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If You Want to Have your Database Sing on Key, Then You Need to Get It Tuned Bryan Dickerson, Woolpert Jim Moening, ESRI Agenda How Does ArcSDE Work? Database Tuning (Oracle and SQL) Best Practices for Geodatabase Design ArcSDE Management Roles & Responsibilities Database Tuning Water/Wastewater DB Design Conference February 2005 How Does ArcSDE Work? Database Tuning Water/Wastewater DB Design Conference February 2005 ArcSDE Data Storage A feature class (layer) is comprised of 3 tables in an ArcSDE database Business table Feature table Spatial index table Database Tuning Water/Wastewater DB Design Conference February 2005 Business Table Contains attributes and a spatial column Spatial column is a key used to relate to the feature and spatial index tables SHAPE OBJECTID 1 NAME 1 FID … 1 Spatial Index table Main St AREA … SP_FID 1 … … LEN POINTS 0 926.45 GX GY 7 Business table (Roads) 12 Feature table (F1) EMINX EMINY 786 840 EMAXX EMAXY 339 (S1) Database Tuning Water/Wastewater DB Design Conference February 2005 374 Feature Table Stores geometry including annotation and CAD features Also stores attributes describing the geometry such as Area and Length SHAPE OBJECTID 1 NAME 1 FID … 1 Spatial Index table Main St AREA … SP_FID 1 … … LEN POINTS 0 926.45 GX GY 7 Business table (Roads) 12 Feature table (F1) EMINX EMINY 786 840 EMAXX EMAXY 339 (S1) Database Tuning Water/Wastewater DB Design Conference February 2005 374 Spatial Index Table Defines the grid range for each feature Defines the shape envelope for each feature SHAPE OBJECTID 1 NAME 1 FID … 1 Spatial Index table Main St AREA … SP_FID 1 … … LEN POINTS 0 926.45 GX GY 7 Business table (Roads) 12 Feature table (F1) EMINX EMINY 786 840 EMAXX EMAXY 339 (S1) Database Tuning Water/Wastewater DB Design Conference February 2005 374 ArcSDE Storage Model Spatial column 2 2 3 SHAPE 1 3 1 2 F34 FID 2 1 1 CENSUS_TRACTS Coordinate Information Business table 1 POINTS . . . . . xy,xy,xy 2 .SP_FID . . . . xy,xy,xy GX GY 3 1 . . . .1. xy,xy,xy S34 1 2 1 1 3 1 1 Feature table stores geometry 2 1 2 Spatial index table stores grid tiles and envelopes 3 1 2 1 2 1 Tables join on integer Feature ID column 2 2 1 Database Tuning Water/Wastewater DB Design Conference February 2005 Spatial index Spatial index is used to improve performance of data retrieval IBM DB2, Oracle, and SQL Server use grid tiles Goal Optimize the size of the grid tiles Balance Number of features referenced by each tile (features per tiles) Number of tiles referencing each feature (tiles per feature) Informix and Oracle Spatial use R-tree indexing R-tree index constructs the index using the feature envelope Do not need to add any parameters for building R-tree (built automatically) Database Tuning Water/Wastewater DB Design Conference February 2005 Reducing Work With a Spatial Index Clients use a spatial filter to reduce query results and speed up data retrieval Example: Only fetch visible features for display Spatial filter ArcSDE uses spatial index to reduce I/O Eliminates need for full table scan Same principle as RDBMS column index Database Tuning Water/Wastewater DB Design Conference February 2005 Spatial Index Spatial index uses the envelope (bounding box) of the features for fast searching 38,68 53,28 49.5,53.6 49,25 32,64 Envelopes for area and line features use min x,y and max x,y coordinates. The envelope for a point is the actual x,y coordinate. Database Tuning Water/Wastewater DB Design Conference February 2005 Grid Tile Spatial Index Components 49 Parcels Example 48 73 74 75 76 77 Grid tiles Two numbers in indexed columns Shape envelope Two coordinates (four numbers) in indexed columns Shape Many coordinates in binary column A Database Tuning Water/Wastewater DB Design Conference February 2005 How the Grid Tile Spatial Index Works Goal: Avoid reading shapes for entire layer (full table scan) Four stages of elimination 1. 2. 3. 4. FILTER (SELECTION SHAPE) tile envelope shape shape Database Tuning LAYER tile envelope envelope shape Water/Wastewater DB Design Conference RDBMS ArcSDE server or client February 2005 Selecting a Spatial Index Size Size tiles based on average feature envelope Grid tile size too small S-table is too big Many tiles referencing one feature Grid 3x feature envelope S-table smaller Fewer tiles referencing one feature Many rows take longer to search Many tiles referencing one feature inefficient Balance tiles per feature against feature per tile Database Tuning Water/Wastewater DB Design Conference February 2005 ArcSDE Command Line Tools Are Your Friend sdelayer -o si_stats -l Parcels,shape -i esri_sde -s jayhawk -D demo ArcSDE 8.2 Build 967 Thu Feb 28 22:31:11 PST 2002 Layer Administration Utility ----------------------------------------------------Layer 6 Spatial Index Statistics: Level 1, Grid Size 1326.14 |-------------------------------------------------------------------| | Grid Records: 6438 | | Feature Records: 5099 | | Grids/Feature Ratio: 1.26 | | Avg. Features per Grid: 55.03 | | Max. Features per Grid: 181 | | % of Features Wholly Inside 1 Grid: 81.64 | |-------------------------------------------------------------------| | Spatial Index Record Count By Group | | Grids: <=4 >4 >10 >25 >50 >100 >250 >500 | |---------- ------ ------ ------ ------ ------ ------ ------ ------ | | Features: 5073 26 8 0 0 0 0 0 | | % Total: 99% 1% 0% 0% 0% 0% 0% 0%| |-------------------------------------------------------------------| Database Tuning Water/Wastewater DB Design Conference February 2005 Spatial Index Tile Size Considerations Optimal size varies by average feature envelope Recalculate index if feature class changes Most feature envelopes should not exceed grid size S-table becomes too large Features are referenced by many tiles which is inefficient Use multiple resolutions (multiple grids) for feature classes with highly-variable feature sizes Database Tuning Water/Wastewater DB Design Conference February 2005 Making Data Editable - Register As Versioned Performed by data owner in ArcCatalog Two tables are added to feature class Additions table Deletions table Database Tuning Water/Wastewater DB Design Conference February 2005 How Tables React to Edits Business table SHAPE ID 1 2 Name Roma Palm Inserting Adds table SHAPE Deletes table ID 3 Deleting Name Citrus Adds table SHAPE Deletes table ID 3 Name Citrus Adds table Updating SHAPE ID 2 Deletes table ID 3 1 Database Tuning ID Name Citrus Roma ID 2 1 Water/Wastewater DB Design Conference February 2005 Raster Data Storage Raster data is stored in a similar fashion to vector data 4 tables are used to reference a raster feature class Business table Raster bands table (stores bands for each image) Raster auxiliary table (stores metadata for each raster band) Raster blocks table (stores the actual raster in a tiled format) Blocks table is most important as it is by far the largest Database Tuning Water/Wastewater DB Design Conference February 2005 Pyramids Pyramids can be built for a raster layer when loaded into ArcSDE Multiple resolutions of the raster layer are stored in the database At a zoomed out scale the lower resolution is displayed As the user zooms in to the highest level of detail, the raster as it was originally loaded (its highest resolution) is shown This significantly helps to speed display of raster layers in ArcGIS and ArcIMS Database Tuning Water/Wastewater DB Design Conference February 2005 Raster Blocks Table (SDE_BLK_1) Raster is divided into tiles containing many pixels and each tile is a row in the table Each tile at each pyramid level has a row in the table This table WILL get very large! RASTERBAND_ID RRD_FACTOR 1 Database Tuning ROW_NBR 0 COL_NBR 1 Water/Wastewater DB Design Conference BLOCK_DATA 2 February 2005 Database Tuning for Oracle and SQL Database Tuning Water/Wastewater DB Design Conference February 2005 Query Response Time When the client submits a query, the server must: Analyze query statement Fetch data Transfer results to client over network 2 biggest performance factors are network and disk I/O Network I/O is database independent Scanning large tables increases disk I/O Fetching and transmitting large results increases disk and network I/O Database Tuning Water/Wastewater DB Design Conference February 2005 Network I/O T1 line connecting a remote office to an ArcSDE database in a headquarters office can be tied up with one ArcGIS desktop performing normal operations Solution to this is terminal emulation software such as Citrix or Terminal Server Database Tuning Water/Wastewater DB Design Conference February 2005 SQL Server Basics Terminology is different than that for Oracle A SQL Server instance is made up of many databases SQL Server databases are a logical container for objects such as: Users Roles Tables Etc… Database Tuning Water/Wastewater DB Design Conference February 2005 SQL Server Database A SQL Server database is comprised of data files and log files A database has, at minimum, one data file and one log file Database Data file Database Tuning Log file Water/Wastewater DB Design Conference February 2005 SQL Server File Groups There can be multiple data files and log files and these can be stored in different places A group of data files and/or log files is called a file group Database File group Data file Database Tuning Data file Log file Log file Water/Wastewater DB Design Conference February 2005 Oracle Basics Terminology is different than that for SQL Server An Oracle database is made up of many table spaces A table space can be made up of many data files. Also need to be aware of redo log files and control files Table spaces are logical containers for objects such as: Tables Stored procedures Roles and users are stored at the database level and not the table space level Database Tuning Water/Wastewater DB Design Conference February 2005 DBTune File/Table Actually exists as a table in the SDE database or table space Contains storage parameters for tables and feature classes Whenever a new feature class is created and data is loaded, the ArcSDE server process reads the DBTune table for information on how to store these new objects There can be different parameters for different layers or data types and these are specified via keywords Database Tuning Water/Wastewater DB Design Conference February 2005 Storing Layers in the SDE Database (SQL) or Table Space (Oracle) Do not store layers in the SDE database or table space Leave the SDE database or table space for ArcSDE application use (managing what layers are where, versioning, etc.) Otherwise this can significantly slow down data retrieval as this database or table space will become large Database Tuning Water/Wastewater DB Design Conference February 2005 Multiple Database Logins Do not have all your editors in your organization use the same login Each database user has a log table in the SDE database or table space that tracks a user’s actions If all users use one login, all their actions will write to one table and this table will grow very large very fast Doing this also prohibits from restricting user access on a layer by layer basis Database Tuning Water/Wastewater DB Design Conference February 2005 Disk I/O Contention This is the number one way to slow down an ArcSDE database As users view or query data remember that, at minimum, ArcSDE is working through the business tables, feature tables, and spatial index tables for each layer in the map If the layers are versioned, ArcSDE is also working through the adds and deletes tables Database Tuning Water/Wastewater DB Design Conference February 2005 Preventing Disk I/O Contention Use many disks and spread the tables and logs across those disks In SQL Server, make use of file groups and spread the data and log files across different physical disks In Oracle, make use of different table spaces and store the different tables (business, feature, and index) in the different table spaces on the different disks Database Tuning Water/Wastewater DB Design Conference February 2005 Example SQL Server Configuration Disk 1 Operating System Pagefile ArcSDE Software Disk 3 SQL Server Software System database SDE database Business table file group Disk 2 Disk 4 Feature table file group SDE Transaction log Raster table file group Spatial index file group Database Tuning Water/Wastewater DB Design Conference February 2005 Example Oracle Configuration Disk 1 Disk 3 Operating System Pagefile/Swap space ArcSDE Software Oracle Software Business table space Primary control files Disk 2 Disk 4 Redo log Raster table space Spatial index table space Secondary control files Feature table space Database Tuning Water/Wastewater DB Design Conference February 2005 Disk I/O - RAID RAID = Redundant Array of Independent (or Inexpensive) Disks Different levels of RAID RAID 0 = Striping. Data is striped across drives. Offers good performance but no fault tolerance. RAID 1 = Mirroring. Data is written or mirrored to a second disk. Simple fault tolerance and performs better than a single disk. RAID 5 = Striping w/ parity. Data is striped and parity calculations are distributed among disks. Provides good READ performance and excellent fault tolerance. RAID 0 + 1 = Mirroring and striping. Excellent read/write performance and good fault tolerance. Database Tuning Water/Wastewater DB Design Conference February 2005 Other Things You Can Do… Reduce amount of data processed for faster queries Provide a filter to limit number of rows Index tables and layers to reduce searching If you know users will search or query on particular fields, index those fields ahead of time. ArcSDE is fastest for small, indexed queries!!! Database Tuning Water/Wastewater DB Design Conference February 2005 ArcSDE Performance Tuning Optimize Workflow •Data Loading •Data Maintenance •Reconcile/Post/Compress Database Configuration •Keep it simple •Increase default cache sizes Collect Performance Stats •Establish baseline •Use for performance validation Index Management •Regularly rebuild indexes Database Design •Cost of complex data models •While Editing •Recursive Relationships •Feature linked annotation •Types of labels Monitor Table Statistics •Adds and Deletes tables •SDE.state_lineages, states Editing Operations •Use of edit cache is CRITICAL Versioning Methodology •Reconcile performance costs •Using versioning to model history or alternatives •Reconcile/post/compress procedures A good DBA is ESSENTIAL! Database Tuning Water/Wastewater DB Design Conference February 2005 Tools for Managing ArcSDE Databases Database vendor provided tools SQL Server Enterprise Manager SQL Server Query Analyzer Oracle DBA Studio ESRI provided tools ArcCatalog ArcSDE command line tools Other tools StorageVisitron (available from ArcScripts) Version Manager ArcObjects sample (Developer Kit) Database Tuning Water/Wastewater DB Design Conference February 2005 Excellent Instructor-led Classes ArcSDE Administration for SQL Server ArcSDE Administration for Oracle System Architecture Design for GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Best Practices for Geodatabase Design Seamless Data Structure Topology Integrity: Domains, Subtypes, Relationship classes Geodatabase Custom features Disconnected Editing* Versioning* Multi-User Editing* Scalability* *ArcSDE Geodatabase (Enterprise) Database Tuning Water/Wastewater DB Design Conference February 2005 support.esri.com – Project Center Database Tuning Water/Wastewater DB Design Conference February 2005 support.esri.com – Project Center (cont.) Database Tuning Water/Wastewater DB Design Conference February 2005 Database Design Database Tuning Water/Wastewater DB Design Conference February 2005 Data Design Planning Database Tuning Water/Wastewater DB Design Conference February 2005 Geodatabase Database Tuning Water/Wastewater DB Design Conference February 2005 Data Models Tips and Tricks Database Tuning Water/Wastewater DB Design Conference February 2005 Steps to designing geodatabases Conceptual Design Identity the information products to be produced with your GIS. Identify the key thematic layers based on your information requirements. Specify the scale ranges and spatial representations for each thematic layer. Group representations into datasets. Database Tuning Water/Wastewater DB Design Conference February 2005 Steps to designing geodatabases Logical Design Define the tabular database structure and behavior for descriptive attributes. Define the spatial properties of your datasets. Propose a geodatabase design. Database Tuning Water/Wastewater DB Design Conference February 2005 Steps to designing geodatabases Physical Design Implement, prototype, review, and refine your design. Design work flows for building and maintaining each layer. Document your design using appropriate methods. Database Tuning Water/Wastewater DB Design Conference February 2005 Best Practices The schema design phase of your geodatabase implementation is critical to the ultimate performance of your GIS system. Geodatabases can contain feature datasets, feature classes, relationship classes, geometric networks, topologies, feature-linked annotation, and other specialized abstractions. Careful consideration of the cost, limitations, and true purpose of each of these abstractions is required to avoid creating a geodatabase that may not perform well in either a single- or multi-user environment. Database Tuning Water/Wastewater DB Design Conference February 2005 Best Practices – Feature Datasets A feature dataset is a container for feature classes that share the same spatial reference, along with relationship classes, geometric networks, and topologies. Feature classes edited together in ArcMap can be grouped into feature datasets Feature classes not typically edited together should be segregated into separate feature datasets or geodatabases Feature classes that participate in a geometric network or topology must be grouped in the same feature dataset. Feature classes can participate in no more than one topology OR geometric network. Database Tuning Water/Wastewater DB Design Conference February 2005 Best Practices – Subtypes Subtypes let you apply a classification system within a feature class and apply behavior through rules. Subtypes are essential to good design because they help reduce the number of feature classes and improve performance. Let you control every configurable behavior: Attribute rules Relationship rules Network Connectivity Rules Topology Rules Reduce the number of feature classes by creating collections of features within a single feature class Database Tuning Water/Wastewater DB Design Conference February 2005 Best Practices – Relationship Classes Use relationship classes for referential integrity persisted in the geodatabase, on-the-fly relates for editing performance, and joins for labeling and symbology. Messaging occurs between related objects when querying or editing these objects. This incurs overhead in the application. Composite relationship require more messaging, and thus more overhead, than simple relationships. Relationships can only be defined between objects in the same geodatabase. Still requires a join for SQL query, labeling, or symbology. When modeling spatial relationships, you will gain efficiency in your data creation and maintenance procedures by first thinking about how to use geodatabase topologies, geometric networks, shared-edge editing, and geospatial operators in your data model before resorting to relationship classes. Database Tuning Water/Wastewater DB Design Conference February 2005 Best Practices – Geometric Networks A geometric network is a system of edges (lines) and junctions (points) that convey objects. They are a mechanism to represent connectivity between edges and junctions where they connect. Geometric networks provide fast network tracing capabilities and maintain connectivity during editing. The maintenance of the logical network adds overhead to editing and version management. The greater number of feature classes participating in a network, the greater amount of overhead will be incurred in maintaining the logical network and connectivity during editing. Database Tuning Water/Wastewater DB Design Conference February 2005 Best Practices – Topologies A geodatabase topology lets you accurately model geometric relationships between features. Topology can be considered a special type of relationship among features. Your data model will be more efficient if you can associate features by topology rather than with a relationship class. But remember that a feature class cannot participate in a topology and a geometric network at the same time. Topologies manage a set of rules and errors associated with the violation of the rules. A geodatabase topology can incur editing overhead and work flow considerations. The greater number of feature classes and rules in a topology, then greater amount of overhead for the management of the rules and errors within a topology. Database Tuning Water/Wastewater DB Design Conference February 2005 Best Practices – Annotation and Labeling Choosing whether to cartographically edit or automatically place text is an important decision. It depends on the quality of source data, how much effort is to be expended, and the desired map quality. Feature-linked annotation Simple annotation Labels Annotation class joined in composite relationship with feature class. Standalone annotation class. Text properties, such as font and size, and a labeling field, defined in an ArcMap layer. Framework Geodatabase data model Geodatabase data model ArcMap document or layer property Typical uses Fine cartographic placement of annotation with attribute-based text. Fine cartographic placement of annotation with fixed text. When text values are attribute values that can be placed automatically on the map. Composite objects Yes No No Referential integrity Yes No No Pros The composite relationship lets you update, move, or delete annotation when features are edited. Simple annotation lets you place fixed text with a high degree of control. Labeling features is a quick and easy way to add descriptive text to your map. Cons Adds editing overhead; requires more work than labeling. Requires more work than labeling; text values cannot be updated automatically if attributes change. While labels will not collide with each other, cartographic placement is rough. Recommendations Use feature-linked annotation for text, such as street names, building numbers, and gages. Use simple annotation for static text or text describing large or indeterminate areas. Use labeling for quickly placing descriptive text, such as addresses or measurements. Definition Database Tuning Water/Wastewater DB Design Conference February 2005 Best Practices – Design Tips Build on your existing GIS designs Most existing designs are suitable for moving forward. You can build on what has worked in the past and find new capabilities than can improve efficiency. Use generic geodatabase types when feasible Combining generic data structures with rich GIS tools provide the best solutions to scale and support multiple users and applications. Leverage the ArcGIS software logic as much as possible and only use customized GIS data structures as a last resort. Integrate independent feature classes using topology Many users will find opportunities to use topologies in the geodatabase. This can create significant increases in efficiency for customization, data maintenance, and user productivity. Database Tuning Water/Wastewater DB Design Conference February 2005 Best Practices – Design Tips Combine GIS design concepts with traditional relational database design methods Both RDBMS and GIS design methodologies are critical for good GIS design. One is not sufficient without the other. Learn to use and apply both techniques. Prototype and pilot your geodatabase design Prototyping a design using personal geodatabases, ArcMap, and ArcCatalog is a very effective option for creating an efficient design process. During the final stages of design, you will want to test scalability and work flows that represent the work your organization will perform. Use this activity to make final adjustments to your design as necessary. Database Tuning Water/Wastewater DB Design Conference February 2005 ArcSDE Management Roles & Responsibilities ArcSDE RDBMS Database Tuning Water/Wastewater DB Design Conference February 2005 support.esri.com - Project Center Database Tuning Water/Wastewater DB Design Conference February 2005 support.esri.com - Project Center (cont.) Database Tuning Water/Wastewater DB Design Conference February 2005 Project Center - Skill Development Database Tuning Water/Wastewater DB Design Conference February 2005 ArcSDE Management Roles & Responsibilities The following discussion outlines the major roles and responsibilities involved in deploying your spatial data and GIS applications throughout your enterprise. Two Broad Categories for ArcSDE Roles & Responsibilities: Administration Development Database Tuning Water/Wastewater DB Design Conference February 2005 Administration Tasks Database Tuning Water/Wastewater DB Design Conference February 2005 ArcSDE Service Management Responsibility: Manage the ArcSDE service including: Starting and stopping the service Establishing a recovery process, if the service stops Establishing a troubleshooting process Remedy an ArcSDE service that will not restart Fail-over Requirements to do the Job: Must have Administrative or Power User rights on the service host Must have access to the Windows Event Log Must have Administrative access to the DBMS to diagnose database changes or problems Must have knowledge of IT policies and methodologies Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Server Load Management Responsibilities: Monitor and remedy server load Monitor server load or automate the monitoring of the server load Create framework for alerts Diagnose which processes and operations are overloading the server Remedy unnecessary load, like a runaway process Build plan(s) to overcome overloaded server Potentially build fail-over infrastructure of mission critical server Requirements to do the Job: Access to system monitoring tools (e.g. PerfMon, Task Manager) Must have Administrative or Power User rights on the host Must have knowledge of IT policies and methodologies Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 ArcSDE Service Anomaly Management Responsibility: Manage the ArcSDE service if unforeseen troubles occur Requirements to do the Job: Must have Administrative or Power User access to the service host Must have access to the Windows Event Log to diagnose problems Must have access to a technical support group to diagnose and remedy problems Must have Administrative access to the DBMS to diagnose database problems Must have knowledge of IT policies and methodologies Must be able to troubleshoot ArcSDE service anomalies Must be able to understand ArcSDE error logs to help resolve problems Owner: IT or GIS Notes: Timely support required and is part of the criteria for choosing the staff Database Tuning Water/Wastewater DB Design Conference February 2005 Spatial Database Access Responsibilities: Manage access to the spatial database in ArcSDE, including: Create new users to a spatial database Maintain administration user Create a procedure to support ArcSDE/RDBMS standard security (i.e. ArcSDE does not support integrated security) Prepare and enforce procedure to manage ArcSDE clients (e.g. individual logins/roles) Lock down command line administration tools Requirements to do the Job: Must have administrative access to RDBMS to create logins Must have administrative access to RDBMS spatial databases Must have the ability to control the use of the ArcSDE admin tools (e.g. sdemon) Must know how to enforce RDBMS data access Must have knowledge of IT policies and methodologies Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Spatial Database Recovery Responsibility: Establish recovery policy and procedures including: Frequency (incremental, differential) Archive location Versioning Recovery medium (i.e. backup vs. replication) Enforce recovery policy and procedures Automate recovery procedure where practical Requirements to do the Job: Must have administrative access to SQL Server to create and maintain recovery procedure Must know how to create and enforce SQL Server recovery procedures Must have knowledge of ArcSDE layer schema to recover correct database objects Must have knowledge of IT policies and methodologies Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Replicate Spatial Data Responsibilities: Configure ArcSDE replication facilities (e.g. f and s tables) Establish appropriate replication for business needs (e.g. transactional, snapshot, merge) Implement replication needs Requirements to do the Job: Must have administrative access to RDBMS to create and maintain replication configurations Must know how to create and enforce RDBMS replication Must have knowledge of ArcSDE layer schema to replicate correct database objects Must have knowledge of IT policies and methodologies Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Tune ArcSDE Layers Responsibilities: Configure a spatial index for a given layer Measure and monitor the performance of the spatial searches critical to the business needs of the organization (i.e. data maintenance, custom products, general products) Maintain performance and Quality of Service as new spatial applications arrive, data and maintenance grows, and the user base increases Requirements to do the Job: Must know how to adjust a spatial index of an ArcSDE layer Must know how to measure the performance of a spatial search in a given application Must know Quality of Service requirements Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Tune Server and Network Infrastructure Responsibilities: Configure the ArcSDE instance parameters for the ArcSDE server Measure and monitor the performance of the ArcSDE server instance, and the anticipated needs (i.e. data maintenance, custom products, general products, usage growth) maintain performance and quality of service as new users and applications arrive, data and maintenance grows, and the user base increases Requirements to do the Job: Must know Quality of Service requirements Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 ArcSDE Upgrade Management Responsibilities: Ensure ArcSDE service version is up to date, and supports existing and new application functionality Ensure ArcSDE compatibility with applications (i.e. MapObjects, ArcIMS, ArcGIS) Install and configure upgrades to ArcSDE service and its application clients Support and remedy incompatibility issues Implement ArcSDE upgrades (service packs, sdeupgrade) Install and configure upgrades of ArcSDE dependencies (e.g. DBMS, access libraries, operating system) Requirements to do the Job: Must be able to monitor and maintain the versions of ArcSDE and the applications it supports Must be able to monitor and maintain the versions of ArcSDE dependent technologies (e.g. operating system, DBMS, etc.) Must have administrative privileges on ArcSDE server Must have administrative privileges on ArcSDE DBMS Must have knowledge of IT policies and methodologies Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Research Improvements in Data Management Responsibilities: Continually investigate how to improve spatial data management Continually test and scrutinize new spatial data management tools, techniques, and technologies Investigate new data management techniques (e.g. DBMS abstract data types) Investigate new spatial analysis to improve overall the organizations effectiveness Requirements to do the Job: Must have knowledge of common GIS tools, techniques, and modern technologies Must have knowledge of common spatial data maintenance issues and requirements Must have knowledge of common spatial data access issues and requirements Must have knowledge of GIS services and practices Must have a willingness to try new things Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Development Tasks Database Tuning Water/Wastewater DB Design Conference February 2005 Develop Tools and Workflow to Maintain Changes to Spatial Data Responsibilities: Translate related changes in business data to changes in spatial data (e.g. city annexed 2 new parcels) Use the right GIS tool and approach to maintain the spatial data Automate data maintenance where practical Support automation (tools or workflow) Integrate new GIS tools and techniques to maintain the spatial data Requirements to do the Job: Must have knowledge of the functional capabilities of ESRI client applications Must have knowledge of current software engineering policies and methodologies Must have knowledge of GIS policies and methodologies Must have knowledge of GIS discipline (e.g. coordinate systems, topology) Must have knowledge of spatial editing issues (e.g. topology, spatial processing) Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Develop Custom GIS Solutions Responsibilities: Understand and translate specific business need to GIS analysis perspective Identify the right tool and spatial data to deliver that business need Develop spatial solution to satisfy that business need Test spatial solution Deliver or deploy spatial solution Requirements to do the Job: Must have the ability to translate general business needs to spatial processing requirements Must have knowledge of the functional capabilities of ESRI client applications Must have knowledge of current software engineering policies and methodologies Must have knowledge of GIS policies and methodologies Must have knowledge of GIS discipline (e.g. coordinate systems, topology) Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Develop General GIS Applications Responsibilities: Develop GIS application for general business needs (e.g. “show all the hydrants inspected this year on a map”) Test GIS application for general business needs Deploy GIS application for general business needs Maintain GIS application for general business needs Requirements to do the Job: Must have knowledge of the functional abilities and limitations in ESRI client applications (e.g. ArcObjects) Must have knowledge of current software engineering policies and methodologies Must have knowledge of GIS policies and methodologies Must have knowledge of GIS discipline (e.g. coordinate systems, topology) Must have knowledge of IT policies and methodologies Must know how to deploy applications Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Support Deployed GIS Applications Responsibilities: Support users with technical issues about GIS applications (e.g. “help desk”) Maintain the data sources for GIS applications Troubleshoot functional issues of a GIS application Support web based spatial applications (if web based mapping services apply) Requirements to do the Job: Must have the ability to install and uninstall applications and their dependencies Must have knowledge of IT policies and methodologies Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Spatial Data Design Responsibility: Determine the appropriate layout of spatial data layers, including: Organize by entity type (e.g. points, lines, polygons) Organize by functional analysis (e.g. SQL queries) Organize by normalization principles Organize by maintenance (i.e. minimize maintenance effort) Organize by spatial data vendors (e.g. Assessor changes, CAD structure) Requirements to do the Job: Must know spatial data maintenance workflow in detail Must know how the spatial data will be used (i.e. map functionality and products) Must know basic principles of normalization and database objects Must know ArcSDE layer schema Owner: IT or GIS Database Tuning Water/Wastewater DB Design Conference February 2005 Thank you! Questions?
