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042a923ad5
Since babbbb5 and the introduction of LZ4 in pg_receivewal, the compression of the WAL archived is controlled by two options: - --compression-method with "gzip", "none" or "lz4" as possible value. - --compress=N to specify a compression level. This includes a backward-incompatible change where a value of 0 leads to a failure instead of no compression enforced. This commit takes advantage of a4b5754 and 3603f7c to rework the compression options of pg_receivewal, as of: - The removal of --compression-method. - The extenction of --compress to use the same grammar as pg_basebackup, with a METHOD:DETAIL format, where a METHOD is "gzip", "none" or "lz4" and a DETAIL is a comma-separated list of options, the only keyword supported is now "level" to control the compression level. If only an integer is specified as value of this option, "none" is implied on 0 and "gzip" is implied otherwise. This brings back --compress to be backward-compatible with ~14, while still supporting LZ4. This has also the advantage of centralizing the set of checks used by pg_receivewal to validate its compression options. Author: Michael Paquier Reviewed-by: Robert Haas, Georgios Kokolatos Discussion: https://postgr.es/m/YlPQGNAAa04raObK@paquier.xyz
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.