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
