Texas Nodal Market Implementation Server Consolidation Update ERCOT IT

Texas Nodal Market Implementation Server Consolidation Update ERCOT IT http://nodal.ercot.com TDWG Nodal Update – June 6, 2007 1 Lead from the front Texas Nodal

Nodal is migrating 74 servers to 4 AIX servers We will do this with the minimum disruption We have a plan to: – Minimize the risk – Maximize the benefit – Lower overall costs – Safeguard Market Operations – Improve service levels – Not affect Texas Set 3.0 However, there are always risks to be aware of in server migration We are working with all the project managers and ERCOT committees to reduce risk and to optimize the timing. http://nodal.ercot.com TDWG Nodal Update – June 6, 2007 2 Lead from the front Texas Nodal

Current data center capacity is near maximum Currently operating all data centers near maximum power capacity Computing capacity needs have grown over the past 4 years with each subsequent project implemented Recovered enough data center capacity for the Texas Nodal Market Implementation to date Currently at power threshold in Austin and Taylor Data Centers EMMS production migration complete New equipment is installed along with old equipment and more equipment coming TCC-1 600 TB 234 TB 202 KVA 207 KVA Austin 600 TB 226 TB 180 KVA 180 KVA Criticality is: Taylor Austin New vs. Old Production EMMS Production EMMS Staged decommission in progress Staged decommission in progress Max Storage Capacity Current Level Max Usable Power Current Level Citrix Decommission 6/15 IBM Unix Servers http://nodal.ercot.com TDWG Nodal Update – June 6, 2007 3 Citrix Decommission 6/15 IBM Unix Servers Lead from the front Texas Nodal

Consolidation efforts progressing according to plan Migration Metrics Servers Starting Total Decommissioned Retired % Remaining 74 6 4 86% Databases Starting Total Migrated Retired/ Refresh % Remaining 91 28 26 41% Migrated 28 databases Decommissioned 6 servers Installed temporary storage Completed Application and script review Recovered 20% of previously used storage Applications/Scripts Total Files Reviewed Require Modification % Remaining to Review 229 229 0 0% Database Storage (in GB) Pre-Migration Bytes Used Post Migration Bytes Used Reduction 8,239.3 6,486.2 1,753.1 http://nodal.ercot.com TDWG Nodal Update – June 6, 2007 4 Lead from the front Texas Nodal

Consolidation efforts move in waves of like business systems Market facing migrations begin after Texas Set and continue through October. http://nodal.ercot.com TDWG Nodal Update – June 6, 2007 5 Lead from the front Texas Nodal

Reliability improvements are part of the consolidation effort Oracle Single Node Deployment on Nodal Hardware Oracle Real Application Clustering (RAC) deployment System can recover from multiple component failures (CPU/Memory/Power Supply/ IO) with spare capacity within the system. RAC provides for a complete failover to another physical server in the event of a total failure of the primary server. For redundancy requires duplicate computing resources on two separate physical servers. Provides the ability to balance the load across all applications running on the system. Provides the ability to scale up to the maximum capacity of all systems in the RAC cluster to meet usage demands. Provides the ability to scale up to the maximum capacity of the system to meet usage demands To be implemented with Server Consolidation Project http://nodal.ercot.com TDWG – Nodal Update – June 6, 2007 As proposed in SCR 745 Phase 3 6 Lead from the front Texas Nodal

Questions Questions http://nodal.ercot.com TDWG Nodal Update – June 6, 2007 7 Lead from the front Texas Nodal