1.跨資料庫節點建立dblink
訪問庫:10.156.10.182
被訪問庫:
10.156.11.79(dg備庫)---10.156.11.31/32/33(dg主庫)
為了分離dg庫的壓力,訪問庫通過dblink從dg備庫取數。
1:被訪問庫建立使用者賦權:
create user query_zbx identified by 111;
grant connect to query_zbx;
grant select on elite.gd_hf_pol_add to query_zbx;
2:訪問庫上建立dblink
create public database link to_cc
connect to query_zbx identified by 111
using '(description =
(address_list =
(address = (protocol = tcp)(host = 10.156.11.79)(port = 1521))
)(connect_data =
(service_name = ccprdg)
))';
3:驗證dblink:
sql> create public database link to_cc
2 connect to query_zbx identified by 111
3 using '(description =
4 (address_list =
5 (address = (protocol = tcp)(host = 10.156.11.79)(port = 1521))
6 )
7 (connect_data =
8 (service_name = ccprdg)
9 )
10 )';
database link created.
sql> select sysdate from dual@to_cc;
sysdate
---------
06-mar-18
4:對比dg主庫,將dblink配置修改成主庫:
sql> create public database link to_cc
2 connect to query_zbx identified by 111
3 using '(description =
4 (address_list =
5 (address = (protocol = tcp)(host = 10.156.11.31)(port = 1521))
6 (address = (protocol = tcp)(host = 10.156.11.32)(port = 1521))
7 (address = (protocol = tcp)(host = 10.156.11.33)(port = 1521))
8 )
9 (connect_data =
10 (service_name = ccpr)
11 )
12 )';
database link created.
sql> select sysdate from dual@to_cc;
sysdate
---------
06-mar-18
sql> select count(*) from elite.gd_hf_pol_add@to_cc;
count(*)
----------
130124
2.不跨節點的資料的的blink建立
*****************建立使用者test1、test2
*****************
sql> create user test1 identified by test1;
user created.
sql> create user test2 identified by test2;
user created.
*****************
使用者賦權
*****************
sql> grant connect,resource to test1;
grant succeeded.
sql> grant connect,resource to test2;
grant succeeded.
*****************
test1建立dblink
*****************
grant create public database link to test1;
create public database link test1_test2 connect to test2 identified by test2 using 'dblink';
database link created.
*****************
使用者test2測試dblink
*****************
sql> select sysdate from dual@test1_test2;
sysdate
------------------
28-nov-18
*****************
使用者test3測試dblink
*****************
sql> create user test3 identified by test3;
user created.
sql> grant connect,resource to test3;
grant succeeded.
sql> connect test3/test3
connected.
sql> select sysdate from dual@test1_test2;
sysdate
------------------
28-nov-18
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