8/14/2019 IOUG93 - Client Server Very Large Databases - Presentation

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Building Large Scaleable Client/Server Solutions!

David M. Walker

Technical Leader

Professional Services

Sequent Computer Systems

8/14/2019 IOUG93 - Client Server Very Large Databases - Presentation

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Agenda!

Introduction

Requirements

The Large Scaleable Server

Networking

Backup & Recovery

Conclusion

8/14/2019 IOUG93 - Client Server Very Large Databases - Presentation

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Introduction!

Databases in excess of 10Gb, normally 50Gb+

OLTP with 7 by 24 hour requirement

1000s of enrolled users

100s of concurrent users

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Requirements!

Architecture Led Design

Modular

Resilient

Scaleable

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The Large Scaleable Server!Database Server(multi node cluster)

Batch/Print Server

(two node cluster)

Client Networks

Application

Server

(free standing)

Server Network

(FDDI)

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

The Database Server!Traditional Server

Only Oracle RDBMS running

SQL * Net connections over FDDI

Resilience!! Use OPS for fail over!! Use disk mirroring

Scaleability

!! Use OPS for out of box growth! Modular Application Design Useful

!! Use disk striping

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Application Server!

Two Type

!! Host Based!! Client Based

Clone machines provide resilience and scaleability

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Host Based Application Server!

User logs onto server via telnet

User interface run on Application Server

Thin Clients

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Batch Server!Manages batch queues

May run batch jobs on Application Server or locally

Standardize interface so all products can use it

Resilience options

!! Use database to hold queue!! Cluster aware batch manager!! Use fail over file systems to move queue

Scaleability

!! Design manager to run programs where resource isavailable (e.g. Application or Batch Server)

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Print Server!

Manages system output

Resilience options!! Use database to hold queue!! Cluster aware print manager!! Use fail over file systems to move queues

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Print Server (continued)!

Options

!! Distributed across application servers! Large number of complex queues to manage! Needs intelligent printers! Interferes with application server work! Not very scaleable or resilient

!! Centralized printer server! Single point queue management! Output must be sent to server for queuing which

increases network traffic

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Print Server (continued)!

Options (continued)

!! Hybrid print servers!

Central Queue Manager (CQM)! Local queues on Application Servers address by CQM

only

! Large number of simple queues to manage! No large network file transfers

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Networks!Server Network (FDDI)

!! SQL * Net Traffic between Application Server and DatabaseServer

!! Batch and print requestsClient Networks

!! Users connections to Application ServersSystem Administration Network

!! System Administrators!! Database Administrators!! SNMP MIBs for monitoring

Clusters Networks

!! Low Latency Interconnects for Lock Traffic

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Building Large Scaleable Client/Server Solutions - David M. Walker 13:45

Backup and Recovery!

PLAN & TEST FOR RECOVERY !

Database Server

!! Use Hot & Cold backups!! Use OPBRU where available!! Use resilient media (3480 or 3490)!! Use low capacity media with tape managers

Application, Batch and Print Servers

!! Use standard Configurations!! Keep transient files of separate file systems from staticcode

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Conclusion!

Large Client/Solutions are possible but not easy

Have an architecture and build in a modular fashion

Look for weaknesses in resilience and scaleability

Partner with your vendors - you will need their help