[20190509]rman備份的疑問5.txt--//別人跟我提到的rman備份問題,我開始以為是assm與mssm的問題,實際測試情況不是.--//開始備份時生成的備份集文件很大,以後會回縮(對方採用壓縮方式).我以前測試也遇到類似的情況,我重覆演示看看.1.環境:SYS@book> @ ver ...
[20190509]rman備份的疑問5.txt
--//別人跟我提到的rman備份問題,我開始以為是assm與mssm的問題,實際測試情況不是.
--//開始備份時生成的備份集文件很大,以後會回縮(對方採用壓縮方式).我以前測試也遇到類似的情況,我重覆演示看看.
1.環境:
SYS@book> @ ver1
PORT_STRING VERSION BANNER
------------------------------ -------------- --------------------------------------------------------------------------------
x86_64/Linux 2.4.xx 11.2.0.4.0 Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
SYS@book> show parameter filesystem
NAME TYPE VALUE
-------------------- ------ -----
filesystemio_options string NONE
--//測試不要使用非同步IO.主要跟蹤看到的非同步IO信息目前我看不懂!!
CREATE TABLESPACE T01 DATAFILE '/mnt/ramdisk/book/t01.dbf' SIZE 40M AUTOEXTEND OFF LOGGING ONLINE EXTENT MANAGEMENT LOCAL AUTOALLOCATE BLOCKSIZE 8K SEGMENT SPACE MANAGEMENT MANUAL;
CREATE TABLESPACE T02 DATAFILE '/mnt/ramdisk/book/t02.dbf' SIZE 40M AUTOEXTEND OFF LOGGING ONLINE EXTENT MANAGEMENT LOCAL AUTOALLOCATE BLOCKSIZE 8K SEGMENT SPACE MANAGEMENT AUTO;
--//註意建立的數據文件AUTOEXTEND OFF,一個mssm,一個assm.主要避免一個數據文件快滿時,oracle會自動提前擴展數據文件.
create table t01 tablespace t01 as select rownum id ,lpad('A',32,'A') name from dual connect by level<=7e5;
create table t02a tablespace t02 as select rownum id ,lpad('A',32,'A') name from dual connect by level<=1e5;
create table t02b tablespace t02 as select rownum id ,lpad('B',32,'B') name from dual connect by level<=1e5;
create table t02c tablespace t02 as select rownum id ,lpad('C',32,'C') name from dual connect by level<=1e5;
create table t02d tablespace t02 as select rownum id ,lpad('D',32,'D') name from dual connect by level<=1e5;
create table t02e tablespace t02 as select rownum id ,lpad('E',32,'E') name from dual connect by level<=1e5;
create table t02f tablespace t02 as select rownum id ,lpad('F',32,'F') name from dual connect by level<=1e5;
create table t02g tablespace t02 as select rownum id ,lpad('G',32,'G') name from dual connect by level<=1e5;
--//基本寫滿這個數據文件.
2.建立測試腳本:
RMAN> report schema ;
Report of database schema for database with db_unique_name BOOK
List of Permanent Datafiles
===========================
File Size(MB) Tablespace RB segs Datafile Name
---- -------- -------------------- ------- ------------------------
1 760 SYSTEM *** /mnt/ramdisk/book/system01.dbf
2 1150 SYSAUX *** /mnt/ramdisk/book/sysaux01.dbf
3 865 UNDOTBS1 *** /mnt/ramdisk/book/undotbs01.dbf
4 128 USERS *** /mnt/ramdisk/book/users01.dbf
5 346 EXAMPLE *** /mnt/ramdisk/book/example01.dbf
6 6 TEA *** /mnt/ramdisk/book/tea01.dbf
7 16 UNDOTBS1 *** /mnt/ramdisk/book/undotbs02.dbf
8 16 UNDOTBS1 *** /mnt/ramdisk/book/undotbs03.dbf
9 40 T01 *** /mnt/ramdisk/book/t01.dbf
10 40 T02 *** /mnt/ramdisk/book/t02.dbf
List of Temporary Files
=======================
File Size(MB) Tablespace Maxsize(MB) Tempfile Name
---- -------- -------------------- ----------- --------------------
1 414 TEMP 4096 /mnt/ramdisk/book/temp01.dbf
RMAN> CONFIGURE CONTROLFILE AUTOBACKUP OFF;
old RMAN configuration parameters:
CONFIGURE CONTROLFILE AUTOBACKUP ON;
new RMAN configuration parameters:
CONFIGURE CONTROLFILE AUTOBACKUP OFF;
new RMAN configuration parameters are successfully stored
--//測試前關閉控制文件自動備份,避免干擾.
RMAN> CONFIGURE CHANNEL 1 DEVICE TYPE DISK RATE 5M;
old RMAN configuration parameters:
CONFIGURE CHANNEL 1 DEVICE TYPE DISK RATE 10 M;
new RMAN configuration parameters:
CONFIGURE CHANNEL 1 DEVICE TYPE DISK RATE 5 M;
new RMAN configuration parameters are successfully stored
--//數據文件40M,40/5=8秒,監測15秒應該足夠了(我自己先測了1次).這樣備份慢一些,我監控可以看到信息.
$ cat tt.sh
#! /bin/bash
file=$1
>| /tmp/xx_${file}
>| /tmp/yy_${file}
strace -ftt -x -o /tmp/tt_${file}.txt rman target / <<< "backup as compressed backupset datafile "$file" format \"/home/oracle/backup/T_"${file}"_%U\" ;" &
seq 30 | xargs -I{} echo "ls -l /home/oracle/backup/T_${file}_*;sleep 0.5" | bash 2>/dev/null| ts.awk >> /tmp/xx_${file} 2>/dev/null &
seq 30 | xargs -I{} echo "stat -c '%s %b %B' /home/oracle/backup/T_${file}_*;sleep 0.5" | bash 2>/dev/null | ts.awk >> /tmp/yy_${file} 2>/dev/null &
wait
3.測試:
$ . tt.sh 9
Recovery Manager: Release 11.2.0.4.0 - Production on Thu May 9 09:25:27 2019
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: BOOK (DBID=1337401710)
RMAN>
Starting backup at 2019-05-09 09:25:30
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=156 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=170 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=184 device type=DISK
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00009 name=/mnt/ramdisk/book/t01.dbf
channel ORA_DISK_1: starting piece 1 at 2019-05-09 09:25:33
channel ORA_DISK_1: finished piece 1 at 2019-05-09 09:25:48
piece handle=/home/oracle/backup/T_9_12u13n4c_1_1 tag=TAG20190509T092532 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:15
channel ORA_DISK_1: throttle time: 0:00:06
Finished backup at 2019-05-09 09:25:48
RMAN>
Recovery Manager complete.
[1] Done strace -ftt -x -o /tmp/tt_${file}.txt rman target / <<< "backup as compressed backupset datafile "$file" format \"/home/oracle/backup/T_"${file}"_%U\" ;"
[2]- Done seq 30 | xargs -I{} echo "ls -l /home/oracle/backup/T_${file}_*;sleep 0.5" | bash 2> /dev/null | ts.awk >> /tmp/xx_${file} 2> /dev/null
[3]+ Done seq 30 | xargs -I{} echo "stat -c '%s %b %B' /home/oracle/backup/T_${file}_*;sleep 0.5" | bash 2> /dev/null | ts.awk >> /tmp/yy_${file} 2> /dev/null
$ uniq -c /tmp/xx_9
2 [2019-05-09 09:25:33] -rw-r----- 1 oracle oinstall 41975808 May 9 09:25 /home/oracle/backup/T_9_12u13n4c_1_1
2 [2019-05-09 09:25:34] -rw-r----- 1 oracle oinstall 41975808 May 9 09:25 /home/oracle/backup/T_9_12u13n4c_1_1
2 [2019-05-09 09:25:35] -rw-r----- 1 oracle oinstall 41975808 May 9 09:25 /home/oracle/backup/T_9_12u13n4c_1_1
2 [2019-05-09 09:25:36] -rw-r----- 1 oracle oinstall 41975808 May 9 09:25 /home/oracle/backup/T_9_12u13n4c_1_1
2 [2019-05-09 09:25:37] -rw-r----- 1 oracle oinstall 41975808 May 9 09:25 /home/oracle/backup/T_9_12u13n4c_1_1
2 [2019-05-09 09:25:38] -rw-r----- 1 oracle oinstall 41975808 May 9 09:25 /home/oracle/backup/T_9_12u13n4c_1_1
2 [2019-05-09 09:25:39] -rw-r----- 1 oracle oinstall 41975808 May 9 09:25 /home/oracle/backup/T_9_12u13n4c_1_1
2 [2019-05-09 09:25:40] -rw-r----- 1 oracle oinstall 2826240 May 9 09:25 /home/oracle/backup/T_9_12u13n4c_1_1
2 [2019-05-09 09:25:41] -rw-r----- 1 oracle oinstall 2826240 May 9 09:25 /home/oracle/backup/T_9_12u13n4c_1_1
1 [2019-05-09 09:25:42] -rw-r----- 1 oracle oinstall 2826240 May 9 09:25 /home/oracle/backup/T_9_12u13n4c_1_1
$ ls -l /mnt/ramdisk/book/t01.dbf
-rw-r----- 1 oracle oinstall 41951232 2019-05-09 10:25:02 /mnt/ramdisk/book/t01.dbf
--//41975808-41951232 = 24576
--//24576/8192 = 3 , 比數據文件多3個數據塊.
$ uniq -c /tmp/yy_9
2 [2019-05-09 09:25:33] 41975808 2072 512
2 [2019-05-09 09:25:34] 41975808 2072 512
2 [2019-05-09 09:25:35] 41975808 2072 512
2 [2019-05-09 09:25:36] 41975808 2072 512
1 [2019-05-09 09:25:37] 41975808 2072 512
1 [2019-05-09 09:25:37] 41975808 4120 512
2 [2019-05-09 09:25:38] 41975808 4120 512
2 [2019-05-09 09:25:39] 41975808 4120 512
2 [2019-05-09 09:25:40] 2826240 5528 512
2 [2019-05-09 09:25:41] 2826240 5528 512
1 [2019-05-09 09:25:42] 2826240 5528 512
--//可以發現開始備份文件大小41975808,而實際占2072塊(每塊512位元組),2072*512 = 1060864,實際占用1M上下,也就是備份開始建立的
--//文件像臨時表空間文件一樣,是稀疏文件.
--//你可以發現最後生成的文件才2826240,而實際占5528塊(單位512位元組).這也是對方看到的情況.
--//我開始以為是使用mssm的緣故,我改成assm也是一樣.也就是與這個無關.
$ . tt.sh 10
Recovery Manager: Release 11.2.0.4.0 - Production on Thu May 9 09:49:54 2019
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: BOOK (DBID=1337401710)
RMAN>
Starting backup at 2019-05-09 09:49:57
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=212 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=226 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=241 device type=DISK
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00010 name=/mnt/ramdisk/book/t02.dbf
channel ORA_DISK_1: starting piece 1 at 2019-05-09 09:49:59
channel ORA_DISK_1: finished piece 1 at 2019-05-09 09:50:15
piece handle=/home/oracle/backup/T_10_14u13oi7_1_1 tag=TAG20190509T094959 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:16
channel ORA_DISK_1: throttle time: 0:00:06
Finished backup at 2019-05-09 09:50:15
RMAN>
Recovery Manager complete.
[1] Done strace -ftt -x -o /tmp/tt_${file}.txt rman target / <<< "backup as compressed backupset datafile "$file" format \"/home/oracle/backup/T_"${file}"_%U\" ;"
[2]- Done seq 30 | xargs -I{} echo "ls -l /home/oracle/backup/T_${file}_*;sleep 0.5" | bash 2> /dev/null | ts.awk >> /tmp/xx_${file} 2> /dev/null
[3]+ Done seq 30 | xargs -I{} echo "stat -c '%s %b %B' /home/oracle/backup/T_${file}_*;sleep 0.5" | bash 2> /dev/null | ts.awk >> /tmp/yy_${file} 2> /dev/null
$ uniq -c /tmp/xx_10
2 [2019-05-09 09:50:00] -rw-r----- 1 oracle oinstall 41975808 May 9 09:50 /home/oracle/backup/T_10_14u13oi7_1_1
2 [2019-05-09 09:50:01] -rw-r----- 1 oracle oinstall 41975808 May 9 09:50 /home/oracle/backup/T_10_14u13oi7_1_1
2 [2019-05-09 09:50:02] -rw-r----- 1 oracle oinstall 41975808 May 9 09:50 /home/oracle/backup/T_10_14u13oi7_1_1
2 [2019-05-09 09:50:03] -rw-r----- 1 oracle oinstall 41975808 May 9 09:50 /home/oracle/backup/T_10_14u13oi7_1_1
2 [2019-05-09 09:50:04] -rw-r----- 1 oracle oinstall 41975808 May 9 09:50 /home/oracle/backup/T_10_14u13oi7_1_1
2 [2019-05-09 09:50:05] -rw-r----- 1 oracle oinstall 41975808 May 9 09:50 /home/oracle/backup/T_10_14u13oi7_1_1
2 [2019-05-09 09:50:06] -rw-r----- 1 oracle oinstall 41975808 May 9 09:50 /home/oracle/backup/T_10_14u13oi7_1_1
2 [2019-05-09 09:50:07] -rw-r----- 1 oracle oinstall 2867200 May 9 09:50 /home/oracle/backup/T_10_14u13oi7_1_1
2 [2019-05-09 09:50:08] -rw-r----- 1 oracle oinstall 2867200 May 9 09:50 /home/oracle/backup/T_10_14u13oi7_1_1
1 [2019-05-09 09:50:09] -rw-r----- 1 oracle oinstall 2867200 May 9 09:50 /home/oracle/backup/T_10_14u13oi7_1_1
$ uniq -c /tmp/yy_10
2 [2019-05-09 09:50:00] 41975808 2072 512
2 [2019-05-09 09:50:01] 41975808 2072 512
2 [2019-05-09 09:50:02] 41975808 2072 512
2 [2019-05-09 09:50:03] 41975808 2072 512
2 [2019-05-09 09:50:04] 41975808 2072 512
2 [2019-05-09 09:50:05] 41975808 4120 512
2 [2019-05-09 09:50:06] 41975808 4120 512
2 [2019-05-09 09:50:07] 2867200 5608 512
2 [2019-05-09 09:50:08] 2867200 5608 512
1 [2019-05-09 09:50:09] 2867200 5608 512
--//assm也是一樣.
4.繼續測試:
--//刪除幾個表看看.
SCOTT@book> drop table t02a purge ;
Table dropped.
SCOTT@book> drop table t02b purge ;
Table dropped.
SCOTT@book> drop table t02c purge ;
Table dropped.
--//重覆備份數據文件10.註意先刪除前面數據文件10的備份,主要我寫的監測腳本不是很好.使用模糊查詢.
RMAN> delete backupset 34;
using channel ORA_DISK_1
using channel ORA_DISK_2
using channel ORA_DISK_3
List of Backup Pieces
BP Key BS Key Pc# Cp# Status Device Type Piece Name
------- ------- --- --- ----------- ----------- ----------
34 34 1 1 AVAILABLE DISK /home/oracle/backup/T_10_14u13oi7_1_1
Do you really want to delete the above objects (enter YES or NO)? yes
deleted backup piece
backup piece handle=/home/oracle/backup/T_10_14u13oi7_1_1 RECID=34 STAMP=1007805000
Deleted 1 objects
--//重覆測試.
$ uniq -c /tmp/yy_10
2 [2019-05-09 10:11:24] 41975808 2072 512
2 [2019-05-09 10:11:25] 41975808 2072 512
2 [2019-05-09 10:11:26] 41975808 2072 512
2 [2019-05-09 10:11:27] 41975808 2072 512
2 [2019-05-09 10:11:28] 41975808 2072 512
2 [2019-05-09 10:11:29] 41975808 2072 512
2 [2019-05-09 10:11:30] 41975808 2072 512
2 [2019-05-09 10:11:31] 41975808 2072 512
1 [2019-05-09 10:11:32] 41975808 2072 512
1 [2019-05-09 10:11:32] 2097152 4104 512
1 [2019-05-09 10:11:33] 2097152 4104 512
--//看到的情況還是一樣.
5.再繼續測試:
--//重新建立表空間T02,以及對應表.打開AUTOEXTEND ON看看.
SCOTT@book> ALTER DATABASE DATAFILE '/mnt/ramdisk/book/t02.dbf' AUTOEXTEND ON NEXT 16M MAXSIZE UNLIMITED;
Database altered.
--//重覆測試,註意刪除前面的備份.
$ uniq -c /tmp/yy_10
2 [2019-05-09 10:22:41] 41975808 2072 512
2 [2019-05-09 10:22:42] 41975808 2072 512
2 [2019-05-09 10:22:43] 41975808 2072 512
2 [2019-05-09 10:22:44] 41975808 2072 512
1 [2019-05-09 10:22:45] 41975808 2072 512
1 [2019-05-09 10:22:45] 41975808 4120 512
2 [2019-05-09 10:22:46] 41975808 4120 512
2 [2019-05-09 10:22:47] 41975808 4120 512
2 [2019-05-09 10:22:48] 2859008 5592 512
2 [2019-05-09 10:22:49] 2859008 5592 512
1 [2019-05-09 10:22:50] 2859008 5592 512
--//看到的情況還是一樣.
SCOTT@book> ALTER DATABASE DATAFILE '/mnt/ramdisk/book/t02.dbf' RESIZE 100M;
Database altered.
--//重覆測試,註意刪除前面的備份.
$ uniq -c /tmp/yy_10
1 [2019-05-09 10:25:13] 1056768 2072 512
1 [2019-05-09 10:25:14] 1056768 2072 512
2 [2019-05-09 10:25:15] 1056768 2072 512
2 [2019-05-09 10:25:16] 1056768 2072 512
2 [2019-05-09 10:25:17] 1056768 2072 512
2 [2019-05-09 10:25:18] 1056768 2072 512
2 [2019-05-09 10:25:19] 2105344 4120 512
2 [2019-05-09 10:25:20] 2105344 4120 512
2 [2019-05-09 10:25:21] 2105344 4120 512
2 [2019-05-09 10:25:22] 2105344 4120 512
1 [2019-05-09 10:25:23] 2105344 4120 512
$ uniq -c /tmp/xx_10
1 [2019-05-09 10:25:13] -rw-r----- 1 oracle oinstall 1056768 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
1 [2019-05-09 10:25:14] -rw-r----- 1 oracle oinstall 1056768 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
2 [2019-05-09 10:25:15] -rw-r----- 1 oracle oinstall 1056768 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
2 [2019-05-09 10:25:16] -rw-r----- 1 oracle oinstall 1056768 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
2 [2019-05-09 10:25:17] -rw-r----- 1 oracle oinstall 1056768 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
2 [2019-05-09 10:25:18] -rw-r----- 1 oracle oinstall 1056768 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
2 [2019-05-09 10:25:19] -rw-r----- 1 oracle oinstall 2105344 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
2 [2019-05-09 10:25:20] -rw-r----- 1 oracle oinstall 2105344 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
2 [2019-05-09 10:25:21] -rw-r----- 1 oracle oinstall 2105344 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
2 [2019-05-09 10:25:22] -rw-r----- 1 oracle oinstall 2105344 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
1 [2019-05-09 10:25:23] -rw-r----- 1 oracle oinstall 2105344 May 9 10:25 /home/oracle/backup/T_10_1cu13qk9_1_1
--//這又看到另外的情況,當數據文件大於一定程度後,orcle備份方式生產的文件不再是接近數據文件大小.邊界在哪裡呢?
--//修改腳本延遲監測時間以及監測間隔.
$ cat tt.sh
#! /bin/bash
file=$1
>| /tmp/xx_${file}
>| /tmp/yy_${file}
strace -ftt -x -o /tmp/tt_${file}.txt rman target / <<< "backup as compressed backupset datafile "$file" format \"/home/oracle/backup/T_"${file}"_%U\" ;" &
seq 30 | xargs -I{} echo "ls -l /home/oracle/backup/T_${file}_*;sleep 1" | bash 2>/dev/null| ts.awk >> /tmp/xx_${file} 2>/dev/null &
seq 30 | xargs -I{} echo "stat -c '%s %b %B' /home/oracle/backup/T_${file}_*;sleep 1" | bash 2>/dev/null | ts.awk >> /tmp/yy_${file} 2>/dev/null &
wait
--//採用不斷嘗試的方法最終確定:
SCOTT@book> ALTER DATABASE DATAFILE '/mnt/ramdisk/book/t02.dbf' RESIZE 65512K;
Database altered.
SCOTT@book> select 64*1024-8*3 from dual ;
64*1024-8*3
-----------
65512
--//也就是64M-3*8K 就出現這個現象.
--//註:自己有點不轉彎,在測試63M,64M時,應該可以猜測應該是64M-3*8K.在這裡浪費許多時間...
--//只要數據文件再增加8K,這個現象就消失,不會開始建立的備份文件文件與數據文件接近,並且是稀疏文件.
$ . tt.sh 10
Recovery Manager: Release 11.2.0.4.0 - Production on Thu May 9 10:46:27 2019
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: BOOK (DBID=1337401710)
RMAN>
Starting backup at 2019-05-09 10:46:30
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=170 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=184 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=198 device type=DISK
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00010 name=/mnt/ramdisk/book/t02.dbf
channel ORA_DISK_1: starting piece 1 at 2019-05-09 10:46:33
channel ORA_DISK_1: finished piece 1 at 2019-05-09 10:46:48
piece handle=/home/oracle/backup/T_10_1ku13rs9_1_1 tag=TAG20190509T104632 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:15
channel ORA_DISK_1: throttle time: 0:00:12
Finished backup at 2019-05-09 10:46:48
RMAN>
Recovery Manager complete.
[1] Done strace -ftt -x -o /tmp/tt_${file}.txt rman target / <<< "backup as compressed backupset datafile "$file" format \"/home/oracle/backup/T_"${file}"_%U\" ;"
[2]- Done seq 30 | xargs -I{} echo "ls -l /home/oracle/backup/T_${file}_*;sleep 1" | bash 2> /dev/null | ts.awk >> /tmp/xx_${file} 2> /dev/null
[3]+ Done seq 30 | xargs -I{} echo "stat -c '%s %b %B' /home/oracle/backup/T_${file}_*;sleep 1" | bash 2> /dev/null | ts.awk >> /tmp/yy_${file} 2> /dev/null
$ uniq -c /tmp/xx_10
1 [2019-05-09 10:46:33] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:34] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:35] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:36] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:37] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:38] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:39] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:40] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:41] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:42] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:43] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:44] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:45] -rw-r----- 1 oracle oinstall 67117056 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:46] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:47] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:48] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:49] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:50] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:51] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:53] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:54] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:55] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:56] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
1 [2019-05-09 10:46:57] -rw-r----- 1 oracle oinstall 2859008 May 9 10:46 /home/oracle/backup/T_10_1ku13rs9_1_1
$ ls -l /mnt/ramdisk/book/t02.dbf
-rw-r----- 1 oracle oinstall 67092480 2019-05-09 10:46:33 /mnt/ramdisk/book/t02.dbf
--//數據文件大小是 65512+8 = 65520K(包括OS頭8k),65520*1024 = 67092480.
--//67117056 - 67092480 = 24576
--//24576/8192 = 3,也就是生成備份集文件大小是64M+8k= 64*1024*1024+8192 = 67117056
--//順便講一下我看了rman的壓縮備份文件,我發現一個特點,點陣圖區並不壓縮.
$ uniq -c /tmp/yy_10
1 [2019-05-09 10:46:33] 67117056 2072 512
1 [2019-05-09 10:46:34] 67117056 2072 512
1 [2019-05-09 10:46:35] 67117056 2072 512
1 [2019-05-09 10:46:36] 67117056 2072 512
1 [2019-05-09 10:46:37] 67117056 2072 512
1 [2019-05-09 10:46:38] 67117056 4120 512
1 [2019-05-09 10:46:39] 67117056 4120 512
1 [2019-05-09 10:46:40] 67117056 4120 512
1 [2019-05-09 10:46:41] 67117056 4120 512
1 [2019-05-09 10:46:42] 67117056 4120 512
1 [2019-05-09 10:46:43] 67117056 4120 512
1 [2019-05-09 10:46:44] 67117056 4120 512
1 [2019-05-09 10:46:45] 67117056 4120 512
1 [2019-05-09 10:46:46] 2859008 5592 512
1 [2019-05-09 10:46:47] 2859008 5592 512
1 [2019-05-09 10:46:48] 2859008 5592 512
1 [2019-05-09 10:46:49] 2859008 5592 512
1 [2019-05-09 10:46:50] 2859008 5592 512
1 [2019-05-09 10:46:51] 2859008 5592 512
1 [2019-05-09 10:46:52] 2859008 5592 512
1 [2019-05-09 10:46:53] 2859008 5592 512
1 [2019-05-09 10:46:54] 2859008 5592 512
1 [2019-05-09 10:46:55] 2859008 5592 512
1 [2019-05-09 10:46:56] 2859008 5592 512
--//感覺還與rman的output buffer有關,rman有4個輸出緩存,每個1M.
$ egrep "pwrite\(259|close\(259|pread\(261" /tmp/tt_10.txt | egrep -v '"\\x15\\xc2|\\x00\\xc2'
--//過濾egrep -v '"\\x15\\xc2|\\x00\\xc2'是控制文件.
36698 10:46:33.097624 close(259) = 0
36698 10:46:33.163305 pread(261, "\x00\xa2\x00\x00\x00\x00\xc0\xff\x00\x00\x00\x00\x00\x00\x00\x00\x9b\xe5\x00\x00\x00\x20\x00\x00\xfd\x1f\x00\x00\x7d\x7c\x7b\x7a"..., 8192, 0) = 8192
36698 10:46:33.163385 pread(261, "\x00\xa2\x00\x00\x00\x00\xc0\xff\x00\x00\x00\x00\x00\x00\x00\x00\x9b\xe5\x00\x00\x00\x20\x00\x00\xfd\x1f\x00\x00\x7d\x7c\x7b\x7a"..., 8192, 0) = 8192
36698 10:46:33.163637 pread(261, "\x0b\xa2\x00\x00\x01\x00\x80\x02\x00\x00\x00\x00\x00\x00\x01\x04\x46\xd2\x00\x00\x00\x00\x00\x00\x00\x04\x20\x0b\x6e\x21\xb7\x4f"..., 1040384, 8192) = 1040384
36698 10:46:33.164208 pread(261, "\x20\xa2\x00\x00\x80\x00\x80\x02\x39\x4a\x84\x7d\x03\x00\x04\x04\x7a\xe0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 1048576) = 1048576
36698 10:46:33.165452 pread(261, "\x20\xa2\x00\x00\x00\x01\x80\x02\x39\x4a\x84\x7d\x03\x00\x02\x04\x30\xe2\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 2097152) = 1048576
36698 10:46:33.166685 pread(261, "\x20\xa2\x00\x00\x80\x01\x80\x02\x39\x4a\x84\x7d\x03\x00\x02\x04\x32\xe2\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 3145728) = 1048576
36698 10:46:33.167927 pread(261, "\x20\xa2\x00\x00\x00\x02\x80\x02\x39\x4a\x84\x7d\x03\x00\x02\x04\x34\xe2\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 4194304) = 1048576
36698 10:46:33.169149 pread(261, "\x20\xa2\x00\x00\x80\x02\x80\x02\x39\x4a\x84\x7d\x03\x00\x02\x04\x36\xe2\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 5242880) = 1048576
36698 10:46:33.170374 pread(261, "\x20\xa2\x00\x00\x00\x03\x80\x02\x86\x4a\x84\x7d\x03\x00\x04\x04\x5e\x96\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 6291456) = 1048576
36698 10:46:33.171624 pread(261, "\x20\xa2\x00\x00\x80\x03\x80\x02\x86\x4a\x84\x7d\x03\x00\x02\x04\x94\x97\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 7340032) = 1048576
36698 10:46:33.172845 pread(261, "\x20\xa2\x00\x00\x00\x04\x80\x02\x86\x4a\x84\x7d\x03\x00\x02\x04\x96\x97\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 8388608) = 1048576
36698 10:46:33.174057 pread(261, "\x20\xa2\x00\x00\x80\x04\x80\x02\x86\x4a\x84\x7d\x03\x00\x02\x04\x90\x97\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 9437184) = 1048576
36698 10:46:33.175269 pread(261, "\x20\xa2\x00\x00\x00\x05\x80\x02\x86\x4a\x84\x7d\x03\x00\x02\x04\x92\x97\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 10485760) = 1048576
36698 10:46:33.176554 pread(261, "\x20\xa2\x00\x00\x80\x05\x80\x02\xba\x4a\x84\x7d\x03\x00\x04\x04\xaa\x97\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 11534336) = 1048576
36698 10:46:33.177782 pread(261, "\x20\xa2\x00\x00\x00\x06\x80\x02\xba\x4a\x84\x7d\x03\x00\x02\x04\xe0\x90\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 12582912) = 1048576
36698 10:46:33.178994 pread(261, "\x20\xa2\x00\x00\x80\x06\x80\x02\xba\x4a\x84\x7d\x03\x00\x02\x04\xe2\x90\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 13631488) = 1048576
36698 10:46:33.180217 pread(261, "\x20\xa2\x00\x00\x00\x07\x80\x02\xba\x4a\x84\x7d\x03\x00\x02\x04\xe4\x90\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 14680064) = 1048576
36698 10:46:33.181433 pread(261, "\x20\xa2\x00\x00\x80\x07\x80\x02\xba\x4a\x84\x7d\x03\x00\x02\x04\xe6\x90\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 15728640) = 1048576
36698 10:46:33.184438 pread(261, "\x20\xa2\x00\x00\x00\x08\x80\x02\xef\x4a\x84\x7d\x03\x00\x04\x04\xbd\x97\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 16777216) = 1048576
36698 10:46:33.185021 pwrite(259, "\x13\xa2\x00\x00\x01\x00\x00\x00\x05\x56\x84\x7d\x03\x00\x01\x04\xd3\x5e\x00\x00\x00\x04\x20\x0b\x00\x04\x20\x0b\x6e\x21\xb7\x4f"..., 1048576, 8192) = 1048576
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
36698 10:46:34.224895 pread(261, "\x20\xa2\x00\x00\x80\x08\x80\x02\xef\x4a\x84\x7d\x03\x00\x02\x04\x77\x9d\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 17825792) = 1048576
36698 10:46:34.260169 pread(261, "\x20\xa2\x00\x00\x00\x09\x80\x02\xef\x4a\x84\x7d\x03\x00\x02\x04\x75\x9d\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 18874368) = 1048576
36698 10:46:34.295845 pread(261, "\x20\xa2\x00\x00\x80\x09\x80\x02\xef\x4a\x84\x7d\x03\x00\x02\x04\x73\x9d\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 19922944) = 1048576
36698 10:46:34.331109 pread(261, "\x20\xa2\x00\x00\x00\x0a\x80\x02\xef\x4a\x84\x7d\x03\x00\x02\x04\x71\x9d\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 20971520) = 1048576
36698 10:46:34.332389 pread(261, "\x20\xa2\x00\x00\x80\x0a\x80\x02\x23\x4b\x84\x7d\x03\x00\x04\x04\x22\xe0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 22020096) = 1048576
36698 10:46:35.368528 pread(261, "\x20\xa2\x00\x00\x00\x0b\x80\x02\x23\x4b\x84\x7d\x03\x00\x02\x04\x68\xe8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 23068672) = 1048576
36698 10:46:35.404228 pread(261, "\x20\xa2\x00\x00\x80\x0b\x80\x02\x23\x4b\x84\x7d\x03\x00\x02\x04\x6a\xe8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 24117248) = 1048576
36698 10:46:35.439582 pread(261, "\x20\xa2\x00\x00\x00\x0c\x80\x02\x23\x4b\x84\x7d\x03\x00\x02\x04\x6c\xe8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 25165824) = 1048576
36698 10:46:35.474894 pread(261, "\x20\xa2\x00\x00\x80\x0c\x80\x02\x23\x4b\x84\x7d\x03\x00\x02\x04\x6e\xe8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 26214400) = 1048576
36698 10:46:35.510190 pread(261, "\x20\xa2\x00\x00\x00\x0d\x80\x02\x58\x4b\x84\x7d\x03\x00\x04\x04\xac\x97\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 27262976) = 1048576
36698 10:46:36.546546 pread(261, "\x20\xa2\x00\x00\x80\x0d\x80\x02\x58\x4b\x84\x7d\x03\x00\x02\x04\x66\x98\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 28311552) = 1048576
36698 10:46:36.581819 pread(261, "\x20\xa2\x00\x00\x00\x0e\x80\x02\x58\x4b\x84\x7d\x03\x00\x02\x04\x64\x98\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 29360128) = 1048576
36698 10:46:36.617296 pread(261, "\x20\xa2\x00\x00\x80\x0e\x80\x02\x58\x4b\x84\x7d\x03\x00\x02\x04\x62\x98\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 30408704) = 1048576
36698 10:46:36.646622 pread(261, "\x20\xa2\x00\x00\x00\x0f\x80\x02\x58\x4b\x84\x7d\x03\x00\x02\x04\x60\x98\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 31457280) = 1048576
36698 10:46:36.663066 pread(261, "\x20\xa2\x00\x00\x80\x0f\x80\x02\x8f\x4b\x84\x7d\x03\x00\x04\x04\x55\x96\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 32505856) = 1048576
36698 10:46:37.698958 pread(261, "\x20\xa2\x00\x00\x00\x10\x80\x02\x8f\x4b\x84\x7d\x03\x00\x02\x04\x1f\x9b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 33554432) = 1048576
36698 10:46:37.734314 pread(261, "\x20\xa2\x00\x00\x80\x10\x80\x02\x8f\x4b\x84\x7d\x03\x00\x02\x04\x1d\x9b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 34603008) = 1048576
36698 10:46:37.770135 pread(261, "\x20\xa2\x00\x00\x00\x11\x80\x02\x8f\x4b\x84\x7d\x03\x00\x02\x04\x1b\x9b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 35651584) = 1048576
36698 10:46:37.805641 pread(261, "\x20\xa2\x00\x00\x80\x11\x80\x02\x8f\x4b\x84\x7d\x03\x00\x02\x04\x19\x9b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576, 36700160) = 1048576
36698 10:46:37.841105 pread(261, "\x00\xa2\x00\x00\xf8\x1f\x80\x02\x00\x00\x00\x00\x00\x00\x01\x05\x78\xba\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 49152, 67043328) = 49152
36698 10:46:38.877862 pwrite(259, "\x38\xa2\x00\x00\x81\x00\x40\x00\x05\x56\x84\x7d\x03\x00\x01\x04\xd7\x67\x00\x00\x4b\x47\x43\x80\x01\x48\x44\x52\x4a\x31\x20\xa2"..., 1048576, 1056768) = 1048576
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
36698 10:46:46.253197 pwrite(259, "\x38\xa2\x00\x00\x81\x00\x40\x00\x05\x56\x84\x7d\x03\x00\x01\x04\x26\xf1\x00\x00\x85\x61\x58\x56\x15\x85\x61\x58\x56\x15\x85\x61"..., 753664, 2105344) = 753664
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
36698 10:46:46.257606 close(259) = 0
36685 10:46:48.294566 close(259) = 0
36685 10:46:48.338566 close(259) = 0
36685 10:46:48.345322 close(259) = 0
36685 10:46:48.459072 pread(261, "\x0b\xa2\x00\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x00\x01\x04\xcd\xf4\x00\x00\x00\x00\x00\x00\x00\x04\x20\x0b\x6e\x21\xb7\x4f"..., 8192, 8192) = 8192
36685 10:46:48.607071 close(259) = 0
--//註意看下劃寫的寫入時間.與前面stat的輸出對比blocks的變換.
--//2072*512 = 1060864,參考http://blog.itpub.net/267265/viewspace-2641011/=>[20190411]linux stat 命令疑問.txt
--//實際上大小還有減去4096(這塊是間接塊). 1060864-4096 = 1056768,
--//文件大小是1048576+8192 = 1056768,註意8192是偏移量是備份集的OS文件頭.
--//(4120-2072)*512 = 1048576
--//(5592 - 4120)*512 = 753664
--//寫入量與stat的輸出監測一致.
--//可以猜測rman壓縮備份的大致步驟:
--//input buffer => compress => output buffer => write file.輸出緩存到1M後寫入備份文件.
--//不大可能如下:
--//input buffer => output buffer => compress => write file.因為這樣每次的寫入量大小不一致.當然這個是我的猜測.
6.bbed觀察備份文件:
BBED> info
File# Name Size(blks)
----- ---- ----------
9 /mnt/ramdisk/book/t02.dbf 0
10 /mnt/ramdisk/book/t02.dbf 0
100 /home/oracle/backup/T_10_1ku13rs9_1_1 0
--//發現點陣圖區並不壓縮.
$ seq 1 349 | xargs -I{} echo "dump /v dba 100,{} count 4 offset 0" | rlbbed | grep a20000 | uniq -c | cut -c1-20
1 13a20000
1 14a20000
1 1da20000
125 1ea20000
219 38a20000
1 37a20000
$ seq 129 | xargs -I{} echo "dump /v dba 10,{} count 4 offset 0" | rlbbed | grep a20000 | uniq -c | cut -c1-20
1 0ba20000
1 1da20000
125 1ea20000
1 20a20000
1 21a20000
--//可以發現點陣圖區開始信息都沒有變.開頭還是0x1ea20000,而且備份文件與數據文件存在1個塊的偏移.備份集文件點陣圖區前面正好是3*8K.(我測
--//試備份文件集僅僅1個數據文件的情況,其它我沒有測試)
--//備份壓縮開始數據塊頭都是0x38a20000,結尾是0x37a20000.
7.附上增加8K的測試情況:
SCOTT@book> ALTER DATABASE DATAFILE '/mnt/ramdisk/book/t02.dbf' RESIZE 65520K;
Database altered.
$ . tt.sh 10
Recovery Manager: Release 11.2.0.4.0 - Production on Thu May 9 11:38:45 2019
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: BOOK (DBID=1337401710)
RMAN>
Starting backup at 2019-05-09 11:38:47
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=170 device type=DISK
allocated channel: ORA_DISK_2
channel ORA_DISK_2: SID=184 device type=DISK
allocated channel: ORA_DISK_3
channel ORA_DISK_3: SID=198 device type=DISK
channel ORA_DISK_1: starting compressed full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00010 name=/mnt/ramdisk/book/t02.dbf
channel ORA_DISK_1: starting piece 1 at 2019-05-09 11:38:50
channel ORA_DISK_1: finished piece 1 at 2019-05-09 11:39:05
piece handle=/home/oracle/backup/T_10_1lu13uua_1_1 tag=TAG20190509T113850 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:15
channel ORA_DISK_1: throttle time: 0:00:12
Finished backup at 2019-05-09 11:39:05
RMAN>
Recovery Manager complete.
[1] Done strace -ftt -x -o /tmp/tt_${file}.txt rman target / <<< "backup as compressed backupset datafile "$file" format \"/home/oracle/backup/T_"${file}"_%U\" ;"
[2]- Done&