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 (Start or End columns) 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
Admin Applications (CalTABS - PeopleSoft)System MaintenanceWednesdays - 1700Wednesdays - 2300
Advanced Interactive Servers (AIX)Extended Preventative Maintenance
Recycle of Individual Servers split between the Second and Third Sunday of February, May, August, November
Sundays - 0030 Sundays - 0730
AIX ServersRecycle of Individual Servers split between the Second and Third Sunday of MonthSundays - 0030 Sundays - 0430
AIX Servers (HACMP Clusters)High-Availability Cluster Failover Testing
Twice a year during regular PM windows (schedule determined with each customer)
Sundays - 0030 Sundays - 0430
CalCloudSecurity Patches and RebootsFridays - 1900 Saturdays - 0600
Child Welfare Services (CWS) - SCT1 (IPL)System Maintenance/IPL
Second Saturday of Month
04/04/2020
05/03/2020
06/13/2020
07/12/2020
08/02/2020
09/12/2020
10/10/2020
11/14/2020
12/12/2020
Saturdays - 1500 Saturdays - 1700
Child Welfare Services (CWS) - SCT2 (IPL)System Maintenance/IPL
Second Saturday of January, March, April, June, July, September, October, December
04/04/2020
05/03/2020
06/13/2020
07/12/2020
08/02/2020
09/12/2020
10/10/2020
11/14/2020
12/12/2020
Saturdays - 1300 Saturdays - 1500
Child Welfare Services (CWS) - SOC (IPL)System Maintenance/IPL
Third Thursday of January, March, April, June, July, September, October, December
03/19/2020
04/09/2020
05/03/2020
06/18/2020
07/16/2020
08/02/2020
09/17/2020
10/15/2020
11/01/2020
12/17/2020
Thursdays - 0200Thursdays - 0400
Child Welfare Services (CWS) - SOC/SCT2 (IML)System Maintenance/IML
First Sunday of February, May, August, November
Included in the SY2 Box IML
05/03/2020
08/02/2020
11/01/2020
Sundays - 2000 Sundays - 2300
Child Welfare Services (CWS) - SOCP (IPL)System Maintenance/IPL
Fourth Sunday of February, March, May, June, August, September, November, December
03/22/2020
04/26/2020
05/24/2020
06/28/2020
07/26/2020
08/23/2020
09/27/2020
10/25/2020
11/22/2020
12/27/2020
Sundays - 0300 Sundays - 0500
Child Welfare Services (CWS) - SOCP/SCT1 (IML)System Maintenance/IML
Fourth Sunday of January, April, July, October
04/26/2020
07/26/2020
10/25/2020
Sundays - 0300 Sundays - 0500
Enterprise Linux Service - ELSGC1 Box (IML)System Maintenance/IML
First Sunday of March, June, and September Includes the following LPARs: ZLX3, ZLX4, ZLX9
Sundays - 2300 Mondays - 0145
Enterprise Linux Service - ELSVV1 Box (IML)System Maintenance/IML
First Sunday of April, July, October
Includes the following LPARs: ZLX6, ZLX1DR, ZLX3DR
Sundays - 2300 Mondays - 0145
Linux ServersSecurity Patches and RebootsSundays - 2000 Sundays - 2359
MS SQL ServerSystem MaintenanceSaturdays - 0700 Saturdays - 1200
NetworkNetwork Maintenance
Non-disruptive and coordinated single customer changes
Wednesdays - 0000Wednesdays - 0600
NetworkCGEN and Campus Network MaintenanceSundays - 0400 Sundays - 0700
Network - 20202020 Extended PMs
03/15/2020
04/12/2020
05/10/2020
06/14/2020
07/12/2020
08/16/2020
09/20/2020
10/18/2020
11/15/2020
12/13/2020
Sundays - 0200Sundays - 0700
Network - 20212021 Super Sundays
05/16/2021
10/17/2021
Sundays - 0000Sundays - 0700
Network - 20212021 Network Extended PMs
01/17/2021
02/14/2021
03/14/2021
04/11/2021
06/13/2021
07/11/2021
08/15/2021
09/12/2021
10/10/2021
11/14/2021
12/12/2021
Sundays - 0200Sundays - 0700
OET Applications - CAMS, COLD/CSTD, SharePoint and BPAS Web ApplicationsSystem MaintenanceWednesdays - 1700Wednesdays - 2300
Open Systems Backup/RestoreBackup/RestoreTuesdays - 1200Tuesdays - 1400
Open Systems StorageSystem Maintenance: Firmware update/patches to SAN switches, storage arrays, and appliances (Non-disruptive changes)Sundays - 0800Sundays - 1700
ServiceNowSystem Maintenance (Non-disruptive changes)Thursdays - 1900 Thursdays - 2100
ServiceNowSystem Maintenance (Disruptive changes)Thursdays - 2200 Thursdays - 2359
S1S1 (IML)System Maintenance/IML
Monday after the second Sunday of February, May, August, November
05/11/2020
08/10/2020
11/09/2020
Mondays - 0001Mondays - 0200
S1S1/S2S2 (IPL)
Shared Mainframe System
System Maintenance/IPL
Monday after the second and fourth Sunday of each month
03/23/2020
04/13/2020
04/27/2020
05/11/2020
05/25/2020
06/15/2020
06/29/2020
07/13/2020
07/27/2020
08/10/2020
08/24/2020
09/14/2020
09/28/2020
10/12/2020
10/26/2020
11/09/2020
11/23/2020
12/14/2020
12/28/2020
Mondays - 0001Mondays - 0200
S2S2 (IML)System Maintenance/IML
Monday after the second Sunday of March, June, September, December
06/15/2020
09/14/2020
12/14/2020
Mondays - 0001Mondays - 0200
Secure Automated File Exchange (SAFE)System MaintenanceSaturdays - 0800 Saturdays - 1200
SMTP RelaySystem MaintenanceFridays - 1900Saturdays - 0200
Solaris ServersSecurity Patches and RebootsSundays - 2000 Sundays - 2359
SY2/SY7 (IPL)System Maintenance/IPL
First and Third Sunday of each month
(24/7 backup system)
04/05/2020
04/19/2020
05/03/2020
05/17/2020
06/07/2020
06/21/2020
07/05/2020
07/19/2020
08/02/2020
08/16/2020
09/06/2020
09/20/2020
10/04/2020
10/18/2020
11/01/2020
11/15/2020
12/06/2020
12/20/2020
Sundays - 2000 Sundays - 2200
SY2 Box (IML)System Maintenance/IML
First Sunday of February, May, August, November
Includes the following LPARs: SY2, SY3, SY6, SY8P, SOC, SCT2
08/02/2020
11/01/2020
Sundays - 2000 Sundays - 2300
SY3 (SCO)System MaintenanceSaturdays - 2200 Mondays - 0600
SY3 (SCO) (IML)System Maintenance/IML
First Sunday of February, May, August, November
Included in the SY2 Box IML
08/02/2020
11/01/2020
Sundays - 2000 Sundays - 2300
SY3 (SCO) (IPL)IPL - Weekly on Sundays
03/22/2020 and 03/29/2020
04/05/2020, 04/12/2020, 04/19/2020, and 04/26/2020
05/03/2020, 05/10/2020, 05/17/2020, 05/24/2020, and 05/31/2020
06/07/2020, 06/14/2020, 06/21/2020, and 06/28/202
07/12/2020, 07/19/2020, and 07/26/2020
08/02/2020, 08/09/2020, 08/16/2020, 08/23/2020, and 08/30/2020
09/06/2020, 09/13/2020, 09/20/2020, and 09/27/2020
10/04/2020, 10/11/2020, 10/18/2020, and 10/25/2020
11/01/2020, 11/08/2020, 11/15/2020, 11/22/2020, and 11/29/2020
12/06/2020, 12/13/2020, 12/20/2020, and 12/27/2020
Sundays - 2030 Sundays - 2130
SY4/SY5/SY6 (IPL)System Maintenance/IPL
First and Third Sunday of each month
4/5/2020
4/19/2020
5/3/2020
5/17/2020
6/7/2020
6/21/2020
07/05/2020
07/19/2020
08/02/2020
08/16/2020
09/06/2020
09/20/2020
10/04/2020
10/18/2020
11/01/2020
11/15/2020
12/06/2020
12/20/2020
Sundays - 2300 Mondays - 0145
SY4 Box (IML)System Maintenance/IML
First Sunday of January, April, July, October
Includes the following LPARs: SY9, ZLX1 and ZLX2
04/05/2020
07/05/2020
10/04/2020
Sundays - 2300 Mondays - 0145
SY5 Box (IML)System Maintenance/IML
First Sunday of March, June, and September
Includes the following LPAR: SY7
06/07/2020
09/06/2020
Sundays - 2300 Mondays - 0145
SY8/SY8BCMC Roll to Backup (when needed)Sundays - 0300 Sundays - 0400
SY8PCMC IPL
First Sunday of each month
04/05/2020
05/03/2020
06/07/2020
07/05/2020
08/02/2020
09/06/2020
10/04/2020
11/01/2020
12/06/2020
Sundays - 2100 Sundays - 2200
Virtual Desktop (aka SBCS)System MaintenanceSaturdays - 0600 Saturdays - 1000
Web Content Management SystemSystem MaintenanceMondays - 0400Mondays - 0600
Windows ResourcesSystem Maintenance on the following dates:
03/20/2020 and 03/27/2020
04/17/2020 and 04/24/2020
05/15/2020 and 05/22/2020
06/19/2020 and 06/26/2020
07/17/2020 and 07/27/2020
08/21/2020 and 08/28/2020
09/18/2020 and 09/25/2020
10/16/2020 and 10/23/2020
11/13/2020 and 11/20/2020
12/11/2020 and 12/18/2020
Fridays - 1800Saturdays - 0100
www.ca.govSystem MaintenanceFridays - 0600 Fridays - 0800
ZLX1 & ZLX4First Sunday of each monthSundays - 2030 Sundays - 2130
ZLX2 & ZLX3Second Sunday of each month at 20:30-21:30
*except Sundays when SY4 box is scheduled for IML
Sundays - 2030 Sundays - 2130