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authorSiri Hansen <[email protected]>2011-10-24 14:25:15 +0200
committerSiri Hansen <[email protected]>2011-11-17 16:47:29 +0100
commit281fb9929e2cdcfdaf95e0b90b3b690b78535ddb (patch)
tree2e296a38709a1fe03a9adc076e0e30ba3f25ea38 /system/doc/design_principles/appup_cookbook.xml
parent1e344f34bf9f3fcc0a75b2980ab79e60d4cd71fc (diff)
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Document upgrade instructions restart_new_emulator and restart_emulator
Diffstat (limited to 'system/doc/design_principles/appup_cookbook.xml')
-rw-r--r--system/doc/design_principles/appup_cookbook.xml43
1 files changed, 30 insertions, 13 deletions
diff --git a/system/doc/design_principles/appup_cookbook.xml b/system/doc/design_principles/appup_cookbook.xml
index bc61578953..eebe6ba7b4 100644
--- a/system/doc/design_principles/appup_cookbook.xml
+++ b/system/doc/design_principles/appup_cookbook.xml
@@ -4,7 +4,7 @@
<chapter>
<header>
<copyright>
- <year>2003</year><year>2009</year>
+ <year>2003</year><year>2011</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
@@ -603,25 +603,42 @@ code_change(_OldVsn, State, port) ->
</section>
<section>
- <title>Emulator Restart</title>
- <p>If the emulator can or should be restarted, the very simple
- <c>.relup</c> file can be created manually:</p>
+ <title>Emulator Restart and Upgrade</title>
+ <p>There are two upgrade instructions that will restart the emulator:</p>
+ <taglist>
+ <tag><c>restart_new_emulator</c></tag>
+ <item>Intended for when erts, kernel, stdlib or sasl is
+ upgraded. It is automatically added when the relup file is
+ generated by <c>systools:make_relup/3,4</c>. It is executed
+ before all other upgrade instructions. See
+ <seealso marker="release_handling#restart_new_emulator_instr">Release
+ Handling</seealso> for more information about this
+ instruction.</item>
+ <tag><c>restart_emulator</c></tag>
+ <item>Used when a restart of the emulator is required after all
+ other upgrade instructions are executed. See
+ <seealso marker="release_handling#restart_emulator_instr">Release
+ Handling</seealso> for more information about this
+ instruction.</item>
+ </taglist>
+
+ <p>If an emulator restart is necessary and no upgrade instructions
+ are needed, i.e. if the restart itself is enough for the
+ upgraded applications to start running the new versions, a very
+ simple <c>.relup</c> file can be created manually:</p>
<code type="none">
{"B",
[{"A",
[],
- [restart_new_emulator]}],
+ [restart_emulator]}],
[{"A",
[],
- [restart_new_emulator]}]
+ [restart_emulator]}]
}.</code>
- <p>This way, the release handler framework with automatic packing
- and unpacking of release packages, automatic path updates etc. can
- be used without having to specify <c>.appup</c> files.</p>
- <p>If some transformation of persistent data, for example database
- contents, needs to be done before installing the new release
- version, instructions for this can be added to the <c>.relup</c>
- file as well.</p>
+ <p>In this case, the release handler framework with automatic
+ packing and unpacking of release packages, automatic path
+ updates etc. can be used without having to specify <c>.appup</c>
+ files.</p>
</section>
</chapter>