IBM DB2數(shù)據(jù)復(fù)制與遷移方法的背景與實(shí)際操作步驟
文章主要講述的是IBM DB2數(shù)據(jù)復(fù)制與遷移方法的描述，下面的這些方法都是經(jīng)過相關(guān)經(jīng)測試，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(shù)據(jù)的load速度在60-100萬條/min左右。
背景：
需要更改數(shù)據(jù)庫表空間，或者需要將數(shù)據(jù)庫中所有表的數(shù)據(jù)遷移到一個新的數(shù)據(jù)庫中。
步驟：
1.通過db2控制臺(db2cc)選中源數(shù)據(jù)庫中的所有表，將其導(dǎo)出成DDL腳本；
2.根據(jù)需要對腳本進(jìn)行必要的修改，譬如更改表空間為GATHER；
3.新建數(shù)據(jù)庫，新建DMS表空間：GATHER；
4.將DDL腳本在此數(shù)據(jù)庫中執(zhí)行；
5.編寫代碼查詢源數(shù)據(jù)庫中的所有表，自動生成export腳本；
6.編寫代碼查詢源數(shù)據(jù)庫中的所有表，自動生成import腳本；
7.連接源數(shù)據(jù)庫執(zhí)行export腳本；
8.連接目標(biāo)數(shù)據(jù)庫執(zhí)行import腳本；
附錄1:生成export腳本代碼示例：
/**
* 創(chuàng)建導(dǎo)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
- TAG: IBM ibm
