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tutorial:adm:server_os_updates [2019/12/16 15:09]
fiserp [Performing the OS update] 		tutorial:adm:server_os_updates [2019/12/16 15:17]
fiserp [Performing the OS update]
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 <note>For Windows OSes, the update process is roughly the same. For checking services, status of the system and system logs, use the Event Viewer and Server Manager.</note> <note>For Windows OSes, the update process is roughly the same. For checking services, status of the system and system logs, use the Event Viewer and Server Manager.</note>
 +
 +==== Solving issues ====
 +During maintenance actions, it is necessary to know:
 +  * How long each task will take **TT**.
 +  * How long the whole maintenance will take **MT**.
 +    * This is not simply a sum od **TT**s, you should add some extra time **ET** to have a proper cushion.
 +  * How long (at worst) the whole rollback will take **RT**.
 +  * To have a maintenance window that spans at least **MT**+**RT** with some extra time **ET**.
 +    * You are not able to safely perform the maintenance in shorter window - if something goes wrong, you need at most **RT** time to perform the rollback!
 +    * If you do not have any **ET**, if anything goes wrong you have to perform rollback procedure. Therefore, **ET** gives you some time you can spend on solving the issue so you can continue with updates.
  • by fiserp