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Posted to users@httpd.apache.org by Mario Ohnewald <ma...@gmx.de> on 2002/11/12 09:15:47 UTC
[users@httpd] Load balancing - Performanche
Hello!
My Scenario:
100MBit LAN, 150Users, big htmlpages. K6-500 and 256MB RAM.
My questions are:
- Is this Box fast enough for these requests? (Maybe half of the users might
access it at once) It´s a pure php/mysql.
- Does Load Balancing make sense in this case?
I haven´t read too much about load balancing yet, but i read that you can do
it with serveral hosts.
- It must be possible then to do load balancing with ONE host, but 2NICS,
right? (the host would be a 1,4GHz dual with 512MB RAM, which should do its
job!)
Cheers, Mario
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Re: [users@httpd] Load balancing - Performanche
Posted by Jacob Coby <jc...@listingbook.com>.
> My Scenario:
> 100MBit LAN, 150Users, big htmlpages. K6-500 and 256MB RAM.
> My questions are:
> - Is this Box fast enough for these requests? (Maybe half of the users
might
> access it at once) It´s a pure php/mysql.
No. Running php and mysql on that server will exhaust the RAM very, very
quickly. We can only run about 80 connections on a dual PIII 733 with 512mb
ram before it starts swapping (at about 60-70% cpu usage) -- and it only
does webserving. The database is on another computer. Your situation may
be different as our site is very database driven, and a single apache
process uses up to 30mb of ram. Average is 2-8mb.
> - Does Load Balancing make sense in this case?
No, not really. 75 connections a single server can easily handle, unless
you are looking for high availability. High availability and scalability is
why I'm implementing LVS here.
> I haven´t read too much about load balancing yet, but i read that you can
do
> it with serveral hosts.
> - It must be possible then to do load balancing with ONE host, but 2NICS,
> right? (the host would be a 1,4GHz dual with 512MB RAM, which should do
its
> job!)
I think you're confused as to where the CPU and ram needs to go: the load
balancer (the director) is basically a router, and a very lightweight system
can innundate your connection. The docs say that a 300mhz processor with
16mb of ram acting as the directory can easily flood a 100 mbit line. It
isn't until the gigE stuff that the director could become the bottleneck.
NO heavy computations are going on inside the director. It sniffs the
packets, and determines which real server gets them.
-Jacob
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Re: [users@httpd] Load balancing - Performanche
Posted by Sander Holthaus - Orange XL <in...@orangexl.com>.
I think you might have a problem with memory. 256mb is not much, and without
any tuning your box could cause some slowdowns.
Kind Regards,
Sander Holthaus
----- Original Message -----
From: "Scott Alexander" <mp...@mail.thefriend.com>
To: <us...@httpd.apache.org>
Sent: Tuesday, November 12, 2002 10:06 AM
Subject: Re: [users@httpd] Load balancing - Performanche
> Mario,
>
> I can't really say if the box will be big enough or not since I'm not
> familiar with the load that php causes as well as how much load your
> appliation will actually generate.
>
> You can use ab and do some load testing on the server to see how it will
> hold up to the load.
>
> As for load balancing, The normal goals of load balancing are high
> availability and/or distributing the load across more then one server
> either because the traffic is to much for one server to handle, or to
> allow you to use many smaller boxes instead of one large box.
>
> Load balancing wouldn't really give you anything other then another
> layer where problems could occur since you would still only be sending
> requests to a single box.
>
> Scott
>
>
>
> On Tue, 12 Nov 2002 09:15:47 +0100
> "Mario Ohnewald" <ma...@gmx.de> wrote:
>
> > Hello!
> > My Scenario:
> > 100MBit LAN, 150Users, big htmlpages. K6-500 and 256MB RAM.
> > My questions are:
> > - Is this Box fast enough for these requests? (Maybe half of the users
> > might access it at once) It´s a pure php/mysql.
> > - Does Load Balancing make sense in this case?
> >
> > I haven´t read too much about load balancing yet, but i read that you
> > can do it with serveral hosts.
> > - It must be possible then to do load balancing with ONE host, but
> > 2NICS, right? (the host would be a 1,4GHz dual with 512MB RAM, which
> > should do its job!)
> >
> > Cheers, Mario
> >
> >
> >
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> > Project. See <URL:http://httpd.apache.org/userslist.html> for more
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>
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>
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Re: [users@httpd] Load balancing - Performanche
Posted by Scott Alexander <mp...@mail.thefriend.com>.
Mario,
I can't really say if the box will be big enough or not since I'm not
familiar with the load that php causes as well as how much load your
appliation will actually generate.
You can use ab and do some load testing on the server to see how it will
hold up to the load.
As for load balancing, The normal goals of load balancing are high
availability and/or distributing the load across more then one server
either because the traffic is to much for one server to handle, or to
allow you to use many smaller boxes instead of one large box.
Load balancing wouldn't really give you anything other then another
layer where problems could occur since you would still only be sending
requests to a single box.
Scott
On Tue, 12 Nov 2002 09:15:47 +0100
"Mario Ohnewald" <ma...@gmx.de> wrote:
> Hello!
> My Scenario:
> 100MBit LAN, 150Users, big htmlpages. K6-500 and 256MB RAM.
> My questions are:
> - Is this Box fast enough for these requests? (Maybe half of the users
> might access it at once) It´s a pure php/mysql.
> - Does Load Balancing make sense in this case?
>
> I haven´t read too much about load balancing yet, but i read that you
> can do it with serveral hosts.
> - It must be possible then to do load balancing with ONE host, but
> 2NICS, right? (the host would be a 1,4GHz dual with 512MB RAM, which
> should do its job!)
>
> Cheers, Mario
>
>
>
> ---------------------------------------------------------------------
> The official User-To-User support forum of the Apache HTTP Server
> Project. See <URL:http://httpd.apache.org/userslist.html> for more
> info. To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> " from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
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