DB2的复制迁移

DB2的复制迁移

以下方法经测试，在环境IBM x346,3.2G×2,4G,RAID 1,DB2 V8.2.4,Win2000 Adv Server，DMS表空间中，数据的load速度在60-100万条/min左右。
背景：需要更改数据库表空间，或者需要将数据库中所有表的数据迁移到一个新的数据库中。
步骤：
1.通过db2控制台(db2cc)选中源数据库中的所有表，将其导出成DDL脚本；
2.根据需要对脚本进行必要的修改，譬如更改表空间为GATHER；
3.新建数据库，新建DMS表空间：GATHER；
4.将DDL脚本在此数据库中执行；
5.编写代码查询源数据库中的所有表，自动生成export脚本；
6.编写代码查询源数据库中的所有表，自动生成import脚本；
7.连接源数据库执行export脚本；
8.连接目标数据库执行import脚本；
附录1:生成export脚本代码示例：
public void createExportFile(Connection conn,String creator,String filePath) throws Exception {
DBBase dbBase = new DBBase(conn);
String selectTableSql 2= select name from sysibm.systables where creator = ' + creator + ' and type='T';
try {
dbBase.executeQuery(selectTableSql2);
} catch (Exception ex) {
throw ex;
} finally {
dbBase.close();
}
DBResult result = dbBase.getSelectDBResult();
List list = new ArrayList();
while (result.next()) {
String table = result.getString(1);
list.add(table);
}
StringBuffer sb = new StringBuffer();
String enterFlag = ;
for (int i = 0; i < list.size();i++) {
String tableName = (String)list.get(i);
sb.append(db2 export to aa + String.valueOf(i+1)+ .ixf of ixf select * from + tableName + );
sb.append(enterFlag);
}
String str = sb.toString();
FileUtility.saveStringToFile(filePath, str, false);
}　附录2:生成import脚本代码示例:
public void createLoadFile(Connection conn,String creator,String filePath) throws Exception {
DBBase dbBase = new DBBase(conn);
String selectTableSql = select name from sysibm.systables where creator = ' + creator + ' and type='T';
try {
dbBase.executeQuery(selectTableSql);
} catch (Exception ex) {
throw ex;
} finally {
dbBase.close();
}
DBResult result = dbBase.getSelectDBResult();
List list = new ArrayList();
while (result.next()) {
String table = result.getString(1);
list.add(table);
}
StringBuffer sb = new StringBuffer();
String enterFlag = ;
for (int i = 0; i < list.size();i++) {
String tableName = (String)list.get(i);
sb.append(db2 load from aa + String.valueOf(i+1)+ .ixf of ixf into + tableName + COPY NO without prompting );
sb.append(enterFlag);
}
String str = sb.toString();
FileUtility.saveStringToFile(filePath, str, false);
}　附录3:export脚本示例db2 connect to testdb user test password test
db2 export to aa1.ixf of ixf select * from table1
db2 export to aa2.ixf of ixf select * from table2
db2 connect reset　附录4:import脚本示例db2 connect to testdb user test password test
db2 load from aa1.ixf of ixf replace into table1 COPY NO without prompting
db2 load from aa2.ixf of ixf replace into table2 COPY NO without prompting
db2 connect reset