The 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
Resource | Reason/Use/Dates | Start | End |
---|---|---|---|
Admin Applications (CalTABS - PeopleSoft) | System Maintenance | Wednesdays - 1700 | Wednesdays - 2300 |
AIX Servers (including HACMP) | All Preventative Maintenance is coordinated directly with our customers. | ||
CAWeb Publishing | System Maintenance | Mondays - 0900 | Mondays - 1100 |
CAWeb Publishing | System Maintenance | Wednesdays - 0900 | Wednesdays - 1100 |
Child Welfare Services (CWS) - SCT1 (IPL) | System Maintenance/IPL for zSystems Second Saturday of Month 01/13/24, 02/10/24, 03/09/24, 04/13/24 05/11/24, 06/08/24, 07/13/24, 08/10/24 09/14/24, 10/12/24, 11/09/24, 12/14/24 | Saturdays - 1500 | Saturdays - 1700 |
Child Welfare Services (CWS) - SCT2 (IPL) | System Maintenance/IPL for zSystems Second Saturday of January, March, April, June, July, September, October, December 01/13/24, 03/09/24, 04/13/24, 06/08/24 07/13/24, 09/14/24, 10/12/24, 12/14/24 | Saturdays - 1300 | Saturdays - 1500 |
Child Welfare Services (CWS) - SOC (IPL) | System Maintenance/IPL for zSystems Third Thursday of January, March, April, June, July, September, October, December 01/18/24, 03/21/24, 04/18/24, 06/20/24 07/18/24, 09/19/24, 10/17/24, 12/19/24 | Thursdays - 0200 | Thursdays - 0400 |
Child Welfare Services (CWS) - SOC/SCT2 (IML) | System Maintenance/IML for zSystems First Sunday of February, May, August, November Included in the SY2 Box IML 02/04/24, 05/05/24, 08/04/24, 11/03/24 | Sundays - 2000 | Sundays - 2300 |
Child Welfare Services (CWS) - SOCP (IPL) | System Maintenance/IPL for zSystems Fourth Sunday of February, March, May, June, August, September, November, December 02/25/24, 03/24/24, 05/26/24, 06/23/24 08/25/24, 09/22/24, 11/24/24, 12/22/24 | Sundays - 0300 | Sundays - 0500 |
Child Welfare Services (CWS) - SOCP/SCT1 (IML) | System Maintenance/IML for zSystems Fourth Sunday of January, April, July, October 01/28/24, 04/28/24, 07/28/24, 10/27/24 | Sundays - 0300 | Sundays - 0500 |
COLA - CCCC/DDDD (IPL) | System Maintenance/IPL for zSystems Third Sunday of each month 01/21/24, 02/18/24, 03/17/24, 04/21/24 05/19/24, 06/16/24, 07/21/24, 08/18/24 09/15/24, 10/20/24, 11/17/24, 12/15/24 | Sundays - 0400 | Sundays - 0800 |
Enterprise Linux Service - ELSGC1 Box (IML) | System Maintenance/IML for zSystems 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 for zSystems First Sunday of April, July, October Includes the following LPARs: ZLX6, ZLX1DR, ZLX3DR | Sundays - 2300 | Mondays - 0145 |
Linux Servers | All Preventative Maintenance is coordinated directly with our customers. | ||
MS SQL Server | System Maintenance | Saturdays - 0700 | Saturdays - 1200 |
Network | Network Normal PMs 01/07/24, 01/14/24, 01/21/24, 01/28/24 02/04/24, 02/11/24, 02/25/24, 03/03/24 03/10/24, 03/17/24, 03/24/24, 03/31/24 04/07/24, 04/14/24, 04/21/24, 04/28/24 05/05/24, 05/12/24, 05/19/24, 05/26/24 06/02/24, 06/09/24, 06/23/24, 06/30/24 07/07/24, 07/14/24, 07/21/24, 07/28/24 08/04/24, 08/11/24, 08/18/24, 08/25/24 09/01/24, 09/08/24, 09/15/24, 09/22/24 09/29/24, 10/06/24, 10/13/24, 10/20/24 10/27/24, 11/03/24, 11/10/24, 11/17/24 11/24/24, 12/01/24, 12/08/24, 12/15/24 12/22/24, 12/29/24 | Sundays - 0400 | Sundays - 0700 |
Network | Super Sundays 05/19/2024,10/13/2024 | Sundays - 0000 | Sundays - 0700 |
Network | Network Extended PMs 01/21/24, 02/25/24, 03/17/24, 04/14/24 06/23/24, 07/14/24, 08/11/24, 09/15/24 11/17/24,12/15/24 | Sundays - 0200 | Sundays - 0700 |
Network | Network Maintenance Non-disruptive and coordinated single customer changes 01/03/24, 01/10/24, 01/17/24, 01/24/24 01/31/24, 02/07/24, 02/14/24, 02/21/24 02/28/24, 03/06/24, 03/13/24, 03/20/24 03/27/24, 04/03/24, 04/10/24, 04/17/24 04/24/24, 05/01/24, 05/08/24, 05/15/24 05/22/24, 05/29/24, 06/05/24, 06/12/24 06/19/24, 06/26/24, 07/03/24, 07/10/24 07/17/24, 07/24/24, 07/31/24, 08/07/24 08/14/24, 08/21/24, 08/28/24, 09/04/24 09/11/24, 09/18/24, 09/25/24, 10/02/24 10/09/24, 10/16/24, 10/23/24, 10/30/24 11/06/24, 11/13/24, 11/20/24, 11/27/24 12/04/24, 12/11/24, 12/18/24 | Wednesdays - 0000 | Wednesdays - 0600 |
Network | Network Patching Window 01/04/24, 01/11/24, 01/18/24 ,01/25/24 02/01/24, 02/08/24, 02/15/24, 02/22/24 02/29/24, 03/07/24, 03/14/24, 03/21/24 03/28/24, 04/04/24, 04/11/24, 04/18/24 04/25/24, 05/02/24, 05/09/24, 05/16/24 05/23/24, 05/30/24, 06/06/24, 06/13/24 06/20/24, 06/27/24, 07/11/24, 07/18/24 07/25/24, 08/01/24, 08/08/24, 08/15/24 08/22/24, 08/29/24, 09/05/24, 09/12/24 09/19/24, 09/26/24, 10/03/24, 10/10/24 10/17/24, 10/24/24, 10/31/24, 11/07/24 11/14/24, 11/21/24, 11/28/24, 12/05/24 12/12/24, 12/19/24 | Thursdays - 2000 | Thursdays - 2400 |
OET Applications - CAMS, COLD/CSTD, SharePoint and BPAS Web Applications | System Maintenance | Wednesdays - 1700 | Wednesdays - 2300 |
Open Systems Backup/Restore | Backup/Restore for AIX, Linux, Solaris, and Windows Storage | Tuesdays - 1200 | Tuesdays - 1400 |
Open Systems Storage | System Maintenance Firmware update/patches to SAN switches, storage arrays, and appliances (non-disruptive changes) | Sundays - 0800 | Sundays - 1700 |
S1S1 (IML) | System Maintenance/IML for zSystems Monday after the second Sunday of February, May, August, November 02/12/24, 05/13/24, 08/12/24, 11/11/24 | Mondays - 0001 | Mondays - 0200 |
S1S1/S2S2 (IPL) Shared Mainframe System | System Maintenance/IPL for zSystems Monday after the second and fourth Sunday of each month 01/15/24, 01/29/24, 02/12/24, 02/26/24 03/11/24, 03/25/24, 04/15/24, 04/29/24 05/13/24, 05/27/24, 06/10/24, 06/24/24 07/15/24, 07/29/24, 08/12/24, 08/26/24 09/09/24, 09/23/24, 10/14/24, 10/28/24 11/11/24, 11/25/24, 12/09/24, 12/23/24 | Mondays - 0001 | Mondays - 0200 |
S2S2 (IML) | System Maintenance/IML for zSystems Monday after the second Sunday of March, June, September, December 03/11/24, 06/10/24, 09/09/24, 12/09/24 | Mondays - 0001 | Mondays - 0200 |
Secure Automated File Exchange (SAFE) | System Maintenance 01/20/24, 02/24/24, 03/30/24, 04/20/24 05/18/24, 06/22/24, 07/20/24, 08/24/24 09/21/24, 10/19/24, 11/23/24, 12/14/24 | Saturdays - 2000 | Sundays - 0200 |
ServiceNow | System Maintenance (Non-disruptive changes) | Thursdays - 1900 | Thursdays - 2100 |
ServiceNow | System Maintenance (Disruptive changes) | Thursdays - 2200 | Thursdays - 2359 |
SMTP Relay | System Maintenance | Fridays - 1900 | Saturdays - 0200 |
Solaris Servers | All Preventative Maintenance is coordinated directly with our customers. | ||
SY2/SY7 (IPL) Duplex | System Maintenance/IPL for zSystems First and Third Sunday* of each month (24/7 backup system) *Except Sundays when SY2 box is scheduled for IML (02/04/24, 05/05/24, 08/04/24, 11/03/24) 01/07/24, 01/21/24, 02/18/24, 03/03/24 03/17/24, 04/07/24, 04/21/24, 05/19/24 06/02/24, 06/16/24, 07/07/24, 07/21/24 08/18/24, 09/01/24, 09/15/24, 10/06/24 10/20/24, 11/17/24, 12/01/24, 12/15/24 | Sundays - 2000 | Sundays - 2200 |
SY2 Box (IML) | System Maintenance/IML for zSystems First Sunday of February, May, August, November Includes the following LPARs: SY2, SY3, SY6, SY8P, SOC, and SCT2 02/04/24, 05/05/24, 08/04/24, 11/03/24 | Sundays - 2000 | Sundays - 2300 |
SY3 (SCO) (IPL) | IPL for zSystems Weekly on Sundays* *Except Sundays when SY2 box is scheduled for IML (02/04/24, 05/05/24, 08/04/24, and 11/03/24) 01/07/24, 01/14/24, 01/21/24, 01/28/24 02/11/24, 02/18/24, 02/25/24. 03/03/24 03/10/24, 03/17/24, 03/24/24, 03/31/24 04/07/24, 04/14/24, 04/21/24, 04/28/24 05/12/24, 05/19/24, 05/26/24, 06/02/24 06/09/24, 06/16/24, 06/23/24, 06/30/24 07/07/24, 07/14/24, 07/21/24, 07/28/24 08/11/24, 08/18/24, 08/25/24, 09/01/24 09/08/24, 09/15/24, 09/22/24, 09/29/24 10/06/24, 10/13/24, 10/20/24, 10/27/24 11/10/24, 11/17/24, 11/24/24, 12/01/24 12/08/24, 12/15/24, 12/22/24, 12/29/24 | Sundays - 2030 | Sundays - 2130 |
SY4/SY5/SY6 (IPL) | System Maintenance/IPL for zSystems First and Third Sunday* of each month *Except Sundays when SY4 or SY5 are scheduled for IML (01/07/24 (SY4), 03/03/24 (SY5), 04/07/24 (SY4), 06/02/24 (SY5), 07/07/24 (SY4), 09/01/24 (SY5), 10/06/24 (SY4)) 01/21/24, 02/04/24, 02/18/24, 03/17/24 04/21/24, 05/05/24, 05/19/24, 06/16/24 07/21/24, 08/04/21, 08/18/24, 09/15/24 10/20/24, 11/03/24, 11/17/24, 12/01/24 12/15/24 | Sundays - 2300 | Mondays - 0145 |
SY4 Box (IML) | System Maintenance/IML for zSystems First Sunday of January, April, July, October Includes the following LPARs: SY9, ZLX1 and ZLX2 01/07/24, 04/07/24, 07/07/24, 10/06/24 | Sundays - 2300 | Mondays - 0145 |
SY5 Box (IML) | System Maintenance/IML for zSystems First Sunday of March, June, and September Includes the following LPAR: SY7 03/03/24, 06/02/24, 09/01/24 | Sundays - 2300 | Mondays - 0145 |
SY8/SY8B | CMC Roll to Backup for zSystems (when needed) 01/07/24, 03/03/24, 04/07/24, 06/02/24 07/07/24, 09/01/24, 10/06/24, 12/01/24 | Sundays - 0300 | Sundays - 0400 |
SY8H (IPL) | CMCH IPL for zSystems First Sunday* of each month *Except Sundays when SY5 box is scheduled for IML (SY5 - (03/05/2023, 06/04/2023, 09/03/2023)) 01/07/24, 02/04/24, 04/07/24, 05/05/24 07/07/24, 08/04/24, 10/06/24, 11/03/24 12/01/24 | Sundays - 2300 | Mondays - 0145 |
SY8P | CMC IPL for zSystems First Sunday* of each month *Except Sundays of each month when SY2 box is scheduled for IML (SY2 scheduled for (02/05/2023, 05/07/2023, 08/06/2023, 11/05/2023)) 01/07/24, 03/03/24, 04/07/24, 06/02/24 07/07/24, 09/01/24, 10/06/24, 12/01/24 | Sundays - 2100 | Sundays - 2200 |
Server Based Computing Services (Formerly Virtual Desktop) | System Maintenance Every Saturday* *OS Security patching completed the last Saturday of each month 01/27/24, 02/24/24, 03/23/24, 04/27/24 05/25/24, 06/29/24, 07/27/24, 08/31/24 09/28/24, 10/26/24, 11/30/24, 12/28/24 | Saturday - 0600 | Saturday - 1000 |
Windows Resources | System Maintenance 01/12/24, 01/19/24, 02/16/24, 02/23/24 03/15/24, 03/22/24, 04/12/24, 04/19/24 05/17/24, 05/24/24, 06/14/24, 06/21/24 07/12/24, 07/19/24, 08/16/24, 08/23/24 09/13/14, 09/20/24, 10/11/24, 10/18/24 11/15/24, 11/22/24, 12/13/24, 12/20/24 | Fridays - 1800 | Saturdays - 0100 |
www.ca.gov | System Maintenance | Fridays - 0600 | Fridays - 0800 |
ZLX1 & ZLX4 | zSystems First Sunday of each month | Sundays - 2030 | Sundays - 2130 |
ZLX2 & ZLX3 | zSystems Second Sunday of each month at 20:30-21:30 *except Sundays when SY4 box is scheduled for IML | Sundays - 2030 | Sundays - 2130 |