On 9/02/2014 2:37 PM, Brogyányi József wrote:
Volker
I'd like to give you some suggestions.
First the "zpool list -v" is useless code if you want to know the free
space. You try this:zfs list. You can see the real space on your server.
I assume your experience is with raidz configurations, where a raidz1
made of 4 x 3Tbyte disks would show around 10.9Tb.
I don't know the reason for this, but it is well known that the |zpool|
command counts the disks that are being used for redundancy as space,
while the |zfs| command does not.
However, mirrored configurations report the usable size correctly, so
5.44Tb is the correct size here.
Another useless thing is when you sliced your SSD and put on
rpool,cache,log.
If you want to increase your performance use standalone SSD for log
and another for cache.
What is your reasoning for this?
If the rpool is not being accessed very often, why not share the disk's
resource? - SSDs are excellent for random I/O.
I have the same setup as this on several machines, and the performance
is fine. I also need to do it because I don't have spare slots.
My experience is about rpool not sensitive for the drive speed. I use
a very slow disk for rpool and I've not notice any server performance
decrease.
But I have to say the booting time is slow and when I want to login
that is not very comfortable.
This slow things not effect any running service and copy speed from RAID.
These was a beginner experiences.
Have nice day.
Regards
Brogyi
2014.02.07. 18:20 keltezéssel, Volker A. Brandt írta:
I looked at a HP N54L today: Costs nothing, but actually handles ECC
memory. Albeit very slow memory, and not very much.
So, would it be reasonable to set this guy up with 4 2TB SATA disks,
8GB 800MHz ECC memory and run some Illumos based version with ZFS.
Yes. Note that you could also put in 2x 8GB = 16 GB. I am not
really sure what you mean by "very slow". I use Kingston PC3-10600
CL9 ECC 8 GB DIMMs.
I was thinking of putting two 2.5" small boot disks (300GB???) using
some adapter in the optical drive slot, and 4 2TB disks in a raidz
to provide 6TB of storage with medium availability performance.
Do you really need the mirrored boot?
Would this work??
Yes, altough you would have to find a sixth SATA connector for
the second small boot disk, or you would have to loop the eSATA
port back inside the case.
Would the performance be good enough to be a home
cloud server for media and/or documents?
Yes.
Is Nexenta or OmniOS or SMARTOS better or easier to deply than
OpenIndiana for this setup?
I am using OmniOS, with a 128 GB Samsung SSD as boot and cache, and
four 3TB disks in the four slots:
<nfs:/tmp,1597> cat /etc/release
OmniOS v11 r151006
Copyright 2012-2013 OmniTI Computer Consulting, Inc. All rights
reserved.
Use is subject to license terms.
<nfs:/tmp,1598> zpool list -v
NAME SIZE ALLOC FREE EXPANDSZ CAP DEDUP HEALTH ALTROOT
dpool 5.44T 2.67T 2.77T - 49% 1.00x ONLINE -
mirror 2.72T 1.33T 1.39T -
c1t0d0 - - - -
c1t2d0 - - - -
mirror 2.72T 1.33T 1.39T -
c1t1d0 - - - -
c1t3d0 - - - -
cache - - - - - -
c1t5d0s6 87.1G 3.36M 87.1G -
rpool 32G 8.87G 23.1G - 27% 1.00x ONLINE -
c1t5d0s0 32G 8.87G 23.1G -
Easy to deploy (except the "slice the SSD up into rpool and cache"
bit). Works very well.
Regards -- Volker
_______________________________________________
OpenIndiana-discuss mailing list
OpenIndiana-discuss@openindiana.org
http://openindiana.org/mailman/listinfo/openindiana-discuss
_______________________________________________
OpenIndiana-discuss mailing list
OpenIndiana-discuss@openindiana.org
http://openindiana.org/mailman/listinfo/openindiana-discuss
