NOTICE DATE:  October 1, 2015

NOTICE TYPE:  M-A092015-06 Unplanned Outage

SHORT DESCRIPTION:  Unplanned Outage of some ERCOT systems – Unplanned Fail-over

INTENDED AUDIENCE:  ERCOT Market Participants

DAY AFFECTED:  October 2, 2015 10:00 – 16:00 CPT

LONG DESCRIPTION:  On October 2, 2015, ERCOT will perform a controlled fail-over between data centers to allow for further preventive maintenance to be completed on systems currently used to operate applications involved in the fail-over on September 21, 2015.  During this fail-over, the following market-facing systems will be intermittently unavailable at the corresponding times:

10:00 – 12:00 CPT

· Find ESIID

13:00 – 16:00 CPT

· Find Transaction for historical searches (greater than 1 year)

· Market Data Transparency (MDT) Web Services

· Extract Subscriber

· Net Dependable Capability and Reactive Capability (NDCRC)

15:00 – 16:00 CPT

· Components of the ERCOT Market Information System (MIS) including:

o Report publishing to the MIS

o Downloading of extracts and reports from MIS and External Web Services (EWS)

· MIS and ERCOT.com dashboards and displays

CONTACT:  If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

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