a need for a good
shared experiences site, howtos, etc.
For example, I want to put a new
Nicholas Lee wrote:
On Fri, Feb 6, 2009 at 11:29 AM, Richard
Elling richard.ell...@gmail.com mailto:richard.ell...@gmail.com wrote:
Seriously, is it so complicated that a best practice page is needed?
While you might be right about that, I think there is a need for a
good shared
Is there an issue with having additional resource that at support each
other?
If information is well documented, then it will be easy to tell if it is out
of date.
Regardless does the current HCL answer the questions I posed?
On Fri, Feb 6, 2009 at 2:26 PM, Richard Elling
Not sure is best to put something like this.
There is wikis like
http://www.solarisinternals.com/wiki/index.php/Solaris_Internals_and_Performance_FAQ
http://wiki.genunix.org/wiki/index.php/WhiteBox_ZFSStorageServer
But I haven't seen anything which has an active community like
So are there no guide lines how to add a SSD disk as a home user? Which is the
best SSD disk to add? What percentage improvements are typical? Or, will a home
user not benefit from adding a SSD drive? It is only enterprise SSD drives that
works, together with some esoteric software from
Orvar,
With my testing, i've seen a 5x improvement with small file creation
when working specifically with NFS. This is after I added an SSD for the
ZIL.
I recommend Richard Elling's zilstat (he posted links earlier). It'll
let you see if a dedicated device for the ZIL will help your specific
Orvar Korvar wrote:
So are there no guide lines how to add a SSD disk as a home user?
I'm not sure any guidelines are needed beyond that which is already
documented in the zpool man page or the ZFS Administration Guide.
What do you believe is missing from those docs?
Which is the best SSD
Is it possible for someone to put up a wiki page somewhere with the various
SSD, ZIL, L2ARC options with Pros, Cons and Benchmarks.
Especially with notes like the below.
Given this is a key area of interest for zfs at the moment, seems like it
would be a useful resource.
On Wed, Feb 4, 2009 at
On Tue, February 3, 2009 15:26, Richard Elling wrote:
Orvar Korvar wrote:
Which is the best SSD disk to add?
The one that somebody else pays for :-)
Does the access pattern for say the ZIL tickle the stuttering bug in the
JMicron-controller multi-level-cell SSDs? That is, in all the cheap
Thanx for your answers guys. :o)
I dont contemplating trying this for my ZFS raid, as the SSD drives are
expensive right now. I just want to be able to answer questions when I convert
Windows/Linux to Solaris. And therefore collect info. Has anyone tried this on
a blogg? Would be cool to
Imagine 10 SATA discs in raidz2 and one or two SSD drives as a cache. Each
Vista client reaches ~90MB/sec to the server, using Solaris CIFS and iSCSI. So
you want to use iSCSI with this. (iSCSI allows ZFS to export a file system as a
native SCSI disc to a desktop PC. The desktop PC can mount
Kebabber,
You can't expose zfs filesystems over iSCSI.
You only can expose ZFS volumes (raw volumes) over iscsi.
PS: 2 weeks ago I did a few tests, using filebench.
I saw little to no improvement using a 32GB Intel X25E SSD.
Maybe this is because filebench is flushing the cache in between
How were you running this test?
were you running it locally on the machine, or were you running it over
something like NFS?
What is the rest of your storage like? just direct-attached (SAS or
SATA, for example) disks, or are you using a higher-end RAID controller?
-Greg
kristof wrote:
I understand Fishworks has a L2ARC cache, which as I have understood it, is a
SSD drive as a cache?
I have 5 terabyte discs in a raidz1. Could I add one SSD drive in a similar
vein? Would it be easy to do? What would be the impact? Has anyone tried this?
--
This message posted from
Orvar Korvar wrote:
I understand Fishworks has a L2ARC cache, which as I have understood it, is a
SSD drive as a cache?
Fishworks is an engineering team, I hear they have many L2ARCs in
their lab :-) Yes, the Sun Storage 7000 series systems can have
read-optimized SSDs for use as L2ARC
On Wed, 28 Jan 2009, Richard Elling wrote:
Orvar Korvar wrote:
I have 5 terabyte discs in a raidz1. Could I add one SSD drive in a
similar vein? Would it be easy to do?
Yes.
To be specific, you use the 'cache' argument to zpool, as in:
zpool create pool ... cache cache-device
Orvar,
In an existing RAIDZ configuration, you would add the cache device like
this:
# zpool add pool-name cache device-name
Currently, cache devices are only supported in the OpenSolaris and SXCE
releases.
The important thing is determining whether the cache device would
improve your
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