DB2歸檔日志的相關(guān)信息保存在恢復(fù)歷史文件中，可以通過 db2 list history 命令查看。
db2inst1@suse-db:~> db2 list history archive log all for ggyy
List History File for ggyy
Number of matching file entries = 6
Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log Backup ID
-- --- ------------------ ---- --- ------------ ------------ --------------
X D 20100103235553 1 D S0000038.LOG C0000007
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Comment:
Start Time: 20100103235553
End Time: 20100103235553
Status: A
----------------------------------------------------------------------------
EID: 80 Location: /data/palog/db2inst1/GGYY/NODE0000/C0000007/S0000038.LOG
Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log Backup ID
-- --- ------------------ ---- --- ------------ ------------ --------------
X D 20100103235553 N S0000038.LOG
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Comment: ARCHIVE LOG
Start Time: 20100103235553
End Time: 20100103235553
Status: A
----------------------------------------------------------------------------
EID: 81
Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log Backup ID
-- --- ------------------ ---- --- ------------ ------------ --------------
X D 20100103235608 1 D S0000039.LOG C0000007
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Comment:
Start Time: 20100103235608
End Time: 20100103235608
Status: A
----------------------------------------------------------------------------
EID: 82 Location: /data/palog/db2inst1/GGYY/NODE0000/C0000007/S0000039.LOG
......
清除這些信息，需要使用 db2 prune history 命令。該命令會清除指定時間戳及之前的所有條目（不只是歸檔日志的）。默認(rèn)情況下，系統(tǒng)不會清除最近一次數(shù)據(jù)庫全備之后的歸檔日志信息。
db2inst1@suse-db:~> db2 prune history 20100103235553
SQL1024N A database connection does not exist. SQLSTATE=00000
db2inst1@suse-db:~> db2 connect to ggyy
Database Connection Information
Database server = DB2/LINUX 9.7.0
SQL authorization ID = DB2INST1
Local database alias = GGYY
db2inst1@suse-db:~> db2 prune history 20100103235553
DB20000I The PRUNE command completed successfully.
db2inst1@suse-db:~> db2 list history archive log all for ggyy | head -20
List History File for ggyy
Number of matching file entries = 6
Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log Backup ID
-- --- ------------------ ---- --- ------------ ------------ --------------
X D 20100103235553 1 D S0000038.LOG C0000007
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Comment:
Start Time: 20100103235553
End Time: 20100103235553
Status: A
----------------------------------------------------------------------------
EID: 80 Location: /data/palog/db2inst1/GGYY/NODE0000/C0000007/S0000038.LOG
db2inst1@suse-db:~> db2 list history backup all for ggyy
List History File for ggyy
Number of matching file entries = 0
對數(shù)據(jù)庫進行一次全備，再次嘗試清除：
db2inst1@suse-db:~> db2 backup db ggyy online to /data/backup
Backup successful. The timestamp for this backup image is : 20100104004121
db2inst1@suse-db:~> db2 connect to ggyy
Database Connection Information
Database server = DB2/LINUX 9.7.0
SQL authorization ID = DB2INST1
Local database alias = GGYY
db2inst1@suse-db:~> db2 prune history 20100103235553
DB20000I The PRUNE command completed successfully.
db2inst1@suse-db:~> db2 list history archive log all for ggyy | head -20
List History File for ggyy
Number of matching file entries = 5
Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log Backup ID
-- --- ------------------ ---- --- ------------ ------------ --------------
X D 20100103235608 1 D S0000039.LOG C0000007
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Comment:
Start Time: 20100103235608
End Time: 20100103235608
Status: A
----------------------------------------------------------------------------
EID: 82 Location: /data/palog/db2inst1/GGYY/NODE0000/C0000007/S0000039.LOG
通過使用 and delete 參數(shù)，可以在清理條目的同時刪除對應(yīng)的歸檔日志文件。
db2inst1@suse-db:~> ls -l /data/palog/db2inst1/GGYY/NODE0000/C0000007
total 48
-rw-r----- 1 db2inst1 db2iadm1 12288 2010-01-03 23:55 S0000038.LOG
-rw-r----- 1 db2inst1 db2iadm1 12288 2010-01-03 23:56 S0000039.LOG
-rw-r----- 1 db2inst1 db2iadm1 12288 2010-01-03 23:56 S0000040.LOG
-rw-r----- 1 db2inst1 db2iadm1 12288 2010-01-04 00:41 S0000041.LOG
db2inst1@suse-db:~> db2 prune history 20100103235608 and delete
DB20000I The PRUNE command completed successfully.
db2inst1@suse-db:~> db2 list history archive log all for ggyy | head -20
List History File for ggyy
Number of matching file entries = 3
Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log Backup ID
-- --- ------------------ ---- --- ------------ ------------ --------------
X D 20100103235618 1 D S0000040.LOG C0000007
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Comment:
Start Time: 20100103235618
End Time: 20100103235618
Status: A
----------------------------------------------------------------------------
EID: 84 Location: /data/palog/db2inst1/GGYY/NODE0000/C0000007/S0000040.LOG
db2inst1@suse-db:~> ls -l /data/palog/db2inst1/GGYY/NODE0000/C0000007
total 36
-rw-r----- 1 db2inst1 db2iadm1 12288 2010-01-03 23:55 S0000038.LOG
-rw-r----- 1 db2inst1 db2iadm1 12288 2010-01-03 23:56 S0000040.LOG
-rw-r----- 1 db2inst1 db2iadm1 12288 2010-01-04 00:41 S0000041.LOG
可以看到，歸檔日志文件S0000039.LOG已被刪除，但S0000038.LOG還存在，因為之前已經(jīng)清除了S0000038.LOG的相關(guān)條目。
嘗試同時清除S0000040.LOG和S0000041.LOG：
db2inst1@suse-db:~> db2 list history archive log all for ggyy | tail -15
Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log Backup ID
-- --- ------------------ ---- --- ------------ ------------ --------------
X D 20100104004127 1 D S0000041.LOG C0000007
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Comment:
Start Time: 20100104004127
End Time: 20100104004128
Status: A
----------------------------------------------------------------------------
EID: 86 Location: /data/palog/db2inst1/GGYY/NODE0000/C0000007/S0000041.LOG
db2inst1@suse-db:~> db2 prune history 20100104004127 and delete
DB20000I The PRUNE command completed successfully.
db2inst1@suse-db:~> db2 list history archive log all for ggyy | head -20
List History File for ggyy
Number of matching file entries = 1
Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log Backup ID
-- --- ------------------ ---- --- ------------ ------------ --------------
X D 20100104004127 1 D S0000041.LOG C0000007
----------------------------------------------------------------------------
----------------------------------------------------------------------------
Comment:
Start Time: 20100104004127
End Time: 20100104004128
Status: A
----------------------------------------------------------------------------
EID: 86 Location: /data/palog/db2inst1/GGYY/NODE0000/C0000007/S0000041.LOG
db2inst1@suse-db:~> ls -l /data/palog/db2inst1/GGYY/NODE0000/C0000007/
total 24
-rw-r----- 1 db2inst1 db2iadm1 12288 2010-01-03 23:55 S0000038.LOG
-rw-r----- 1 db2inst1 db2iadm1 12288 2010-01-04 00:41 S0000041.LOG
S0000041.LOG依然存在，因為它是全備之后生成的。如果想要強制清除，可以使用 with force option 參數(shù)。
db2inst1@suse-db:~> db2 prune history 20100104004127 with force option and delete
DB20000I The PRUNE command completed successfully.
db2inst1@suse-db:~> db2 list history archive log all for ggyy | head -20
List History File for ggyy
Number of matching file entries = 0
db2inst1@suse-db:~> ls -l /data/palog/db2inst1/GGYY/NODE0000/C0000007/
total 12
-rw-r----- 1 db2inst1 db2iadm1 12288 2010-01-03 23:55 S0000038.LOG
注意，這里連帶著將數(shù)據(jù)庫全備的條目也刪除了，但備份文件還在：
db2inst1@suse-db:/data/backup> db2 list history backup all for ggyy
List History File for ggyy
Number of matching file entries = 0
db2inst1@suse-db:/data/backup> ls -l /data/backup
total 99994
-rw------- 1 db2inst1 db2iadm1 102293504 2010-01-04 00:41 GGYY.0.db2inst1.NODE0000.CATN0000.20100104004121.001
此外，使用 db2 prune logfile 命令可以清除活動日志目錄下的在線歸檔日志文件，但對離線歸檔日志文件無效，這里不再贅述。