DB2數(shù)據(jù)復(fù)制、遷移方法
DB2數(shù)據(jù)庫的數(shù)據(jù)復(fù)制以及遷移是DB2數(shù)據(jù)庫操縱經(jīng)常用到的，數(shù)據(jù)復(fù)制、遷移是要講求一定方法的，這些方法會(huì)很大程度簡便我們的操作，大家何樂而不為?。肯旅婢椭攸c(diǎn)為大家介紹DB2數(shù)據(jù)庫數(shù)據(jù)復(fù)制、遷移的方法。
DB2數(shù)據(jù)復(fù)制、遷移方法
以下方法經(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(gè)新的數(shù)據(jù)庫中。
步驟：
1.通過db2控制臺(tái)(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(duì)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?cè)磾?shù)據(jù)庫中的所有表，自動(dòng)生成export腳本；
6.編寫代碼查詢?cè)磾?shù)據(jù)庫中的所有表，自動(dòng)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);
}
#p#
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
這就是我為大家介紹的DB2數(shù)據(jù)庫數(shù)據(jù)復(fù)制、遷移的方法的全部內(nèi)容，希望文章中介紹的方法大家在以后的工作中都能用到。
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