# Installing and upgrading on Multiple Web Servers

![](https://content.gitbook.com/content/hlW9jKl7dcDggHAPhNU9/blobs/Fek4VUiXzUhqYzIH7i3P/load%20balancer.png)

To install Alemba Service Manager™ on more than one web server:

1. Install Alemba Service Manager™ on each web server.
2. Create and configure a new system on each of those servers, ensuring they all point to the same database.
3. On all but one of the servers, disable database upgrade:
   * In the registry key, disable the database upgrade using the registry string `SkipDatabaseUpgrade = 1`\ <br>

     <figure><img src="https://content.gitbook.com/content/hlW9jKl7dcDggHAPhNU9/blobs/5BaVJ3pUdKxwKuuwt0G9/Registry%20editor.png" alt=""><figcaption></figcaption></figure>
4. &#x20;Disable each of the ASM polling services on all but one server:

* Stop the ASM service and set the "Start Up" property to **Manual**; except for the ASM Administrative Service.
* Ensure the ASM Administrative Service is running on all servers and its Start Up property is set to **Automatic**.
* <mark style="background-color:blue;">Services can be load-balanced. Set a service to Automatic on one server and Manual on all other servers. Each service should only be running on one server.</mark>

{% hint style="warning" %}
When **upgrading** in a multi-server environment, run the upgrade once only on the shared database. On the second and subsequent servers, select **No** if prompted to upgrade the database.
{% endhint %}