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Version: Tenzir v4.11

decompress

Decompresses a stream of bytes.

Synopsis

decompress <codec>

Description

The decompress operator decompresses bytes in a pipeline incrementally with a known codec. The operator supports decompressing multiple concatenated streams of the same codec transparently.

The decompress operator is invoked automatically as a part of from if the source file has a file extension indicating compression. This behavior can be circumvented by using load directly.

Streaming Decompression

The operator uses Apache Arrow's compression utilities under the hood, and transparently supports all options that Apache Arrow supports for streaming decompression.

Besides the supported brotli, bz2, gzip, lz4, and zstd, Apache Arrow also ships with codecs for lzo, lz4_raw, lz4_hadoop and snappy, which only support oneshot decompression. Support for them is not currently implemented.

<codec>

An identifier of the codec to use. Currently supported are brotli, bz2, gzip, lz4, and zstd.

Examples

Import Suricata events from a Zstd-compressed file:

from eve.json.zst
| import

load file eve.json.zst
| decompress zstd
| read suricata
| import

Convert a Zstd-compressed file into an LZ4-compressed file:

from in.zst
| to out.lz4

load file in.zst
| decompress zstd
| compress lz4
| save file out.lz4