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relup
Langue: en
Version: 300769 (debian - 07/07/09)
Section: 4 (Pilotes et protocoles réseau)
Sommaire
NAME
relup - Release upgrade fileDESCRIPTION
The release upgrade file describes how a release is upgraded in a running system.
This file is automatically generated by systools:make_relup/3, 4, using a release resource file (.rel), application resource files (.app) and application upgrade files (.appup) as input.
FILE SYNTAX
In a target system, the release upgrade file should be located in the OTP_ROOT/erts-EVsn/Vsn directory.
The relup file contains one single Erlang term, which defines the instructions used to upgrade the release. The file has the following syntax:
{Vsn, [{UpFromVsn, Descr, Instructions}, ...], [{DownToVsn, Descr, Instructions}, ...]}.
-
- *
- Vsn = string() is the current version of the release.
- *
- UpFromVsn = string() is an earlier version of the release to upgrade from.
- *
- Descr = term() is a user defined parameter passed from the systools:make_relup/3, 4 function. It will be used in the return value of release_handler:install_release/1, 2.
- *
- Instructions is a list of low-level release upgrade instructions, see appup(4).
It consists of the release upgrade instructions from the respective application upgrade files (high-level instructions are translated to low-level instructions), in the same order as in the start script.
- *
- DownToVsn = string() is an earlier version of the release to downgrade to.
When upgrading from UpFromVsn with release_handler:install_release/1, 2, there does not have to be an exact match of versions, but UpFromVsn can be a sub-string of the current release version.
SEE ALSO
app(4), appup(4), rel(4), release_handler(3erl), systools(3erl)
Contenus ©2006-2024 Benjamin Poulain
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