db2 udb - international informix users group

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IBM Software Group © 2005 IBM Corporation DB2 UDB the Basics Keith E. Gardenhire [email protected]

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Page 1: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation

DB2 UDB the Basics

Keith E. [email protected]

Page 2: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation2

Introduction

DB2 UDB V8.2

Basic Database Administration

Page 3: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation3

Products

DB2 Personal Edition

DB2 Workgroup Server Edition

DB2 Enterprise Server Edition

DB2 Workgroup Server Unlimited Edition

DB2 UDB Express Edition

Page 4: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation4

Data Partitioning Feature

Data Data Data Data

Ethernet

Node 1 Node 2 Node 3 Node 4

Page 5: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation5

Instance Manages one or more databases

Must have root or Administrator Authority to create

db2icrt is used to create an instance

db2idrop is used to drop an instance

db2iupdt is used to update the instance

db2icrt -u fencedusr instance_name

db2start will start an instance

db2stop will stop an instance

Page 6: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation6

Creating the Database

Create db database-name

Creates three table spaces

Creates System Catalog Tables

Page 7: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation7

Create Database Command

CREATE DATABASE dbname AS alias_name

Page 8: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation8

Table SpaceLogical layer between Hardware and Database

Comprised of one or more containers

A container is a file or a directory

REGULAR

CREATE TABLESPACE name

LARGE

SYSTEM

TEMPORARY

USER

MANAGED BY SYSTEM system-containers

DATABASE database-containers

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IBM Software Group

© 2005 IBM Corporation9

System ContainersSMS Containers

USING (‘container string’)

DMS Containers

USING (FILE ‘container string’ number of pages)

(DEVICE ‘container string’ number of pages)

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IBM Software Group

© 2005 IBM Corporation10

Table Space Example

CREATE TABLESPACE TS1 MANAGED BY SYSTEM

USING (‘/home/inst01/database/ts1’)

CREATE TABLESPACE DMS01D MANAGED BY DATABASE

USING (FILE ‘C:\DMS\DATABASE\DMS01D’ 1000)

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IBM Software Group

© 2005 IBM Corporation11

Create Tables

Command Line

db2 create table ARTISTS (

ARTNO SMALLINT NOT NULL,

NAME VARCHAR(40),

COMPANY CHAR(20), BIO CLOB (10K) NOT LOGGED,

PICTURE BLOB (2700K) NOT LOGGED )

IN DMS01D INDEX IN DMS01I LONG IN DMS01L

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IBM Software Group

© 2005 IBM Corporation12

Create Table Script File

create table warehouse (itemno smallint, warehousename char(20), qty integer ) in dms03d;

The script file cr_warehouse contains the above info

db2 –tvf cr_warehouse

Page 13: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation13

Table CharacteristicsDescribe command

db2 describe table ARTISTSColumn Type Typename schema name Length Scale Nulls--------------- --------- ------------------ -------- ----- ------ARTNO SYSIBM SMALLINT 2 0 NoNAME SYSIBM VARCHAR 40 0 YesCOMPANY SYSIBM CHARACTER 20 0 YesBIO SYSIBM CLOB 20480 0 YesPICTURE SYSIBM BLOB 2764800 0 Yes

Page 14: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation14

Describe Indexes

Page 15: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation

Moving Data

Page 16: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation16

Moving Data

IMPORT

EXPORT

LOAD

db2move

Page 17: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation17

Import / Export

FileImport

Export

Page 18: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation18

IMPORT utility

IMPORT FROM filename OF IXF

DEL

ASC

LOBS FROM lob-path MODIFIED BY options

MESSAGES

INSERT INTO table-name

INSERT_UPDATE

REPLACE

REPLACE_CREATE

Page 19: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation19

Export

EXPORT TO file OF IXF MESSAGES message-file

DEL

WSF

select statement

Page 20: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation20

LOAD

1) Load Loads data, collects index keys

2) Build creates the indexes

3) Delete Delete unique key violations place into exception tables.

4) Index Copy – copy indexes from temp table space

Page 21: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation21

LOAD Command

LOAD FROM filename OF IXF

ASC

DEL

LOBS FROM lob-path MODIFIED BY options

MESSAGES message-file

INSERT INTO table-name

REPLACE

RESTART

TERMINATE

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IBM Software Group

© 2005 IBM Corporation22

LOAD from Cursor

Create nickname sales for

another database SAMPLE table SALES

Create nickname employee for

another database SAMPLE table EMPLOYEE

DECLARE C1 CURSOR FOR SELECT SALES.SALES_PERSON, LASTNAME, FIRSTNME FROM SALES, EMPLOYEE

WHERE SALES_PERSON = EMPLOYEE.LASTNAME

LOAD FROM C1 OF CURSOR INSERT INTO LOCAL_SALES

Page 23: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation23

db2move

db2move

Database

db2move.lst

table.ixf

DB2MOVE

Page 24: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation24

db2move syntax

db2move database-name import

export

load

tc table-creators

tn table-name

sn schema-names

ts table space-names

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IBM Software Group

© 2005 IBM Corporation

GUI Tools Using Graphical User Interface

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IBM Software Group

© 2005 IBM Corporation26

Using the Control Center

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IBM Software Group

© 2005 IBM Corporation27

Control Center – Create Database

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IBM Software Group

© 2005 IBM Corporation28

Examples of Table Space

CREATE TABLESPACE TS1 MANAGED BY SYSTEM

USING (‘C:\SMS\MUSICKEG\TS1’)

CREATE TABLESPACE DMS01D MANAGED BY DATABASE

USING (FILE ‘C:\DMS\MUSICKEG\DMS01D’ 161)

EXTENTSIZE 8 PREFETECHSIZE 8

CREATE TABLESPACE DMS01I MANAGED BY DATABASE

USING (FILE ‘C:\DMS\MUSICKEG\DMS01I’ 48)

EXTENTSIZE 4 PREFETCHSIZE 4

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IBM Software Group

© 2005 IBM Corporation29

Table Space Using GUI

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IBM Software Group

© 2005 IBM Corporation30

Table Space Using GUI (2)

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IBM Software Group

© 2005 IBM Corporation31

Table Space Using GUI (3)

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IBM Software Group

© 2005 IBM Corporation32

Table Space Using GUI (4)

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IBM Software Group

© 2005 IBM Corporation33

Command Editor

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IBM Software Group

© 2005 IBM Corporation34

Visual Explain

Page 35: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation35

Visual Explain

Page 36: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation36

Task Center

Page 37: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation37

Journal

Page 38: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation

RECOVERY

Page 39: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation39

Recovery

Defining logs

Recovery of database

Recovery of a table space

Offline versus Online

Page 40: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation40

Database Recovery LOGRETAIN = NO

Database

S0000000.log

S0000001.log

S00000002.log

S0000003.log (Secondary Log)

S0000004.log (Secondary Log)

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IBM Software Group

© 2005 IBM Corporation41

Database Recovery LOGRETAIN = RECOVERY

Database

S0000000.log

S0000001.log

S00000002.log

S0000003.log

S0000004.log

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IBM Software Group

© 2005 IBM Corporation42

Backup

If LOGRETAIN = Recovery you may backup table space or database

If LOGRETAIN = NO you may only backup database

BACKUP DB database-name ONLINE to C:\backup

INCLUDE LOGS

Page 43: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation43

Recovery

If LOGRETAIN = NO, you may only recover the database

If LOGRETAIN = RECOVERY, you may recover a table space or a database from a full database backup

Page 44: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation44

Modes of Recovery Offline

Online

RESTORE DB database-name FROM file TAKEN AT time

ROLLFORWARD DATABASE database-name

TO isotime AND STOP

END OF LOGS

Page 45: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation45

HADR – High Availability Disaster Recovery

Database_standby

Database1

Laptop computer

Page 46: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation

Performance and Tuning

Page 47: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation47

Performance and Tuning

Database Configuration parameters

Database Structure

SQL Statements

Page 48: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation48

Database Configuration parameters

Page 49: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation49

Configuration Parameters

Page 50: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation50

Buffer Pool

Database

Buffer Pool

Select * from Staff

Page 51: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation51

Monitoring Buffer Pool Hit Ratio

db2 get snapshot for bufferpools on database-name

Bufferpool name = IBMDEFAULTBP

Database name = MUSICKEG

Database path = C:\DB2\NODE0000\SQL00002\

Input database alias = MUSICKEG

Snapshot timestamp = 05/04/2005 13:11:37.329018

Buffer pool data logical reads = 336

Buffer pool data physical reads = 129

Page 52: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation52

Sort Heap

Sorts are done in sortheap

If no space for sort data is moved to TEMPSPACEn

GET SNAPSHOT FOR ALL ON database

Page 53: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation53

Package Cache

Dynamic SQL statements

Package Cache

Select * from Staff where ID = 10Select * from Staff where ID = 10

Update Staff Set Salary = Salary + 100 where ID = 10

Select * from EMPLOYEE

Page 54: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation54

LOCK

Locks are held to prevent loss of data

Lock Row / Table / Table Space

LOCKLIST

MAXLOCKS

ALTER TABLE table-name LOCKSIZE TABLE

Page 55: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation55

Show Locks

Page 56: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation56

SQL Statements

Determine which statement is causing the majority of problems

Determine what might be causing the problem

Testing the solution

Page 57: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation57

SQL Activity Monitor

Page 58: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation58

Visual Explain

Page 59: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation59

Table Statistics

Page 60: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation60

Performance Summary

Buffer pools

Numerous Database Configuration parameters

SQL Statement Tuning

Page 61: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation

Security

Page 62: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation62

Security

Security is used at the operating system level

Table access is through the database

Page 63: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation63

Instance Level

SYSADM_GROUP

SYSCTRL_GROUP

SYSMAINT_GROUP

SYSMON_GROUP

Page 64: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation64

GRANT / REVOKE

GRANT access to an object/program

REVOKE access to an object/program

GRANT SELECT ON TABLE ARTISTS TO USER1

Page 65: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation65

Summary

The Relational Database can be simple or complex

The database structure is simple, Table spaces, Tables, etc.

Recovery is straight forward

Database maintenance can be automated

Tuning the database is a life long endeavor

Page 66: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation66

DB2 UDB Proof of Technology

July 12, 13 DB2 UDB Administration Proof of Technology

IBM – McClean Tec

8401 Greensboro Drive

McClean, VA 22102

Suite 120 First Floor

WebSphere Information Integrator July 14, 2005

Contact: Keith E. Gardenhire

[email protected]

Page 67: DB2 UDB - International Informix Users Group

IBM Software Group

© 2005 IBM Corporation67

DB2 UDB Proof of Technology Con’t