relup(5) Files relup(5)
NAME
relup - Release upgrade file
DESCRIPTION
The release upgrade file describes how a release is upgraded in a run-
ning 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 direc-
tory $ROOT/releases/Vsn.
The relup file contains one single Erlang term, which defines the in-
structions used to upgrade the release. The file has the following syn-
tax:
{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_re-
lup/3,4. It is used in the return value of release_handler:in-
stall_release/1,2.
Instructions:
A list of low-level release upgrade instructions, see appup(5). 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(5), appup(5), rel(5), release_handler(3erl), systools(3erl)
Ericsson AB sasl 4.0 relup(5)