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 程式師世界 >> 數據庫知識 >> DB2數據庫 >> DB2教程 >> 詳細講解IBM DB2的數據復制和遷移方法

詳細講解IBM DB2的數據復制和遷移方法

編輯:DB2教程

以下方法經測試,在環境IBM x346,3.2G×2,4G,RAID 1,DB2 V8.2.4,Win2000 Adv Server,DMS表空間中,數據的load速度在60-100萬條/min左右。

背景:

需要更改數據庫表空間,或者需要將數據庫中所有表的數據遷移到一個新的數據庫中。

步驟:

1.通過db2控制台(db2cc)選中源數據庫中的所有表,將其導出成DDL腳本;

2.根據需要對腳本進行必要的修改,譬如更改表空間為GATHER;

3.新建數據庫,新建DMS表空間:GATHER;

4.將DDL腳本在此數據庫中執行;

5.編寫代碼查詢源數據庫中的所有表,自動生成export腳本;

6.編寫代碼查詢源數據庫中的所有表,自動生成import腳本;

7.連接源數據庫執行export腳本;

8.連接目標數據庫執行import腳本;

附錄1:生成export腳本代碼示例:

/**

* 創建導出腳本

* @param conn

* @param creator 表創建者

* @param filePath

*/

public void createExportFile(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 = "rn";

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);

}

附錄2:生成import腳本代碼示例:

/**

* 創建裝載腳本

* @param conn

* @param creator 表創建者

* @param filePath

*/

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 = "rn";

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);

}

附錄3:export腳本示例

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

附錄4:import腳本示例

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 a

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