I may have RAIDZ reading wrong here. Perhaps someone could clarify.
For a read-only workload, does each RAIDZ drive act like a stripe, similar to
RAID5/6? Do they have independant queues?
It would seem that there is no escaping read/modify/write operations for
sub-block writes, forcing the
RAIDZ has to rebuild data by reading all drives in the group, and
reconstructing from parity. Mirrors simply copy a drive.
Compare 3tb mirros vs. 9x3tb RAIDZ2.
Mirrors:
Read 3tb
Write 3tb
RAIDZ2:
Read 24tb
Reconstruct data on CPU
Write 3tb
In this case, RAIDZ is at least 8x slower to
I may have RAIDZ reading wrong here. Perhaps someone
could clarify.
For a read-only workload, does each RAIDZ drive act
like a stripe, similar to RAID5/6? Do they have
independant queues?
It would seem that there is no escaping
read/modify/write operations for sub-block writes,
as there are no writes in the queue).
Perhaps you are saying that they act like stripes for bandwidth purposes, but
not for read ops/sec?
-Rob
-Original Message-
From: Bob Friesenhahn [mailto:bfrie...@simple.dallas.tx.us]
Sent: Saturday, August 06, 2011 11:41 AM
To: Rob Cohen
Cc: zfs-discuss
If I'm not mistaken, a 3-way mirror is not
implemented behind the scenes in
the same way as a 3-disk raidz3. You should use a
3-way mirror instead of a
3-disk raidz3.
RAIDZ2 requires at least 4 drives, and RAIDZ3 requires at least 5 drives. But,
yes, a 3-way mirror is implemented totally
Generally, mirrors resilver MUCH faster than RAIDZ, and you only lose
redundancy on that stripe, so combined, you're much closer to RAIDZ2 odds than
you might think, especially with hot spare(s), which I'd reccommend.
When you're talking about IOPS, each stripe can support 1 simultanious user.
Try mirrors. You will get much better multi-user performance, and you can
easily split the mirrors across enclosures.
If your priority is performance over capacity, you could experiment with n-way
mirros, since more mirrors will load balance reads better than more stripes.
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plus virtualbox 4.1 with network in a box would like snv_159
from http://www.virtualbox.org/wiki/Changelog
Solaris hosts: New Crossbow based bridged networking driver for Solaris 11
build 159 and above
Rob
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. Are any of these types of
document made public to assist in understanding at a higher level than the
source code? Again, this is really to help me understand the system, rather
than to attempt any modification.
Regards
Rob
-Original Message-
From: Darren J Moffat [mailto:darr
, I
do not consider this approach operable.)
Regarding tampering and tamper detection, when the disks are transported, we
do not rely on an IT approach to these issues.
Regards,
Rob
-Original Message-
From: Daniel Carosone [mailto:d...@geek.com.au]
Sent: 28 April 2011 03:21
To: Rob O'Leary
writing issues and these are momentus sata disks
(despite link names below). Can I mix sas and sata in the same controller?
Reliable, SAS, FDE does not seem to be available...
Regards,
Rob
http://forums.seagate.com/t5/Barracuda-XT-Barracuda-and/Issues-with-ST932032
2AS-FDE-3-drives/m-p/29247#M12876
References:
Thread: ZFS effective short-stroking and connection to thin provisioning?
http://opensolaris.org/jive/thread.jspa?threadID=127608
Confused about consumer drives and zfs can someone help?
http://opensolaris.org/jive/thread.jspa?threadID=132253
Recommended RAM for ZFS on various
problem, or a
Solaris bug.
- Rob
I have 15x SAS drives in a Dell MD1000 enclosure,
attached to an LSI 9200-16e. This has been working
well. The system is boothing off of internal drives,
on a Dell SAS 6ir.
I just tried to add a second storage enclosure, with
15 more SAS drives
should be warm by now, and my SSDs are far from
full.
set zfs:l2arc_noprefetch = 0
Am I setting this wrong? Am misunderstanding this option?
Thanks,
Rob
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? Is there a
special way to configure one of these LSI boards?
Thanks,
Rob
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Markus,
I'm pretty sure that I have the MD1000 plugged in properly, especially since
the same connection works on the 9280 and Perc 6/e. It's not in split mode.
Thanks for the suggestion, though.
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:05 /kernel/drv/amd64/mpt
-rwxr-xr-x 1 root sys 399952 Nov 15 23:06 /kernel/drv/amd64/mpt_sas
and mpt_sas has a new printf:
reset was running, this event can not be handled this time
Rob
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, and the rest fits in L2ARC,
performance will be good.
Thanks,
Rob
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share
L2ARC and ZIL devices, rather than buy two sets.
It appears possible to set up 7x450gb mirrored sets and 7x600gb mirrored sets
in the same volume, without losing capacity. Is that a bad idea? Is there a
problem with having different stripe sizes, like this?
Thanks,
Rob
Thanks, Ian.
If I understand correctly, the performance would then drop to the same level as
if I set them up as separate volumes in the first place.
So, I get double the performance for 75% of my data, and equal performance for
25% of my data, and my L2ARC will adapt to my working set across
into my Box so please suggest options that use less than that many (most
prefefably less than 7).
A: ?
Thanks,
Rob
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I'm building my new storage server, all the parts should come in this week.
...
Another answer is here:
http://eonstorage.blogspot.com/2010/03/whats-best-pool-to-build-with-3-or-4.html
Rob
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I wanted to build a small back up (maybe also NAS) server using
A common question that I am trying to get answered (and have a few) here:
http://www.opensolaris.org/jive/thread.jspa?threadID=102368tstart=0
Rob
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Memory Slots in which to add more
Chips (which you are certain to want to do in the future).
Rob
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- as opposed to over three dozen tiny Drives).
Thanks for your reply,
Rob
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Roy,
Thanks for your reply.
I did get a new drive and attempted the approach (as you have suggested pre
your reply) however once booted off the OpenSolaris Live CD (or the rebuilt new
drive), I was not able to import the rpool (which I had established had sector
errors). I expect I should
Folks I posted this question on (OpenSolaris - Help) without any replies
http://opensolaris.org/jive/thread.jspa?threadID=129436tstart=0 and am
re-posting here in the hope someone can help ... I have updated the wording a
little too (in an attempt to clarify)
I currently use OpenSolaris on a
, but when the file system
gets above 80% we seems to have quite a number of issues, much the same as what
you've had in the past, ps and prstats hanging.
are you able to tell me the IDR number that you applied?
Thanks,
Rob
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)
ff000f4efbb0 smb_session_worker+0x6e(ff02fa4b0058)
ff000f4efc40 taskq_d_thread+0xb1(ff02e51b9e90)
ff000f4efc50 thread_start+8()
I can provide any other info that may be need. Thank you in advance for your
help!
Rob
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zpool add test cache /dev/zvol/dsk/rpool/cache
reboot
if your asking for a L2ARC on rpool, well, yea, its not mounted soon enough,
but the
point is to put rpool, swap, and L2ARC for your storage pool all on a single
SSD..
Rob
will not be there
when the box comes back, even though your program had finished seconds
before the crash.
Rob
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?
Rob
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I like the idea of swapping on SSD too, but why not make a zvol for the L2ARC
so your not limited by the hard partitioning?
it lives through a reboot..
zpool create -f test c9t3d0s0 c9t4d0s0
zfs create -V 3G rpool/cache
zpool add test cache /dev/zvol/dsk/rpool/cache
reboot
Can a ZFS send stream become corrupt when piped between two hosts across a WAN
link using 'ssh'?
For example a host in Australia sends a stream to a host in the UK as follows:
# zfs send tank/f...@now | ssh host.uk receive tank/bar
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might be the loss of their
entire dataset.
Rob
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!
Rob
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=N82E16820139050
But we are still stuck at 8G without going to expensive ram or
a more expensive CPU.
Rob
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.
Rob
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, that 667Mhz simm runs at 533Mhz
with AMD. The same is true for Lynnfield if one uses Registered
DDR3, one only gets 800Mhz with all 6 slots. (single or dual rank)
Regardless, for zfs, memory is more important than raw CPU
agreed! but everything must be balanced.
Rob
://www.newegg.com/Product/Product.aspx?Item=N82E16819115214
Now, this gets one to 8G ECC easily...AMD's unfair advantage is all those
ram slots on their multi-die MBs... A slow AMD cpu with 64G ram
might be better depending on your working set / dedup requirements.
Rob
shares their research and we can build on it.
(btw, netapp ontap 8 is freebsd, and runs on std hardware
after alittle bios work :-)
Rob
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a 1U or 2U JBOD chassis for 2.5 drives,
from http://supermicro.com/products/nfo/chassis_storage.cfm
the E1 (single) or E2 (dual) options have a SAS expander so
http://supermicro.com/products/chassis/2U/?chs=216
fits your build or build it your self with
By partitioning the first two drives, you can arrange to have a small
zfs-boot mirrored pool on the first two drives, and then create a second
pool as two mirror pairs, or four drives in a raidz to support your data.
agreed..
2 % zpool iostat -v
capacity operations
some other stuff to give the
system some load it hangs. This happens after 5 minutes or after 30 minutes or
later but it hangs. Then we get the problems of the attached pictures.
I have also emaild Areca. I'll hope the can fix it..
Regards,
Rob
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this one has me alittle confused. ideas?
j...@opensolaris:~# zpool import z
cannot mount 'z/nukeme': mountpoint or dataset is busy
cannot share 'z/cle2003-1': smb add share failed
j...@opensolaris:~# zfs destroy z/nukeme
internal error: Bad exchange descriptor
Abort (core dumped)
I can report io errors with Chenbro based LSI SASx36 IC based
expanders tested with 111b/121/128a/129. The HBA was LSI 1068 based.
If I bypass expander by adding more HBA controllers, mpt does not have
io errors.
-nola
On Dec 8, 2009, at 6:48 AM, Bruno Sousa wrote:
Hi James,
Thank
How can we help with what is outlined below. I can reproduce these at will, so
if anyone at Sun would like an environment to test this situation let me know.
What is the best info to grab for you folks to help here?
Thanks - nola
This is in regard to these threads:
a tinny slice on all the disks of the raidz2
and list six log devices (6 way stripe) and not bother
adding the other two disks.
Rob
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if there is a LSI issue with too many links in HBA mode?
Rob
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on shared PCI in a raidz
we know disk don't go that fast anyway, but going from a 8h to 15h
scrub is very reasonable depending on vdev config.
Rob
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http
.
Rob
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from a two disk (10krpm) mirror layout to a three disk raidz-1.
wrights will be unnoticeably slower for raidz1 because of parity calculation
and latency of a third spindle. but reads will be 1/2 the speed
of the mirror because it can split the reads between two disks.
another way to say the
frequent snapshots offer outstanding oops protection.
Rob
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Maybe to create snapshots after the fact
how does one quiesce a drive after the fact?
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Latushkin to attempt to recover your pool using painstaking manual
manipulation.
Recent putbacks seem to indicate that future releases will provide a mechanism
to allow mere mortals to recover from some of the errors caused by dropped
writes.
cheers,
Rob
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good find Henrik!
Rob
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Action: Restore the file in question if possible. Otherwise restore
the
entire pool from backup.
metadata:0x0
metadata:0x15
bet its in a snapshot that looks to have been destroyed already. try
zpool clear POOL01
zpool scrub POOL01
?u_ghost is a small %, there is no point in adding an L2ARC.
if you do add a L2ARC, one must have ram between c and zfs_arc_max for its
pointers.
Rob
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http
Folks,
Need help with ZFS recovery following zfs create ...
We recently received new laptops (hardware refresh) and I simply transfered the
multiboot hdd (using OpenSolaris 2008.11 as the primary production OS) from the
old laptop to the new one (used the live DVD to do the zpool import,
pointed at VirtualBox's hardware implementation.
as for ZFS requiring better hardware, you could turn
off checksums and other protections so one isn't notified
of issues making it act like the others.
Rob
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: 0.07, 0.05, 0.05
r...@pdm # date
Mon Jul 20 09:33:07 EDT 2009
r...@pdm # uname -a
SunOS pdm 5.9 Generic_112233-12 sun4u sparc SUNW,Ultra-250
Rob
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c4 scsi-bus connectedconfigured unknown
c4::dsk/c4t15d0disk connectedconfigured unknown
:
c4::dsk/c4t33d0disk connectedconfigured unknown
c4::es/ses0ESI connected
CPU is smoothed out quite a lot
yes, but the area under the CPU graph is less, so the
rate of real work performed is less, so the entire
job took longer. (allbeit smoother)
Rob
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14 1 877K 94.2K
c1t1d0s7 244G 200G 15 2 948K 96.5K
c0d0 193G 39.1G 10 1 689K 80.2K
note that c0d0 is basically full, but still serving 10
of every 15 reads, and 82% of the writes.
Rob
This appears to be the fix related to the ACL's which they seem to throw all of
the ASSERT panics in zfs_fuid.c under even if they have nothing to do with
ACL's; my case being one of those.
Thanks for the pointer though!
-Rob
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and
there is a stealthy patch ID that can fix the issue.
Thanks,
-Rob
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correct ratio of arc to l2arc?
from http://blogs.sun.com/brendan/entry/l2arc_screenshots
It costs some DRAM to reference the L2ARC, at a rate proportional to record
size.
For example, it currently takes about 15 Gbytes of DRAM to reference 600 Gbytes
of
L2ARC - at an 8 Kbyte ZFS record size.
in the same port too as you go.
It is still the same size. I would expect it to go to 9G.
a reboot or export/import would have fixed this.
cannot import 'grow': no such pool available
you meant to type
zpool import -d /var/tmp grow
Rob
can't be faster than the slowest
disk in the set as its one vdev... I would have expected
the 8 vdev set to be 8x faster than the single raidz[12]
set, but like Richard said, there is another bottle
neck in there that iostat will show.
Rob
.
ie: pls don't discount how one arranges the vdev
in a given configuration.
Rob
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When I type `zpool import` to see what pools are out there, it gets to
/1: open(/dev/dsk/c5t2d0s0, O_RDONLY) = 6
/1: stat64(/usr/local/apache2/lib/libdevid.so.1, 0x08042758) Err#2 ENOENT
/1: stat64(/usr/lib/libdevid.so.1, 0x08042758)= 0
/1: d=0x02D90002
Not. Intel decided we don't need ECC memory on the Core i7
I thought that was a Core i7 vs Xeon E55xx for socket
LGA-1366 so that's why this X58 MB claims ECC support:
http://supermicro.com/products/motherboard/Xeon3000/X58/X8SAX.cfm
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Thanks Nathan,
I want to test the underlying performance, of course the problem is I want
to test the 16 or so disks in the stripe, rather than individual devices.
Thanks
Rob
On 28/01/2009 22:23, Nathan Kroenert nathan.kroen...@sun.com wrote:
Also - My experience with a very small ARC
Solaris 10U4 which doesn¹t have them -can I disable it?
Many thanks
Rob
| Robert Brown - ioko Professional Services |
| Mobile: +44 (0)7769 711 885 |
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ZFS is the bomb. It's a great file system. What are it's real world
applications besides solaris userspace? What I'd really like is to utilize the
benefits of ZFS across all the platforms we use. For instance, we use Microsoft
Windows Servers as our primary platform here. How might I utilize
I am not experienced with iSCSI. I understand it's block level disk access via
TCP/IP. However I don't see how using it eliminates the need for virtualization.
Are you saying that a Windows Server can access a ZFS drive via iSCSI and store
NTFS files?
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Wow. I will read further into this. That seems like it could have great
applications. I assume the same is true of FCoE?
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the sata framework uses the sd driver so its:
4 % smartctl -d scsi -a /dev/rdsk/c4t2d0s0
smartctl version 5.36 [i386-pc-solaris2.8] Copyright (C) 2002-6 Bruce Allen
Home page is http://smartmontools.sourceforge.net/
Device: ATA WDC WD1001FALS-0 Version: 0K05
Serial number:
Device type:
(with iostat -xtc 1)
it sure would be nice to know if actv 0 so
we would know if the lun was busy because
its queue is full or just slow (svc_t 200)
for tracking errors try `iostat -xcen 1`
and `iostat -E`
Rob
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ATA WDC WD3200JD-00K 5J08 0 C (32 F) Solaris2
Do you know of a solaris tool to get SMART data?
Rob
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Bump.
Some of the threads on this were last posted to over a year ago. I checked
6485689 and it is not fixed yet, is there any work being done in this area?
Thanks,
Rob
There may be some work being done to fix this:
zpool should support raidz of mirrors
http://bugs.opensolaris.org
WD Caviar Black drive [...] Intel E7200 2.53GHz 3MB L2
The P45 based boards are a no-brainer
16G of DDR2-1066 with P45 or
8G of ECC DDR2-800 with 3210 based boards
That is the question.
Rob
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zfs
/
non-ECC SDRAM.
http://www.intel.com/products/server/chipsets/3200-3210/3200-3210-overview.htm
Rob
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ECC?
$60 unbuffered 4GB 800MHz DDR2 ECC CL5 DIMM (Kit Of 2)
http://www.provantage.com/kingston-technology-kvr800d2e5k2-4g~7KIN90H4.htm
for Intel 32x0 north bridge like
http://www.provantage.com/supermicro-x7sbe~7SUPM11K.htm
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The other changes that will appear in 0.11 (which is
nearly done) are:
Still looking forward to seeing .11 :)
Think we can expect a release soon? (or at least svn access so that others can
check out the trunk?)
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Hello All!
Is there a command to force a re-inheritance/reset of ACLs? e.g., if i have a
directory full of folders that have been created with inherited ACLs, and i
want to change the ACLs on the parent folder, how can i force a reapply of all
ACLs?
This message posted from opensolaris.org
Rob wrote:
Hello All!
Is there a command to force a re-inheritance/reset
of ACLs? e.g., if i have a directory full of folders
that have been created with inherited ACLs, and i
want to change the ACLs on the parent folder, how can
i force a reapply of all ACLs?
There isn't
There may be some work being done to fix this:
zpool should support raidz of mirrors
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6485689
Discussed in this thread:
Mirrored Raidz ( Posted: Oct 19, 2006 9:02 PM )
http://opensolaris.org/jive/thread.jspa?threadID=15854tstart=0
'safe' (and if not, jumping backout).
Thus, Mertol, it is possible (and could work very well).
Rob
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to suggest adding ZFS
there instead of focusing on non-ZFS solutions in this ZFS discussion group.
Rob
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faster than they can afford to buy new ones:
Venti Filesystem
http://www.cs.bell-labs.com/who/seanq/p9trace.html
Rob
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Solaris will allow you to do this, but you'll need to use SVM instead of ZFS.
Or, I suppose, you could use SVM for RAID-5 and ZFS to mirror those.
-- richard
Or run Linux ...
Richard, The ZFS Best Practices Guide says not.
Do not use the same disk or slice in both an SVM and ZFS
://www.codeproject.com/KB/recipes/ppmd.aspx
Rob
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(NMF) - so add it or you'll 404).
Rob
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-Peter Tribble wrote:
On Sun, Jul 6, 2008 at 8:48 AM, Rob Clark wrote:
I have eight 10GB drives.
...
I have 6 remaining 10 GB drives and I desire to
raid 3 of them and mirror them to the other 3 to
give me raid security and integrity with mirrored
drive performance. I then want to move my
On July 14, 2008 7:49:58 PM -0500 Bob Friesenhahn
[EMAIL PROTECTED] wrote:
With ZFS and modern CPUs, the parity calculation is
surely in the noise to the point of being unmeasurable.
I would agree with that. The parity calculation has *never* been a
factor in and of itself. The
Peter Tribble wrote:
Because what you've created is a pool containing two
components:
- a 3-drive raidz
- a 3-drive mirror
concatenated together.
OK. Seems odd that ZFS would allow that (would people want that configuration
instead of what I am attempting to do).
I think that what
I'd like to take a backup of a live filesystem without modifying
the last accessed time.
why not take a snapshot?
Rob
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