NAME

gdal-vsi-sozip - SOZIP (Seek-Optimized ZIP) related commands.

Added in version 3.11.

DESCRIPTION

The gdal vsi sozip utility can be used to:

create a SOZip (Seek-Optimized ZIP) file
append files to an existing ZIP/SOZip file
list the contents of a ZIP/SOZip file
validate a SOZip file
convert an existing Zip file into a SOZip optimized one

SYNOPSIS

Usage: gdal vsi sozip <SUBCOMMAND> [OPTIONS]
where <SUBCOMMAND> is one of:


  - create:   Create a Seek-optimized ZIP (SOZIP) file.


  - list:     List content of a ZIP file, with SOZIP related information.


  - optimize: Create a Seek-optimized ZIP (SOZIP) file from a regular ZIP file.


  - validate: Validate a ZIP file, possibly using SOZIP optimization.
Common Options:


  -h, --help              Display help message and exit


  --json-usage            Display usage as JSON document and exit


  --config <KEY>=<VALUE>  Configuration option [may be repeated]

GDAL VSI SOZIP CREATE

Description

Adds one or several files to a new or existing zip file.

Synopsis

Usage: gdal vsi sozip create [OPTIONS] <INPUT> <OUTPUT>
Create a Seek-optimized ZIP (SOZIP) file.
Positional arguments:


  -i, --input <INPUT>                                          Input filenames [may be repeated] [required]


  -o, --output <OUTPUT>                                        Output ZIP filename [required]
Common Options:


  -h, --help                                                   Display help message and exit


  --json-usage                                                 Display usage as JSON document and exit


  --config <KEY>=<VALUE>                                       Configuration option [may be repeated]


  --progress                                                   Display progress bar
Options:


  --overwrite                                                  Whether overwriting existing output is allowed


  -r, --recursive                                              Travels the directory structure of the specified directories recursively


  -j, --junk-paths, --no-paths                                 Store just the name of a saved file, and do not store directory names


  --enable-sozip <ENABLE-SOZIP>                                Whether to automatically/systematically/never apply the SOZIP optimization. ENABLE-SOZIP=auto|yes|no (default: auto)


  --sozip-chunk-size <value in bytes or with K/M suffix>       Chunk size for a seek-optimized file (default: 32768)


  --sozip-min-file-size <value in bytes or with K/M/G suffix>  Minimum file size to decide if a file should be seek-optimized (default: 1 MB)


  --content-type <CONTENT-TYPE>                                Store the Content-Type of the file being added.


  -q, --quiet                                                  Quiet mode

Options

-i, --input <INPUT>: Input filenames. Required. Several file names or directory names accepted.

-o, --output <OUTPUT>: Output ZIP filename. Required. Must have a .zip extension

--overwrite: Whether overwriting existing output is allowed.

-r, --recursive: Travels the directory structure of the specified directories recursively.

-j, --junk-paths, --no-paths: Store just the name of a saved file (junk the path), and do not store directory names. By default, sozip will store the full path (relative to the current directory).

--enable-sozip auto|yes|no: In auto mode, a file is seek-optimized only if its size is above the value of --sozip-min-file-size. In yes mode, all input files will be seek-optimized. In no mode, no input files will be seek-optimized.

--sozip-chunk-size <value>: Chunk size for a seek-optimized file. Defaults to 32768 bytes. The value is specified in bytes, or K and M suffix (optionally preceded by a space) can be respectively used to specify a value in kilo-bytes or mega-bytes.

--sozip-min-file-size <value>: Minimum file size to decide if a file should be seek-optimized, in --enable-sozip=auto mode. Defaults to 1 MB byte. The value is specified in bytes, or K, M or G suffix (optionally preceded by a space) can be respectively used to specify a value in kilo-bytes, mega-bytes or giga-bytes.

--content-type <value>: Store the Content-Type for the file being added as a key-value pair in the extra field extension 'KV' (0x564b) dedicated to storing key-value pair metadata

-q, --quiet: Do not output any informative message (only errors).

Multithreading

The GDAL_NUM_THREADS configuration option can be set to ALL_CPUS or a integer value to specify the number of threads to use for SOZip-compressed files. Defaults to ALL_CPUS.

Example 1: Create a, potentially seek-optimized, ZIP file with the content of my.gpkg

gdal vsi sozip create my.gpkg my.gpkg.zip

Example 2: Create a, potentially seek-optimized, ZIP file from the content of a source directory:

gdal vsi sozip create -r source_dir/ my.gpkg.zip

GDAL VSI SOZIP OPTIMIZE

Description

Create a new zip file from the content of an existing one, possibly applying SOZip optimization when relevant.

Synopsis

Usage: gdal vsi sozip optimize [OPTIONS] <INPUT> <OUTPUT>
Create a Seek-optimized ZIP (SOZIP) file from a regular ZIP file.
Positional arguments:


  -i, --input <INPUT>                                          Input ZIP filename [required]


  -o, --output <OUTPUT>                                        Output ZIP filename [required]
Common Options:


  -h, --help                                                   Display help message and exit


  --json-usage                                                 Display usage as JSON document and exit


  --config <KEY>=<VALUE>                                       Configuration option [may be repeated]


  --progress                                                   Display progress bar
Options:


  --overwrite                                                  Whether overwriting existing output is allowed


  --enable-sozip <ENABLE-SOZIP>                                Whether to automatically/systematically/never apply the SOZIP optimization. ENABLE-SOZIP=auto|yes|no (default: auto)


  --sozip-chunk-size <value in bytes or with K/M suffix>       Chunk size for a seek-optimized file (default: 32768)


  --sozip-min-file-size <value in bytes or with K/M/G suffix>  Minimum file size to decide if a file should be seek-optimized (default: 1 MB)


  -q, --quiet                                                  Quiet mode

Options

-i, --input <INPUT>: Input ZIP filename. Required.

-o, --output <OUTPUT>: Output ZIP filename. Required. Must have a .zip extension

--overwrite: Whether overwriting existing output is allowed.

--enable-sozip auto|yes|no: In auto mode, a file is seek-optimized only if its size is above the value of --sozip-chunk-size. In yes mode, all input files will be seek-optimized. In no mode, no input files will be seek-optimized.

--sozip-chunk-size <value>: Chunk size for a seek-optimized file. Defaults to 32768 bytes. The value is specified in bytes, or K and M suffix can be respectively used to specify a value in kilo-bytes or mega-bytes.

--sozip-min-file-size <value>: Minimum file size to decide if a file should be seek-optimized, in --enable-sozip=auto mode. Defaults to 1 MB byte. The value is specified in bytes, or K, M or G suffix can be respectively used to specify a value in kilo-bytes, mega-bytes or giga-bytes.

-q, --quiet: Do not output any informative message (only errors).

Multithreading

The GDAL_NUM_THREADS configuration option can be set to ALL_CPUS or a integer value to specify the number of threads to use for SOZip-compressed files. Defaults to ALL_CPUS.

Example 3: Create a, potentially seek-optimized, ZIP file sozip_optimized.zip from an existing ZIP file in.zip.

gdal vsi sozip optimize in.zip sozip_optimized.zip

GDAL VSI SOZIP LIST

Description

List the files contained in the zip file in an output similar to Info-ZIP unzip utility, but with the addition of a column indicating whether each file is seek-optimized.

Synopsis

Usage: gdal vsi sozip list [OPTIONS] <INPUT>
List content of a ZIP file, with SOZIP related information.
Positional arguments:


  -i, --input <INPUT>     Input ZIP filename [required]
Common Options:


  -h, --help              Display help message and exit


  --json-usage            Display usage as JSON document and exit


  --config <KEY>=<VALUE>  Configuration option [may be repeated]

Options

-i, --input <INPUT>: Input ZIP filename. Required.

Example 4: List contents of my.zip.

gdal vsi sozip list my.zip

GDAL VSI SOZIP VALIDATE

Validates a SOZip file. Baseline ZIP validation is done in a light way, limited to being able to browse through ZIP records with the InfoZIP-based ZIP reader used by GDAL. But validation of the SOZip-specific aspects is done in a more thorougful way.

Synopsis

Usage: gdal vsi sozip list [OPTIONS] <INPUT>
List content of a ZIP file, with SOZIP related information.
Positional arguments:


  -i, --input <INPUT>     Input ZIP filename [required]
Common Options:


  -h, --help              Display help message and exit


  --json-usage            Display usage as JSON document and exit


  --config <KEY>=<VALUE>  Configuration option [may be repeated]

Options

-i, --input <INPUT>: Input ZIP filename. Required.

-q, --quiet: Do not output any informative message (only errors).

-v, --verbose: Turn on verbose mode.

Examples

Example 5: Validate my.zip.

gdal vsi sozip validate my.zip

AUTHOR

Even Rouault <even.rouault@spatialys.com>

COPYRIGHT

1998-2025