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
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
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 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 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 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 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)
___
OpenIndiana-discuss mailing lis
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
Hi all,
in openindiana 151a7, the tuntap driver is:
http://www.whiteboard.ne.jp/~admin2/tuntap/
or it has its' own?
thanks,
baux
___
OpenIndiana-discuss mailing list
OpenIndiana-discuss@openindiana.org
http://openindiana.org/mailman/listinfo/openin
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,
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
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
> 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
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
___
OpenIndiana-discuss mailing list
OpenInd
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
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
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
17 matches
Mail list logo
