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Man Pages


Manual Reference Pages  -  RELUP (4)

NAME

relup - Release upgrade file

CONTENTS

Description

DESCRIPTION

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 is to be located in directory $ROOT/releases/Vsn.

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(): Current release version.
UpFromVsn = string(): Earlier version of the release to upgrade from.
Descr = term(): A user-defined parameter passed from the function systools:make_relup/3,4. It is used in the return value of release_handler:install_release/1,2.
Instructions: 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(): Earlier version of the release to downgrade to.

SEE ALSO

app(4), appup(4), rel(4), release_handler(3), systools(3)

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Ericsson AB RELUP (5) sasl 2.7

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