RPM-PAYLOADFLAGS(7)

NAME
rpm-payloadflags - RPM payload flags

SYNOPSIS
w[FLAGS].TYPE

DESCRIPTION
The payload flags determine how the payload of an RPM package is compressed when the package is built. The flags are stored in the Payloadcompressor and Payloadflags tags of the package header, which are used to determine how to uncompress the payload contents during installation.

The peculiar syntax is directly inherited from librpm's Fopen() IO API, where w means opening a file for writing.

The following compression types are supported, but availability may vary depending on how RPM was compiled.

TYPE | Description
ufdio | uncompressed
gzdio | gzip (aka zlib)
bzdio | bzip2
xzdio | xz
lzdio | legacy lzma
zstdio | zstd

The compression FLAGS must be listed in the following order and can be any of:

FLAGS | Description | Types
<0-9> | compression level | all (ufdio ignores)
T[0-N] | number of threads (no number or 0 = autodetect) | xzdio, zstdio
L<0-9> | window size(see --long in zstd(1)) | zstdio

If a flag is omitted, the compressor's default value will be used.

A higher compression level generally means better compression ratio at the cost of increased resource use and compression times.

T is equivalent to T0 and causes the number of threads to be automatically detected. Note that while using threads can speed up compression considerably, it typically causes the compression ratio to go down, and make the output less predictable.

EXAMPLES
Mode | Description
w9.gzdio | gzip level 9, default for package payload
w9.bzdio | bzip2 level 9, bzip2's default
w.xzdio | xz default level
w7T16.xzdio | xz level 7 using 16 threads
w7T0.xzdio | xz level 7, autodetect no. of threads
w6.lzdio | lzma (legacy) level 6, lzma's default
w19T8.zstdio | zstd level 19 using 8 threads
w7T.zstdio | zstd level 7, autodetect no. of threads
w.ufdio | uncompressed

SEE ALSO
rpmbuild-config(5), rpm-config(5)

http://www.rpm.org/