On 02/20/2013 08:05 PM, Reginald Beardsley wrote:
> On an N40L running oi_151a7 w/ four ST2000DM001 drives I'm seeing
> a large drop in performance for RAIDZ2 vs RAIDZ1 which surprises me.
>
> The discussions google found were not entirely enlightening and not
> OI based. How much CPU does a smal
Please look the "load" in the top.The CPU idle time is not enough.The
difference is very huge.In your case may be the load over the "2".If am I
right then your CPU is weak for this feature.
Check again.
Brogyi
2013/2/20 Reginald Beardsley
> On an N40L running oi_151a7 w/ four ST2000DM001 drives
Hello, i set up a openindiana 151a7 server with zfs and Active Directory
authentication. I can share zfs filesystems to windows server and set
permissions to Active Directory users, no problem. The only issue is i
can only access the server over the short name "\\server\share", using
the FQDN N
Hi all,
on a fresh openindiana 151a7 installation, my realtek flapping up and
down, but for nwam is always up. The host is a laptop hp probook 4540s.
There are some known issues, acpi or similar?
tia,
bye
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> RAID-Z2 is quite CPU intensive, since it switches from XOR parity (for
> RAID-Z1) to a Reed-Solomon error-correcting code (in order to be able
> to
> survive multiple drive failures). The N40L's piddly CPU (2 cores @
> 1.4GHz) probably doesn't like that very much. 30-50% idle means 1 core
> compl
On Thu, 2013-02-21 at 17:15 +0100, Maurizio Boriani wrote:
> Hi all,
> on a fresh openindiana 151a7 installation, my realtek flapping up and
> down, but for nwam is always up. The host is a laptop hp probook 4540s.
> There are some known issues, acpi or similar?
>
> tia,
found. By setting ip:d
On 02/21/2013 06:56 PM, Roy Sigurd Karlsbakk wrote:
> Are you sure z2 uses reed-solomon? I thought it just used two-dimensional XOR
> like Raid-6
Pretty sure, unless the documentation is lying:
https://github.com/illumos/illumos-gate/blob/master/usr/src/uts/common/fs/zfs/vdev_raidz.c#L38-L45
Ch
I think last time this was asked, the consensus was that the implementation
was based on linear feedback shift registers and xor, which happens to be a
reed-solomon code (not as clear on this part, but what matters is what it
is, not what it isn't). Regardless, from reading the source previously,
Hi all,
in openindiana 151a7, the tuntap driver is:
http://www.whiteboard.ne.jp/~admin2/tuntap/
or it has its' own?
thanks,
baux
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On 02/21/2013 07:27 PM, Timothy Coalson wrote:
> I think last time this was asked, the consensus was that the implementation
> was based on linear feedback shift registers and xor, which happens to be a
> reed-solomon code (not as clear on this part, but what matters is what it
> is, not what it is
On 2013-02-21 19:40, Maurizio Boriani wrote:
Hi all,
in openindiana 151a7, the tuntap driver is:
http://www.whiteboard.ne.jp/~admin2/tuntap/
or it has its' own?
Should be it, last summer's release (1.3.0 iirc)
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On 02/21/2013 08:06 PM, Sašo Kiselkov wrote:
> On 02/21/2013 07:27 PM, Timothy Coalson wrote:
>> I think last time this was asked, the consensus was that the implementation
>> was based on linear feedback shift registers and xor, which happens to be a
>> reed-solomon code (not as clear on this part
On Thu, Feb 21, 2013 at 1:40 PM, Maurizio Boriani wrote:
> Hi all,
> in openindiana 151a7, the tuntap driver is:
>
> http://www.whiteboard.ne.jp/~admin2/tuntap/
>
> or it has its' own?
>
> thanks,
>
> baux
I have a "userland" style build for tuntap and openvpn here:
https://bitbucket.org/gwr/
On 02/21/2013 07:27 PM, Timothy Coalson wrote:
> I think last time this was asked, the consensus was that the implementation
> was based on linear feedback shift registers and xor, which happens to be a
> reed-solomon code (not as clear on this part, but what matters is what it
> is, not what it is
Wow! I'm also deeply embarrassed for not having looked at the source myself
before posting. I should have.
FWIW A 10x performance hit for double parity instead of single parity is
probably a code tuning or algorithm issue.
Have Fun!
Reg
--- On Thu, 2/21/13, Sašo Kiselkov wrote:
> From: Saš
On Thursday, February 21, 2013 10:32 PM, Armin Maier wrote:
Hello, i set up a openindiana 151a7 server with zfs and Active
Directory authentication. I can share zfs filesystems to windows
server and set permissions to Active Directory users, no problem. The
only issue is i can only access the s
The first parity uses straight XOR on uint64_t, while the second parity
performs the LFSR on all bytes in a uint64_t with some bitwise math (search
for VDEV_RAIDZ_64MUL_2) that adds up to 8 operators by my count, followed
by xor - using the LFSR lookup table on each byte might have a chance at
bein
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