PostgreSQL恢复系列:pg_filedump批量处理---惜分飞

postgres=# \d

             List of relations

 Schema |      Name      | Type  |  Owner  

--------+----------------+-------+----------

 public | t_tbs          | table | postgres

 public | t_xff          | table | postgres

 public | t_xff2         | table | postgres

 public | t_xff3         | table | postgres

 public | t_xff4         | table | postgres

 public | t_xifenfei     | table | postgres

 public | tab_attribute  | table | postgres

 public | tab_class      | table | postgres

 public | tab_database   | table | postgres

 public | tab_namespace  | table | postgres

 public | tab_tablespace | table | postgres

 public | tab_type       | table | postgres

(12 rows)

postgres=# select * from tab_database;

  oid  |   datname   | datdba | encoding | datcollate  |  datctype   | datistemplate | datallowconn | datconnlimit | datlastsysoi

d | datfrozenxid | datminmxid | dattablespace

-------+-------------+--------+----------+-------------+-------------+---------------+--------------+--------------+-------------

--+--------------+------------+---------------

 14187 | postgres    |     10 |        6 | en_US.UTF-8 | en_US.UTF-8 | f             | t            |           -1 |         1418

6 |          479 |          1 |          1663

 16403 | db_xff      |     10 |        6 | en_US.UTF-8 | en_US.UTF-8 | f             | t            |           -1 |         1418

6 |          479 |          1 |          1663

     1 | template1   |     10 |        6 | en_US.UTF-8 | en_US.UTF-8 | t             | t            |           -1 |         1418

6 |          479 |          1 |          1663

 14186 | template0   |     10 |        6 | en_US.UTF-8 | en_US.UTF-8 | t             | f            |           -1 |         1418

6 |          479 |          1 |          1663

 16407 | db_xifenfei |  16405 |        6 | en_US.UTF-8 | en_US.UTF-8 | f             | t            |           -1 |         1418

6 |          479 |          1 |         16406

(5 rows)

postgres=# select count(1) from tab_class;

 count

-------

   407

(1 row)

postgres=# select *from pg_tablespace;

  oid  |   spcname    | spcowner | spcacl | spcoptions

-------+--------------+----------+--------+------------

  1663 | pg_default   |       10 |        |

  1664 | pg_global    |       10 |        |

 16406 | tbs_xifenfei |    16405 |        |

(3 rows)

[root@xifenfei tmp]# ./pg_filedump_batch recover --database-oid=14187  \

 --output-directory=/data/recovery --pgdata=/var/lib/pgsql/12/data

Recover tables in database with oid: 14187

LOG: starting to process table tab_attribute

LOG: starting to process table tab_class

LOG: starting to process table tab_database

LOG: starting to process table tab_namespace

LOG: starting to process table tab_tablespace

LOG: starting to process table tab_type

LOG: starting to process table t_tbs

LOG: starting to process table t_xff

LOG: starting to process table t_xff2

LOG: starting to process table t_xff3

LOG: starting to process table t_xff4

LOG: starting to process table t_xifenfei

Check dumps in /data/recovery

[root@xifenfei tmp]# cd /data/recovery/

[root@xifenfei recovery]# ls -ltr

total 156

-rw-r--r-- 1 root root 82797 Apr 18 20:35 recovered-14187-tab_attribute.csv

-rw-r--r-- 1 root root 31129 Apr 18 20:35 recovered-14187-tab_class.csv

-rw-r--r-- 1 root root   343 Apr 18 20:35 recovered-14187-tab_database.csv

-rw-r--r-- 1 root root   118 Apr 18 20:35 recovered-14187-tab_namespace.csv

-rw-r--r-- 1 root root    50 Apr 18 20:35 recovered-14187-tab_tablespace.csv

-rw-r--r-- 1 root root  7907 Apr 18 20:35 recovered-14187-tab_type.csv

-rw-r--r-- 1 root root     0 Apr 18 20:35 recovered-14187-t_tbs.csv

-rw-r--r-- 1 root root    38 Apr 18 20:35 recovered-14187-t_xff.csv

-rw-r--r-- 1 root root    38 Apr 18 20:35 recovered-14187-t_xff2.csv

-rw-r--r-- 1 root root    38 Apr 18 20:35 recovered-14187-t_xff3.csv

-rw-r--r-- 1 root root    38 Apr 18 20:35 recovered-14187-t_xff4.csv

-rw-r--r-- 1 root root    38 Apr 18 20:35 recovered-14187-t_xifenfei.csv

[root@xifenfei recovery]# cat recovered-14187-tab_database.csv

14187   postgres        10      6       en_US.UTF-8     en_US.UTF-8     f       t       -1      14186   479     1       1663

16403   db_xff  10      6       en_US.UTF-8     en_US.UTF-8     f       t       -1      14186   479     1       1663

1       template1       10      6       en_US.UTF-8     en_US.UTF-8     t       t       -1      14186   479     1       1663

14186   template0       10      6       en_US.UTF-8     en_US.UTF-8     t       f       -1      14186   479     1       1663

16407   db_xifenfei     16405   6       en_US.UTF-8     en_US.UTF-8     f       t       -1      14186   479     1       16406

[root@xifenfei recovery]# cat recovered-14187-tab_class.csv|wc -l

407

[root@xifenfei recovery]# cat recovered-14187-tab_tablespace.csv

1663    pg_default

1664    pg_global

16406   tbs_xifenfei

postgres=# COPY tab_class_new FROM '/data/recovery/recovered-14187-tab_class.csv';

COPY 407

postgres=# select count(1) from tab_class;

 count

-------

   407

(1 row)

 count

-------

   407

(1 row)

postgres=# select count(1) from tab_class_new;

 count

-------

   407

(1 row)

postgres=# select * from tab_class_new

postgres-# EXCEPT

postgres-# select * from tab_class;

 oid | relname | relnamespace | reltype | reloftype | relowner | relam | relfilenode | reltablespace | relpages | reltuples | rel

allvisible | reltoastrelid | relhasindex | relisshared | relpersistence | relkind

-----+---------+--------------+---------+-----------+----------+-------+-------------+---------------+----------+-----------+----

-----------+---------------+-------------+-------------+----------------+---------

(0 rows)

postgres=# select * from tab_class

postgres-# EXCEPT

postgres-# select * from tab_class_new;

 oid | relname | relnamespace | reltype | reloftype | relowner | relam | relfilenode | reltablespace | relpages | reltuples | rel

allvisible | reltoastrelid | relhasindex | relisshared | relpersistence | relkind

-----+---------+--------------+---------+-----------+----------+-------+-------------+---------------+----------+-----------+----

-----------+---------------+-------------+-------------+----------------+---------

(0 rows)