我们的Barman安装似乎没有压缩WAL文件。wal文件的大小与Postgresql服务器上的大小相同。我们打开了streaming_archiver，在barman show-server中，压缩设置为pigz，但wal_compression显示为关闭。Barman版本为2.12。
提前谢谢。
barman show-server v2db:
Server v2db:
active: True
archive_timeout: 0
archiver: False
archiver_batch_size: 0
backup_directory: /var/lib/barman/v2db
backup_method: rsync
backup_options: BackupOptions({'concurrent_backup'})
bandwidth_limit: None
barman_home: /var/lib/barman
barman_lock_directory: /var/lib/barman
basebackup_retry_sleep: 30
basebackup_retry_times: 3
basebackups_directory: /var/lib/barman/v2db/base
check_timeout: 30
checkpoint_timeout: 300
compression: pigz
config_file: /etc/postgresql/12/main/postgresql.conf
connection_error: None
conninfo: host=**********
create_slot: manual
current_lsn: 50/35C7FF00
current_size: 49459828350
current_xlog: 000000010000005000000035
custom_compression_filter: None
custom_decompression_filter: None
data_checksums: off
data_directory: /var/lib/postgresql/12/main
description: Backups from DB
disabled: False
errors_directory: /var/lib/barman/v2db/errors
has_backup_privileges: True
hba_file: /etc/postgresql/12/main/pg_hba.conf
hot_standby: on
ident_file: /etc/postgresql/12/main/pg_ident.conf
immediate_checkpoint: False
included_files: ['/etc/postgresql/12/main/conf.d/9999-override.conf']
incoming_wals_directory: /var/lib/barman/v2db/incoming
is_in_recovery: False
is_superuser: True
last_backup_maximum_age: 7 days (latest backup: 2 hours, 52 minutes, 55 seconds )
max_incoming_wals_queue: None
max_replication_slots: 10
max_wal_senders: 10
minimum_redundancy: 3
msg_list: []
name: v2db
network_compression: False
parallel_jobs: 1
passive_node: False
path_prefix: /usr/lib/postgresql/12/bin
pg_receivexlog_compatible: True
pg_receivexlog_installed: True
pg_receivexlog_path: /usr/lib/postgresql/12/bin/pg_receivewal
pg_receivexlog_supports_slots: True
pg_receivexlog_synchronous: False
pg_receivexlog_version: 12.6
pgespresso_installed: False
post_archive_retry_script: None
post_archive_script: None
post_backup_retry_script: None
post_backup_script: None
post_delete_retry_script: None
post_delete_script: None
post_recovery_retry_script: None
post_recovery_script: None
post_wal_delete_retry_script: None
post_wal_delete_script: None
postgres_systemid: 6902948791374441963
pre_archive_retry_script: None
pre_archive_script: None
pre_backup_retry_script: None
pre_backup_script: None
pre_delete_retry_script: None
pre_delete_script: None
pre_recovery_retry_script: None
pre_recovery_script: None
pre_wal_delete_retry_script: None
pre_wal_delete_script: None
primary_ssh_command: None
recovery_options: RecoveryOptions({'get-wal'})
replication_slot: Record(slot_name='backup_pgsql_masterbarman', active=True, restart_lsn='50/35000000')
replication_slot_support: True
retention_policy: RECOVERY WINDOW OF 4 WEEKS
retention_policy_mode: auto
reuse_backup: link
server_txt_version: 12.12
slot_name: backup_pgsql_masterbarman
ssh_command: ssh -q postgres@******
streaming: True
streaming_archiver: True
streaming_archiver_batch_size: 0
streaming_archiver_name: barman_receive_wal
streaming_backup_name: barman_streaming_backup
streaming_conninfo: host=********
streaming_supported: True
streaming_systemid: 6902948791374441963
streaming_wals_directory: /var/lib/barman/v2db/streaming
synchronous_standby_names: ['']
tablespace_bandwidth_limit: None
timeline: 1
wal_compression: off
wal_keep_segments: 0
wal_level: replica
wal_retention_policy: MAIN
wals_directory: /var/lib/barman/v2db/wals
xlog_segment_size: 16777216
xlogpos: 50/35C7FF00
barman.conf：
[barman]
barman_home = /var/lib/barman
barman_user = barman
log_file = /var/log/barman/barman.log
; rsync or postgres
backup_method = rsync
parallel_jobs = 1
; Incremental backup support: possible values are off (default), link or copy
reuse_backup = link
; Identify the standard behavior for backup operations: possible values are
; exclusive_backup (default), concurrent_backup
backup_options = concurrent_backup
; Immediate checkpoint for backup command - default false
immediate_checkpoint = False
; Global bandwidth limit in KBPS - default 0 (meaning no limit)
;bandwidth_limit = 4000
; Default compression level: possible values are None (default), bzip2, gzip, pigz, pygzip or pybzip2
compression = pigz
; Enable network compression for data transfers - default false
network_compression = False
; Number of retries of data copy during base backup after an error - default 0
basebackup_retry_times = 3
; Number of seconds of wait after a failed copy, before retrying - default 30
basebackup_retry_sleep = 30
; Minimum number of required backups (redundancy) - default 0
minimum_redundancy = 3
; Global retention policy (REDUNDANCY or RECOVERY WINDOW) - default empty
retention_policy = RECOVERY WINDOW OF 4 WEEKS
; Recovery options (influences recovery.conf written by barman recover)
recovery_options = 'get-wal'
; Time frame that must contain the latest backup date.
; If the latest backup is older than the time frame, barman check
; command will report an error to the user.
; If empty, the latest backup is always considered valid.
; Syntax for this option is: "i (DAYS | WEEKS | MONTHS)" where i is an
; integer > 0 which identifies the number of days | weeks | months of
; validity of the latest backup for this check. Also known as 'smelly backup'.
last_backup_maximum_age = 1 WEEK
configuration_files_directory = /etc/barman.d
path_prefix = /usr/lib/postgresql/12/bin
server.conf：
[v2db]
description = "Backups from DB"
ssh_command = "ssh -q postgres@******"
conninfo = "********** "
streaming_conninfo = "************** "
streaming_archiver = on
slot_name = "backup_pgsql_masterbarman"
active = true
参数wal_compression是从PostgreSQL服务器配置中获取的。这意味着您已经在数据库服务器上配置了wal_compression=off。使用签入psql
show wal_compression;
您可以在上查看有关此参数的更多信息：https://postgresqlco.nf/doc/en/param/wal_compression/
不管怎样，酒吧服务员端的WAL压缩应该可以工作，因为你似乎已经正确配置了压缩。确保您已经在酒吧服务员服务器上安装了pigz所需的操作系统库。
附言：在流操作期间，您不会看到压缩的WAL大小。WAL日志将在完成流操作后进行压缩。但您可以检查WAL目录中已经压缩的WAL日志。
检查配置的wals_directory:的命令
barman show-server <server_name_here> | grep "wals_directory"