---
title: "Maintenance window"
sidebar_label: "Maintenance window"
sidebar_position: 8
description: "How to configure the maintenance window for automatic maintenance tasks for a 1C server cluster, and how to view maintenance history"
---

import Formbricks from '@theme/MDXComponents/Formbricks'
import {CustomTable} from '@selectel/docux/components'
import CheckIcon from '@selectel/docux/icons/check'
import EditIcon from '@selectel/docux/icons/edit'

# Maintenance window

A maintenance window is a time period during the day when automatic maintenance tasks for your 1C server cluster can be triggered.

If maintenance is scheduled for a 1C server cluster, the cluster enters the `MAINTENANCE` status during the maintenance window. Cluster maintenance takes up to an hour. During this time, the cluster continues to function normally and remains accessible over the network, but it may be restarted. Cluster scaling is unavailable during maintenance.

If maintenance cannot be performed—for example, if the cluster was in the process of scaling throughout the entire maintenance window—the maintenance task will be rescheduled for the next window.

when [creating a 1C server cluster](/cloud-1c/quickstart.mdx#choose-cluster-configuration) in the Control panel, the maintenance window is set by default to the period from 4 to 5 AM in your time zone. You can [change the maintenance window](#change-maintenance-window) for an existing cluster.

You can [view scheduled and past maintenance in the history](#view-maintenance-history).

## Change the maintenance window \{#change-maintenance-window}

1. In the [Control panel](https://my.selectel.ru/ones/server/), from the top menu, click **Products** and select **1C Managed Cloud**.
2. go to the **1C Server Clusters** section.
3. open the cluster page → **Settings** tab.
4. In the **Maintenance window** row, click <EditIcon />.
5. Select a new start time for the window. The window lasts for one hour; the window duration cannot be changed.
6. Click <CheckIcon />.

## View maintenance history \{#view-maintenance-history}

1. In the [Control panel](https://my.selectel.ru/ones/server/), on the top menu, click **Products** and select **1C Managed Cloud**.
2. Go to the **1C Server Clusters** section.
3. Open the cluster page → **Maintenance** tab.
4. View the list of maintenance tasks. For each task, the following is shown:

   * start date and time;
   * tasks performed during maintenance;
   * unique maintenance task identifier (UUID);
   * maintenance status:

     <CustomTable>
       <table>
         <tbody>
           <tr>
             <th>SCHEDULED</th><td>Maintenance is scheduled</td>
           </tr>

           <tr>
             <th>PENDING</th><td>Maintenance task has been triggered and is waiting to be executed</td>
           </tr>

           <tr>
             <th>RUNNING</th><td>Maintenance is in progress</td>
           </tr>

           <tr>
             <th>SUCCEEDED</th><td>Maintenance completed successfully</td>
           </tr>

           <tr>
             <th>CANCELLED</th><td>Maintenance was cancelled</td>
           </tr>

           <tr>
             <th>ERRORED</th><td>Maintenance ended with an error</td>
           </tr>
         </tbody>
       </table>
     </CustomTable>

<Formbricks />