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From: Didier Michel <[email protected]>
To: [email protected]
Subject: Issues with PG15beta3
Date: Fri, 12 Aug 2022 16:52:36 +0200
Message-ID: <CAHCS47HiFv3HqBTXESfmuksDQixYpyekU+wYjB7W8jYrY=C4LA@mail.gmail.com> (raw)

Hello,

I am integrating new pg_basebackup zstd compression functionality in Barman
for compressed backup.

I do encounter two main issues when using zstd compression algorithm:

On ubuntu 18.04 :
- command exemple:  /usr/bin/pg_basebackup --dbname=dbname=replication
host=db options=-cdatestyle=iso port=5432 replication=true
user=barman_streaming
application_name=barman_streaming_backup -v --no-password
--pgdata=/var/lib/barman/main/base/20220811T162557/data --no-slot
--wal-method=none
--checkpoint=fast
 --format=tar
--compress=zstd:level=5
Interesting part is "--compress=zstd:level=5"
- pg_basebackup response:

pg_basebackup: checkpoint completed
pg_basebackup: error: this build does not support zstd compression



On Ubuntu 20.04 and 22.04:
The same command works. But When I try to introduce workers option (ie
"--compress=zstd:level=5,workers=2") it fails with following error:

pg_basebackup: checkpoint completed
pg_basebackup: error: could not set compression worker count to 2:
Unsupported parameter


Unless I have misused pg_basebackup (which is completely possible), I am
wondering if there could be an issue with PG packaging  or compilation
(especially for workers that triggers threads)

Hoping this can help deliver PG15.
Regards.

Didier Michel

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