DB2數據復制與遷移的操作方案大盤點
此文章主要向大家介紹的是DB2數據復制與遷移的實際操作方法的描述,本文的方法是經過測試后的,在環(huán)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控制臺(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(zhí)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(zhí)行export腳本;
8. 連接目標DB2數據復制執(zhí)行import腳本;
附錄1:生成export腳本代碼示例:/**
- * 創(chuàng)建導出腳本
 - * @param conn
 - * @param creator 表創(chuàng)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 = "\r\n";
 - 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(chuàng)建裝載腳本
 - * @param conn
 - * @param creator 表創(chuàng)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 = "\r\n";
 - 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
 
以上的相關內容就是對DB2數據復制和遷移方法的介紹,望你能有所收獲。
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