Re: Installing details

2012-08-05 Thread Wojciech Puchar

I am absolutely new to FreeBSD and would like a simple 'by the hand' 
explanation of how to install and use FreeBSD on a Pc. I tried to follow the 
info from its website but explanations seem too cryptic for me to understand 
properly. I'd like to try it on a empty partition of my hard drive, 
alternatively a memory stick/CD/DVD will also do. Appreciating any help.
PS - I am a regular Windows user.

so stick with it if you didn't read handbook and instalation manual which 
is NOT cryptic.


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Re: compare zfs xfs and jfs o

2012-08-05 Thread Wojciech Puchar

Hi Ashkan,

I think that XFS  JFS are more mature filesystems than ZFS, but the feature 
set of ZFS i ahead in the future. For a NFS server first I'll go with ZFS 
because the consistence in disk and speed will gonna be the differentiator.

true. it is consistently slow.

REALLY from what tale do you people get such a statements.




Look at L2ARC and ZIL to improve ZFS speed.


it's far better to just put manually heavily used things to SSD.
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Re: compare zfs xfs and jfs o

2012-08-05 Thread Wojciech Puchar

i have 16tb storage. 8x2tb sata raided.
i want to share it on network via nfs.
which file system is better for it?
thank you

badly imprecise question. you may share any filesystem.

Not sure what you want to achieve. No explanation of raided - this means 
nothing without precise description.


If you ask what i do commonly then i would do 8 gmirror-based RAID1 
volumes, and standard UFS filesystem on each with softupdates (or 
softupdates+journal).


And move as much as possible software directly to machine. Never create 
another level of indirection (like NFS) when not needed.


if you really HAVE to use NFS heavily i strongly recommend using unfsd 
from ports and patch if to AVOID constant fsync, and make sure UPS is 
installed.


NFS protocol is terrible by design (not by implementation) resulting in 
all writes being done synchronously.



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Re: ZFS bonnie puzzlement

2012-08-05 Thread Wojciech Puchar

are showing me. Read performance OTOH is strange, zpool and systat both
reporting consistently an aggregated read speed of around 120MB/s during
the block read tests (which seems a bit slow for the drives - and indeed
systat reports the drives at less than 50% utilisation) but bonnie is only
reporting 35MB/s, I see similar discrepancies with simple dd block reads
to /dev/null, in which case my stopwatch agrees with dd.

no it is not wrong.

Do more tests (possibly your own doing heavy mixed workload) to understand 
well why you should not use this last word in filesystems.


Discover it alone. I told already enough about it but it results in 
attacks from ZFS (and general new technology) fanatics.


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Re: Patent hit - MS goes after Linux - FreeBSD ?

2012-08-05 Thread Wojciech Puchar

be well within patent law to apply for a patent.


The patent office has never been very good at examining software
patents, and I have made a lot of money helping companies document the
prior art not cited in patents that are being asserted against them.

good there are people that helps.

Bad that there are patents at all. Not just in software.
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Re: Patent hit - MS goes after Linux - FreeBSD ?

2012-08-05 Thread Robert Huff


Wojciech Puchar writes:

  Bad that there are patents at all. Not just in software.

Patents are - or should be - the means, not the end.  The end
is encourage people to create new stuff; the means of encouragement
is to give them exclusive rights for a limited time.  As long as the
idea gets out there, we should be indifferent as to whether they
make money.


Robert Huff

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Re: Patent hit - MS goes after Linux - FreeBSD ?

2012-08-05 Thread Jerry
On Sun, 5 Aug 2012 08:48:56 -0400
Robert Huff articulated:

 
 
 Wojciech Puchar writes:
 
   Bad that there are patents at all. Not just in software.
 
   Patents are - or should be - the means, not the end.  The end
 is encourage people to create new stuff; the means of encouragement
 is to give them exclusive rights for a limited time.  As long as the
 idea gets out there, we should be indifferent as to whether they
 make money.

I agree up to the point about financial incentive. For myself, I like
making money. I don't apologize for that. Most engineers, software /
hardware designers also enjoy receiving a monetary reward for their
hard work. Simple giving away our hard work, sweat and time to some
socialist just because they feel they have the right to the hard work of
others is repulsive. If a monetary reward were removed from the
equation, we would probably still be using an abacus in the dark. While
we certainly should be indifferent to the financial incentive and
monetary reward someone receives; in all too many cases that is just
not so. The socialists still feel they are entitled to something for
nothing.

-- 
Jerry ♔

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Re: ZFS bonnie puzzlement

2012-08-05 Thread Steve O'Hara-Smith
On Sun, 5 Aug 2012 13:29:51 +0200 (CEST)
Wojciech Puchar woj...@wojtek.tensor.gdynia.pl wrote:

  are showing me. Read performance OTOH is strange, zpool and systat both
  reporting consistently an aggregated read speed of around 120MB/s during
  the block read tests (which seems a bit slow for the drives - and indeed
  systat reports the drives at less than 50% utilisation) but bonnie is
  only reporting 35MB/s, I see similar discrepancies with simple dd block
  reads to /dev/null, in which case my stopwatch agrees with dd.
 no it is not wrong.
 
 Do more tests (possibly your own doing heavy mixed workload) to
 understand well why you should not use this last word in filesystems.

First surprise, with only 4GB I had set primarycache=metadata,
changing that to primarycache=all caused the systat, zpool iostat and
bonnie figures all to agree - and made them all a bit better too. Lesson
from this - don't bother setting primarycache=metadata.

With that puzzle gone testing and tuning becomes more useful:

Enabling prefetch made a huge difference to the per char sequential
read, but didn't really change anything else. Indeed this test is now CPU
limited in bonnie - that'll do.

Rebooting with zfs.cache_flush_disable=1 made everything faster.
Block writes and reads maxed out the discs at around 110MB/s and 200MB/s
respectively - pretty close to the raw disc speed. Rewrite nearly doubled in
speed too.

Next stop NFS tuning.

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C:WIN  | A better way to focus the sun
The computer obeys and wins.|licences available see
You lose and Bill collects. |http://www.sohara.org/
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Re: Patent hit - MS goes after Linux - FreeBSD ?

2012-08-05 Thread Robert Huff

Jerry writes:

  I agree up to the point about financial incentive. For myself, I
  like making money. I don't apologize for that. Most engineers,
  software / hardware designers also enjoy receiving a monetary
  reward for their hard work.  Simple giving away our hard work,
  sweat and time to some socialist just because they feel they have
  the right to the hard work of others is repulsive.

Would you call Jeff Bezos (CEO of Amazon) a socialist?
Some years ago, he was giving an interview and was asked Jeff,
Amazon has applied for a patent for the One-Click system.  If Amazon had
known before it started there was no chance of receiving a patent -
would it have created One-Click anyway?
[While I'm paraphasing, the essential content is preserved.]
There was a long pause, during which you could tell Bezos
understood _precisely_ what the real question was ...
... and (to his credit) answered Yes.

The programmers got paid.
Amazon gets paid in the form of more expedient processing and
(presumably) more sales due to ease of check-out.
Why, as a society, should we deny other innovators the ability
to use that technology to develop - hopefully - even better stuff?


Robert Huff

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Re: compare zfs xfs and jfs o

2012-08-05 Thread Chad Perrin
On Sat, Aug 04, 2012 at 03:46:53PM -0500, Marco Muskus wrote:
 Hi Ashkan,
 
 I think that XFS  JFS are more mature filesystems than ZFS, but the
 feature set of ZFS i ahead in the future. For a NFS server first
 I'll go with ZFS because the consistence in disk and speed will
 gonna be the differentiator.

The idea that ZFS is faster than XFS is certainly a new one for me.  Do
you have some benchmarks for that?

-- 
Chad Perrin [ original content licensed OWL: http://owl.apotheon.org ]
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RE: ZFS bonnie puzzlement

2012-08-05 Thread Graeme Dargie


snip
Discover it alone. I told already enough about it but it results in attacks 
from ZFS (and general new technology) fanatics.

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If the rest of the world thought like you we would still be trying to invent 
the wheel.
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Re: ZFS bonnie puzzlement

2012-08-05 Thread Wojciech Puchar

First surprise, with only 4GB I had set primarycache=metadata,


you mean 4 GIGABYTES of memory is ONLY?

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Re: compare zfs xfs and jfs o

2012-08-05 Thread Wojciech Puchar

I think that XFS  JFS are more mature filesystems than ZFS, but the
feature set of ZFS i ahead in the future. For a NFS server first
I'll go with ZFS because the consistence in disk and speed will
gonna be the differentiator.


The idea that ZFS is faster than XFS is certainly a new one for me.  Do


is ZFS supposed to be faster at all?

really - stick with FreeBSD UFS. it is really best.
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RE: ZFS bonnie puzzlement

2012-08-05 Thread Wojciech Puchar


If the rest of the world thought like you we would still be trying to invent 
the wheel.

???

what wheel.

UFS is already invented. For LONG time. And UFS+softupdates works great.
much better than new trash
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Re: Patent hit - MS goes after Linux - FreeBSD ?

2012-08-05 Thread Jerry
On Sun, 5 Aug 2012 12:25:31 -0400
Robert Huff articulated:

 Jerry writes:
 
   I agree up to the point about financial incentive. For myself, I
   like making money. I don't apologize for that. Most engineers,
   software / hardware designers also enjoy receiving a monetary
   reward for their hard work.  Simple giving away our hard work,
   sweat and time to some socialist just because they feel they have
   the right to the hard work of others is repulsive.
 
   Would you call Jeff Bezos (CEO of Amazon) a socialist?
   Some years ago, he was giving an interview and was asked
 Jeff, Amazon has applied for a patent for the One-Click system.  If
 Amazon had known before it started there was no chance of receiving a
 patent - would it have created One-Click anyway?
   [While I'm paraphasing, the essential content is preserved.]
   There was a long pause, during which you could tell Bezos
 understood _precisely_ what the real question was ...
   ... and (to his credit) answered Yes.
 
   The programmers got paid.
   Amazon gets paid in the form of more expedient processing and
 (presumably) more sales due to ease of check-out.
   Why, as a society, should we deny other innovators the ability
 to use that technology to develop - hopefully - even better stuff?

You are all over the board here. Nothing ever stops anyone from doing
something for nothing. Hell, I have written some small software
applications that I never expected to make a dime off. With that said,
should I come up with some brilliant idea or killer software
applications, I fully intend to protect my rights and make as much off
of it as possible.

I never stated than anyone should be denied the right to create or write
basically whatever they so desire; however, if they are going to
piggyback their work on another author or developer's works, then that
individual deserves to receive compensation.

-- 
Jerry ♔

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Re: ZFS bonnie puzzlement

2012-08-05 Thread Steve O'Hara-Smith
On Sun, 5 Aug 2012 20:02:54 +0200 (CEST)
Wojciech Puchar woj...@wojtek.tensor.gdynia.pl wrote:

  First surprise, with only 4GB I had set primarycache=metadata,
 
 you mean 4 GIGABYTES of memory is ONLY?

At less than €30 - yes I think only is reasonable, I'd have bought
more but 4GB is all the motherboard would take. I've paid more than that for
a *KILOBYTE* of memory - admittedly that was a long time ago.

One big part of the changing landscape in computer economics is
that RAM and disc are *cheap*.

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C:WIN  | A better way to focus the sun
The computer obeys and wins.|licences available see
You lose and Bill collects. |http://www.sohara.org/
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Webpage screenshot

2012-08-05 Thread Polytropon
I'm searching for a simple way to create a screenshot from
a web page, i. e. convert the rendered page into a PNG (or
something similar) graphic format. This is intended to be
used for usability and design visualization where different
components of the web page can be colored using Gimp to
show their structure by inking the different elements.

The idea of taking a screenshot from the web browser may
look sufficient at first, but it is problematic when the
web page doesn't fit horizontally or vertically. This
sometimes doesn't even work when using the browser in
total fullscreen (which is 1400x1050 or 2800x1050 here).
Using the browsers print to PS functionaliy also add
pagination that is not desired, and continuous form
printing export doesn't exist.

How would you suggest to solve this task? CLI utilities
are welcome - the less interaction, the better. It doesn't
matter if the result is a 800x1 px image with 300 px
white margin left and right. :-)


-- 
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
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Re: Webpage screenshot

2012-08-05 Thread Kurt Buff
On Sun, Aug 5, 2012 at 11:41 AM, Polytropon free...@edvax.de wrote:
 I'm searching for a simple way to create a screenshot from
 a web page, i. e. convert the rendered page into a PNG (or
 something similar) graphic format. This is intended to be
 used for usability and design visualization where different
 components of the web page can be colored using Gimp to
 show their structure by inking the different elements.

 The idea of taking a screenshot from the web browser may
 look sufficient at first, but it is problematic when the
 web page doesn't fit horizontally or vertically. This
 sometimes doesn't even work when using the browser in
 total fullscreen (which is 1400x1050 or 2800x1050 here).
 Using the browsers print to PS functionaliy also add
 pagination that is not desired, and continuous form
 printing export doesn't exist.

 How would you suggest to solve this task? CLI utilities
 are welcome - the less interaction, the better. It doesn't
 matter if the result is a 800x1 px image with 300 px
 white margin left and right. :-)

If you're using Firefox, the Fireshot addin does exactly this kind of thing.

Kurt
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Re: Patent hit - MS goes after Linux - FreeBSD ?

2012-08-05 Thread C. P. Ghost
On Sun, Aug 5, 2012 at 8:15 PM, Jerry je...@seibercom.net wrote:
 I never stated than anyone should be denied the right to create or write
 basically whatever they so desire; however, if they are going to
 piggyback their work on another author or developer's works, then that
 individual deserves to receive compensation.

The point here is that an INDIVIDUAL deserves compensation.

Whether some mega corp with a huge portfolio of patents deserves
the same is to be questioned. Especially considering that those huge
mega corps use those patents to stomp all over the little (programmer)
guy and destroy his little livelihood. That's what patents were initially
designed to prevent: that some predatory industrial magnate would
steal the idea of the little inventor to make a profit, without compensating
the inventor for his ideas.

Sadly, this principle (protecting the little inventors) has been turned
upside-down due to the abysmal performance of the Patent Office
examiners who rubber stamping just about every patent application
with the words machinery for ... in it.

-cpghost.

-- 
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Re: Webpage screenshot

2012-08-05 Thread Mike Clarke
On Sunday 05 August 2012 19:41:38 Polytropon wrote:

 The idea of taking a screenshot from the web browser may
 look sufficient at first, but it is problematic when the
 web page doesn't fit horizontally or vertically

snip

 How would you suggest to solve this task?

How about the Pixlr Grabber extension for Firefox. You can specify the entire 
page, an area defined with the mouse or just the visible area and save the 
result to a .PNG file or copy it to the clipboard to paste directly into the 
Gimp.

-- 
Mike Clarke
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Re: Webpage screenshot

2012-08-05 Thread Frank Reppin

Hi all,

On 05.08.2012 20:41, Polytropon wrote:
[website to picture cli]

google search comes up with

  http://code.google.com/p/wkhtmltopdf/

which also provides a download called

  wkhtmltoimage

... which in turn seems to be what you want.

cheers,
frank\

--
43rd Law of Computing:
Anything that can go wr
fortune: Segmentation violation -- Core dumped
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Re: Webpage screenshot

2012-08-05 Thread C. P. Ghost
On Sun, Aug 5, 2012 at 8:41 PM, Polytropon free...@edvax.de wrote:
 I'm searching for a simple way to create a screenshot from
 a web page, i. e. convert the rendered page into a PNG (or
 something similar) graphic format. This is intended to be
 used for usability and design visualization where different
 components of the web page can be colored using Gimp to
 show their structure by inking the different elements.

 The idea of taking a screenshot from the web browser may
 look sufficient at first, but it is problematic when the
 web page doesn't fit horizontally or vertically. This
 sometimes doesn't even work when using the browser in
 total fullscreen (which is 1400x1050 or 2800x1050 here).
 Using the browsers print to PS functionaliy also add
 pagination that is not desired, and continuous form
 printing export doesn't exist.

 How would you suggest to solve this task? CLI utilities
 are welcome - the less interaction, the better. It doesn't
 matter if the result is a 800x1 px image with 300 px
 white margin left and right. :-)

I'm still using xwd(1) to grab a window (using -frame to add
the decoration of the window manager) here, and convert it
then to .png with the Gimp. Of course, I take care of displaying
just the interesting part of the web page that I need by scrolling
to the interesting part.

If you need a complete snapshot of the page, you may try this:
open Firefox with some insane big -geometry settings, perhaps
to a big virtual screen in X; and then grab that whole window
with xwd(1). I didn't try that, but it may be enough. If your X server
won't handle this big a screen, try with a nesting server like
x11-servers/xorg-nestserver.

Good luck!

 Polytropon
 Magdeburg, Germany
 Happy FreeBSD user since 4.0
 Andra moi ennepe, Mousa, ...

-cpghost.

-- 
Cordula's Web. http://www.cordula.ws/
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Re: compare zfs xfs and jfs o

2012-08-05 Thread Marco Muskus

El 05/08/12 06:22, Wojciech Puchar escribió:

Hi Ashkan,

I think that XFS  JFS are more mature filesystems than ZFS, but the 
feature set of ZFS i ahead in the future. For a NFS server first I'll 
go with ZFS because the consistence in disk and speed will gonna be 
the differentiator.

true. it is consistently slow.

REALLY from what tale do you people get such a statements.


There is no tale, only a feature set:
http://en.wikipedia.org/wiki/Zfs#Features






Look at L2ARC and ZIL to improve ZFS speed.


it's far better to just put manually heavily used things to SSD.



Yes ! That's what actually ZFS do with SSD put the most used elements on it.
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Re: compare zfs xfs and jfs o

2012-08-05 Thread Marco Muskus

El 05/08/12 13:03, Wojciech Puchar escribió:

I think that XFS  JFS are more mature filesystems than ZFS, but the
feature set of ZFS i ahead in the future. For a NFS server first
I'll go with ZFS because the consistence in disk and speed will
gonna be the differentiator.


The idea that ZFS is faster than XFS is certainly a new one for me.  Do


is ZFS supposed to be faster at all?

really - stick with FreeBSD UFS. it is really best.


Yes UFS is very good, but very hight IO ZFS is fastest if you use 
L2ARC/ZIL on SSD.


There is no doubt in the benefits of SSD on the fileservers (SMB, NFS,etc.)


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Re: compare zfs xfs and jfs o

2012-08-05 Thread Wojciech Puchar

really - stick with FreeBSD UFS. it is really best.


Yes UFS is very good, but very hight IO ZFS is fastest if you use L2ARC/ZIL 
on SSD.

if...

better just move heavy used things on SSD and rest on HDD. really it's 
fastest.



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Re: compare zfs xfs and jfs o

2012-08-05 Thread Wojciech Puchar
with ZFS because the consistence in disk and speed will gonna be the 
differentiator.

true. it is consistently slow.

REALLY from what tale do you people get such a statements.


There is no tale, only a feature set:
http://en.wikipedia.org/wiki/Zfs#Features



And everything everyone writes is always true.
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Re: Patent hit - MS goes after Linux - FreeBSD ?

2012-08-05 Thread Mario Lobo
On Sun, 5 Aug 2012 09:33:20 -0400
Jerry je...@seibercom.net wrote:

 On Sun, 5 Aug 2012 08:48:56 -0400
 Robert Huff articulated:
 

[Snip]

 The socialists still feel they are entitled to something
 for nothing.
 

Jerry;

Forgive me for barging in like this but to me, what your sentence
describes is just plain good old greedy people. Patents provided
the perfect LEGAL way for these very people to make theirs, an idea that
they didn't think of or had the gift/talent to create, as a quickie
for profit. The result: Now the long patent arm reaches fruit, seeds
and DNA. This means that I can't create a Graviola juice drink (local
Brazilian fruit) because a Japanese guy patented the fruit !! How
ridiculous did we allowed this to get?

On a final note, if your sentence were to reflect a little better the
idea of socialism (at least on paper), it should read:

The socialists still feel that everybody is entitled to something
for nothing.

Unfortunately today, socialism, democracy, communism or liberalism are
mere skins for hungry wolves.

-- 
Mario Lobo
http://www.mallavoodoo.com.br
FreeBSD since 2.2.8 [not Pro-Audio YET!!] (99% winblows FREE)
 
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Re: compare zfs xfs and jfs o

2012-08-05 Thread Anonymous Remailer (austria)

  I think that XFS  JFS are more mature filesystems than ZFS

This is not up for discussion.

 but the feature set of ZFS i ahead in the future. 

Too many iPads, iPhones, etc?

 For a NFS server first I'll go with ZFS because the consistence in disk

If not spelling, or grammar...

 and speed will gonna be the differentiator.

A high-school education may well have been the differentiator, but that's
not important right now. Journaling filesystems are not known for speed.
EXT2 will probably outperform ZFS as far as NFS servers go.

--
Speed Will Gonna
Be The Differentiator

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questions on the use of moused for Xorg

2012-08-05 Thread Martin Alejandro Paredes Sanchez

when you must use the parameter -z of moused?

I had an Apple Mighty Mouse and I would like to use the track ball (the wheel
part)

The driver UMS detects the Z Axis and the Wheel [XYZW]

ums0: Mitsumi Electric Apple Optical USB Mouse, class 0/0, rev 1.10/1.08, addr 
4 on usbus1
ums0: 4 buttons and [XYZW] coordinates ID=0

When I run this command

/usr/sbin/moused -f -d -p /dev/ums0 -t auto -I /var/run/moused.ums0.pid

moused reports movements in XYZ (dx dy dz) but not W (dz?), in Xorg the scroll
(vertical) works OK (xev reports events for button 4 and 5), but no horizontal
(xev doesn't report anything)

When I run this command

/usr/sbin/moused -f -d -z 4 5 6 7 -p /dev/ums0 -t auto -I 
/var/run/moused.ums0.pid

moused reports movements in XY (dx dy) but not ZW (dz), for Z now reports
buttons 4 and 5 pressed, in Xorg the scroll (vertical) does not work (xev
reports events for button 8 and 9), and no horizontal (xev doesn't report
anything)

Here is the mouse part of my x11-input.fdi file

match key=info.capabilities contains=input.mouse
  merge key=input.x11_options.Protocol type=stringSysMouse/merge
  merge key=input.x11_options.Emulate3Buttons type=stringOff/merge
  merge key=input.x11_options.Buttons type=string8/merge
/match

But in Xorg.0.log I see conflicts with the configuration, the lines that begin
with (**) Apple Optical USB Mouse:, where they come from?

(EE) config/hal: couldn't initialise context: unknown error (null)
(II) config/hal: Adding input device Apple Optical USB Mouse
(II) LoadModule: mouse
(II) Loading /usr/local/lib/xorg/modules/input/mouse_drv.so
(II) Module mouse: vendor=X.Org Foundation
compiled for 1.7.5, module version = 1.5.0
Module class: X.Org XInput Driver
ABI class: X.Org XInput driver, version 7.0
(**) Option Protocol SysMouse
(**) Apple Optical USB Mouse: Device: /dev/sysmouse
(**) Apple Optical USB Mouse: Protocol: SysMouse
(**) Apple Optical USB Mouse: always reports core events
(**) Option Device /dev/sysmouse
(**) Option BaudRate 1200
(**) Option StopBits 2
(**) Option DataBits 8
(**) Option Parity None
(**) Option Vmin 1
(**) Option Vtime 0
(**) Option FlowControl None
(**) Option Buttons 8
(**) Option Emulate3Buttons Off
(**) Apple Optical USB Mouse: ZAxisMapping: buttons 4 and 5
(**) Apple Optical USB Mouse: Buttons: 12
(**) Apple Optical USB Mouse: Sensitivity: 1
(**) Apple Optical USB Mouse: BaudRate: 1200
(II) XINPUT: Adding extended input device Apple Optical USB Mouse (type: 
MOUSE)
(**) Apple Optical USB Mouse: (accel) keeping acceleration scheme 1
(**) Apple Optical USB Mouse: (accel) acceleration profile 0
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Re: compare zfs xfs and jfs o

2012-08-05 Thread Daniel Staal
--As of August 5, 2012 10:29:16 AM -0600, Chad Perrin is alleged to have 
said:



I think that XFS  JFS are more mature filesystems than ZFS, but the
feature set of ZFS i ahead in the future. For a NFS server first
I'll go with ZFS because the consistence in disk and speed will
gonna be the differentiator.


The idea that ZFS is faster than XFS is certainly a new one for me.  Do
you have some benchmarks for that?


--As for the rest, it is mine.

Particularly in this use-case: From my reading ZFS has a performance hit 
when used as a base filesystem for NFS.  (Largely because it insists on 
*actually following* the NFS spec, and not taking some shortcuts that are 
common elsewhere...)  Not that I have tested that, even on my NFS server. 
(Which runs ZFS - there are other excellent reasons to use it, and speed 
isn't a major concern for that particular box.)


Daniel T. Staal

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