Information Technology Report Trey Felton Manager, IT Service Delivery October 2011 ERCOT Public

2 October 18, 2011 Highlights Service Availability: Market Operations IT systems met all SLA targets Market Data Transparency IT systems met all SLA targets Retail Market IT systems missed one SLA target (Retail Processing Business Hours) Retail Market IT system outage with impact to SLA: Data Center migration to the new T3 site resulted in an incorrect Internet Protocol (IP) address configuration (9/26) Improperly routed traffic caused messages to queue and slow processing which resulted in 60 minutes of delayed transactions and slow MarkeTrak performance Correct IP configuration change was applied to resolve the issue Retail Market unplanned outages: Two parallel processes encountered contention that affected Electronic Data Interchange (EDI) (9/6) Retail transaction processing was unavailable for 28 minutes (outside of business hours) Short-term resolution: Restarted one of the processes in contention Long-term: Configure processes to run on different systems and eliminate contention. The fix will be implemented with the move to new data center by 10/30 Hardware failure caused outage of Enterprise Data Warehouse (EDW) (9/26) Caused Get Reports and other components of TML and MIS to be unavailable for 75 minutes Short-term: Manually took component out of service and used redundant component (NIC) Long-term: Replaced hardware to resolve issue

3 Highlights Cont’d Planned Outages: Weekend Retail and Market Operations maintenance activity (9/11 and 9/25) Outages lasted 1,471 minutes which is within the 1,800 minutes allowed via SLA SLA Exception Request - October An extended retail outage requested through RMS and COPS to execute retail system moves to the new T3 Data Center in Taylor (10/22, 10/23, 10/29, 10/30) ERCOT PublicOctober 18, 2011

4 SLA Exception Request ERCOT requests a 36-hour Release window be granted for October (Saturday noon through Sunday midnight), and again for the same period on October These two windows are necessary to complete the migration (and verification) of Production systems as part of the Data Center Migration Project There are no Release windows outlined in the SLA for 2011 due to Nodal Stabilization –Currently there are only Sunday maintenance windows, which are insufficient for the volume of activities with the Data Center Migration TDTWGOctober 2011

5 ERCOT Public 2011 Net Service Availability (Retail and Market Ops) October 2011

Data Center Availability ERCOT PublicOctober 2011

7 ERCOT Public September 2011 Net Service Availability October 2011

8 September 2011 Data Center Power Availability ERCOT PublicOctober 2011

9 YTD Availability – Retail Market IT Services ERCOT PublicOctober 2011

10 YTD Availability – Market Operations ERCOT PublicOctober 2011

11 Retail Transaction Processing Availability ERCOT PublicOctober 18, 2011

12 Retail Transaction Processing Availability ERCOT PublicOctober 18, 2011

13 ERCOT Public TML Report Explorer Availability October 18, 2011

14 Release Management Metrics (Releases) ERCOT PublicOctober 2011 Awaiting slide

15 Release Management Metrics (Changes) ERCOT PublicOctober 2011 Awaiting slide

16 ERCOT Public Website Metrics ERCOT PublicOctober 2011 Awaiting slide

17 ERCOT Public Website Metrics ERCOT PublicOctober 2011 Awaiting slide