Using Oracle Workspace Manager to Cut Costs:

Case StudiesBill Beauregard

Principal Product Manager

Oracle Corporation

Session id: 40081

Agenda

Workspace Manager Overview Case Studies

– City of Edmonton– Operational Data Store for a Major HMO

Workspace Manager

– Isolate a collection of changes to production data– Keep a history of changes to data– Perform “what if” analysis

Saves Money, Time and Labor

Feature of the Oracle Database for application developers and DBAs

Manages current, proposed and historical values for data in the same database

How it Benefits Users Saves Money

– City of Edmonton consolidated 49 physical asset databases into one database

– HMO cut hardware requirements by 50% and software licensing for a half terabyte data store

Saves Time– Concurrent access to current, proposed and

historical data with consistency and no latency Saves Labor

– Single point of update and management– Easy to manage with Enterprise Manager – No custom code or application specific version data

Workspace Manager Architecture

MetadataViews

WORKSPACE-ENABLED APPLICATIONS

Data Mgmt.

Privilege Mgmt.

Lock Mgmt.

ConflictMgmt.

WORKSPACE MANAGER

RDBMS

WS Mgmt.

PL/SQL APIs SQL

Workspace Manager Mechanics Workspace logically isolates a collection of row versions

Workspaces hierarchies can be of any depth and width

Row versions created within a version-enabled table

No changes to application SQL or queries

View workspace versions in context of rest of database

11 22 33

4455

66

77Workspace BWorkspace B

Workspace CWorkspace C

Workspace DWorkspace D

LIVE WorkspaceLIVE Workspace

88 99Workspace EWorkspace E

SavepointSavepoint

Workspace Manager Mechanics Savepoint groups collection of changes in a workspace

Savepoint allows rollback by causing subsequent row changes to be automatically captured as a new version

Automatic conflict detection – resolve to parent, child, original

Optional history enables “goto date” navigation

11 22 33

4455

66

77Workspace BWorkspace B

Workspace CWorkspace C

Workspace DWorkspace D

LIVE WorkspaceLIVE Workspace

88 99Workspace EWorkspace E

SavepointSavepoint

Version-Enabling a TableDBMS_WM.ENABLEVERSIONING('CATALOG');

CATALOG:base table

CATALOG_LT:Renamed basetable with fournew columns

CATALOG:view with instead-of triggers

UPDATE catalog SET . . .

RENAME…

Workspace Manager Operations

Table: EnableVersioning, DisableVersioning

Workspace: create, refresh, merge, rollback, remove, goto, compress, alter

Savepoints (persistent): create, alter, goto

History: goto date

Privileges: access, create, delete, rollback, merge

Access Modes: read, write, management, none

Locks (persistent): exclusive and shared

Differences: compares savepoints and workspaces

Detect / Resolve Conflicts: choose version to merge

Use PL/SQL APIs and Enterprise Manager

Code Sample--Version enable the PERSONNEL table with history and timestamp all changes

DBMS_WM.EnableVersioning('PERSONNEL', Hist=>'VIEW_WO_OVERWRITE');

-- Create a workspace called PERSONNEL_UPDATES dbms_wm.createWorkspace('PERSONNEL_UPDATES');

-- Go to workspace PERSONNEL_UPDATES and update

dbms_wm.gotoWorkspace('PERSONNEL_UPDATES');update PERSONNEL....

Code Sample (Continued)

-- Create a savepoint called POTENTIAL_CHANGES in the PERSONNEL_UPDATES workspace & make more changes dbms_wm.CreateSavepoint('PERSONNEL_UPDATES', ‘POTENTIAL_CHANGES'); update PERSONNEL....

-- Undo the last set of changes dbms_wm.RollbackToSP('PERSONNEL_UPDATES','POTENTIAL_CHANGES');

Code Sample (Continued)

-- Merge changes into LIVE (production) Workspace and remove the workspace PERSONNEL_UPDATES

dbms_wm.gotoWorkspace('LIVE');

dbms_wm.MergeWorkspace('PERSONNEL_UPDATES', remove_workspace => true);

-- Disable versioning on the PERSONNEL table dbms_wm.DisableVersioning('PERSONNEL');

Workspace Manager Features Workspace hierarchies of arbitrary depth & width No changes to application SQL or queries Optimistic and pessimistic locking modes Continually Refreshed (CR) and non-CR workspaces Multi-Parent Workspaces Persistent workspace locks Differencing and Conflict detection/resolution Partial and Full Merge/Refresh of workspace/table Garbage collection operations to keep the

version-tree/version-data sizes optimal Event framework

Database Integration

Manage via Enterprise Manager & metadata views Supports Oracle Spatial Supports all datatypes (including nested tables) DDL operations on version-enabled tables Constraints (Referential Integrity, Unique, Check) Triggers Import / Export (full and table) SQL*Loader bulk loading Replication VPDs Materialized Views (full refresh)

Case Study: City of EdmontonSpatial Land Inventory Management System provides a

single mgt. environment for city’s land based assets

Application platform: – Oracle Workspace Manager and Oracle Locator– Intergraph GeoMedia Pro, GeoMedia Transaction Manager.

Data feeds: – Land registry and surveys– Utilities and phone co.– Tax assessments– Dept. of Public Works

City of Edmonton (continued) Users:

– 1000’s of end users - city officials, departments, mortgage lenders, citizens

– 150 professionals - Engineers, planners, cartographers

– 50 data entry personnel

Client access: – Internet, mobile and thick client tools

Database: 30gb and growing

SLIM Data Legal Survey parcels Assessment parcels Title parcels Civic holdings Parkland Assets Zoning and Land Use Underground utilities Street Lights and Trolley Addresses Single Line Street Network Sidewalk structure/condition Road structure/condition Buildings, entryways Demographic data

Administrative areas such as: Community leagues Neighbourhoods Wards Voting subdivisions Business Revitalization Zones Residential parking program Neighbourhood structure plans Area structure plans Inspection areas Traffic districts / zones Major commercial corridors

StatisticsLand Parcel related tables Title / Assessment / Civic Properties

– 197,297 current records– 891,274 historic records

Title related information– 928,182 current owners– 1,251,509 historic owner records

Legal Descriptions (Lot / Block / Plan)– 817,027 current– 1,692,009 historic

StatisticsAddress related tables Addresses

– 395,243 current– 1,175,994 historic

Buildings / Floors / Entryways / Suites– 908,012 current– 1,066,799 historic

Assessment– 182,943 current– 205,311 historic

StatisticsStreet Lights - just starting to maintain

– 49,460 Poles– 89,641 Luminaires– 46,948 Hardware items

Future data– Additional Parkland Assets– Bus Stops– Scanned Roadways As-Built images– Traffic Signals– Street Markings– Parking Meters– and more…..

Pre-SLIM Environment

Data duplication was common

Data was maintained in multiple data formats

Quality of data was inconsistent

Currency of data was often a problem

Some required data did not exist

Limited historic data

Requirements Single, centralized data store Store data in three states:

• Proposed • Current• Historical

Maintain audit trail for data maintainers Maintain historical and proposed states for

business users

Workspace Manager in Production Data maintainers

– Create workspaces to isolate changes– Merge workspaces when changes are completed and approved

112 version enabled tables Referential constraints and triggers used heavily Average 75 workspaces in use Average rows merged at a time

– Registries data load - 13 tables - 8800 rows– Addressing - 5 tables - 80 rows– Parcel Maintainers - 2 tables - 140 rows

Results Integrated, centralized, high quality data

– Replaced 49 disparate land apps., 166 databases– Single point of update and management– Citywide sharing of consistent data with controlled

access

Concurrency and historical perspective– Concurrency: end users access current data while

data entry and updates are isolated in workspaces– History: all changes retained,“goto date” capability

Case Study: Operational Data Store

A major HMO is building an ODS to:

Support key operational business processes

Aggregate transaction processing data from multiple legacy applications

Provide subject-oriented, integrated, near realtime, detailed data for a number of financial applications and reports

Requirements

Daily/ weekly / monthly snapshots of 500 GB Oracle9i Database

(Hardware has 1TB storage limit)

Load 60 MB (120,000 transactions) per hour

No changes to application SQL or queries

Two Alternatives

Multiple staging instances with refresh – Requires new hardware & software licenses– More labor– No availability during refresh– Stale data – refresh done infrequently– Cumbersome if additional snapshots required

Single instance hosts current & historical data – Same hardware and software licenses– Data added in near real time – High availability – Better operational decision making– Scalable – easy to add a new workspace

Solution – Workspace Manager

Data loaded in LIVE (current state of the data) 3 workspaces created to provide historical views

– Daily = COB previous day – Weekly = end of the previous week– Monthly = end of the previous month

Workspace Refresh updates the workspace with the latest data

Workspace Compress removes old versions from LIVE

Results

50% less hardware and corresponding software licenses required

One copy of the data to manage

Data updates are near realtime and available

No changes to application SQL and queries

Refresh is very fast because it is a metadata operation

Summary

Workspace Manager…. Saves Money

– Reduces hardware and software requirements Saves Time

– Concurrent access to current, proposed and historical data with consistency and no latency

Saves Labor– Single point of update and management– Easy to manage with Enterprise Manager – No custom code or application specific version data

Next Steps….

Recommended sessions– # 40125 - Oracle10i: A Spatial VLDB Case Study

Recommended demos and/or hands-on labs– Performing Location-Based Analysis with Oracle Locator or

Oracle Spatial, and Oracle Workspace Manager (Database Track)

See Your Business in Our Software– Visit the DEMOgrounds for a customized architectural

review, see a customized demo with Solutions Factory, or receive a personalized proposal. Visit the DEMOgrounds for more information.

Visit http://otn.oracle.com/products/workspace_mgr

Reminder – please complete the OracleWorld online session survey

Thank you.

AQ&Q U E S T I O N SQ U E S T I O N S

A N S W E R SA N S W E R S