通过本文的备份恢复实验，我们可以深入了解onbar的使用方法和原理，包括如何进行完整备份、增量备份以及如何利用备份文件进行完全恢复与基于时间点的恢复。
1. 环境准备
1.1 配置存储管理器PSM的共享库
SinoDB 内置了一个存储管理器PSM，该存储管理器的接口库位置为$INFORMIXSERVER/lib/libbsapsm.so
- 查看接口库
[informix@vm84145 ~]$ cd $INFORMIXSERVER/lib
[informix@vm84145 lib]$ pwd
/home/informix/sinodb/lib
[informix@vm84145 lib]$ ll |grep libbsapsm.so
-r-xr-xr-x 1 informix informix 1927078 Aug 16 2017 libbsapsm.so
[informix@vm84145 lib]$
- 使用onbar时，需要做一些简单的配置，配置参数如下：
| 参数 | 说明 |
|---|---|
| BAR_BSALIB_PATH | 指定不同存储管理器的共享库(XBSA) |
| BAR_MAX_BACKUP | 定义并行程度，确定要并发运行的备份和恢复进程数 |
| LTAPEDEV | 指定逻辑日志备份目录 |
- 配置参数
[informix@vm84145 ~]$ onstat -c |grep BAR_BSALIB_PATH |grep -v '#'
BAR_BSALIB_PATH
[informix@vm84145 ~]$ onmode -wf BAR_BSALIB_PATH=/home/informix/sinodb/lib/libbsapsm.so
Value of BAR_BSALIB_PATH has been changed to /home/informix/sinodb/lib/libbsapsm.so.
[informix@vm84145 ~]$ onstat -c |grep BAR_BSALIB_PATH |grep -v '#'
BAR_BSALIB_PATH /home/informix/sinodb/lib/libbsapsm.so
[informix@vm84145 ~]$ onmode -wf LTAPEDEV=/home/informix/backups
Value of LTAPEDEV has been changed to /home/informix/backups.
[informix@vm84145 ~]$ onstat -c |grep LTAPEDEV |grep -v '#'
LTAPEDEV /home/informix/backups
[informix@vm84145 ~]$
说明：LTAPEDEV是ontape中的一个参数，在使用onbar时，该参数不能为/dev/null。我们可以临时为参数设置一个目录，实际备份时，逻辑日志并不保存在该目录中。
查看PSM设备情况
- 语法：
onpsm -D list
- 操作演示
[informix@vm84145 psmpool]$ onpsm -D list
SinoDB Primary Storage Manager Device List
Type Prio Block/Size (MB) Pool Name Device Name
FILE LOW --/-- DBSPOOL /home/informix/sinodb/backupsFILE LOW --/-- LOGPOOL /home/informix/sinodb/backups
[informix@vm84145 etc]$
配置PSM设备
我们不使用默认的PSM设备，使用下面的方法，添加一个自己的设备，并将原来的设备删除。
- 操作演示
[informix@vm84145 psmpool]$ onpsm -D list
SinoDB Primary Storage Manager Device ListType Prio Block/Size (MB) Pool Name Device Name
FILE LOW --/-- DBSPOOL /home/informix/sinodb/backupsFILE LOW --/-- LOGPOOL /home/informix/sinodb/backups
[informix@vm84145 psmpool]$mkdir -p /home/informix/psmpool/dbspool
[informix@vm84145 psmpool]$mkdir -p /home/informix/psmpool/logpool
[informix@vm84145 psmpool]$ onpsm -D add /home/informix/psmpool/dbspool -g DBSPOOL -p HIGHEST -t FILE
[informix@vm84145 psmpool]$ onpsm -D add /home/informix/psmpool/logpool -g LOGPOOL -p HIGHEST -t FILE
[informix@vm84145 psmpool]$ onpsm -D listSinoDB Primary Storage Manager Device List
Type Prio Block/Size (MB) Pool Name Device Name
FILE LOW --/-- DBSPOOL /home/informix/sinodb/backups
FILE HIGHEST --/-- DBSPOOL /home/informix/psmpool/dbspoolFILE LOW --/-- LOGPOOL /home/informix/sinodb/backups
FILE HIGHEST --/-- LOGPOOL /home/informix/psmpool/logpool[informix@vm84145 psmpool]$ onpsm -D del /home/informix/sinodb/backups -d
Delete the device from ALL pools and DELETE ALL backup objects stored in
FILE devices? (y/n) y
[informix@vm84145 psmpool]$ onpsm -D listSinoDB Primary Storage Manager Device List
Type Prio Block/Size (MB) Pool Name Device Name
FILE HIGHEST --/-- DBSPOOL /home/informix/psmpool/dbspoolFILE HIGHEST --/-- LOGPOOL /home/informix/psmpool/logpool
[informix@vm84145 psmpool]$ ^C
[informix@vm84145 psmpool]$ ll /home/informix/psmpool/dbspool
total 0
[informix@vm84145 psmpool]$ ll /home/informix/psmpool/logpool
total 0
[informix@vm84145 psmpool]$
2. 备份与恢复实验
业务场景说明：
(1) 数据空间文件被删除时的数据完全恢复
(2) 表删除后基于时间点的不完全恢复
image660×572 15.8 KB
步骤1： 创建数据库和表(t1)
- 操作演示
[informix@vm84145 ~]$ dbaccess sysmaster -
Database selected.
> create database psmdb in datadbs1 with log;
Database closed.
Database created.
> create table t_dept(f_deptid int, f_deptname varchar(20));
Table created.
> create table t_employee(f_employeeid int, f_deptid int, f_employeename varchar(20));
Table created.
> info tables;
Table name
t_dept t_employee
>
步骤2：L0备份前的数据准备
t_dept新增3条数据(t2)
- 语法
insert into t_dept values(1, 'dept_1');
insert into t_dept values(2, 'dept_2');
insert into t_dept values(3, 'dept_3');
- 查询结果
> select * from t_dept;
f_deptid f_deptname
1 dept_1
2 dept_2
3 dept_33 row(s) retrieved.
> !date +'%F %T'
2022-03-07 10:39:52
>
t_employee新增5条数据(t3)
- 语法
insert into t_employee values(1, 1, 'employee_01');
insert into t_employee values(2, 1, 'employee_02');
insert into t_employee values(3, 2, 'employee_03');
insert into t_employee values(4, 2, 'employee_04');
insert into t_employee values(5, 3, 'employee_05');
- 查询结果
> select * from t_employee;
f_employeeid f_deptid f_employeename1 1 employee_01
2 1 employee_02
3 2 employee_03
4 2 employee_04
5 3 employee_055 row(s) retrieved.
> !date +'%F %T'
2022-03-07 10:41:03
>
步骤3： 系统进行L0备份(t4)
查看当前逻辑日志文件编号为16
[informix@vm84145 ~]$ onstat -l
Sinoregal SinoDB Dynamic Server Version 12.10.FC8 -- On-Line -- Up 5 days 17:42:00 -- 2374324 Kbytes
Physical Logging
Buffer bufused bufsize numpages numwrits pages/io
P-1 0 1024 57951 927 62.51
phybegin physize phypos phyused %used
3:53 1023945 142057 13 0.00Logical Logging
Buffer bufused bufsize numrecs numpages numwrits recs/pages pages/io
L-3 0 512 422146 50692 39539 8.3 1.3
Subsystem numrecs Log Space used
OLDRSAM 421482 44029124
HA 629 27676
DDL 35 12180address number flags uniqid begin size used %used
475dffa8 7 F------ 0 2:53 102390 0 0.00
475fbf88 8 A------ 0 2:102443 102390 0 0.00
4886fd90 9 A------ 0 2:204833 102390 0 0.00
4886fdf8 10 A------ 0 2:307223 102390 0 0.00
4886fe60 11 U-B---- 11 2:409613 102390 51 0.05
4886fec8 12 U-B---- 12 2:512003 102390 10 0.01
4886ff30 13 U------ 13 2:614393 102390 40589 39.64
4886ff98 14 U------ 14 2:716783 102390 8 0.01
473abf68 15 U------ 15 2:819173 102390 50582 49.40
47481f40 16 U---C-L 16 2:921563 102390 18 0.02
10 active, 10 total[informix@vm84145 ~]$
查看实例的服务器编号为0
[informix@vm84145 ~]$ onstat -g cfg |grep SERVERNUM
SERVERNUM 0
[informix@vm84145 ~]$
执行L0备份
- 语法
onbar -b -L 0
- 操作演示
[informix@vm84145 ~]$ onbar -b -L 0
[informix@vm84145 ~]$ onpsm -O listSinoDB Primary Storage Manager Object List
Object ID Date Created Size (MB) Logical path (name.version)
1 2022-03-07 11:22:14 24.1 /sinodb/rootdbs/0/sinodb.1
2 2022-03-07 11:22:14 0.1 /sinodb/plogdbs/0/sinodb.1
3 2022-03-07 11:22:14 0.1 /sinodb/llogdbs/0/sinodb.1
4 2022-03-07 11:22:14 9.4 /sinodb/datadbs1/0/sinodb.1
5 2022-03-07 11:22:14 0.1 /sinodb/sbdbs1/0/sinodb.1
6 2022-03-07 11:22:14 0.1 /sinodb/datadbs4/0/sinodb.1
7 2022-03-07 11:22:14 1.0 /sinodb/bindbs1/0/sinodb.1
8 2022-03-07 11:22:15 0.1 /sinodb/datadbs3/0/sinodb.1
9 2022-03-07 11:22:15 0.1 /sinodb/datadbs2/0/sinodb.1
10 2022-03-07 11:22:15 0.1 /sinodb/datadbs5/0/sinodb.1
11 2022-03-07 11:22:15 79.3 /sinodb/0/13/sinodb.1
12 2022-03-07 11:22:16 0.0 /sinodb/0/14/sinodb.1
13 2022-03-07 11:22:16 98.8 /sinodb/0/15/sinodb.1
14 2022-03-07 11:22:16 0.2 /sinodb/0/16/sinodb.1
15 2022-03-07 11:22:16 0.0 /sinodb/critical_files/ixbar/sinodb.1
16 2022-03-07 11:22:16 0.0 /sinodb/critical_files/oncfg/sinodb.1
17 2022-03-07 11:22:16 0.1 /sinodb/critical_files/onconfig/sinodb.1
18 2022-03-07 11:22:16 0.0 /sinodb/critical_files/sqlhosts/sinodb.1
[informix@vm84145 ~]$
可以看到，L0备份了rootdbs，plogdbs，llogdbs，datadbs，ixbar，oncfg，onconfig，sqlhosts。另外还有一个目录/sinodb/0/16/sinodb.1，其中的0为实例的服务器编号，16为当前逻辑日志的唯一编号（uniqid）。
步骤4：L1备份前的数据准备
t_employee新增5条数据(t5)
- 语法
insert into t_employee values(11, 1, 'employee_11');
insert into t_employee values(12, 1, 'employee_12');
insert into t_employee values(13, 2, 'employee_13');
insert into t_employee values(14, 2, 'employee_14');
insert into t_employee values(15, 3, 'employee_15');
- 查询结果
> select * from t_employee;
f_employeeid f_deptid f_employeename1 1 employee_01
2 1 employee_02
3 2 employee_03
4 2 employee_04
5 3 employee_05
11 1 employee_11
12 1 employee_12
13 2 employee_13
14 2 employee_14
15 3 employee_1510 row(s) retrieved.
> !date +'%F %T'
2022-03-07 14:27:27
>
步骤5：系统进行L1备份(t6)
- 语法
onbar -b -L 1
- 操作演示
[informix@vm84145 ~]$ onbar -b -L 1
[informix@vm84145 ~]$ onpsm -O listSinoDB Primary Storage Manager Object List
Object ID Date Created Size (MB) Logical path (name.version)
1 2022-03-07 11:22:14 24.1 /sinodb/rootdbs/0/sinodb.1
2 2022-03-07 11:22:14 0.1 /sinodb/plogdbs/0/sinodb.1
3 2022-03-07 11:22:14 0.1 /sinodb/llogdbs/0/sinodb.1
4 2022-03-07 11:22:14 9.4 /sinodb/datadbs1/0/sinodb.1
5 2022-03-07 11:22:14 0.1 /sinodb/sbdbs1/0/sinodb.1
6 2022-03-07 11:22:14 0.1 /sinodb/datadbs4/0/sinodb.1
7 2022-03-07 11:22:14 1.0 /sinodb/bindbs1/0/sinodb.1
8 2022-03-07 11:22:15 0.1 /sinodb/datadbs3/0/sinodb.1
9 2022-03-07 11:22:15 0.1 /sinodb/datadbs2/0/sinodb.1
10 2022-03-07 11:22:15 0.1 /sinodb/datadbs5/0/sinodb.1
11 2022-03-07 11:22:15 79.3 /sinodb/0/13/sinodb.1
12 2022-03-07 11:22:16 0.0 /sinodb/0/14/sinodb.1
13 2022-03-07 11:22:16 98.8 /sinodb/0/15/sinodb.1
14 2022-03-07 11:22:16 0.2 /sinodb/0/16/sinodb.1
15 2022-03-07 11:22:16 0.0 /sinodb/critical_files/ixbar/sinodb.1
16 2022-03-07 11:22:16 0.0 /sinodb/critical_files/oncfg/sinodb.1
17 2022-03-07 11:22:16 0.1 /sinodb/critical_files/onconfig/sinodb.1
18 2022-03-07 11:22:16 0.0 /sinodb/critical_files/sqlhosts/sinodb.1
19 2022-03-07 14:28:38 0.2 /sinodb/rootdbs/1/sinodb.1
20 2022-03-07 14:28:40 0.1 /sinodb/datadbs3/1/sinodb.1
21 2022-03-07 14:28:40 0.1 /sinodb/llogdbs/1/sinodb.1
22 2022-03-07 14:28:41 0.1 /sinodb/plogdbs/1/sinodb.1
23 2022-03-07 14:28:41 0.1 /sinodb/datadbs4/1/sinodb.1
24 2022-03-07 14:28:41 0.1 /sinodb/datadbs2/1/sinodb.1
25 2022-03-07 14:28:41 0.1 /sinodb/datadbs5/1/sinodb.1
26 2022-03-07 14:28:41 0.1 /sinodb/bindbs1/1/sinodb.1
27 2022-03-07 14:28:41 0.1 /sinodb/sbdbs1/1/sinodb.1
28 2022-03-07 14:28:41 0.1 /sinodb/datadbs1/1/sinodb.1
29 2022-03-07 14:28:42 0.2 /sinodb/0/17/sinodb.1
30 2022-03-07 14:28:42 0.0 /sinodb/critical_files/ixbar/sinodb.2
31 2022-03-07 14:28:42 0.0 /sinodb/critical_files/oncfg/sinodb.2
32 2022-03-07 14:28:42 0.1 /sinodb/critical_files/onconfig/sinodb.2
33 2022-03-07 14:28:42 0.0 /sinodb/critical_files/sqlhosts/sinodb.2
[informix@vm84145 ~]$
进行L1备份后，备份文件数量由18个变为33个。
步骤6：L1备份前的数据准备（第二次）
t_employee新增1条数据(t7)
- 操作演示
[informix@vm84145 ~]$ dbaccess psmdb -
Database selected.
> insert into t_employee values(16, 3, 'employee_16');
1 row(s) inserted.
> select * from t_employee;
f_employeeid f_deptid f_employeename
1 1 employee_01
2 1 employee_02
3 2 employee_03
4 2 employee_04
5 3 employee_05
11 1 employee_11
12 1 employee_12
13 2 employee_13
14 2 employee_14
15 3 employee_15
16 3 employee_1611 row(s) retrieved.
> !date +'%F %T'
2022-03-07 14:33:01
>
步骤7：系统进行L1备份(t8)
- 语法
onbar -b -L 1
- 操作演示
[informix@vm84145 ~]$ onbar -b -L 1
[informix@vm84145 ~]$ onpsm -O listSinoDB Primary Storage Manager Object List
Object ID Date Created Size (MB) Logical path (name.version)
1 2022-03-07 11:22:14 24.1 /sinodb/rootdbs/0/sinodb.1
2 2022-03-07 11:22:14 0.1 /sinodb/plogdbs/0/sinodb.1
3 2022-03-07 11:22:14 0.1 /sinodb/llogdbs/0/sinodb.1
4 2022-03-07 11:22:14 9.4 /sinodb/datadbs1/0/sinodb.1
5 2022-03-07 11:22:14 0.1 /sinodb/sbdbs1/0/sinodb.1
6 2022-03-07 11:22:14 0.1 /sinodb/datadbs4/0/sinodb.1
7 2022-03-07 11:22:14 1.0 /sinodb/bindbs1/0/sinodb.1
8 2022-03-07 11:22:15 0.1 /sinodb/datadbs3/0/sinodb.1
9 2022-03-07 11:22:15 0.1 /sinodb/datadbs2/0/sinodb.1
10 2022-03-07 11:22:15 0.1 /sinodb/datadbs5/0/sinodb.1
11 2022-03-07 11:22:15 79.3 /sinodb/0/13/sinodb.1
12 2022-03-07 11:22:16 0.0 /sinodb/0/14/sinodb.1
13 2022-03-07 11:22:16 98.8 /sinodb/0/15/sinodb.1
14 2022-03-07 11:22:16 0.2 /sinodb/0/16/sinodb.1
15 2022-03-07 11:22:16 0.0 /sinodb/critical_files/ixbar/sinodb.1
16 2022-03-07 11:22:16 0.0 /sinodb/critical_files/oncfg/sinodb.1
17 2022-03-07 11:22:16 0.1 /sinodb/critical_files/onconfig/sinodb.1
18 2022-03-07 11:22:16 0.0 /sinodb/critical_files/sqlhosts/sinodb.1
19 2022-03-07 14:28:38 0.2 /sinodb/rootdbs/1/sinodb.1
20 2022-03-07 14:28:40 0.1 /sinodb/datadbs3/1/sinodb.1
21 2022-03-07 14:28:40 0.1 /sinodb/llogdbs/1/sinodb.1
22 2022-03-07 14:28:41 0.1 /sinodb/plogdbs/1/sinodb.1
23 2022-03-07 14:28:41 0.1 /sinodb/datadbs4/1/sinodb.1
24 2022-03-07 14:28:41 0.1 /sinodb/datadbs2/1/sinodb.1
25 2022-03-07 14:28:41 0.1 /sinodb/datadbs5/1/sinodb.1
26 2022-03-07 14:28:41 0.1 /sinodb/bindbs1/1/sinodb.1
27 2022-03-07 14:28:41 0.1 /sinodb/sbdbs1/1/sinodb.1
28 2022-03-07 14:28:41 0.1 /sinodb/datadbs1/1/sinodb.1
29 2022-03-07 14:28:42 0.2 /sinodb/0/17/sinodb.1
30 2022-03-07 14:28:42 0.0 /sinodb/critical_files/ixbar/sinodb.2
31 2022-03-07 14:28:42 0.0 /sinodb/critical_files/oncfg/sinodb.2
32 2022-03-07 14:28:42 0.1 /sinodb/critical_files/onconfig/sinodb.2
33 2022-03-07 14:28:42 0.0 /sinodb/critical_files/sqlhosts/sinodb.2
34 2022-03-07 14:34:06 0.2 /sinodb/rootdbs/1/sinodb.2
35 2022-03-07 14:34:08 0.1 /sinodb/datadbs3/1/sinodb.2
36 2022-03-07 14:34:08 0.1 /sinodb/datadbs2/1/sinodb.2
37 2022-03-07 14:34:08 0.1 /sinodb/datadbs4/1/sinodb.3
38 2022-03-07 14:34:08 0.1 /sinodb/datadbs5/1/sinodb.2
39 2022-03-07 14:34:08 0.1 /sinodb/llogdbs/1/sinodb.4
40 2022-03-07 14:34:08 0.1 /sinodb/bindbs1/1/sinodb.2
41 2022-03-07 14:34:08 0.1 /sinodb/sbdbs1/1/sinodb.2
42 2022-03-07 14:34:08 0.1 /sinodb/datadbs1/1/sinodb.2
43 2022-03-07 14:34:09 0.1 /sinodb/plogdbs/1/sinodb.4
44 2022-03-07 14:34:10 0.1 /sinodb/0/18/sinodb.1
45 2022-03-07 14:34:10 0.0 /sinodb/critical_files/ixbar/sinodb.5
46 2022-03-07 14:34:10 0.0 /sinodb/critical_files/oncfg/sinodb.5
47 2022-03-07 14:34:10 0.1 /sinodb/critical_files/onconfig/sinodb.5
48 2022-03-07 14:34:10 0.0 /sinodb/critical_files/sqlhosts/sinodb.5
[informix@vm84145 ~]$
进行两次L1备份后，备份文件变为48个。通过观察，onbar备份时，PSM是通过组织文件系统的目录来管理备份文件的。PSM为L0，L1，L2创建3个目录，分别为0，1，2。每个备份文件名称为<instance_name>.<seq_num>。
逻辑日志的备份，是按逻辑日志的唯一编号，创建对应的目录进行存储。
步骤8：L2备份前的数据准备
t_employee新增5条数据(t9)
- 语法
insert into t_employee values(21, 1, 'employee_21');
insert into t_employee values(22, 1, 'employee_22');
insert into t_employee values(23, 2, 'employee_23');
insert into t_employee values(24, 2, 'employee_24');
insert into t_employee values(25, 3, 'employee_25');
- 查看数据
[informix@vm84145 ~]$ dbaccess psmdb -
Database selected.
> select * from t_employee;
f_employeeid f_deptid f_employeename1 1 employee_01
2 1 employee_02
3 2 employee_03
4 2 employee_04
5 3 employee_05
11 1 employee_11
12 1 employee_12
13 2 employee_13
14 2 employee_14
15 3 employee_15
16 3 employee_16
21 1 employee_21
22 1 employee_22
23 2 employee_23
24 2 employee_24
25 3 employee_2516 row(s) retrieved.
> !date +'%F %T'
2022-03-07 14:40:09
>
步骤9：系统进行L2备份(t10)
- 语法
onbar -b -L 2
- 操作演示
[informix@vm84145 ~]$ onbar -b -L 2
[informix@vm84145 ~]$ onpsm -O listSinoDB Primary Storage Manager Object List
Object ID Date Created Size (MB) Logical path (name.version)
1 2022-03-07 11:22:14 24.1 /sinodb/rootdbs/0/sinodb.1
2 2022-03-07 11:22:14 0.1 /sinodb/plogdbs/0/sinodb.1
3 2022-03-07 11:22:14 0.1 /sinodb/llogdbs/0/sinodb.1
4 2022-03-07 11:22:14 9.4 /sinodb/datadbs1/0/sinodb.1
5 2022-03-07 11:22:14 0.1 /sinodb/sbdbs1/0/sinodb.1
6 2022-03-07 11:22:14 0.1 /sinodb/datadbs4/0/sinodb.1
7 2022-03-07 11:22:14 1.0 /sinodb/bindbs1/0/sinodb.1
8 2022-03-07 11:22:15 0.1 /sinodb/datadbs3/0/sinodb.1
9 2022-03-07 11:22:15 0.1 /sinodb/datadbs2/0/sinodb.1
10 2022-03-07 11:22:15 0.1 /sinodb/datadbs5/0/sinodb.1
11 2022-03-07 11:22:15 79.3 /sinodb/0/13/sinodb.1
12 2022-03-07 11:22:16 0.0 /sinodb/0/14/sinodb.1
13 2022-03-07 11:22:16 98.8 /sinodb/0/15/sinodb.1
14 2022-03-07 11:22:16 0.2 /sinodb/0/16/sinodb.1
15 2022-03-07 11:22:16 0.0 /sinodb/critical_files/ixbar/sinodb.1
16 2022-03-07 11:22:16 0.0 /sinodb/critical_files/oncfg/sinodb.1
17 2022-03-07 11:22:16 0.1 /sinodb/critical_files/onconfig/sinodb.1
18 2022-03-07 11:22:16 0.0 /sinodb/critical_files/sqlhosts/sinodb.1
19 2022-03-07 14:28:38 0.2 /sinodb/rootdbs/1/sinodb.1
20 2022-03-07 14:28:40 0.1 /sinodb/datadbs3/1/sinodb.1
21 2022-03-07 14:28:40 0.1 /sinodb/llogdbs/1/sinodb.1
22 2022-03-07 14:28:41 0.1 /sinodb/plogdbs/1/sinodb.1
23 2022-03-07 14:28:41 0.1 /sinodb/datadbs4/1/sinodb.1
24 2022-03-07 14:28:41 0.1 /sinodb/datadbs2/1/sinodb.1
25 2022-03-07 14:28:41 0.1 /sinodb/datadbs5/1/sinodb.1
26 2022-03-07 14:28:41 0.1 /sinodb/bindbs1/1/sinodb.1
27 2022-03-07 14:28:41 0.1 /sinodb/sbdbs1/1/sinodb.1
28 2022-03-07 14:28:41 0.1 /sinodb/datadbs1/1/sinodb.1
29 2022-03-07 14:28:42 0.2 /sinodb/0/17/sinodb.1
30 2022-03-07 14:28:42 0.0 /sinodb/critical_files/ixbar/sinodb.2
31 2022-03-07 14:28:42 0.0 /sinodb/critical_files/oncfg/sinodb.2
32 2022-03-07 14:28:42 0.1 /sinodb/critical_files/onconfig/sinodb.2
33 2022-03-07 14:28:42 0.0 /sinodb/critical_files/sqlhosts/sinodb.2
34 2022-03-07 14:34:06 0.2 /sinodb/rootdbs/1/sinodb.2
35 2022-03-07 14:34:08 0.1 /sinodb/datadbs3/1/sinodb.2
36 2022-03-07 14:34:08 0.1 /sinodb/datadbs2/1/sinodb.2
37 2022-03-07 14:34:08 0.1 /sinodb/datadbs4/1/sinodb.3
38 2022-03-07 14:34:08 0.1 /sinodb/datadbs5/1/sinodb.2
39 2022-03-07 14:34:08 0.1 /sinodb/llogdbs/1/sinodb.4
40 2022-03-07 14:34:08 0.1 /sinodb/bindbs1/1/sinodb.2
41 2022-03-07 14:34:08 0.1 /sinodb/sbdbs1/1/sinodb.2
42 2022-03-07 14:34:08 0.1 /sinodb/datadbs1/1/sinodb.2
43 2022-03-07 14:34:09 0.1 /sinodb/plogdbs/1/sinodb.4
44 2022-03-07 14:34:10 0.1 /sinodb/0/18/sinodb.1
45 2022-03-07 14:34:10 0.0 /sinodb/critical_files/ixbar/sinodb.5
46 2022-03-07 14:34:10 0.0 /sinodb/critical_files/oncfg/sinodb.5
47 2022-03-07 14:34:10 0.1 /sinodb/critical_files/onconfig/sinodb.5
48 2022-03-07 14:34:10 0.0 /sinodb/critical_files/sqlhosts/sinodb.5
49 2022-03-07 14:53:10 0.2 /sinodb/rootdbs/2/sinodb.1
50 2022-03-07 14:53:11 0.1 /sinodb/sbdbs1/2/sinodb.1
51 2022-03-07 14:53:12 0.1 /sinodb/datadbs2/2/sinodb.1
52 2022-03-07 14:53:12 0.1 /sinodb/datadbs5/2/sinodb.1
53 2022-03-07 14:53:12 0.1 /sinodb/datadbs3/2/sinodb.1
54 2022-03-07 14:53:12 0.1 /sinodb/llogdbs/2/sinodb.1
55 2022-03-07 14:53:12 0.1 /sinodb/bindbs1/2/sinodb.1
56 2022-03-07 14:53:12 0.1 /sinodb/datadbs1/2/sinodb.1
57 2022-03-07 14:53:13 0.1 /sinodb/plogdbs/2/sinodb.1
58 2022-03-07 14:53:14 0.1 /sinodb/datadbs4/2/sinodb.1
59 2022-03-07 14:53:14 0.2 /sinodb/0/19/sinodb.1
60 2022-03-07 14:53:14 0.0 /sinodb/critical_files/ixbar/sinodb.6
61 2022-03-07 14:53:14 0.0 /sinodb/critical_files/oncfg/sinodb.6
62 2022-03-07 14:53:14 0.1 /sinodb/critical_files/onconfig/sinodb.6
63 2022-03-07 14:53:14 0.0 /sinodb/critical_files/sqlhosts/sinodb.6
[informix@vm84145 ~]$
备份完成后，查看当前的逻辑日志唯一编号为20
- 操作演示
[informix@vm84145 ~]$ onstat -l
Sinoregal SinoDB Dynamic Server Version 12.10.FC8 -- On-Line -- Up 5 days 21:22:30 -- 2374324 Kbytes
Physical Logging
Buffer bufused bufsize numpages numwrits pages/io
P-1 38 1024 58319 939 62.11
phybegin physize phypos phyused %used
3:53 1023945 142425 38 0.00Logical Logging
Buffer bufused bufsize numrecs numpages numwrits recs/pages pages/io
L-3 0 512 424219 51014 39854 8.3 1.3
Subsystem numrecs Log Space used
OLDRSAM 423540 44231256
HA 644 28336
DDL 35 12180address number flags uniqid begin size used %used
475dffa8 7 U-B---- 17 2:53 102390 88 0.09
475fbf88 8 U-B---- 18 2:102443 102390 62 0.06
4886fd90 9 U-B---L 19 2:204833 102390 78 0.08
4886fdf8 10 U---C-- 20 2:307223 102390 11 0.01
4886fe60 11 U-B---- 11 2:409613 102390 51 0.05
4886fec8 12 U-B---- 12 2:512003 102390 10 0.01
4886ff30 13 U-B---- 13 2:614393 102390 40589 39.64
4886ff98 14 U-B---- 14 2:716783 102390 8 0.01
473abf68 15 U-B---- 15 2:819173 102390 50582 49.40
47481f40 16 U-B---- 16 2:921563 102390 101 0.10
10 active, 10 total[informix@vm84145 ~]$
至此，三级备份已完成。
步骤10：切换逻辑日志前的数据准备
t_dept新增1条数据(t11)
- 操作演示
[informix@vm84145 ~]$ dbaccess psmdb -
Database selected.
> insert into t_dept values(4, 'dept_4');
1 row(s) inserted.
> select * from t_dept;
f_deptid f_deptname
1 dept_1
2 dept_2
3 dept_3
4 dept_44 row(s) retrieved.
> !date +'%F %T'
2022-03-07 14:55:32
>
t_employee更新1条数据(t12)
操作演示
[informix@vm84145 ~]$ dbaccess psmdb -
Database selected.
> update t_employee set f_employeename = 'employee_updated' where f_employeeid = 11;
1 row(s) updated.
> select * from t_employee;
f_employeeid f_deptid f_employeename1 1 employee_01
2 1 employee_02
3 2 employee_03
4 2 employee_04
5 3 employee_05
11 1 employee_updated
12 1 employee_12
13 2 employee_13
14 2 employee_14
15 3 employee_15
16 3 employee_16
21 1 employee_21
22 1 employee_22
23 2 employee_23
24 2 employee_24
25 3 employee_2516 row(s) retrieved.
> !date +'%F %T'
2022-03-07 14:56:24
>
步骤11：切换逻辑日志(t13)
模拟因业务变化导致的日志切换
- 操作演示
[informix@vm84145 ~]$ onstat -l
Sinoregal SinoDB Dynamic Server Version 12.10.FC8 -- On-Line -- Up 5 days 21:26:14 -- 2374324 Kbytes
Physical Logging
Buffer bufused bufsize numpages numwrits pages/io
P-1 41 1024 58319 939 62.11
phybegin physize phypos phyused %used
3:53 1023945 142425 41 0.00Logical Logging
Buffer bufused bufsize numrecs numpages numwrits recs/pages pages/io
L-2 0 512 424226 51016 39856 8.3 1.3
Subsystem numrecs Log Space used
OLDRSAM 423547 44231732
HA 644 28336
DDL 35 12180address number flags uniqid begin size used %used
475dffa8 7 U-B---- 17 2:53 102390 88 0.09
475fbf88 8 U-B---- 18 2:102443 102390 62 0.06
4886fd90 9 U-B---L 19 2:204833 102390 78 0.08
4886fdf8 10 U---C-- 20 2:307223 102390 13 0.01
4886fe60 11 U-B---- 11 2:409613 102390 51 0.05
4886fec8 12 U-B---- 12 2:512003 102390 10 0.01
4886ff30 13 U-B---- 13 2:614393 102390 40589 39.64
4886ff98 14 U-B---- 14 2:716783 102390 8 0.01
473abf68 15 U-B---- 15 2:819173 102390 50582 49.40
47481f40 16 U-B---- 16 2:921563 102390 101 0.10
10 active, 10 total[informix@vm84145 ~]$ onmode -l
[informix@vm84145 ~]$ onstat -lSinoregal SinoDB Dynamic Server Version 12.10.FC8 -- On-Line -- Up 5 days 21:26:57 -- 2374324 Kbytes
Physical Logging
Buffer bufused bufsize numpages numwrits pages/io
P-1 41 1024 58319 939 62.11
phybegin physize phypos phyused %used
3:53 1023945 142425 41 0.00Logical Logging
Buffer bufused bufsize numrecs numpages numwrits recs/pages pages/io
L-1 0 512 424248 51021 39861 8.3 1.3
Subsystem numrecs Log Space used
OLDRSAM 423569 44234048
HA 644 28336
DDL 35 12180address number flags uniqid begin size used %used
475dffa8 7 U-B---- 17 2:53 102390 88 0.09
475fbf88 8 U-B---- 18 2:102443 102390 62 0.06
4886fd90 9 U-B---L 19 2:204833 102390 78 0.08
4886fdf8 10 U------ 20 2:307223 102390 14 0.01
4886fe60 11 U---C-- 21 2:409613 102390 4 0.00
4886fec8 12 U-B---- 12 2:512003 102390 10 0.01
4886ff30 13 U-B---- 13 2:614393 102390 40589 39.64
4886ff98 14 U-B---- 14 2:716783 102390 8 0.01
473abf68 15 U-B---- 15 2:819173 102390 50582 49.40
47481f40 16 U-B---- 16 2:921563 102390 101 0.10
10 active, 10 total[informix@vm84145 ~]$
切换逻辑日志后，当前逻辑日志唯一编号由20变为21。
步骤12：灾难前的最后一次数据变更
- 在灾难发生前，删除一个记录，用于后续恢复时的验证用例。
t_employee删除1条数据(t14)
[informix@vm84145 ~]$ dbaccess psmdb -
Database selected.
> delete from t_employee where f_employeeid = 14;
1 row(s) deleted.
> select * from t_employee;
f_employeeid f_deptid f_employeename1 1 employee_01
2 1 employee_02
3 2 employee_03
4 2 employee_04
5 3 employee_05
11 1 employee_updated
12 1 employee_12
13 2 employee_13
15 3 employee_15
16 3 employee_16
21 1 employee_21
22 1 employee_22
23 2 employee_23
24 2 employee_24
25 3 employee_2515 row(s) retrieved.
> !date +'%F %T'
2022-03-07 15:00:05
>
步骤13：模拟灾难发生
删除Chunk文件(t15)
- 语法
cd /home/informix/dbs/
rm -rf datadbs1-1
- 操作演示
[informix@vm84145 ~]$ cd /home/informix/dbs/
[informix@vm84145 dbs]$ ll
total 19968000
-rw-rw---- 1 informix informix 1048576000 Feb 25 18:13 bindbs1
-rw-rw---- 1 informix informix 2097152000 Mar 7 14:58 datadbs1-1
-rw-rw---- 1 informix informix 2097152000 Mar 1 17:31 datadbs2-1
-rw-rw---- 1 informix informix 2097152000 Mar 1 17:31 datadbs3-1
-rw-rw---- 1 informix informix 2097152000 Mar 1 17:31 datadbs4-1
-rw-rw---- 1 informix informix 2097152000 Mar 1 17:31 datadbs5-1
-rw-rw---- 1 informix informix 2097152000 Mar 7 14:59 llogdbs
-rw-rw---- 1 informix informix 2097152000 Mar 7 14:58 plogdbs
-rw-rw---- 1 informix informix 2097152000 Mar 7 14:58 rootdbs
-rw-rw---- 1 informix informix 1048576000 Mar 1 17:31 sbdbs1
-rw-rw---- 1 informix informix 524288000 Mar 7 14:58 tempdbs1
-rw-rw---- 1 informix informix 524288000 Mar 7 14:58 tempdbs2
-rw-rw---- 1 informix informix 524288000 Mar 7 14:58 tempdbs3
[informix@vm84145 dbs]$ rm -rf datadbs1-1
[informix@vm84145 dbs]$ ll
total 17920000
-rw-rw---- 1 informix informix 1048576000 Feb 25 18:13 bindbs1
-rw-rw---- 1 informix informix 2097152000 Mar 1 17:31 datadbs2-1
-rw-rw---- 1 informix informix 2097152000 Mar 1 17:31 datadbs3-1
-rw-rw---- 1 informix informix 2097152000 Mar 1 17:31 datadbs4-1
-rw-rw---- 1 informix informix 2097152000 Mar 1 17:31 datadbs5-1
-rw-rw---- 1 informix informix 2097152000 Mar 7 15:03 llogdbs
-rw-rw---- 1 informix informix 2097152000 Mar 7 15:03 plogdbs
-rw-rw---- 1 informix informix 2097152000 Mar 7 15:03 rootdbs
-rw-rw---- 1 informix informix 1048576000 Mar 1 17:31 sbdbs1
-rw-rw---- 1 informix informix 524288000 Mar 7 14:58 tempdbs1
-rw-rw---- 1 informix informix 524288000 Mar 7 14:58 tempdbs2
-rw-rw---- 1 informix informix 524288000 Mar 7 14:58 tempdbs3
[informix@vm84145 dbs]$
删除数据空间文件成功。
步骤14：灾难后的第一次数据变更
t_dept新增1条数据(t16)
[informix@vm84145 dbs]$ dbaccess psmdb -
Database selected.
> insert into t_dept values(5, 'dept_5');
1 row(s) inserted.
> select * from t_dept;
f_deptid f_deptname1 dept_1
2 dept_2
3 dept_3
4 dept_4
5 dept_55 row(s) retrieved.
> !date +'%F %T'
2022-03-07 15:04:33
>
即使在保存数据的Chunk文件被删除，最近的事务仍然可以执行成功。
备份逻辑日志(t17)
- 语法
onbar -b -l
- 操作演示
[informix@vm84145 dbs]$onbar -b l
[informix@vm84145 ~]$ onpsm -O listSinoDB Primary Storage Manager Object List
Object ID Date Created Size (MB) Logical path (name.version)
1 2022-03-07 11:22:14 24.1 /sinodb/rootdbs/0/sinodb.1
2 2022-03-07 11:22:14 0.1 /sinodb/plogdbs/0/sinodb.1
3 2022-03-07 11:22:14 0.1 /sinodb/llogdbs/0/sinodb.1
4 2022-03-07 11:22:14 9.4 /sinodb/datadbs1/0/sinodb.1
5 2022-03-07 11:22:14 0.1 /sinodb/sbdbs1/0/sinodb.1
6 2022-03-07 11:22:14 0.1 /sinodb/datadbs4/0/sinodb.1
7 2022-03-07 11:22:14 1.0 /sinodb/bindbs1/0/sinodb.1
8 2022-03-07 11:22:15 0.1 /sinodb/datadbs3/0/sinodb.1
9 2022-03-07 11:22:15 0.1 /sinodb/datadbs2/0/sinodb.1
10 2022-03-07 11:22:15 0.1 /sinodb/datadbs5/0/sinodb.1
11 2022-03-07 11:22:15 79.3 /sinodb/0/13/sinodb.1
12 2022-03-07 11:22:16 0.0 /sinodb/0/14/sinodb.1
13 2022-03-07 11:22:16 98.8 /sinodb/0/15/sinodb.1
14 2022-03-07 11:22:16 0.2 /sinodb/0/16/sinodb.1
15 2022-03-07 11:22:16 0.0 /sinodb/critical_files/ixbar/sinodb.1
16 2022-03-07 11:22:16 0.0 /sinodb/critical_files/oncfg/sinodb.1
17 2022-03-07 11:22:16 0.1 /sinodb/critical_files/onconfig/sinodb.1
18 2022-03-07 11:22:16 0.0 /sinodb/critical_files/sqlhosts/sinodb.1
19 2022-03-07 14:28:38 0.2 /sinodb/rootdbs/1/sinodb.1
20 2022-03-07 14:28:40 0.1 /sinodb/datadbs3/1/sinodb.1
21 2022-03-07 14:28:40 0.1 /sinodb/llogdbs/1/sinodb.1
22 2022-03-07 14:28:41 0.1 /sinodb/plogdbs/1/sinodb.1
23 2022-03-07 14:28:41 0.1 /sinodb/datadbs4/1/sinodb.1
24 2022-03-07 14:28:41 0.1 /sinodb/datadbs2/1/sinodb.1
25 2022-03-07 14:28:41 0.1 /sinodb/datadbs5/1/sinodb.1
26 2022-03-07 14:28:41 0.1 /sinodb/bindbs1/1/sinodb.1
27 2022-03-07 14:28:41 0.1 /sinodb/sbdbs1/1/sinodb.1
28 2022-03-07 14:28:41 0.1 /sinodb/datadbs1/1/sinodb.1
29 2022-03-07 14:28:42 0.2 /sinodb/0/17/sinodb.1
30 2022-03-07 14:28:42 0.0 /sinodb/critical_files/ixbar/sinodb.2
31 2022-03-07 14:28:42 0.0 /sinodb/critical_files/oncfg/sinodb.2
32 2022-03-07 14:28:42 0.1 /sinodb/critical_files/onconfig/sinodb.2
33 2022-03-07 14:28:42 0.0 /sinodb/critical_files/sqlhosts/sinodb.2
34 2022-03-07 14:34:06 0.2 /sinodb/rootdbs/1/sinodb.2
35 2022-03-07 14:34:08 0.1 /sinodb/datadbs3/1/sinodb.2
36 2022-03-07 14:34:08 0.1 /sinodb/datadbs2/1/sinodb.2
37 2022-03-07 14:34:08 0.1 /sinodb/datadbs4/1/sinodb.3
38 2022-03-07 14:34:08 0.1 /sinodb/datadbs5/1/sinodb.2
39 2022-03-07 14:34:08 0.1 /sinodb/llogdbs/1/sinodb.4
40 2022-03-07 14:34:08 0.1 /sinodb/bindbs1/1/sinodb.2
41 2022-03-07 14:34:08 0.1 /sinodb/sbdbs1/1/sinodb.2
42 2022-03-07 14:34:08 0.1 /sinodb/datadbs1/1/sinodb.2
43 2022-03-07 14:34:09 0.1 /sinodb/plogdbs/1/sinodb.4
44 2022-03-07 14:34:10 0.1 /sinodb/0/18/sinodb.1
45 2022-03-07 14:34:10 0.0 /sinodb/critical_files/ixbar/sinodb.5
46 2022-03-07 14:34:10 0.0 /sinodb/critical_files/oncfg/sinodb.5
47 2022-03-07 14:34:10 0.1 /sinodb/critical_files/onconfig/sinodb.5
48 2022-03-07 14:34:10 0.0 /sinodb/critical_files/sqlhosts/sinodb.5
49 2022-03-07 14:53:10 0.2 /sinodb/rootdbs/2/sinodb.1
50 2022-03-07 14:53:11 0.1 /sinodb/sbdbs1/2/sinodb.1
51 2022-03-07 14:53:12 0.1 /sinodb/datadbs2/2/sinodb.1
52 2022-03-07 14:53:12 0.1 /sinodb/datadbs5/2/sinodb.1
53 2022-03-07 14:53:12 0.1 /sinodb/datadbs3/2/sinodb.1
54 2022-03-07 14:53:12 0.1 /sinodb/llogdbs/2/sinodb.1
55 2022-03-07 14:53:12 0.1 /sinodb/bindbs1/2/sinodb.1
56 2022-03-07 14:53:12 0.1 /sinodb/datadbs1/2/sinodb.1
57 2022-03-07 14:53:13 0.1 /sinodb/plogdbs/2/sinodb.1
58 2022-03-07 14:53:14 0.1 /sinodb/datadbs4/2/sinodb.1
59 2022-03-07 14:53:14 0.2 /sinodb/0/19/sinodb.1
60 2022-03-07 14:53:14 0.0 /sinodb/critical_files/ixbar/sinodb.6
61 2022-03-07 14:53:14 0.0 /sinodb/critical_files/oncfg/sinodb.6
62 2022-03-07 14:53:14 0.1 /sinodb/critical_files/onconfig/sinodb.6
63 2022-03-07 14:53:14 0.0 /sinodb/critical_files/sqlhosts/sinodb.6
64 2022-03-07 15:05:24 0.0 /sinodb/0/20/sinodb.1
[informix@vm84145 dbs]$
可以通过下面的命令，查看数据的最新备份情况。
[informix@vm84145 dbs]$ onstat -g arc
Sinoregal SinoDB Dynamic Server Version 12.10.FC8 -- On-Line -- Up 5 days 21:35:28 -- 2374324 Kbytes
num DBSpace Q Size Q Len Buffer partnum size scannerDbspaces - Archive Status
name number level date log log-position
rootdbs 1 0 03/07/2022.11:22 16 0x12018
1 03/07/2022.14:34 18 0xd018
2 03/07/2022.14:53 19 0x13018
llogdbs 2 0 03/07/2022.11:22 16 0x1d018
1 03/07/2022.14:34 18 0x16018
2 03/07/2022.14:53 19 0x1b018
plogdbs 3 0 03/07/2022.11:22 16 0x1d018
1 03/07/2022.14:34 18 0x16018
2 03/07/2022.14:53 19 0x1b018
bindbs1 7 0 03/07/2022.11:22 16 0x1d018
1 03/07/2022.14:34 18 0x16018
2 03/07/2022.14:53 19 0x1b018
sbdbs1 8 0 03/07/2022.11:22 16 0x1d018
1 03/07/2022.14:34 18 0x18018
2 03/07/2022.14:53 19 0x1b018
datadbs1 9 0 03/07/2022.11:22 16 0x1d018
1 03/07/2022.14:34 18 0x16018
2 03/07/2022.14:53 19 0x1b018
datadbs2 10 0 03/07/2022.11:22 16 0x1d018
1 03/07/2022.14:34 18 0x16018
2 03/07/2022.14:53 19 0x1b018
datadbs3 11 0 03/07/2022.11:22 16 0x1d018
1 03/07/2022.14:34 18 0x16018
2 03/07/2022.14:53 19 0x1b018
datadbs4 12 0 03/07/2022.11:22 16 0x1d018
1 03/07/2022.14:34 18 0x16018
2 03/07/2022.14:53 19 0x1b018
datadbs5 13 0 03/07/2022.11:22 16 0x1d018
1 03/07/2022.14:34 18 0x16018
2 03/07/2022.14:53 19 0x1b018[informix@vm84145 dbs]$
步骤15：演示完全恢复(t18)
重启数据库，确定被删除的文件
在SinoDB启动过程中，会因无法打开被删除的文件而报错。
Cannot open chunk '/home/informix/dbs/datadbs1-1'
根据报错中的信息，得到被删除的Chunk文件（datadbs1_1）。
[informix@vm84145 dbs]$ onmode -ky
[informix@vm84145 dbs]$ onninit -vy
bash: onninit: command not found...
[informix@vm84145 dbs]$ oninit -vy
Reading configuration file '/home/informix/sinodb/etc/onconfig.sinodb'...succeeded
Creating /INFORMIXTMP/.infxdirs...succeeded
Allocating and attaching to shared memory...succeeded
Creating resident pool 22166 kbytes...succeeded
Creating infos file "/home/informix/sinodb/etc/.infos.sinodb"...succeeded
Linking conf file "/home/informix/sinodb/etc/.conf.sinodb"...succeeded
Initializing rhead structure...rhlock_t 32768 (1024K)... rlock_t (13281K)... Writing to infos file...succeeded
Initialization of Encryption...succeeded
Initializing ASF...succeeded
Initializing Dictionary Cache and SPL Routine Cache...succeeded
Initializing encryption-at-rest if necessary...succeeded
Bringing up ADM VP...succeeded
Creating VP classes...succeeded
Forking main_loop thread...succeeded
Initializing DR structures...succeeded
Forking 1 'soctcp' listener threads...succeeded
Starting tracing...succeeded
Initializing 32 flushers...succeeded
Initializing SDS Server network connections...succeeded
Initializing log/checkpoint information...succeeded
Initializing dbspaces...succeeded
Opening primary chunks...oninit: Cannot open chunk '/home/informix/dbs/datadbs1-1'. errno = 2
succeeded
Validating chunks...succeeded
Initialize Async Log Flusher...succeeded
Starting B-tree Scanner...succeeded
Init ReadAhead Daemon...succeeded
Init DB Util Daemon...succeeded
Initializing DBSPACETEMP list...succeeded