Re: Quick DNS perfromance measurement trick

2008-07-10 Thread Michael ODonnell


I tried the specified command from three different sites and
they all gave essentially identical responses:

   "aaa.bbb.ccc.ddd is POOR: 26 queries in 3.1 seconds from 1 ports with std 
dev 0.00"

That aaa.bbb.ccc.ddd address seems to be the (possibly NAT'd) IP
addr that the target site sees mentioned in the inbound packets;
I have no idea about the rest of it...
 
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Re: How to troubleshoot wide area network performance problem?

2008-07-10 Thread Bruce Dawson
Alex Hewitt wrote:
> I have clients with an interesting network problem. One location in
> Bedford New Hampshire using a fractionated T1 has routinely been
> transmitting studies to an office in Nashua New Hampshire. There have
> been no problems with this for at least 18 months. However recently
> (about a week ago), the transmissions suddenly became slow, really slow.
> A transmission that was taking around 10 minutes suddenly jumped to 2-3
> hours. The customer in Bedford New Hampshire is using One
> Communications. So far I haven't asked them to look at this problem
> because I've been trying to clarify it. The office in Nashua has
> Comcast business class service with a static IP address. 
>
> Here's where it gets interesting. I had the Bedford client transmit the
> data to my system in Manchester New Hampshire. I have Comcast
> residential service. The data usually takes about 8 minutes to arrive at
> my location. I then send the data to the Nashua office and it typically
> takes 25-30 minutes. The payload is a collection of images that are
> typically between 65 and 70 MB. 
>   

That sounds like typical asymmetric cable modem connection.
> Today Comcast at the request of the customer sent someone on site to the
> Nashua site. The tech did some speed tests using the DSLReports
> Speakeasy test suite. He was getting  20 mbs down, 3+ mbs up which is
> pretty decent. For the fun of it I had him download a 47 MB antivirus
> program. His first try was ridiculous telling him it was going to take 4
> + hours. I had him break the connection and try again and this time the
> download took around a minute.
>   

Its hard to tell if that problem was on the server end or some router
between the local and remote system.
> And it gets more interesting...another client in Salem New Hampshire
> needed to send their data to the Nashua site (they use Verizon DSL). It
> arrived in about 8 minutes.
>   
This would imply the Nashua site is OK.
> So my Comcast connection which is fairly decent is taking a half hour to
> send 65-70 MB to the Nashua site. The Salem site is taking 8 minutes for
> something approximately the same size and the Bedford site is taking
> several hours.
>   

Before paying for a tech to go to the Bedford site, I would try a
*short* flood ping to the ISP's first advertised router (short = 5
seconds) and see what sort of loss you get. This will tell you if the
problem is in the ISP's on-site equipment (and if so, the tech can
diagnose it). Then try pinging to the first router outside of the ISP's
network. This should tell you if the problem is inside/outside the ISP
network. Armed with this info, you can then call the Bedford ISP and ask
them what's going on.
> Traceroute doesn't show much interesting - it craps out after the first
> 5 hops. Pinging (standard payload) from my office to the Nashua site is
> averaging less than 20 ms. One odd thing is that when I'm in the process
> of sending data to the Nashua site my pings jump up to 650 - 800 ms. 
>
> The Comcast tech was happy to conclude that the Nashua site was working
> properly. They checked transmission levels, noise and of course the guy
> downloaded some files and ran the Speakeasy speed tests and all of that
> looked good.
>
> Any ideas how to proceed on a problem like this? Currently I'm having
> the customer transmit their data to me and then I re-transmit because my
> connection although slow is probably 4 or 5 times faster than theirs.
>   
Sounds to me like the Bedford ISP/Carrier needs a clue bat.

--Bruce
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Re: How to troubleshoot wide area network performance problem?

2008-07-10 Thread Alex Hewitt
On Thu, 2008-07-10 at 19:36 -0400, Alex Hewitt wrote:
> I have clients with an interesting network problem. One location in
> Bedford New Hampshire using a fractionated T1 has routinely been
> transmitting studies to an office in Nashua New Hampshire. There have
> been no problems with this for at least 18 months. However recently
> (about a week ago), the transmissions suddenly became slow, really slow.
> A transmission that was taking around 10 minutes suddenly jumped to 2-3
> hours. The customer in Bedford New Hampshire is using One
> Communications. So far I haven't asked them to look at this problem
> because I've been trying to clarify it. The office in Nashua has
> Comcast business class service with a static IP address. 
> 
> Here's where it gets interesting. I had the Bedford client transmit the
> data to my system in Manchester New Hampshire. I have Comcast
> residential service. The data usually takes about 8 minutes to arrive at
> my location. I then send the data to the Nashua office and it typically
> takes 25-30 minutes. The payload is a collection of images that are
> typically between 65 and 70 MB. 
> 
> Today Comcast at the request of the customer sent someone on site to the
> Nashua site. The tech did some speed tests using the DSLReports
> Speakeasy test suite. He was getting  20 mbs down, 3+ mbs up which is
> pretty decent. For the fun of it I had him download a 47 MB antivirus
> program. His first try was ridiculous telling him it was going to take 4
> + hours. I had him break the connection and try again and this time the
> download took around a minute. 
> 
> And it gets more interesting...another client in Salem New Hampshire
> needed to send their data to the Nashua site (they use Verizon DSL). It
> arrived in about 8 minutes.
> 
> So my Comcast connection which is fairly decent is taking a half hour to
> send 65-70 MB to the Nashua site. The Salem site is taking 8 minutes for
> something approximately the same size and the Bedford site is taking
> several hours.
> 
> Traceroute doesn't show much interesting - it craps out after the first
> 5 hops. Pinging (standard payload) from my office to the Nashua site is
> averaging less than 20 ms. One odd thing is that when I'm in the process
> of sending data to the Nashua site my pings jump up to 650 - 800 ms. 
> 
> The Comcast tech was happy to conclude that the Nashua site was working
> properly. They checked transmission levels, noise and of course the guy
> downloaded some files and ran the Speakeasy speed tests and all of that
> looked good.
> 
> Any ideas how to proceed on a problem like this? Currently I'm having
> the customer transmit their data to me and then I re-transmit because my
> connection although slow is probably 4 or 5 times faster than theirs.
> 
> -Alex
> 
> 

A few more bits of information - I replaced the router in the Nashua
office (Netgear FVS 114) with a new identically configured model. The
download performance and speed tests were run with the Netgear router in
place (all good). I disconnected the router from the cable modem and
hooked the Mac that runs the client application directly to the cable
modem. Again all download tests look normal. I replaced the original Mac
with a newer model. The old system was a Mac Mini with 1 GB of Ram and a
G4 CPU. The replacement model was a dual core Intel based Mini with 2 GB
of Ram. The new system is definitely snappier but doesn't affect the
problem at all. 

-Alex

> 
> 
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How to troubleshoot wide area network performance problem?

2008-07-10 Thread Alex Hewitt
I have clients with an interesting network problem. One location in
Bedford New Hampshire using a fractionated T1 has routinely been
transmitting studies to an office in Nashua New Hampshire. There have
been no problems with this for at least 18 months. However recently
(about a week ago), the transmissions suddenly became slow, really slow.
A transmission that was taking around 10 minutes suddenly jumped to 2-3
hours. The customer in Bedford New Hampshire is using One
Communications. So far I haven't asked them to look at this problem
because I've been trying to clarify it. The office in Nashua has
Comcast business class service with a static IP address. 

Here's where it gets interesting. I had the Bedford client transmit the
data to my system in Manchester New Hampshire. I have Comcast
residential service. The data usually takes about 8 minutes to arrive at
my location. I then send the data to the Nashua office and it typically
takes 25-30 minutes. The payload is a collection of images that are
typically between 65 and 70 MB. 

Today Comcast at the request of the customer sent someone on site to the
Nashua site. The tech did some speed tests using the DSLReports
Speakeasy test suite. He was getting  20 mbs down, 3+ mbs up which is
pretty decent. For the fun of it I had him download a 47 MB antivirus
program. His first try was ridiculous telling him it was going to take 4
+ hours. I had him break the connection and try again and this time the
download took around a minute. 

And it gets more interesting...another client in Salem New Hampshire
needed to send their data to the Nashua site (they use Verizon DSL). It
arrived in about 8 minutes.

So my Comcast connection which is fairly decent is taking a half hour to
send 65-70 MB to the Nashua site. The Salem site is taking 8 minutes for
something approximately the same size and the Bedford site is taking
several hours.

Traceroute doesn't show much interesting - it craps out after the first
5 hops. Pinging (standard payload) from my office to the Nashua site is
averaging less than 20 ms. One odd thing is that when I'm in the process
of sending data to the Nashua site my pings jump up to 650 - 800 ms. 

The Comcast tech was happy to conclude that the Nashua site was working
properly. They checked transmission levels, noise and of course the guy
downloaded some files and ran the Speakeasy speed tests and all of that
looked good.

Any ideas how to proceed on a problem like this? Currently I'm having
the customer transmit their data to me and then I re-transmit because my
connection although slow is probably 4 or 5 times faster than theirs.

-Alex




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RE: Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread John Abreau

On Thu, July 10, 2008 4:08 pm, Alexander Wolfson said:
> This is our own board based on our own chip which among other things has
> ARM926EJ-S (ARMv5TEJ) core.
> There is no BSP yet, no Flash or USB drivers - only limited access to
> the board over JTAG. We can boot the board up to the point when kernel
> dies because there is no init. This why I need initramfs now.
>


While i don't know the details, I understand that it's common practice
when porting to a new platform to use bash, or perhaps a simpler shell,
in place of init, as a first step to achieve an initial boot.


-- 
John Abreau / Executive Director, Boston Linux & Unix
IM: [EMAIL PROTECTED] / [EMAIL PROTECTED] / [EMAIL PROTECTED] / [EMAIL 
PROTECTED]
Email [EMAIL PROTECTED] / WWW http://www.abreau.net / PGP-Key-ID 0xD5C7B5D9
PGP-Key-Fingerprint 72 FB 39 4F 3C 3B D6 5B E0 C8 5A 6E F1 2C BE 99


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This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

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RE: Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread Alexander Wolfson
Thank you,

I never heard of that one before

Alex

-Original Message-
From: Thomas Charron [mailto:[EMAIL PROTECTED] 
Sent: Thursday, July 10, 2008 5:44 PM
To: Alexander Wolfson
Cc: [EMAIL PROTECTED]; gnhlug-discuss@mail.gnhlug.org
Subject: Re: Example of ARM based linux board using initramfs and serial
console

On Thu, Jul 10, 2008 at 5:41 PM, Thomas Charron <[EMAIL PROTECTED]>
wrote:
>  The tool: Linux Target Image Builder http://www.bitshrine.org/

  I should elaborate.  the Linux Target Image Builder is actually not
done by Freescale, it's an open source utility whos website is located
at http://savannah.nongnu.org/projects/ltib

-- 
-- Thomas

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Re: Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread Thomas Charron
On Thu, Jul 10, 2008 at 5:41 PM, Thomas Charron <[EMAIL PROTECTED]> wrote:
>  The tool: Linux Target Image Builder http://www.bitshrine.org/

  I should elaborate.  the Linux Target Image Builder is actually not
done by Freescale, it's an open source utility whos website is located
at http://savannah.nongnu.org/projects/ltib

-- 
-- Thomas
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Re: Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread Thomas Charron
On Thu, Jul 10, 2008 at 5:13 PM, Alexander Wolfson
<[EMAIL PROTECTED]> wrote:
> Thanks,
> I looked at the docs - unfortunately they don't have details I am
> looking for - it is more a cook book. Source files + the davinci pdf
> would be great.
> I have seen a Gentoo's already. It uses a complicated build system so
> details a sort of hidden.

  If you're looking for a BSP to actually look at, Freescale has
several available, as well as a tool they utilize to allow customers
using freescale chips (including ARM) to build their distros.

  The BSPs:  
http://www.freescale.com/webapp/sps/site/overview.jsp?nodeId=02VS0l320822D0033202A7

  The tool: Linux Target Image Builder http://www.bitshrine.org/

-- 
-- Thomas
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RE: Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread Alexander Wolfson
Thanks,

I looked at the docs - unfortunately they don't have details I am
looking for - it is more a cook book. Source files + the davinci pdf
would be great.

I have seen a Gentoo's already. It uses a complicated build system so
details a sort of hidden.

Alex

-Original Message-
From: Thomas Charron [mailto:[EMAIL PROTECTED] 
Sent: Thursday, July 10, 2008 4:54 PM
To: Alexander Wolfson
Cc: [EMAIL PROTECTED]; gnhlug-discuss@mail.gnhlug.org
Subject: Re: Example of ARM based linux board using initramfs and serial
console

On Thu, Jul 10, 2008 at 4:41 PM, Alexander Wolfson
<[EMAIL PROTECTED]> wrote:
> Is it possible to take a look at the code for DaVinci?
> At least kernel configuration file and initramfs directory structure.
> Or you have to pay 7K for the license?
> I am afraid that I am missing some nuance, so I would like to have
some
> sanity check before starting a full blown debugging.

  Take a look at http://focus.ti.com/lit/an/spraah2a/spraah2a.pdf I
think it has basically the 'Idiots Guide' that they use as an example.

  Another thing to read that may help is
http://gentoo-wiki.com/HOWTO_Custom_Initramfs_From_Scratch

-- 
-- Thomas

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Quick DNS perfromance measurement trick

2008-07-10 Thread Jeff Kinz
Just saw this on a DNS forum, It seems to work nicely - 
I hope every one tries it and reports their result here in the gnhlug
list :-) 

found here : 
http://lists.oarci.net/pipermail/dns-operations/2008-July/002932.html

Here is the command: 

dig +short porttest.dns-oarc.net TXT


Here are my results: 
z.y.x.w.v.u.t.s.r.q.p.o.n.m.l.k.j.i.h.g.f.e.d.c.b.a.pt.dns-oarc.net.
"209.244.7.43 is POOR: 38 queries in 1.9 seconds from 2 ports with std dev 0.94"

It appears that "good" resolvers have lots of ports. 


Anyone who wants to take a whack at explaining what this means is very
welcome! 

That IP above is not known to me - here is my /etc/resolv.conf: 

; generated by /sbin/dhclient-script
search hsd1.ma.comcast.net.
nameserver 68.87.71.226
nameserver 68.87.73.242


Jeff Kinz ( ... OR his evil twin ) 

-- 

"When fascism comes to America it will be wrapped in a flag and carrying a 
cross."
- Sinclair Lewis.

Don't you hate it when a prognosticator is right? 
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Re: Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread Thomas Charron
On Thu, Jul 10, 2008 at 4:41 PM, Alexander Wolfson
<[EMAIL PROTECTED]> wrote:
> Is it possible to take a look at the code for DaVinci?
> At least kernel configuration file and initramfs directory structure.
> Or you have to pay 7K for the license?
> I am afraid that I am missing some nuance, so I would like to have some
> sanity check before starting a full blown debugging.

  Take a look at http://focus.ti.com/lit/an/spraah2a/spraah2a.pdf I
think it has basically the 'Idiots Guide' that they use as an example.

  Another thing to read that may help is
http://gentoo-wiki.com/HOWTO_Custom_Initramfs_From_Scratch

-- 
-- Thomas
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RE: Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread Alexander Wolfson
Is it possible to take a look at the code for DaVinci?

At least kernel configuration file and initramfs directory structure.

Or you have to pay 7K for the license?
I am afraid that I am missing some nuance, so I would like to have some
sanity check before starting a full blown debugging.


-Original Message-
From: Michael Nolin [mailto:[EMAIL PROTECTED] 
Sent: Thursday, July 10, 2008 4:32 PM
To: gnhlug-discuss@mail.gnhlug.org; Alexander Wolfson
Subject: Re: Example of ARM based linux board using initramfs and serial
console




> 
> I would like to find a working example of initramfs on the
> ARM based
> board.
> 
>

> 
> 
>  
> 
> I am porting Linux to the ARM 926 based board. There are no
> network or
> Flash drivers available yet. No LCD is available yet as
> well
> 
> I tried to use initramfs just to test the board , etc. 
> 
> This is a new chip so hardware bugs are possible.
> 

 The Texas Instruments Davinci platform uses a ARM926 core. U-Boot with
a Monta Vista Pro Linux kernel. I would start with U-Boot/arch/ARM to
get started on a new evaluation platform. This platform was not free
about 7K for the licenses, I thought this was a good value considering
rolling your own from uCLinux.org is work.  The hardware was only
$500.00

 I'm using an MMU less ARM966 with no OS, GNU Linux development
environment . ARM embedded question might best be answered on some of
the comp.arch.embedded.. GNUARM Yahoo groups?


Michael Nolin
Embedded Solutions Unlimited, LLC




  

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Re: Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread Michael Nolin



> 
> I would like to find a working example of initramfs on the
> ARM based
> board.
> 
> 
> 
> 
>  
> 
> I am porting Linux to the ARM 926 based board. There are no
> network or
> Flash drivers available yet. No LCD is available yet as
> well
> 
> I tried to use initramfs just to test the board , etc. 
> 
> This is a new chip so hardware bugs are possible.
> 

 The Texas Instruments Davinci platform uses a ARM926 core. U-Boot with a Monta 
Vista Pro Linux kernel. I would start with U-Boot/arch/ARM to get started on a 
new evaluation platform. This platform was not free about 7K for the licenses, 
I thought this was a good value considering rolling your own from uCLinux.org 
is work.  The hardware was only $500.00

 I'm using an MMU less ARM966 with no OS, GNU Linux development environment . 
ARM embedded question might best be answered on some of the 
comp.arch.embedded.. GNUARM Yahoo groups?


Michael Nolin
Embedded Solutions Unlimited, LLC




  
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RE: Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread Alexander Wolfson
This is our own board based on our own chip which among other things has
ARM926EJ-S (ARMv5TEJ) core.
There is no BSP yet, no Flash or USB drivers - only limited access to
the board over JTAG. We can boot the board up to the point when kernel
dies because there is no init. This why I need initramfs now.

Alex

-Original Message-
From: Thomas Charron [mailto:[EMAIL PROTECTED] 
Sent: Thursday, July 10, 2008 3:59 PM
To: Alexander Wolfson
Cc: gnhlug-discuss@mail.gnhlug.org
Subject: Re: Example of ARM based linux board using initramfs and serial
console

On Thu, Jul 10, 2008 at 2:59 PM, Alexander Wolfson
<[EMAIL PROTECTED]> wrote:
> Hi all,
> I would like to find a working example of initramfs on the ARM based
board.
> I am porting Linux to the ARM 926 based board. There are no network or
Flash
> drivers available yet. No LCD is available yet as well

  I'm confused.  You're trying to make a full Linux system on an
Arm-926 based board which doesn't already have a BSP which includes
Linux?  The kernel itself has run on the 926 for years.

-- 
-- Thomas

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Re: Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread Thomas Charron
On Thu, Jul 10, 2008 at 2:59 PM, Alexander Wolfson
<[EMAIL PROTECTED]> wrote:
> Hi all,
> I would like to find a working example of initramfs on the ARM based board.
> I am porting Linux to the ARM 926 based board. There are no network or Flash
> drivers available yet. No LCD is available yet as well

  I'm confused.  You're trying to make a full Linux system on an
Arm-926 based board which doesn't already have a BSP which includes
Linux?  The kernel itself has run on the 926 for years.

-- 
-- Thomas
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NoScript Error

2008-07-10 Thread TARogue
I have the NoScript extension installed on SeaMonkey. I just upgraded 
from 1.1.9 to 1.1.19 and had to reinstall all my addons. I am now 
getting errors even on blank pages.

[NoScript] nsBrowserAccess not found?!

What does this mean? How can I fix it? Any thoughts?

More info:
I open seamonkey and it's always set to open to a blank page. After 
upgrading and reinstalling NoScript and Adblocker Plus I close the 
browser and re-open it. Now I have a error panel open at the bottom of 
the screen. Checking for error messages I find 2:

Error: [Exception... "Component returned failure code: 0x8000 
(NS_ERROR_UNEXPECTED) [nsIPrefBranch.getCharPref]"  nsresult: 
"0x8000 (NS_ERROR_UNEXPECTED)"  location: "JS frame :: 
chrome://imagezoom/content/ZoomImageManager.js :: ZoomImageManager :: 
line 5"  data: no]
Source File: chrome://imagezoom/content/ZoomImageManager.js
Line: 5

and

Error: [Exception... "Component returned failure code: 0x8000 
(NS_ERROR_UNEXPECTED) [nsIPrefBranch.getCharPref]"  nsresult: 
"0x8000 (NS_ERROR_UNEXPECTED)"  location: "JS frame :: 
chrome://imagezoom/content/overlay.js :: initImageZoom :: line 45"  
data: no]
Source File: chrome://imagezoom/content/overlay.js
Line: 45

When I click on the Source File link from the first error I get the
first message of:
[NoScript] nsBrowserAccess not found?!

It also pops up a new Error message:
Error: [Exception... "Component returned failure code: 0x80004005 
(NS_ERROR_FAILURE) [nsIWebProgress.removeProgressListener]"  nsresult: 
"0x80004005 (NS_ERROR_FAILURE)"  location: "JS frame :: 
chrome://global/content/bindings/browser.xml :: removeProgressListener 
:: line 325"  data: no]
Source File: chrome://global/content/bindings/browser.xml
Line: 325

Clicking the Source File link from the second error give me the second 
message of:
[NoScript] nsBrowserAccess not found?!

And it pops up *another* error message:
Error: [Exception... "Component returned failure code: 0x80004005 
(NS_ERROR_FAILURE) [nsIWebProgress.removeProgressListener]"  nsresult: 
"0x80004005 (NS_ERROR_FAILURE)"  location: "JS frame :: 
chrome://global/content/bindings/browser.xml :: removeProgressListener 
:: line 325"  data: no]
Source File: chrome://global/content/bindings/browser.xml
Line: 325

I'm running seamonkey-1.1.10-1.fc8 on Fedora release 8 (Werewolf)

So, any thoughts?
   Tom

-- 
TARogue (Linux user number 234357)
 -Give a man a fish & he's fed for a day. Teach him to fish & he'll spend
 all day drinking beer getting sunburned.
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Example of ARM based linux board using initramfs and serial console

2008-07-10 Thread Alexander Wolfson
Hi all,

 

I just subscribed to the list and would like to say hello to everybody.

 

 

I would like to find a working example of initramfs on the ARM based
board.




 

I am porting Linux to the ARM 926 based board. There are no network or
Flash drivers available yet. No LCD is available yet as well

I tried to use initramfs just to test the board , etc. 

This is a new chip so hardware bugs are possible.

 

Unfortunately I never used intramfs before and was looking for a good
doc or better an example.

The closes I found beyond "/Documentation/filesystems/
ramfs-rootfs-initramfs.txt was on free-electrons.com .

They were using framebuffer and Qemu no serial console

 

I built initramfs file system using "buildroot" project.

 

So far board hangs after getting to the point where I assume it tries to
go to initramfs.

 

I started instrument the kernel, etc. to see what is going on, but it
would be nice to have a working example to know that at least I did not
make any stupid mistake.

 

 

Thanks,

 

Alex

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Re: Adding a new drive / fstab

2008-07-10 Thread Ben Scott
On Thu, Jul 10, 2008 at 11:33 AM, V. Alex Brennen <[EMAIL PROTECTED]> wrote:
> The reason that many people avoid putting anything under '/' that is not
> created by the operating system itself is that if you have any type of
> problem mounting the disk space that you plan to use under that
> directory, your programs or system can fill the '/' partition ...

  The same would be true of /mnt/, of course, unless that is its own
filesystem separate from the root.  And on many (most?) modern Linux
distros, the default is for one big partition for everything.  If one
sets permissions on the underlying mount point such that write access
is denied, you could solve that problem without resorting to a
separate partition just for mount points.  "chattr +i /mnt", for
example.

  Myself, I haven't worried about it much, but I haven't had to deal
much with different filesystem storages on the same host.  If one
filesystem isn't mounting, it will generally be noticed immediately,
because all sorts of things won't be working.  If I had big storage
appliances or lots of cross-mounts, like you described, my story would
likely be different.  "Experience is what you get by not having it
when you need it" and all that.  :)

  I *do* tend to create separate filesystems, but for other reasons.
I'm most concerned with a runaway process filling up the filesystem it
is *supposed* to be writing to.  For example, a malfunctioning process
generating tons of log messages can fill up the log partition.  (Which
can in turn cause all sorts of processes to hang/crash.)  So I isolate
them for that reason.  It also localizes filesystem fragmentation, and
allows for more selective use of the "noexec" option to "mount" as a
defense against malware.

  I use LVM rather than simple partitions to make resizing/reallocation easier.

  For example, on the GNHLUG server, there are LVs for / (root), swap,
/usr, /usr/local, /home, /sites, /tmp, /var/, /var/log, and
/var/spool.

> Linux has become somewhat resistant to these types of problems.

  I can say from recent experience that a full filesystem can impair a
modern Linux system pretty effectively.  :-/

  Some of the fancier filesystems don't use inodes; I expect they'd be
immune from inode exhaustion.  But they can still run out of space, of
course.

> Many default disk partitioning plans, including those of RedHat and many
> others, create a very small '/' partition.

  Red Hat (and derivatives) hasn't done things that way for years.
Their default scheme is to create a small /boot/ partition, and then
create one big / partition for everything else.  The reason for that
is *that* various bootloaders, motherboards, BIOSes, etc., have had
issues booting from large disks.  Ubuntu is the same way, as I recall.

-- Ben
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Re: Please trim quoted text (was: General Procedure)

2008-07-10 Thread David Berube

> Not to nitpick, but we will still have to trim quotes.
>
> Quote collapsing is great for the readers, but it won't help with message
> size limits on the server :-)
>   

I'm not suggesting that people don't trim their quotes, just that there 
are clientside approaches to ameliorating the visual, if not 
architectural, issues.

Take it easy,

David Berube
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Re: Adding a new drive / fstab

2008-07-10 Thread V. Alex Brennen
Many people said to just "use what works for you."  I agree.  There's no
deep need to conform to the POSIX HFS standard.  Especially, since many
of the points in the standard come from negotiation with the makers of
flavors of UNIX which are now long dead or dying.  If you look at the
LSB equivalent of the HFS standard, you can see it is much less verbose
and allows much more freedom for the administrator.

Regarding creating an additional mount point in the root directory,
which was also suggested, there are reasons why you may not want to do
that.

The reason that many people avoid putting anything under '/' that is not
created by the operating system itself is that if you have any type of
problem mounting the disk space that you plan to use under that
directory, your programs or system can fill the '/' partition (either
its available blocks or its available inodes).  On some systems, this
can cause booting and operational problems with your server bringing
some or all of your service down.  Linux has become somewhat resistant
to these types of problems.  It is much more so than the older *NIX
Operating Systems.  But, on Linux you would still encounter some
problems.  Depending on how your OS Disk(s) are partitioned, those
problems could be very serious.

This issue with filling up disk partitions for which parts of your core
operating system are depending on being able to write to has been
written about extensively.  The majority of the content on the web comes
from security sites and deals with including /var (and
especially /var/log) on a partition that can be filled by an individual
who has access to your system with only basic user permissions.  For
example, having /var on the same disk partition as /home and not having
quota restrictions in place.  Additional content can be found regarding
what will happen to applications if application/service critical
directories such as /tmp, /var/tmp, /var/spool/mail, /var/postgres,
etc., can easily be filled by even a non-malicious user.

Many default disk partitioning plans, including those of RedHat and many
others, create a very small '/' partition.  So, it can quickly be filled
before you even notice that you've had a problem.  Some distributions
will also not properly separate critical portions of the file system
onto independent partitions (such as /var and /home).  So, I'd recommend
that while you should do what ever works for you, it would also be good
to think about what could possibly go wrong.

I've run into problems myself before on Gentoo by not creating a
separate partition for /afs and then having an AFS boot sequence fail
because the local AFS service was having problems.  I then, stupidly,
had the same problem some time later on a RH system by not creating a
separate LV for /mnt and then having a SAN array mount failure during
boot.


  - VAB
-
V. Alex Brennen   [EMAIL PROTECTED]
Senior UNIX Systems Administrator
MIT Libraries   E25-131   x3-9327
   http://vab.mit.edu/


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Re: Please trim quoted text (was: General Procedure)

2008-07-10 Thread VirginSnow
> Date: Wed, 9 Jul 2008 22:11:29 -0400
> From: "Ben Scott" <[EMAIL PROTECTED]>

>   People: When sending replies -- especially one-line replies --
> please trim the hundreds or thousands of lines of quoted text which
> add nothing to the context of the message.  The server actually

Another thing which helps decrease "noise" in list messages is turning
off HTML mail.  I'm fairly confident an audience of Linux enthusiasts
can read text-only email.  When a message contains a text/html part,
it ends up being more than twice the size.  This is especially true if
the HTML includes lots of style definitions.
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Re: Please trim quoted text (was: General Procedure)

2008-07-10 Thread Ben Scott
On Thu, Jul 10, 2008 at 11:07 AM, David Berube
<[EMAIL PROTECTED]> wrote:
> FWIW, I'd also recommend the QuoteCollapse ThunderBird extension if
> you're on Thunderbird ...

  GMail has a similar feature.  But it's important to realize that the
hidden quotes are still there in the message; *your* mail program is
just hiding them from your view.

-- Ben
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Re: Please trim quoted text (was: General Procedure)

2008-07-10 Thread Tom Buskey
On Thu, Jul 10, 2008 at 11:07 AM, David Berube <
[EMAIL PROTECTED]> wrote:

> FWIW, I'd also recommend the QuoteCollapse ThunderBird extension if
> you're on Thunderbird -
> it collapses all qoutes to just the first line by default, and you can
> click a little plus icon to expand them if you need the full details.


Not to nitpick, but we will still have to trim quotes.

Quote collapsing is great for the readers, but it won't help with message
size limits on the server :-)
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SL5.2 (RHEL5.2) Print Notifier (cups?)

2008-07-10 Thread Labitt, Bruce
After upgrading to 5.2 my printing is broken.

Print Notifier is not allowing cancellation of jobs.  
CUPS shows my default printer (which worked last week) with the
following
"Unable to lookup up host '' - unknown host"
I cannot cancel the jobs in cups and see anything show up in print
notifier.  I have not been able to print since upgrading.

Is there a way to clear all pending jobs in print notifier?  These jobs
even survive a reboot.  This appeared to be a problem in FC3 - at least
my googling found that.

The last time I had issues with printing it was related to having to
append a corporate nameserver onto the end of some list.  I think I
ended up creating a file dhclient-enter-hooks with an export search.
Well that file is still there.  Any other place to look?


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Re: Adding a new drive / fstab

2008-07-10 Thread mike ledoux
On Wed, Jul 09, 2008 at 11:50:46AM -0400, Labitt, Bruce wrote:
> In the endless pursuit of upgrading this machine I have added a hard
> drive to my computer.  I have used fdisk to create a linux partition to
> the whole disk.  I made the disk use the ext3 file system.
> 
> So now for fstab.  What is the philosophy for creating an entry?  At
> this point I'm not sure what the mount point should be.  /home sounds

I generally mount additional "disks" for data storage as /data/n/.
Simple, clean, easy to understand & maintain.  These days, for production 
servers, my typical partitioning is:

 /boot
 /
 /tmp
 /var
 /opt (if I'm going to install much 3rd party software that will use it)
 /data

/home and /usr/local are symlinks into /data, as is /opt if I
haven't given it a separate partition.  If additional data "disks"
are needed, I either use LVM to add space to /data, or mount the
additional volumes as /data/1/, /data/2/, etc.

Ocassionally (usually for Oracle servers) I will create other
application-specific filesystems, but it is getting more and more
rare as app developers gain clue.

-- 
[EMAIL PROTECTED]  OpenPGP KeyID 0x57C3430B
Holder of Past Knowledge   CS, O-
"Would you rather me stick it in your chicken?"  Richard Jerrell

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Re: Please trim quoted text (was: General Procedure)

2008-07-10 Thread David Berube
FWIW, I'd also recommend the QuoteCollapse ThunderBird extension if 
you're on Thunderbird -
it collapses all qoutes to just the first line by default, and you can 
click a little plus icon to expand them if you need the full details.

Take it easy,

David Berube
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Re: Please trim quoted text (was: General Procedure)

2008-07-10 Thread Michael ODonnell


Thank you, Ben, for speaking up.  It sucks to have to
play cop/babysitter but things were getting totally
out of hand here and our normally good S/N ratio is
definitely worth defending.
 
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Re: Please trim quoted text (was: General Procedure)

2008-07-10 Thread Ric Werme

>  People: When sending replies -- especially one-line replies --
> please trim the hundreds or thousands of lines of quoted text which
> add nothing to the context of the message.  The server actually
> started rejecting messages in this thread because they had exceeded
> the 40 kilobyte message

The server was also sending out several digests with a single message.
I thought someone had changed the configuration until I looked at
one.

-Ric Werme
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RE: Please trim quoted text (was: General Procedure)

2008-07-10 Thread Labitt, Bruce
Sorry to the list.  I'll try to be more considerate.

 

Regards,

Bruce

 



From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of kenta
Sent: Thursday, July 10, 2008 8:33 AM
To: Greater NH Linux User Group
Subject: Re: Please trim quoted text (was: General Procedure)

 

I AGREE.  :D :D :D

 

/me ducks 

 

On 7/9/08, Ben Scott <[EMAIL PROTECTED]> wrote: 



On Wed, Jul 9, 2008 at 1:30 PM, Labitt, Bruce
<[EMAIL PROTECTED]> wrote:
> How does one change that?  Sorry to be such a noob.
[followed by tons of quoted text]

People: When sending replies -- especially one-line replies --
please trim the hundreds or thousands of lines of quoted text which
add nothing to the context of the message.  The server actually
started rejecting messages in this thread because they had exceeded
the 40 kilobyte message size limit.

Thanks.



-- Ben
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[GNHLUG] MerriLUG Nashua, Thur 17 Jul, Open Source Advocacy - Want to Help?

2008-07-10 Thread Jim Kuzdrall
Who  : Mark Boyajian, IT Consultant, Simple Solutions 
What : Open Source Advocacy - Want to Help? 
Where: Martha's Exchange
Day  : Thur 17 Jul **Next Week**
Time : 6:00 PM for grub, 7:30 PM for discussion (usually upstairs)

:: Overview

 Open Source software can be an easy path to Linux.  If the Windows 
user is leary about changing operating systems and software at the same 
time, high quality Open Source software can make it a much less 
daunting two step process.

 Mark Boyajian has a campaign to publicize the Open Source option 
and inform people about the many fine programs available.  His approach 
is particularly innovative: use the local public library as a base.

 Mark will explain the very successful Tech Talk series he pioneered 
at the Lawrence Library in Pepperell along with other strategies.

 Want to ease your neighbor, cousin, or boss into Linux?   Use the 
two step Open Source route.  Take them to Perrerell or, better yet, get 
your local public library involved!  Mark will get you started.

 >>> RSVP to Jim Kuzdrall for dinner to assure adequate seating. <<<
 !!! If you are not a "Regular Attendee" (50%), please let me know. !!!

Driving directions:
http://wiki.gnhlug.org/twiki2/bin/view/Www/PlaceMarthasExchange

Thanks,

Jim Kuzdrall
[EMAIL PROTECTED]
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Re: Please trim quoted text (was: General Procedure)

2008-07-10 Thread kenta
I AGREE.  :D :D :D

/me ducks


On 7/9/08, Ben Scott <[EMAIL PROTECTED]> wrote:
>
> 
>
> On Wed, Jul 9, 2008 at 1:30 PM, Labitt, Bruce
> <[EMAIL PROTECTED]> wrote:
> > How does one change that?  Sorry to be such a noob.
> [followed by tons of quoted text]
>
> People: When sending replies -- especially one-line replies --
> please trim the hundreds or thousands of lines of quoted text which
> add nothing to the context of the message.  The server actually
> started rejecting messages in this thread because they had exceeded
> the 40 kilobyte message size limit.
>
> Thanks.
>
> 
>
> -- Ben
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>
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