Minor fixes.

[homepage.git] / mypapers / 200802-bootsequence / 200802-bootsequence.html

diff --git a/mypapers/200802-bootsequence/200802-bootsequence.html b/mypapers/200802-bootsequence/200802-bootsequence.html
index d71ea78cd52eef2d39a47169924a707d90202ecd..772f7c7b143424cd032fbd95c639b4e5ec2ee0cd 100644 (file)
--- a/mypapers/200802-bootsequence/200802-bootsequence.html
+++ b/mypapers/200802-bootsequence/200802-bootsequence.html
@@ -43,7 +43,7 @@ when the order they need to run in is known.
 This talk is about how all of this can be done with Debian.
 -->
 
 This talk is about how all of this can be done with Debian.
 -->
 

-<h2>Summary</h2>
+<h2>Outline</h2>

 
 <!--
 
 
 <!--
 


@@ -55,6 +55,7 @@ This talk is about how all of this can be done with Debian.
  - how does it work in debian
  - effect on the boot
  - insserv
  - how does it work in debian
  - effect on the boot
  - insserv

+   - how to test it

  - speed change?
  - concurrency
 
  - speed change?
  - concurrency
 


@@ -142,8 +143,12 @@ Getting it right is often hard.
 default be the reverse of the start sequence.  It isn't.
 
 <p>Reordering is hard and require cooperation between maintainers of
 default be the reverse of the start sequence.  It isn't.
 
 <p>Reordering is hard and require cooperation between maintainers of

-all packages involved.  Given two packages with two scripts inserted
-with the default settings in Debian:
+all packages involved.
+
+<h2>The ordering problem - an example</h2>
+
+<p>Given two packages with two scripts inserted with the default
+settings in Debian:

 
 <p>Package A: script_a sequence 20 (start and stop)
 <br>Package B: script_b sequence 20 (start and stop)
 
 <p>Package A: script_a sequence 20 (start and stop)
 <br>Package B: script_b sequence 20 (start and stop)


@@ -160,7 +165,7 @@ B and C to get something like this:
 have to change their sequence number too.  Only way to discover this
 is by a lot of testing, or documenting script dependencies.
 
 have to change their sequence number too.  Only way to discover this
 is by a lot of testing, or documenting script dependencies.
 

-<h2>A ordering solution</h2>
+<h2>An ordering solution</h2>

 
 <p>Let each script document its dependency, and generate sequence
 numbers using this dependency information.  Example:
 
 <p>Let each script document its dependency, and generate sequence
 numbers using this dependency information.  Example:


@@ -176,7 +181,9 @@ numbers using this dependency information.  Example:
 <br>script_a start seq 3, stop seq 1
 
 <p>An implementation of this system is the dependency based boot
 <br>script_a start seq 3, stop seq 1
 
 <p>An implementation of this system is the dependency based boot

-sequencing, provided in the insserv package.</p>
+sequencing, provided in the insserv package.  Uses format specified in
+Linux Software Base to document dependencies.</p>
+

 
 
 <h2>LSB headers for insserv</h2>
 
 
 <h2>LSB headers for insserv</h2>


@@ -228,32 +235,33 @@ is needed only by scripts starting services logging to syslog.</p>
 
 <dl>
 
 
 <dl>
 

-<dt>$local_fs          
-<dd>all local file systems are mounted.
+<dt>$local_fs
+<dd>all local file systems are mounted. (In Debian, / and /var/ is available)

 
 

-<dt>$network           
+<dt>$network

 <dd>basic networking support is available. Example: a server program
 <dd>basic networking support is available. Example: a server program

-could listen on a socket.
+could listen on a socket. (In Debian, network interfaces are up)

 
 

-<dt>$portmap           
+<dt>$portmap

 <dd>daemons providing SunRPC/ONCRPC portmapping service as defined in
 RFC 1833: Binding Protocols for ONC RPC Version 2 (if present) are
 running.
 
 <dd>daemons providing SunRPC/ONCRPC portmapping service as defined in
 RFC 1833: Binding Protocols for ONC RPC Version 2 (if present) are
 running.
 

-<dt>$remote_fs         
-<dd>all remote file systems are available. In some configurations, file
-systems such as /usr may be remote. Many applications that require
-$local_fs will probably also require $remote_fs.
+<dt>$remote_fs
+<dd>all remote file systems are available. In some configurations,
+file systems such as /usr may be remote. Many applications that
+require $local_fs will probably also require $remote_fs. (In Debian,
+/usr/ and NFS directories are guaranteed to be mounted)

 
 

-<dt>$time              
+<dt>$time

 <dd>the system time has been set, for example by using a network-based
 time program such as ntp or rdate, or via the hardware Real Time
 Clock.
 
 <dd>the system time has been set, for example by using a network-based
 time program such as ntp or rdate, or via the hardware Real Time
 Clock.
 

-<dt>$syslog            
+<dt>$syslog

 <dd>system logger is operational.
 
 <dd>system logger is operational.
 

-<dt>$named             
+<dt>$named

 <dd>IP name-to-address translation, using the interfaces described in
 this specification, are available to the level the system normally
 provides them. Example: if a DNS query daemon normally provides this
 <dd>IP name-to-address translation, using the interfaces described in
 this specification, are available to the level the system normally
 provides them. Example: if a DNS query daemon normally provides this