[gentoo-user] OT - Why is Gentoo so slow when internet is out?

[gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Michael Sullivan]

Our cable internet service goes out frequently (and probably even more
frequently now that winter has come to OKlahoma.)  When it goes out,
pretty much everything on my Gentoo system slows down.  It's gotten to
where just to get an application (like gnumeric) to open I have to su -
to root and shut down /etc/init.d/net.eth0 until the Internet comes back
on.  This morning the internet was out and I'd shut down net.eth0 and
then tried to run monodevelop and it refused to start giving me some
message about my PC's hostname not being set correctly in /etc/hosts.  I
checked it and /etc/hosts was correct.  Must just be a glitch with
monodevelop.  My question is what is it about Gentoo that relies so
heavily on connecting to the internet?  My network was running just fine
- just the connection between the cable modem and the internet was down,
but everything inside my router should have been fine...

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Ciaran McCreesh]

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On Mon, 28 Nov 2005 14:54:29 -0600 Michael Sullivan
<michael@espersunited.com> wrote:
| Our cable internet service goes out frequently (and probably even more
| frequently now that winter has come to OKlahoma.)  When it goes out,
| pretty much everything on my Gentoo system slows down.  It's gotten to
| where just to get an application (like gnumeric) to open I have to su
| - to root and shut down /etc/init.d/net.eth0 until the Internet comes
| back on.  This morning the internet was out and I'd shut down
| net.eth0 and then tried to run monodevelop and it refused to start
| giving me some message about my PC's hostname not being set correctly
| in /etc/hosts.  I checked it and /etc/hosts was correct.  Must just
| be a glitch with monodevelop.  My question is what is it about Gentoo
| that relies so heavily on connecting to the internet?  My network was
| running just fine
| - just the connection between the cable modem and the internet was
| down, but everything inside my router should have been fine...

Hrm. It's nothing in the base system. I sometimes run my laptop without
network, and I don't have issues. Chances are some app you're running
is trying to do lots of DNS queries... Does 'top' tell you anything
useful?

-- 
Ciaran McCreesh : Gentoo Developer (The one that looks before leaping)
Mail            : ciaranm at gentoo.org
Web             : http://dev.gentoo.org/~ciaranm


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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Danyelle Gragsone]

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to me.. linux in general has always ran slow if the net connection goes
out.  It might be constantly trying to access the internet.  Kinda like the
a cell phones battery dies alot faster when it cant connect to a tower.  It
just keeps trying til it gets something or the phone dies.

On 11/28/05, Michael Sullivan <michael@espersunited.com> wrote:
>
> Our cable internet service goes out frequently (and probably even more
> frequently now that winter has come to OKlahoma.)  When it goes out,
> pretty much everything on my Gentoo system slows down.  It's gotten to
> where just to get an application (like gnumeric) to open I have to su -
> to root and shut down /etc/init.d/net.eth0 until the Internet comes back
> on.  This morning the internet was out and I'd shut down net.eth0 and
> then tried to run monodevelop and it refused to start giving me some
> message about my PC's hostname not being set correctly in /etc/hosts.  I
> checked it and /etc/hosts was correct.  Must just be a glitch with
> monodevelop.  My question is what is it about Gentoo that relies so
> heavily on connecting to the internet?  My network was running just fine
> - just the connection between the cable modem and the internet was down,
> but everything inside my router should have been fine...
>
> --
> gentoo-user@gentoo.org mailing list
>
>

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[andy]

On Mon, 28 Nov 2005 16:06:44 -0500
Danyelle Gragsone <ladynikon@gmail.com> wrote:

i think there are running files that you dont need without a net-device, try to find these processes/services with 
"ps -aux" and "rc-update -s" and stop/kill them

greets

> to me.. linux in general has always ran slow if the net connection goes
> out.  It might be constantly trying to access the internet.  Kinda like the
> a cell phones battery dies alot faster when it cant connect to a tower.  It
> just keeps trying til it gets something or the phone dies.
> 
> On 11/28/05, Michael Sullivan <michael@espersunited.com> wrote:
> >
> > Our cable internet service goes out frequently (and probably even more
> > frequently now that winter has come to OKlahoma.)  When it goes out,
> > pretty much everything on my Gentoo system slows down.  It's gotten to
> > where just to get an application (like gnumeric) to open I have to su -
> > to root and shut down /etc/init.d/net.eth0 until the Internet comes back
> > on.  This morning the internet was out and I'd shut down net.eth0 and
> > then tried to run monodevelop and it refused to start giving me some
> > message about my PC's hostname not being set correctly in /etc/hosts.  I
> > checked it and /etc/hosts was correct.  Must just be a glitch with
> > monodevelop.  My question is what is it about Gentoo that relies so
> > heavily on connecting to the internet?  My network was running just fine
> > - just the connection between the cable modem and the internet was down,
> > but everything inside my router should have been fine...
> >
> > --
> > gentoo-user@gentoo.org mailing list
> >
> >
-- 
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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Dale]

Danyelle Gragsone wrote:

> to me.. linux in general has always ran slow if the net connection
> goes out.  It might be constantly trying to access the internet. 
> Kinda like the a cell phones battery dies alot faster when it cant
> connect to a tower.  It just keeps trying til it gets something or the
> phone dies.

That's funny.  I'm on dial-up and I see no difference at all.  I even
run ntp which sets my clock and keeps it on track for me and there is no
difference when I am connected and when I am not.

Yes, I have three network cards installed and running all the time.  I
do have a local LAN here with three other rigs connected.

This is not making sense.  If what you guys are saying is correct,
people on dial-up can't use Linux.  That's not right.

Dale
:-)

-- 
To err is human, I'm most certainly human.

 

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[Ognjen Bezanov]

Dale wrote:

>Danyelle Gragsone wrote:
>
>  
>
>>to me.. linux in general has always ran slow if the net connection
>>goes out.  It might be constantly trying to access the internet. 
>>Kinda like the a cell phones battery dies alot faster when it cant
>>connect to a tower.  It just keeps trying til it gets something or the
>>phone dies.
>>    
>>
>
>That's funny.  I'm on dial-up and I see no difference at all.  I even
>run ntp which sets my clock and keeps it on track for me and there is no
>difference when I am connected and when I am not.
>
>Yes, I have three network cards installed and running all the time.  I
>do have a local LAN here with three other rigs connected.
>
>This is not making sense.  If what you guys are saying is correct,
>people on dial-up can't use Linux.  That's not right.
>
>Dale
>:-)
>
>  
>
I have a gentoo system (Actually I have four of them) and they dont 
experience a slowdown when my internet connection goes down (which it 
invariably does because my ISP reboots its servers every 28 days as a 
policy, thereby disconnecting me ). Chances are its a particular program 
thats trying to connect to the net and failing, thereby using cycles in 
new attempts.

While we are at it, does there exist a program that can monitor my 
internet connection and run a script if the net is down (like a restart 
script)? I dont want to have to come home and ssh in to restart 
everytime my ISP reboots its M$ Servers.

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[Nick Rout]

On Mon, 28 Nov 2005 22:43:01 +0000
Ognjen Bezanov wrote:

> 
> I have a gentoo system (Actually I have four of them) and they dont 
> experience a slowdown when my internet connection goes down (which it 
> invariably does because my ISP reboots its servers every 28 days as a 
> policy, thereby disconnecting me ). Chances are its a particular program 
> thats trying to connect to the net and failing, thereby using cycles in 
> new attempts.
> 
> While we are at it, does there exist a program that can monitor my 
> internet connection and run a script if the net is down (like a restart 
> script)? I dont want to have to come home and ssh in to restart 
> everytime my ISP reboots its M$ Servers.

many programs do a dns lookup on connection, to see who is trying to
connect. It should be managed on your lan with /etc/hosts if you have it
sorted properly.

can you ping via name to other machines on your lan?

> 
> -- 
> gentoo-user@gentoo.org mailing list

-- 
Nick Rout <nick@rout.co.nz>

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[Michael Sullivan]

On Tue, 2005-11-29 at 12:24 +1300, Nick Rout wrote:
> On Mon, 28 Nov 2005 22:43:01 +0000
> Ognjen Bezanov wrote:
> 
> > 
> > I have a gentoo system (Actually I have four of them) and they dont 
> > experience a slowdown when my internet connection goes down (which it 
> > invariably does because my ISP reboots its servers every 28 days as a 
> > policy, thereby disconnecting me ). Chances are its a particular program 
> > thats trying to connect to the net and failing, thereby using cycles in 
> > new attempts.
> > 
> > While we are at it, does there exist a program that can monitor my 
> > internet connection and run a script if the net is down (like a restart 
> > script)? I dont want to have to come home and ssh in to restart 
> > everytime my ISP reboots its M$ Servers.
> 
> many programs do a dns lookup on connection, to see who is trying to
> connect. It should be managed on your lan with /etc/hosts if you have it
> sorted properly.
> 
> can you ping via name to other machines on your lan?

Yes I can.

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[John Jolet]

On Monday 28 November 2005 17:58, Michael Sullivan wrote:
> On Tue, 2005-11-29 at 12:24 +1300, Nick Rout wrote:
> > On Mon, 28 Nov 2005 22:43:01 +0000
> >
> > Ognjen Bezanov wrote:
> > > I have a gentoo system (Actually I have four of them) and they dont
> > > experience a slowdown when my internet connection goes down (which it
> > > invariably does because my ISP reboots its servers every 28 days as a
> > > policy, thereby disconnecting me ). Chances are its a particular
> > > program thats trying to connect to the net and failing, thereby using
> > > cycles in new attempts.
> > >
> > > While we are at it, does there exist a program that can monitor my
> > > internet connection and run a script if the net is down (like a restart
> > > script)? I dont want to have to come home and ssh in to restart
> > > everytime my ISP reboots its M$ Servers.
>
ifplugd works, at least at the ethernet level.
 >
> > many programs do a dns lookup on connection, to see who is trying to
> > connect. It should be managed on your lan with /etc/hosts if you have it
> > sorted properly.
> >
> > can you ping via name to other machines on your lan?
>
> Yes I can.

-- 
John Jolet
Your On-Demand IT Department
512-762-0729
www.jolet.net
john@jolet.net
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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[Billy Holmes]

Michael Sullivan wrote:

>>can you ping via name to other machines on your lan?
> Yes I can.

maybe put some of your local machines into your /etc/hosts file, so it 
won't attempt to do dns lookups on them.

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[Michael Sullivan]

On Tue, 2005-11-29 at 13:58 -0500, Billy Holmes wrote:
> Michael Sullivan wrote:
> 
> >>can you ping via name to other machines on your lan?
> > Yes I can.
> 
> maybe put some of your local machines into your /etc/hosts file, so it 
> won't attempt to do dns lookups on them.

Every computer in my network is listed in /etc/hosts, and the /etc/hosts
file is then copied to every computer in the network.

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[Shawn Singh]

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I've experienced a few outages (mainly due to inclement weather), but not
seen my Gentoo system slow down at all; however, I have seen my Fedora Core
4 and Mandrake 9.2 boxes slow down when their connection to the Internet is
lost, but that is normally due to some service / app that relies on Internet
connectivity.

I'd check to see what services  and applications are running and determine
which of them may be causing the problem.

On 11/28/05, Nick Rout <nick@rout.co.nz> wrote:
>
>
> On Mon, 28 Nov 2005 22:43:01 +0000
> Ognjen Bezanov wrote:
>
> >
> > I have a gentoo system (Actually I have four of them) and they dont
> > experience a slowdown when my internet connection goes down (which it
> > invariably does because my ISP reboots its servers every 28 days as a
> > policy, thereby disconnecting me ). Chances are its a particular program
> > thats trying to connect to the net and failing, thereby using cycles in
> > new attempts.
> >
> > While we are at it, does there exist a program that can monitor my
> > internet connection and run a script if the net is down (like a restart
> > script)? I dont want to have to come home and ssh in to restart
> > everytime my ISP reboots its M$ Servers.
>
> many programs do a dns lookup on connection, to see who is trying to
> connect. It should be managed on your lan with /etc/hosts if you have it
> sorted properly.
>
> can you ping via name to other machines on your lan?
>
> >
> > --
> > gentoo-user@gentoo.org mailing list
>
> --
> Nick Rout <nick@rout.co.nz>
>
> --
> gentoo-user@gentoo.org mailing list
>
>


--
Shawn Singh

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[Dale]

Ognjen Bezanov wrote:

>  I dont want to have to come home and ssh in to restart everytime my
> ISP reboots its M$ Servers.

It's funny that you say that.  One of the first things I asked my ISP
when I was looking for one, what OS do you use?  If they didn't use
*nix, I was going to keep looking.  It is very rare that I have any
trouble either.

Another thing I like about mine is the service.  When I call them, I get
a live human being that answers the phone.  They don't have a automated
thingy, just people.  I have talked to the owner once and have actually
had the guys that run the network to call me for help.  I am the only
one that runs Linux with the logs turned on and it gives them a lot of
info if they are having any connection problems.  I guess windoze
doesn't.  They call me and get me to connect and see what happens.  If I
can't connect, I call them back and read them the log files and the boo
boo message.  They had the login/password file get borked once.  They
said it was there but it was messed up.  They took the one from their
back-ups and up it went.  We were surfing again.  :)

Ever consider switching ISPs or are you stuck with the one you have? 
I'll switch for DSL but that is about it.  Dial-up sucks, 26K is all I
get here.

Dale
:) :)

-- 
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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[Michael Sullivan]

On Mon, 2005-11-28 at 18:11 -0600, Dale wrote:
> Ognjen Bezanov wrote:
> 
> >  I dont want to have to come home and ssh in to restart everytime my
> > ISP reboots its M$ Servers.
> 
> It's funny that you say that.  One of the first things I asked my ISP
> when I was looking for one, what OS do you use?  If they didn't use
> *nix, I was going to keep looking.  It is very rare that I have any
> trouble either.
> 
> Another thing I like about mine is the service.  When I call them, I get
> a live human being that answers the phone.  They don't have a automated
> thingy, just people.  I have talked to the owner once and have actually
> had the guys that run the network to call me for help.  I am the only
> one that runs Linux with the logs turned on and it gives them a lot of
> info if they are having any connection problems.  I guess windoze
> doesn't.  They call me and get me to connect and see what happens.  If I
> can't connect, I call them back and read them the log files and the boo
> boo message.  They had the login/password file get borked once.  They
> said it was there but it was messed up.  They took the one from their
> back-ups and up it went.  We were surfing again.  :)
> 
> Ever consider switching ISPs or are you stuck with the one you have? 
> I'll switch for DSL but that is about it.  Dial-up sucks, 26K is all I
> get here.
> 
> Dale
> :) :)
> 
> -- 
> To err is human, I'm most certainly human.

My wife says that we can try SBC DSL after the new year starts (when we
can afford it.)  I just hope that I can get everything converted over to
PPP....

 


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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[Dale]

Michael Sullivan wrote:

>On Mon, 2005-11-28 at 18:11 -0600, Dale wrote:
>  
>
>
>My wife says that we can try SBC DSL after the new year starts (when we
>can afford it.)  I just hope that I can get everything converted over to
>PPP....
>  
>
I !think! they use windoze too.  Aren't they the same as Bell South?  I know Bell South uses windoze because it is a nightmare paying my bill online.  Since I am on a slow dial-up their servers keep timing out on me.  I notice windoze does this a lot more *nix servers do.

Later

Dale
:-)

-- 
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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out? + question

[Ben Edwards]

On 28/11/05, Ognjen Bezanov <ognjen@mailshack.com> wrote:
....
> >>to me.. linux in general has always ran slow if the net connection
> >>goes out.  It might be constantly trying to access the internet.
> >>Kinda like the a cell phones battery dies alot faster when it cant
> >>connect to a tower.  It just keeps trying til it gets something or the
> >>phone dies.
> >>

I had a problem of slowness a while ago and it was because my loopback
interface was missing.  Something to check.

Ben
--
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WARNING:This email contained partisan views - don't ever accuse me of
using the veneer of objectivity
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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Alexander Kirillov]

> Our cable internet service goes out frequently (and probably even more
> frequently now that winter has come to OKlahoma.)  When it goes out,
> pretty much everything on my Gentoo system slows down.  It's gotten to
> where just to get an application (like gnumeric) to open I have to su -
> to root and shut down /etc/init.d/net.eth0 until the Internet comes back
> on.  This morning the internet was out and I'd shut down net.eth0 and
> then tried to run monodevelop and it refused to start giving me some
> message about my PC's hostname not being set correctly in /etc/hosts.  I
> checked it and /etc/hosts was correct.  Must just be a glitch with
> monodevelop.  My question is what is it about Gentoo that relies so
> heavily on connecting to the internet?  My network was running just fine
> - just the connection between the cable modem and the internet was down,
> but everything inside my router should have been fine...

Do you have nscd running? Try to stop or restart it. It can be a real 
nuisance when internet connection goes down.
It's also a good idea to run dns server locally
if only to troubleshoot name resolution problems.
HTH,
Sasha

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Michael Sullivan]

On Tue, 2005-11-29 at 00:21 +0300, Alexander Kirillov wrote:
> > Our cable internet service goes out frequently (and probably even more
> > frequently now that winter has come to OKlahoma.)  When it goes out,
> > pretty much everything on my Gentoo system slows down.  It's gotten to
> > where just to get an application (like gnumeric) to open I have to su -
> > to root and shut down /etc/init.d/net.eth0 until the Internet comes back
> > on.  This morning the internet was out and I'd shut down net.eth0 and
> > then tried to run monodevelop and it refused to start giving me some
> > message about my PC's hostname not being set correctly in /etc/hosts.  I
> > checked it and /etc/hosts was correct.  Must just be a glitch with
> > monodevelop.  My question is what is it about Gentoo that relies so
> > heavily on connecting to the internet?  My network was running just fine
> > - just the connection between the cable modem and the internet was down,
> > but everything inside my router should have been fine...
> 
> Do you have nscd running? Try to stop or restart it. It can be a real 
> nuisance when internet connection goes down.
> It's also a good idea to run dns server locally
> if only to troubleshoot name resolution problems.
> HTH,
> Sasha
> 

I don't have a full DNS server for my domain.  Each computer on my
network has a copy of the same /etc/hosts file.  Is there some way I can
make it use that for DNS lookups locally?

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Arturo 'Buanzo' Busleiman]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Michael Sullivan wrote:
> I don't have a full DNS server for my domain.  Each computer on my
> network has a copy of the same /etc/hosts file.  Is there some way I can
> make it use that for DNS lookups locally?

Edit /etc/host.conf - it's well commented.

dnsmasq reads and provides dns resolution based on /etc/hosts, too. additionlly, check  your
/etc/resolv.conf. a "nameserver 127.0.0.1" line should be present, if you want to avoid contacting
the internet for dns lookups, if so your system configured.

- --
Arturo "Buanzo" Busleiman - www.buanzo.com.ar
Consultor en Seguridad Informatica / Dominio Digital TV - Da FOSS man!
KTP Consultores - info AT ktpconsultores.com.ar

Romper un sistema de seguridad los acerca tanto a ser hackers como el
encender autos puenteando los convierte en ingenieros automotrices.
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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Michael Sullivan]

On Mon, 2005-11-28 at 18:40 -0300, Arturo 'Buanzo' Busleiman wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Michael Sullivan wrote:
> > I don't have a full DNS server for my domain.  Each computer on my
> > network has a copy of the same /etc/hosts file.  Is there some way I can
> > make it use that for DNS lookups locally?
> 
> Edit /etc/host.conf - it's well commented.
> 
> dnsmasq reads and provides dns resolution based on /etc/hosts, too. additionlly, check  your
> /etc/resolv.conf. a "nameserver 127.0.0.1" line should be present, if you want to avoid contacting
> the internet for dns lookups, if so your system configured.
> 
> - --
> Arturo "Buanzo" Busleiman - www.buanzo.com.ar
> Consultor en Seguridad Informatica / Dominio Digital TV - Da FOSS man!
> KTP Consultores - info AT ktpconsultores.com.ar
> 
> Romper un sistema de seguridad los acerca tanto a ser hackers como el
> encender autos puenteando los convierte en ingenieros automotrices.

The loopback address wasn't in my /etc/resolv.conf, so I added it and
restarted net.eth0....

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Alexander Kirillov]

>>>Our cable internet service goes out frequently (and probably even more
>>>frequently now that winter has come to OKlahoma.)  When it goes out,
>>>pretty much everything on my Gentoo system slows down.  It's gotten to
>>>where just to get an application (like gnumeric) to open I have to su -
>>>to root and shut down /etc/init.d/net.eth0 until the Internet comes back
>>>on.  This morning the internet was out and I'd shut down net.eth0 and
>>>then tried to run monodevelop and it refused to start giving me some
>>>message about my PC's hostname not being set correctly in /etc/hosts.  I
>>>checked it and /etc/hosts was correct.  Must just be a glitch with
>>>monodevelop.  My question is what is it about Gentoo that relies so
>>>heavily on connecting to the internet?  My network was running just fine
>>>- just the connection between the cable modem and the internet was down,
>>>but everything inside my router should have been fine...
>>
>>Do you have nscd running? Try to stop or restart it. It can be a real 
>>nuisance when internet connection goes down.
>>It's also a good idea to run dns server locally
>>if only to troubleshoot name resolution problems.
>
> I don't have a full DNS server for my domain.  Each computer on my
> network has a copy of the same /etc/hosts file.  Is there some way I can
> make it use that for DNS lookups locally?

The local resolver lib will use either /etc/hosts file or dns queries in 
the order defined in your /etc/host.conf
Anyway I think it makes sense to go through the chores of setting up
local dns server ones to save some time later down the road.

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Richard Fish]

On 11/28/05, Alexander Kirillov <nevis2us@infoline.su> wrote:
> The local resolver lib will use either /etc/hosts file or dns queries in
> the order defined in your /etc/host.conf

You mean /etc/nsswitch.conf?

-Richard

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Alexander Kirillov]

>>The local resolver lib will use either /etc/hosts file or dns queries in
>>the order defined in your /etc/host.conf
> 
> You mean /etc/nsswitch.conf?

I probably do. Is /etc/host.conf still of any use?

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Richard Fish]

On 11/28/05, Alexander Kirillov <nevis2us@infoline.su> wrote:
> >>The local resolver lib will use either /etc/hosts file or dns queries in
> >>the order defined in your /etc/host.conf
> >
> > You mean /etc/nsswitch.conf?
>
> I probably do. Is /etc/host.conf still of any use?

Actually, I'm not sure.  I've always edited nsswitch.conf to get it to
do what I want, with good results.

I see with strace that when I ping <somehost>, both nsswitch.conf and
host.conf are opened.  The man pages don't reveal anything about their
relationship, so I guess I'll have to take a look at the glibc sources
tonight.

-Richard

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Richard Fish]

On 11/28/05, Richard Fish <bigfish@asmallpond.org> wrote:
> On 11/28/05, Alexander Kirillov <nevis2us@infoline.su> wrote:
> > >>The local resolver lib will use either /etc/hosts file or dns queries in
> > >>the order defined in your /etc/host.conf
> > >
> > > You mean /etc/nsswitch.conf?
> >
> > I probably do. Is /etc/host.conf still of any use?
>
> Actually, I'm not sure.  I've always edited nsswitch.conf to get it to
> do what I want, with good results.
>
> I see with strace that when I ping <somehost>, both nsswitch.conf and
> host.conf are opened.  The man pages don't reveal anything about their
> relationship, so I guess I'll have to take a look at the glibc sources
> tonight.

As close as I can tell from reading the code (which is to say, I am
making an only slightly educated guess), the 'order' keyword in
host.conf is pretty much ignored by current glibc versions.  Host.conf
is only consulted by the libnss_files.so module, and then only for the
'multi' option.  The order in nsswitch.conf is authoritative.

This seems to be confirmed by a few "strace ping" attempts with
various configurations.

-Richard

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Alexander Kirillov]

>>>>>The local resolver lib will use either /etc/hosts file or dns queries in
>>>>>the order defined in your /etc/host.conf
>>>>
>>>>You mean /etc/nsswitch.conf?
>>>
>>>I probably do. Is /etc/host.conf still of any use?
>>
>>Actually, I'm not sure.  I've always edited nsswitch.conf to get it to
>>do what I want, with good results.
>>
>>I see with strace that when I ping <somehost>, both nsswitch.conf and
>>host.conf are opened.  The man pages don't reveal anything about their
>>relationship, so I guess I'll have to take a look at the glibc sources
>>tonight.
> 
> As close as I can tell from reading the code (which is to say, I am
> making an only slightly educated guess), the 'order' keyword in
> host.conf is pretty much ignored by current glibc versions.  Host.conf
> is only consulted by the libnss_files.so module, and then only for the
> 'multi' option.  The order in nsswitch.conf is authoritative.
> 
> This seems to be confirmed by a few "strace ping" attempts with
> various configurations.

Thanks Rich,
I also was curious and spent some time googling
and reading man pages (without success) but didn't go that far:)
Sasha

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Alexander Kirillov]

>>>Our cable internet service goes out frequently (and probably even more
>>>frequently now that winter has come to OKlahoma.)  When it goes out,
>>>pretty much everything on my Gentoo system slows down.  It's gotten to
>>>where just to get an application (like gnumeric) to open I have to su -
>>>to root and shut down /etc/init.d/net.eth0 until the Internet comes back
>>>on.  This morning the internet was out and I'd shut down net.eth0 and
>>>then tried to run monodevelop and it refused to start giving me some
>>>message about my PC's hostname not being set correctly in /etc/hosts.  I
>>>checked it and /etc/hosts was correct.  Must just be a glitch with
>>>monodevelop.  My question is what is it about Gentoo that relies so
>>>heavily on connecting to the internet?  My network was running just fine
>>>- just the connection between the cable modem and the internet was down,
>>>but everything inside my router should have been fine...
>>
>>Do you have nscd running? Try to stop or restart it. It can be a real 
>>nuisance when internet connection goes down.
>>It's also a good idea to run dns server locally
>>if only to troubleshoot name resolution problems.
>>HTH,
>>Sasha
> 
> 
> I don't have a full DNS server for my domain.  Each computer on my
> network has a copy of the same /etc/hosts file.  Is there some way I can
> make it use that for DNS lookups locally?
> 

http://gentoo-wiki.com/HOWTO_setup_a_home-server
may be of use though I've never tried dnsmasq myself.

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Timur Aydin]

Michael Sullivan <michael@espersunited.com> writes:

> I don't have a full DNS server for my domain.  Each computer on my
> network has a copy of the same /etc/hosts file.  Is there some way I can
> make it use that for DNS lookups locally?

Having the exact same copy on each system does not sound
correct. There should be a "localhost" alias in each /etc/hosts and it
should point to the IP address of the relevant machine.

-- 
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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Michael Sullivan]

On Tue, 2005-11-29 at 22:07 +0200, Timur Aydin wrote:
> Michael Sullivan <michael@espersunited.com> writes:
> 
> > I don't have a full DNS server for my domain.  Each computer on my
> > network has a copy of the same /etc/hosts file.  Is there some way I can
> > make it use that for DNS lookups locally?
> 
> Having the exact same copy on each system does not sound
> correct. There should be a "localhost" alias in each /etc/hosts and it
> should point to the IP address of the relevant machine.
> 
> -- 
> Timur Aydin

Yeah.  Each one has an entry that says 

127.0.0.1	localhost.localdomain	localhost

and then it has an entry consisting of 

192.168.1.?	name.espersunited.com	name

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Josh Helmer]

On Tuesday 29 November 2005 08:17 pm, Michael Sullivan wrote:
> Yeah.  Each one has an entry that says
>
> 127.0.0.1	localhost.localdomain	localhost
>
> and then it has an entry consisting of
>
> 192.168.1.?	name.espersunited.com	name


Looks correct to me.

Someone may have already suggested this (if so, sorry), but how about 
your /etc/nsswitch.conf file?  Are you  checking the hosts file before you 
try a dns lookup?

Josh
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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Michael Sullivan]

On Tue, 2005-11-29 at 13:25 +0000, Josh Helmer wrote:
> On Tuesday 29 November 2005 08:17 pm, Michael Sullivan wrote:
> > Yeah.  Each one has an entry that says
> >
> > 127.0.0.1	localhost.localdomain	localhost
> >
> > and then it has an entry consisting of
> >
> > 192.168.1.?	name.espersunited.com	name
> 
> 
> Looks correct to me.
> 
> Someone may have already suggested this (if so, sorry), but how about 
> your /etc/nsswitch.conf file?  Are you  checking the hosts file before you 
> try a dns lookup?
> 
> Josh

michael@camille ~ $ cat /etc/nsswitch.conf
# /etc/nsswitch.conf:
# $Header: /var/cvsroot/gentoo-x86/sys-libs/glibc/files/nsswitch.conf,v
1.1 2005/05/17 00:52:41 vapier Exp $

passwd:      compat
shadow:      compat
group:       compat

# passwd:    db files nis
# shadow:    db files nis
# group:     db files nis

hosts:       files dns
networks:    files dns

services:    db files
protocols:   db files
rpc:         db files
ethers:      db files
netmasks:    files
netgroup:    files
bootparams:  files

automount:   files
aliases:     files


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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Manuel McLure]

Timur Aydin wrote:
> Having the exact same copy on each system does not sound
> correct. There should be a "localhost" alias in each /etc/hosts and it
> should point to the IP address of the relevant machine.

No. Nononono. "localhost" should always point to 127.0.0.1.

-- 
Manuel A. McLure KE6TAW <manuel@mclure.org> <http://www.mclure.org>
...for in Ulthar, according to an ancient and significant law,
no man may kill a cat.                       -- H.P. Lovecraft
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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Rob]

Michael Sullivan wrote:
> Our cable internet service goes out frequently (and probably even more
> frequently now that winter has come to OKlahoma.)  When it goes out,
> pretty much everything on my Gentoo system slows down.  It's gotten to
> where just to get an application (like gnumeric) to open I have to su -
> to root and shut down /etc/init.d/net.eth0 until the Internet comes back
> on.  This morning the internet was out and I'd shut down net.eth0 and
> then tried to run monodevelop and it refused to start giving me some
> message about my PC's hostname not being set correctly in /etc/hosts.  I
> checked it and /etc/hosts was correct.  Must just be a glitch with
> monodevelop.  My question is what is it about Gentoo that relies so
> heavily on connecting to the internet?  My network was running just fine
> - just the connection between the cable modem and the internet was down,
> but everything inside my router should have been fine...
> 
I saw somewhere in portage a daemon that manages
connection/disconnection from the network.  I think it was for laptops.
 But now I don't know what it is called or where it is in portage.

I wonder if it would work?

Rob.

-- 
----------------------------------
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http://home.comcast.net/~europa100
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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Devon Miller]

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On 11/28/05, Rob <europa100@comcast.net> wrote:
>
>
> I saw somewhere in portage a daemon that manages
> connection/disconnection from the network.  I think it was for laptops.
> But now I don't know what it is called or where it is in portage.
>
> I wonder if it would work?
>
> Rob.
>

That would be ifplugd. It listens for a variety of state changes such as
insertion of a pcmcia/cardbus/usb NIC or presense/absence of carrier on the
ethernet device. When a device becomes available, it runs "/etc/init.d/net.
device start" and when the device goes away/loses carrier, it runs
"/etc/init.d/net.device stop".

That should address the first of Michael's issues. I've not used
monodevelop, but as I recall from using VS.Net, it wants to talk to the
local webserver. Check what /usr/bin/hostname returns when your connected
and when you're offline. Make sure when you go offline it isn't still
returning something like foo.cablecompany.net. I have my machine's hostname
set in /etc/conf.d/hostname and hostname is in my boot run level.

-dcm-

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Re: [gentoo-user] OT - Why is Gentoo so slow when internet is out?

[Neil Bothwick]

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On Tue, 29 Nov 2005 09:27:23 -0500, Devon Miller wrote:

> > I saw somewhere in portage a daemon that manages
> > connection/disconnection from the network.  I think it was for
> > laptops. But now I don't know what it is called or where it is in
> > portage.

> That would be ifplugd. It listens for a variety of state changes such as
> insertion of a pcmcia/cardbus/usb NIC or presense/absence of carrier on
> the ethernet device. When a device becomes available, it runs
> "/etc/init.d/net. device start" and when the device goes away/loses
> carrier, it runs "/etc/init.d/net.device stop".

I don't think ifplugd will help here. it only checks the link beat on the
ethernet connection. As long as the computer is connected to the cable
modem, it will report the link as up, even if the connection from the
modem to the Internet is down.


-- 
Neil Bothwick

I doubt therefore I might be.

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