加上 compressed level 2就行，数据中如果存在大字段，非结构化数据，压缩不会有太明显的区别
/dmdbms/bin/dmrman CTLSTMT="BACKUP DATABASE '/dmdata/DAMENG/dm.ini' FULL BACKUPSET '/dmdata/DAMENG/bak/BACKUP_FILE' compressed level 2 parallel 4"

在备份语句中加上 compress level 参数

BACKUP DATABASE '/home/dmdba/dmdbms/data/DAMENG/dm.ini' FULL BACKUPSET '/home/dmdba/bak/0328' compressed level 5 parallel 4

1、使用高级压缩选项

./dmrman 
BACKUP DATABASE '/home/dmdba/dmdbms/data/DAMENG/dm.ini'  
FULL COMPRESSED 
BACKUPSET '/home/dmdba/bak/0328' 
compressed level 5 parallel 4;  # 压缩级别1-9，建议5-7平衡性能与压缩率 

600G数据可压缩至180-240G（压缩率约30-40%）

2、增量备份，减少备份量

# 首次全量备份 
BACKUP DATABASE '/path/to/dm.ini'  FULL BACKUPSET '/bak/full_20250401';
 
# 后续增量备份 
BACKUP DATABASE '/path/to/dm.ini'  
INCREMENT WITH BACKUPDIR '/bak/full_20250401' 
BACKUPSET '/bak/incr_20250402';