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Db2pd -db MY DATABASE -tcbstats index. 建立表格的MDC(Multiple Dimensinal Clustering) index。MDC比一般的Clustering index好的一點在於它會自動維護data的clustering，不像一般的Clustering index，隨著資料的異動，Clustering ratio會越來越低。且一般來說，MDC的效能會比較好。不過要注意的是 MDC的dimention必需選擇cardinality較低的column. 65292;如此一來，一個Cell才可以包含愈多的範圍，可節省所需建立的Block數(即extent). 名解解釋：Cell是MDC中，每個dimension的值的交集，每個Cell至少會被指定一個Block. CREATE TABLE T1 . 160; (c1 DATE, . 160; c2 INT, . 160; c3 INT, . 160; c4 DOUBLE, . 160; ORGANIZE BY DIMENSIONS (c5, c3). 160; ...160;...

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Db2pd -db MY DATABASE -tcbstats index. 建立表格的MDC(Multiple Dimensinal Clustering) index。MDC比一般的Clustering index好的一點在於它會自動維護data的clustering，不像一般的Clustering index，隨著資料的異動，Clustering ratio會越來越低。且一般來說，MDC的效能會比較好。不過要注意的是 MDC的dimention必需選擇cardinality較低的column. 65292;如此一來，一個Cell才可以包含愈多的範圍，可節省所需建立的Block數(即extent). 名解解釋：Cell是MDC中，每個dimension的值的交集，每個Cell至少會被指定一個Block. CREATE TABLE T1 . 160; (c1 DATE, . 160; c2 INT, . 160; c3 INT, . 160; c4 DOUBLE, . 160; ORGANIZE BY DIMENSIONS (c5, c3). 160; ...160;&#1...

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5 下列指令依序列出資料庫中index的使用率

6 張貼者： vincent

7 沒有留言

8 標籤： db2

9 以下為建立trusted context之語法詳細語法介紹可參照參考資料2

10 建立好之後，可以用下列sample code來進行測試

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skip to main,skip to sidebar,ibm softwares,db2 tips,下列指令依序列出資料庫中index的使用率,張貼者： vincent,沒有留言,標籤： db2,以下為建立trusted context之語法詳細語法介紹可參照參考資料2,建立好之後，可以用下列sample code來進行測試,參考資料,create trusted context語法,db2cfgimp fname,其中，fname為要匯入的檔名,identityoverride,servera

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IBM Softwares | systemz-learning.blogspot.com Reviews

https://systemz-learning.blogspot.com

Db2pd -db MY DATABASE -tcbstats index. 建立表格的MDC(Multiple Dimensinal Clustering) index。MDC比一般的Clustering index好的一點在於它會自動維護data的clustering，不像一般的Clustering index，隨著資料的異動，Clustering ratio會越來越低。且一般來說，MDC的效能會比較好。不過要注意的是 MDC的dimention必需選擇cardinality較低的column. 65292;如此一來，一個Cell才可以包含愈多的範圍，可節省所需建立的Block數(即extent). 名解解釋：Cell是MDC中，每個dimension的值的交集，每個Cell至少會被指定一個Block. CREATE TABLE T1 . 160; (c1 DATE, . 160; c2 INT, . 160; c3 INT, . 160; c4 DOUBLE, . 160; ORGANIZE BY DIMENSIONS (c5, c3). 160; ...160;&#1...

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systemz-learning.blogspot.com

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IBM Softwares: 五月 2010

http://systemz-learning.blogspot.com/2010_05_01_archive.html

For version 6.0.x:. Start IBM Rational Software Development Platform executable (. Argument followed by the language. For United States English) such as:. Rationalsdp.exe -nl en US. Under the individual VMArgs section as shown below:. Add other individual VMArgs with additional VMArgs keys i.e. Are located by default in:. IBM INSTALL DIR rational SPD 6.0. C: Program Files IBM Rational SDP 6.0. For version 7.0.x:. Start IBM Rational Software Delivery Platform with the. Argument followed by the language.

2

IBM Softwares: 一月 2011

http://systemz-learning.blogspot.com/2011_01_01_archive.html

資料來源： http:/ publib.boulder.ibm.com/infocenter/db2luw/v8/index.jsp? Topic=/com.ibm.db2.udb.doc/core/r0008304.htm. 在設計資料庫的schema時，若針對Primary Key有設定Generated Identity屬性，在load資料時，會出現無法匯入的訊息，此時可以在LOAD command中加上 modified by. 選項，如此一來，就會把 source table的identity column的值直接覆蓋到target table的identity column。範例指令如下. Db2 load from load.del of del modified by. Http:/ www.ibm.com/developerworks/data/library/techarticle/dm-0405melnyk/index.html. 更改DB2 Server Name- -透過db2nodes.cfg. 執行 3 個資料庫分割區伺服器，則可更新. DB2 windows版本的d...

3

IBM Softwares: 十二月 2009

http://systemz-learning.blogspot.com/2009_12_01_archive.html

在Ubuntu中安裝任何東西時，可使用apt-get這個好用的程式。例如，要安裝gcc時，只要執行下面指令，就可以安裝完成. Sudo apt-get build-dep gcc. Sudo apt-get install linux-source. Sudo apt-get install linux-headers. 指令會回傳不同release的list，此時使用uname –r 指令先確定目前的linux release 後，再重新執行. Sudo apt-get install linux-headers-2.6.31-14-generic. 從接到應用程式的請求開始，DB2就由一連串的agent(又稱EDU, Engine Dispatchable Units. 如下圖所示，依據使用的Protocol不同，每一個Instance都會有一個相對應的Listener來等候使用者的請求，Listener有下列三種. 65306;處理遠端Client的請求，當client 與server位於不同OS image時，使用TCP/IP與此Listener溝通. 接下來介紹db2相關的process&#1...

4

IBM Softwares: 七月 2010

http://systemz-learning.blogspot.com/2010_07_01_archive.html

WebSphere Application Server Dynamic Cache. WAS會cache servlet、WAS指令及JSP執行結果，以增進應用程式執行效能。WAS將這些cache活動，如servlet、Web servcies、WebSphere Command整合到Dynamic Cache這個服務之下。 Dynamic cahce service執行於AP server所在的JVM中，攔截servlet service的呼叫或是WAS指令的執行，將其執行結果cache起來，之後再呼叫同樣的servlet時，就可直接裝cache起來的object回傳，以增進效能。在WAS上開啟 dynamic cache的方法如下：. 2選定要設定的server後，選取Container Services下面的Dynamic Cache Service. 訂閱：文章 (Atom). WebSphere Application Server Dynamic Cache.

5

IBM Softwares: 八月 2011

http://systemz-learning.blogspot.com/2011_08_01_archive.html

Db2pd -db MY DATABASE -tcbstats index. 建立表格的MDC(Multiple Dimensinal Clustering) index。MDC比一般的Clustering index好的一點在於它會自動維護data的clustering，不像一般的Clustering index，隨著資料的異動，Clustering ratio會越來越低。且一般來說，MDC的效能會比較好。不過要注意的是 MDC的dimention必需選擇cardinality較低的column. 65292;如此一來，一個Cell才可以包含愈多的範圍，可節省所需建立的Block數(即extent). 名解解釋：Cell是MDC中，每個dimension的值的交集，每個Cell至少會被指定一個Block. CREATE TABLE T1 . 160; (c1 DATE, . 160; c2 INT, . 160; c3 INT, . 160; c4 DOUBLE, . 160; ORGANIZE BY DIMENSIONS (c5, c3).

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IBM Softwares

Db2pd -db MY DATABASE -tcbstats index. 建立表格的MDC(Multiple Dimensinal Clustering) index。MDC比一般的Clustering index好的一點在於它會自動維護data的clustering，不像一般的Clustering index，隨著資料的異動，Clustering ratio會越來越低。且一般來說，MDC的效能會比較好。不過要注意的是 MDC的dimention必需選擇cardinality較低的column. 65292;如此一來，一個Cell才可以包含愈多的範圍，可節省所需建立的Block數(即extent). 名解解釋：Cell是MDC中，每個dimension的值的交集，每個Cell至少會被指定一個Block. CREATE TABLE T1 . 160; (c1 DATE, . 160; c2 INT, . 160; c3 INT, . 160; c4 DOUBLE, . 160; ORGANIZE BY DIMENSIONS (c5, c3). 160; ...160;&#1...

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