Oracle 一次生产分库,升级,迁移

今天完成了一个负载较高的中央数据库的分库操作, 并实现了oracle的滚动升级(10.2.0.1->10.2.0.4), 业务中断仅15分钟. 平台: RHEL AS 4 + Oracle 10.2.0.1

分库目的:

SELECT   streams_name,
           streams_type,
           cumulative_message_count,
           first_message_time,
           XIDUSN,
           XIDSLT,
           XIDSQN,
           last_message_time,
           total_message_count
    FROM   v$streams_transaction
ORDER BY   3 DESC;

--7) 从源库获得重建序列语句, Streams复制这点特别注意, 因为Streams本身不会去同步序列值

set pages 0
SELECT   'DROP SEQUENCE ' || sequence_owner || '.' || sequence_name || ';'
            stmt
FROM   dba_sequences
WHERE   sequence_owner IN
               ('BUSINESS', 'BUSINESS_APP')
UNION ALL
SELECT      'CREATE SEQUENCE '
         || sequence_owner
         || '.'
         || sequence_name
         || ' start with '
         || last_number
         || ' MAXVALUE '
         || max_value
         || ' MINVALUE '
         || min_value 
     || DECODE (cycle_flag, 'N', ' NOCYCLE ', ' CYCLE ')
     || DECODE (cache_size, 0, ' NOCACHE ', ' CACHE '||cache_size)

     || DECODE (ORDER_FLAG, 'N', ' NOORDER ', ' ORDER ')       

     || ';' stmt

FROM   dba_sequences
WHERE   sequence_owner IN
               ('BUSINESS', 'BUSINESS_APP');

--8) 目标库重建序列

--9) 源库和目标库刷新同义词, 把同义词指向新的dblink, 同义词脚本提前准备好

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