Postgres Pro Enterprise : Documentation: 15: G.2. pgpro_datactl — manage Postgres Pro Enterprise data files : Postgres Professional

G.2. pgpro_datactl — manage Postgres Pro Enterprise data files
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G.2. pgpro_datactl — manage Postgres Pro Enterprise data files

G.2.1. Overview
G.2.2. Installation
G.2.3. Commands

G.2.1. Overview

The pgpro_datactl utility provides tools for managing Postgres Pro Enterprise data files, including a module for CFS (Compressed File Storage) operations. This module offers the following functionalities:

Retrieving metadata from compressed files, including their compression algorithm and location.
Unpacking CFS files for further analysis.

G.2.2. Installation

pgpro_datactl is provided with Postgres Pro Enterprise as a separate pre-built package pgpro-datactl-ent-15 (for the detailed installation instructions, see Chapter 17).

G.2.3. Commands

pgpro_datactl supports the following commands:

G.2.3.1. unpack

pgpro_datactl unpack --source=source_path --target=target_path
[--calg=compression_algorithm] [-verbose] [--log-level=logging_level] [--help]

Unpacks CFS files.

-s=source_path --source=source_path

Specifies the path to a compressed file or directory.

Note

The path must be in the directory named PG_version_date that contains the pg_compression file.

-t=target_path --target=target_path

Specifies the path to a directory where the unpacked files will be placed.

If the source and target directories are the same, files are unpacked with a .dec extension.

-c=compression_algorithm --calg=compression_algorithm

Specifies the compression algorithm used. If omitted, the unpack command will take this value from the pg_compression file.

-v --verbose

Enables detailed logging.

--log-level=logging_level

Sets the logging level. Possible values: info, warning, error.

Example:

pgpro_datactl unpack -s /path/to/archive.cfs -t /path/to/destination -c zstd

In this example, unpack extracts archive.cfs compressed with the zstd algorithm into the directory /path/to/destination.

G.2.3.2. probe

pgpro_datactl probe --source=source_path [--log-level=logging_level] [--help]

Analyzes the specified file and identifies the following:

Compression type: zlib or zstd compression algorithm.
Fragmentation level: Analyzes the corresponding *.cfm file (if available) and reports the percentage of unused storage space in the physical file.
Whether the file belongs to CFS: Checks the presence of an associated *.cfm file, which indicates whether the file belongs to a CFS archive.

-s=source_path --source=source_path: Specifies the path to the target file.
--log-level=logging_level: Sets the logging level. Possible values: info, warning, error.

Example output:

Probing path: /data/sample.dat
Has cfm file: Yes
pg_compression: zstd
Actual compression: zstd
Fragmentation: 5%

In this example, the file is compressed with the zstd algorithm, is part of a CFS archive, and has a fragmentation level of five percent.

G.2.3.3. info

pgpro_datactl info --source=source_path [--log-level=logging_level] [--help]

Analyzes the file and displays the following information:

The file physical size, virtual size, and utilized file space in bytes.
Whether the garbage collector (GC) is active.
Whether the *.cfm file is present and accessible.

-s=source_path --source=source_path: Specifies the path to the target file.
--log-level=logging_level: Sets the logging level. Possible values: info, warning, error.

Example output:

Physical size: 10485760
Virtual size: 9437184
Used size: 7864320
GC active: Yes

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