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From Igor Sysoev ...@rambler-co.ru>
Subject Re: Report on mod_accel and mod_deflate
Date Thu, 20 Dec 2001 13:07:25 GMT
On Thu, 20 Dec 2001, Jeremy Howard wrote:

Thank you, Jeremy.
Here is some comments.

> OK, enough evangelism. On to practical matters. Many of the following
> snippets and comments were provided to me by Igor in private email, so thank
> him, not me. Firstly, here's how to compile everything (including mod_ssl on
> the front-end) and install it into /usr/local/apache_accel:
> ----
> tar -zxvf mod_accel-1.0.7.tar.gz
> tar -zxvf mod_deflate-1.0.9.tar.gz
> tar -zxvf mm-1.1.3.tar.gz
> cd mm-1.1.3
> ./configure --disable-shared
> make
> 
> cd ../mod_ssl-2.8.5-1.3.22
> ./configure --with-apache=../apache_1.3.22_accel/ \
>   --with-crt=/INSERT_APPROPRIATE_PATH.crt \
>   --with-key=/INSERT_APPROPRIATE_PATH.key
> 
> cd ../mod_accel-1.0.7
> ./configure --with-apache=../apache_1.3.22_accel/ \
>   --with-eapi=../mod_ssl-2.8.5-1.3.22/pkg.eapi/
> make

You don't need to use mod_ssl but you need EAPI distributed with mod_ssl.
So if you don't use mod_ssl you need untar it only and set path to EAPI:

cd ../mod_accel-1.0.7
./configure --with-apache=../apache_1.3.22_accel/ \
   --with-eapi=../mod_ssl-2.8.5-1.3.22/pkg.eapi/
make

But if use mod_ssl then you can not to specify EAPI path - mod_ssl's
configure set it on Apache source itself:

cd ../mod_accel-1.0.7
./configure --with-apache=../apache_1.3.22_accel/
make

> cd ../mod_deflate-1.0.9
> ./configure --with-apache=../apache_1.3.22_accel/
> make
> 
> cd ../apache_1.3.22_accel/
> EAPI_MM=../mm-1.1.3 SSLBASE=SYSTEM ./configure --enable-rule=EAPI \
>   --prefix=/usr/local/apache_accel --disable-rule=EXPAT \
>   --enable-module=most \
>   --enable-module=rewrite \
>   --activate-module=src/modules/accel/libaccel.a \
>   --activate-module=src/modules/extra/mod_deflate.o
> make
> make install
> 
> mkdir /var/accelcache
> chown nobody:nobody /var/accelcache/
> /usr/local/apache_accel/bin/apachectl startssl
> ----
> 
> Now, in /usr/local/apache_accel/conf/httpd.conf, append the following:
> ----
>    AccelCacheRoot  /var/accelcache 1
>    AccelNoCache    on
>    AccelPass    /mail/        http://127.0.0.1:8080/mail/
>    AccelWaitBeforeBodyRead  100
>    AccelUnlinkNoCached  off
>    AccelSetXHost on
>    AccelSetXRealIP on
>    AccelSetXURL on
> ----
> 
> This creates an HTTP accelerator without any caching. I don't know much
> about the caching directives and haven't tried them out, so I can't provide
> any guidance there.
> 
> The AccelCacheRoot directive sets the number of levels of subdirectories in
> the cache. 16 first level subdirectories named 0 .. f and 256 second level
> subdirectories named 00 .. ff are used by default (i.e. "AccelCacheRoot
> <path> 1 2"). Since I'm not caching, my config above does not specify any
> directory hashing (i.e. "AccelCacheRoot <path> 1").

AccelCacheRoot allow to set up to 3 levels of two type subdirectories -
named 0 .. f and 00 .. ff. Also AccelCacheRoot has parameter 'noauto'
that specify do not create automaticaly all nested subdirectories.
They shoud be created before with create_cache script.

> Here's the config for mod_deflate:
> ----
>    DeflateEnable On
>    DeflateMinLength 3000
>    DeflateCompLevel 1
>    DeflateProxied Off

This is default settings of DeflateCompLevel and DeflateProxied.

>    DeflateHTTP 1.0
>    DeflateDisableRange "MSIE 4."
> ----
> 
> DeflateProxied Off means that anything with a 'Via' header is not
> proxied--Igor says that some proxies are broken so this is best to be safe.

is not compressed

> And MSIE 4 apparently is a bit broken too. By default only text/html is
> compressed. DeflateCompLevel 1 provides adequate compression for text.

Igor Sysoev


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