Preventative Maintenance and Patching Schedules

California Department of Technology (CDT) is committed to ensuring that all major components of its infrastructure are upgraded, patched and at recommended levels to meet our performance, reliability, availability and security objectives.

The scheduled maintenance windows allow CDT to increase our responsiveness to security threats, install timely upgrades to both server and networking hardware and software, and to implement critical infrastructure projects to proactively safeguard our customers. CDT coordinates all changes with the customers who will be impacted by work performed during these windows.

The Preventative Maintenance Schedule can be sorted by Day and by Resource. Please note that the Start and End times indicate the window within which maintenance will be performed; not necessarily the actual beginning and ending times.

Preventative Maintenance Schedule

ResourceReason/UseStartEnd
S1S1/S2S2 (IPL)
Shared Mainframe System
System Maintenance/IPL
Monday* after the second and fourth Sunday of each month
*Except Mondays when S1S1or S2S2 box is scheduled for IML
Monday - 0001Monday - 0200
S1S1 (IML)System Maintenance/IML
Monday after the second Sunday of February, May, August, November
Monday - 0001Monday - 0200
S2S2 (IML)System Maintenance/IML
Monday after the second Sunday of March, June, September, December
Monday - 0001Monday - 0200
URSUS Web Content Management System (CMS)System MaintenanceMonday - 0400Monday - 0600
ITSD Applications
(TUAM, PeopleSoft, CSS, CAMS, COLD/CSTD, SharePoint, and BPAS Web Applications)
System MaintenanceWednesday - 1700Wednesday - 2300
NetworkNetwork Maintenance
Non-disruptive and coordinated single customer changes
Wednesday - 0000Wednesday - 0600
Child Welfare Services
(CWS) - SOC (IPL)
System Maintenance/IPL
Third Thursday of January, March, April, June, July, September, October, December
Thursday - 0200Thursday - 0400
RemedySystem Maintenance (Non-disruptive changes)Thursday - 1900 Thursday - 2100
RemedySystem Maintenance (Disruptive changes)Thursday - 2200 Thursday - 2359
www.ca.govSystem MaintenanceFriday - 0600 Friday - 0800
Windows ResourcesSystem MaintenanceFriday - 1800Saturday - 0100
CA.mailSystem MaintenanceFriday - 1900Saturday - 0200
CalCloudSecurity Patches and RebootsFriday - 1900 Saturday - 1900
Server Based Computing (SBCS)System MaintenanceSaturday - 0600 Saturday - 1000
MS SQL ServerSystem MaintenanceSaturday - 0700 Saturday - 1200
Secure File Transfer (SFT)System MaintenanceSaturday - 0800 Saturday - 1200
CWS - SCT2 (IPL)System Maintenance/IPL
Second Saturday of January, March, April, June, July, September, October, December
Saturday - 1300 Saturday - 1500
CWS - SCT1 (IPL)System Maintenance/IPL
Second Saturday of Month
Saturday - 1500 Saturday - 1700
SY3 (SCO)System MaintenanceSaturday - 2200 Monday - 0600
AIX ServersRecycle of Individual Servers split between the Second and Third Sunday of MonthSunday - 0030 Sunday - 0430
AIX Servers (HACMP Clusters)High-Availability Cluster Failover Testing
Twice a year during regular PM windows (schedule determined with each customer)
Sunday - 0030 Sunday - 0430
Advanced Interactive Servers (AIX)Extended Preventative Maintenance
Recycle of Individual Servers split between the Second and Third Sunday of February, May, August, November
Sunday - 0030 Sunday - 0730
SY8/SY8B CMC Roll to Backup (when needed)Sunday - 0300 Sunday - 0400
CWS - SOCP (IPL)System Maintenance/IPL
Fourth Sunday of February, March, May, June, August, September, November, December
Sunday - 0300 Sunday - 0500
CWS - SOCP/SCT1 (IML)System Maintenance/IML
Fourth Sunday of January, April, July, October
Sunday - 0300 Sunday - 0500
NetworkCGEN and Campus Network MaintenanceSunday - 0400 Sunday - 0700
SY2/SY7 (IPL)System Maintenance/IPL
First and Third Sunday* of each month
(24/7 backup system)
*Except Sundays when SY2 box is scheduled for IML
Sunday - 2000 Sunday - 2200
SY2 Box (IML)System Maintenance/IML
First Sunday of February, May, August, November
Includes the following LPARs: SY2, SY3, SY6, SY8P, SOC, SCT2
Sunday - 2000 Sunday - 2300
SY3 (SCO) (IML)System Maintenance/IML
First Sunday of February, May, August, November
Sunday - 2000 Sunday - 2300
CWS - SOC/SCT2 (IML)System Maintenance/IML
First Sunday of February, May, August, November
Sunday - 2000 Sunday - 2300
SY8PCMC IPL
First Sunday* of each month
*Except Sundays when SY2 box is scheduled for IML
Sunday - 2100 Sunday - 2200
SY3 (SCO) (IPL)IPL
Weekly on Sundays*
*Except Sundays when SY2 box is scheduled for IML
Sunday - 2030 Sunday - 2130
Linux ServersSecurity Patches and RebootsSunday - 2000 Sunday - 2359
Solaris ServersSecurity Patches and RebootsSunday - 2000 Sunday - 2359
ZLX1 & ZLX4First Sunday of each month
*except Sundays when SY4 box is scheduled for IML
Sunday - 2030 Sunday - 2130
ZLX2 & ZLX3Second Sunday of each month at 20:30-21:30
*except Sundays when SY4 box is scheduled for IML
Sunday - 2030 Sunday - 2130
Enterprise Linux Service
ELSGC1 Box (IML)
System Maintenance/IML
First Sunday of March, June, and September Includes the following LPAR: ZLX3, ZLX4, ZLX9
Sunday - 2300 Monday - 0145
ELSVV1 Box (IML)System Maintenance/IML
First Sunday of April, July, October
Includes the following LPAR: ZLX6, ZLX1DR, ZLX3DR
Sunday - 2300 Monday - 0145
SY4/SY5/SY6 (IPL) System Maintenance/IPL
First and Third Sunday* of each month
*Except Sundays when SY4, or SY5 box is scheduled for IML
Sunday - 2300 Monday - 0145
SY4 Box (IML)System Maintenance/IML
First Sunday of January, April, July, October
Includes the following LPAR: SY9, ZLX1 and ZLX2
Sunday - 2300 Monday - 0145
SY5 Box (IML)System Maintenance/IML
First Sunday of March, June, and September
Includes the following LPAR: SY7
Sunday - 2300 Monday - 0145