Session: Oracle RAC vs DB2 LUW purescale. Udo Brede Quest Software. 22 nd November :30 Platform: DB2 LUW

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1 Session: Oracle RAC vs DB2 LUW purescale Udo Brede Quest Software 22 nd November :30 Platform: DB2 LUW 1

2 Agenda Marketing Message Clustering/Scalability Technology Overview Basic Components Available Installation Administration and Monitoring Summary 2

3 Marketing Messages purescale RAC (Real Application Clusters) Unlimited Capacity Buy only what you need, add capacity as your needs grow Application Transparency Avoid the risk and cost of application changes Continuous Availability Deliver uninterrupted access to your data with consistent performance 24/7 availability Provide continuous uptime for database applications On-demand scalability Expand capacity by simply adding servers to your cluster Lower computing costs Use low-cost commodity hardware and reduce cost of downtime World-record performance Runs faster than the fastest mainframe 3

4 Marketing Message RAC 4

5 Marketing Message purescale 5

6 Clustering/Scalability: Oracle RAC Application server 1 Application server 2 Application server 3 Node 1 Instance 1 Node 1 Node 1 Instance 2 Instance 3 RAC Database 6

7 Clustering/Scalability: DB2 purescale GBP Group Lock Manager Catalog Log Catalog Log Member 1 PRODDB1 PRODDB2 DBCONFIG BPs DBCONFIG BPs Catalog Log Catalog Log Member 2 PRODDB3 PRODDB4 DBCONFIG BPs DBCONFIG BPs DATA 7

8 Clustering/Scalability: DB2 z/os Data Sharing SYSPLEX Workfile DB Log Member 1 Member 2 DB2A GBP SCA Lock Structure DB2B Workfile DB Log BP BSDS DB2 Catalog BSDS BP DATA 8

9 Technology Overview - RAC Oracle s High Availability Solution RAC is a shared disk clustered database All instances share a common set of database files Many instances sharing a single physical database Many instances of Oracle running on many nodes Each instance in the cluster has it s own SGA and dedicated sessions At any instant, a user session is connected to only one instance All instances having common data and control files Each instance has individual log files and undo segments All instances can simultaneously execute transactions against the single physical database The global cache is the combination of each local buffer cache; it is maintained via a high-speed dedicated network called the cluster interconnect 9

10 Technology Overview - RAC 10

11 Technology Overview - purescale Clients connect anywhere and see single database Clients connect into any member Automatic workload balancing and client reroute may change underlying physical member to which client is connected DB2 engine runs on several host computers Co-operate with each other to provide coherent access to the database from any member Integrated cluster services Failure detection, recovery automation, cluster file system Tivoli SA MP, STG RSCT and GPFS Low latency, high speed interconnect For example InfiniBand network PowerHA purescale technology/cluster caching facility (CF) Efficient global locking and buffer management Synchronous duplexing to secondary ensures availability Data sharing architecture Shared access to database Members write to their own logs on shared disk Logs accessible from another host (used during recovery) 11

12 Technology Overview - purescale 12

13 Basic Components Node Cache Fusion Global Cache RAC LMON/Global Enqueue Service Monitor Fast Application Notification (FAN) and Transparent Application Failover (TAF) Global Database Cluster Interconnect Grid Infrastructure Global Filesystem, Cluster File System, Automatic Storage Management (ASM) 13

14 Basic Components purescale Member Coupling Facility Group Bufferpool (GBP) Global Lock Management (GLM) Shared Communication Area (SCA) PowerHA purescale Server Cluster Interconnect DB2 Cluster Services General Parallel File System (GPFS), Automatic Storage 14

15 Basic Components of DBMS Oracle Instance File Database Tablespace Schema Table Index View Trigger Rollback Segment Stored Procedures SQL Plus Packages DB2 LUW Instance Container Database Tablespace Schema Table Index View Trigger NA Stored Procedures DB2 CLP Modules 15

16 Different Terms - Similar Meaning Data Guard Package Data Block Dictionary Alert Log Redo Log Archive log Segments Oracle Statement Cache System Global Area (SGA) HADR Module (9.7) Data Page Catalog Diag log Log Files DB2 LUW Archival Logging Space Consuming Objects Package Cache Instance shared memory / DB shared memory 16

17 Instance & Database Oracle Instance A collection of Processes One data dictionary one active database Init.ora parameter file Instance DB2 Logical database server environment Also referred to as a Node 1 to many databases Database Manager Configuration File 17

18 18 Instance DB2 D B M C O N F I G D B M C O N F I G Instance_1 PRODDB1 Catalog DBCONFIG Log Catalog Log DBCONFIG PRODDB2 BP s BP s Instance_2 TESTDB1 Catalog DBCONFIG Log Catalog Log DBCONFIG TESTDB2 BP s BP s SID Oracle Database Control files Data files Redo log files Data Dictionary

19 Product Options Oracle Express Edition 1 CPU/1GB RAM 4 GB max DB size Windows/Linux only Standard Edition 4 sockets Unlimited scalability RAC (but only with ASM) Enterprise Edition Unlimited scalability Table Partitioning RAC DB2 Express-C 2 CPU/2GB RAM Windows/Linux/Solaris/Mac Express Edition 4 CPU/ 4GB RAM max Workgroup Edition 4 CPUs/ 16 GB RAM Enterprise Server Edition Unlimited scalability Data partitioning (DPF) purescale 19

20 Basic Components purescale Shared Disk Architecture RAC Shared Everything Architecture 20

21 Available Oracle RAC Platform Linux (also z/linux!) Unix (Aix, HP UX, Solaris) Windows network/database/clustering /overview/index.html Please check: Network Server Cluster Storage DB2 purescale Platform AIX Linux ocenter/db2luw/v9r8/index.jsp Please check: Network Server Cluster Storage 21

22 Overview of Install steps of RAC 22

23 Install Steps of RAC Oracle Clusterware runinng by Cluster Ready Services (CRS) Oracle RAC installation Virtual Internet Protocol Configuration Assistant (VIPCA) Running the Oracle Net Configuration Assistant (netca) Database Configuration Assistant (DBCA) 23

24 Overview of Install steps of purescale 24

25 Install Steps of purescale Installing DB2 ESE purescale 9.8 Setup Instance Set User Information (instance owner, fenced user) DB2 Cluster File System Host List Cluster Caching Facility 25

26 Administration and Monitoring of RAC Command line Oracle Enterprise Manager Grid Control 3rd party vendors 26

27 Administration and Monitoring of purescale DB2 commands IBM Optim 3rd party vendors 27

Summary Oracle or DB2 LUW or both: DB2 Compatibility Vector enable Oracle Compatibility Features (db2set DB2_COMPATIBILITY_VECTOR=ORA) With DB2 9.

28 Summary Oracle or DB2 LUW or both: DB2 Compatibility Vector enable Oracle Compatibility Features (db2set DB2_COMPATIBILITY_VECTOR=ORA) With DB2 9.7 most Oracle data types are available PL/SQL is available also for DB2 LUW since 9.7 Oracle RAC and DB2 purescale Migration tools and support are available (MEET DB2, Data Movement Tool, ) 28

29 Before you go for it: There are some Restrictions for purescale InifiniBand network requirement Limited OS support (AIX, Linux) Only one database is allowed per instance No HADR support Several system table functions are not supported REORGCHK_TB_STATS REORGCHK_IX_STATS No support for data partitioned tables 29

30 Session Oracle RAC vs DB2 LUW purescale Udo Brede Quest Software 30

Achieve Breakthrough Performance and Availability with DB2 purescale

Achieve Breakthrough Performance and Availability with DB2 purescale Philip K. Gunning Gunning Technology Solutions, LLC Session Code: D01 May 3, 2011 12:45 1:45 PM Platform: LUW Building the case for