Mailing List Archive: load balance

load balance

Apr 30, 2003, 10:18 AM

Post #1 of 5 (3385 views)

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Hi,

Does mod_bakchand knows when a web server is not responding ?

I want to build a web server (2 machines) with load balance, but what if =
one of
then go down (not the machine, the httpd service) ? The live machine =
will know
(will recalculate the cost to each one in "real time") that the other =
one has died ?

Thank you,

Eduardo.
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Hi,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Does mod_bakchand knows when a web =
server is not=20
responding ?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I want to build a web server (2 =
machines) with load=20
balance, but what if one of</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>then go down (not the machine, the =
httpd service) ?=20
The live machine will know</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>(will recalculate the cost to each one =
in "real=20
time") that the other one has died ?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thank you,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Eduardo.</FONT></DIV></BODY></HTML>

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load balance [ In reply to ]

jesus at omniti

Apr 30, 2003, 10:56 AM

Post #2 of 5 (3286 views)

Permalink

Eduardo wrote:
> Hi,
>
> Does mod_bakchand knows when a web server is not responding ?
>
> I want to build a web server (2 machines) with load balance, but what if
> one of
> then go down (not the machine, the httpd service) ? The live machine
> will know
> (will recalculate the cost to each one in "real time") that the other
> one has died ?

Yes. mod_backhand knows when any of the machines are unavailable.

--
Theo Schlossnagle
Principal Consultant
OmniTI Computer Consulting, Inc. -- http://www.omniti.com/
Phone: +1 410 872 4910 x201 Fax: +1 410 872 4911
1024D/82844984/95FD 30F1 489E 4613 F22E 491A 7E88 364C 8284 4984
2047R/33131B65/71 F7 95 64 49 76 5D BA 3D 90 B9 9F BE 27 24 E7

load balance [ In reply to ]

backhand-users at wavecentral

Apr 30, 2003, 6:52 PM

Post #3 of 5 (3273 views)

Permalink

On Wed, Apr 30, 2003 at 02:32:51PM -0700, Jim Richardson wrote:
> On Wed, Apr 30, 2003 at 01:56:04PM -0400, Theo E. Schlossnagle wrote:
> > Eduardo wrote:
> > >Hi,
> > >
> > >Does mod_bakchand knows when a web server is not responding ?
> > >
> > >I want to build a web server (2 machines) with load balance, but what if
> > >one of
> > >then go down (not the machine, the httpd service) ? The live machine
> > >will know
> > >(will recalculate the cost to each one in "real time") that the other
> > >one has died ?
> >
> > Yes. mod_backhand knows when any of the machines are unavailable.
>
> I am considering mod_backhand on a three server system, two of them are
> LAMP backends, and the third, is the frontend site. I noticed in the
> docs for mod_backhand that it seemed really geared for massive clusters
> of machines. Would I see a real benefit with only 2 (or maybe 3 if I can
> rearange some stuff) machines in the cluster?

What kind of benefit are you looking for? The most obvious benefit would be
the redundancy on your web services. There are definate benefits to using
mod_backhand for LAMP setups. Not sure how your mysql is setup so I can't
comment any further.

Cheers,
-.mag

load balance [ In reply to ]

eakinto at buscape

May 2, 2003, 3:30 AM

Post #4 of 5 (3275 views)

Permalink

Hi,

Basicly I'm looking for redundancy on my Web Server (an image server, that
is
not using Mysql, PHP and CGI).

I've already tried RedHat Piranha with no success using two servers
and know I'm testing the balance (do the loadbalance and failover) and
considering to use mod_backhand.

Thank you,

Eduardo.

----- Original Message -----
From: "Mark A. Garcia" <backhand-users@wavecentral.com>
To: <backhand-users@lists.backhand.org>
Sent: Wednesday, April 30, 2003 10:52 PM
Subject: Re: [m_b_users] load balance

> On Wed, Apr 30, 2003 at 02:32:51PM -0700, Jim Richardson wrote:
> > On Wed, Apr 30, 2003 at 01:56:04PM -0400, Theo E. Schlossnagle wrote:
> > > Eduardo wrote:
> > > >Hi,
> > > >
> > > >Does mod_bakchand knows when a web server is not responding ?
> > > >
> > > >I want to build a web server (2 machines) with load balance, but what
if
> > > >one of
> > > >then go down (not the machine, the httpd service) ? The live machine
> > > >will know
> > > >(will recalculate the cost to each one in "real time") that the other
> > > >one has died ?
> > >
> > > Yes. mod_backhand knows when any of the machines are unavailable.
> >
> > I am considering mod_backhand on a three server system, two of them are
> > LAMP backends, and the third, is the frontend site. I noticed in the
> > docs for mod_backhand that it seemed really geared for massive clusters
> > of machines. Would I see a real benefit with only 2 (or maybe 3 if I can
> > rearange some stuff) machines in the cluster?
>
> What kind of benefit are you looking for? The most obvious benefit would
be
> the redundancy on your web services. There are definate benefits to using
> mod_backhand for LAMP setups. Not sure how your mysql is setup so I can't
> comment any further.
>
> Cheers,
> -.mag
>
> _______________________________________________
> backhand-users mailing list
> backhand-users@lists.backhand.org
> http://lists.backhand.org/mailman/listinfo/backhand-users

load balance [ In reply to ]

jesus at omniti

May 2, 2003, 7:21 AM

Post #5 of 5 (3274 views)

Permalink

Eduardo wrote:
> Hi,
>
> Basicly I'm looking for redundancy on my Web Server (an image server, that
> is
> not using Mysql, PHP and CGI).
>
> I've already tried RedHat Piranha with no success using two servers
> and know I'm testing the balance (do the loadbalance and failover) and
> considering to use mod_backhand.

With static image servers there is rarely a need to "load balance". A single
Apache server can server upward of 100Mbs if tuned well. There is definitely
an issue of high-availability. As you said yourself, "I'm looking for
redundancy".

Use wackamaole: http://www.backhand.org/wackamole/

We have used it for the exact same purpose with great success.

--
Theo Schlossnagle
Principal Consultant
OmniTI Computer Consulting, Inc. -- http://www.omniti.com/
Phone: +1 410 872 4910 x201 Fax: +1 410 872 4911
1024D/82844984/95FD 30F1 489E 4613 F22E 491A 7E88 364C 8284 4984
2047R/33131B65/71 F7 95 64 49 76 5D BA 3D 90 B9 9F BE 27 24 E7