You are here: Reference > Hand-Editing Configuration Files > Basic Express Server Configuration Using XML Files > The Mirrors Element

The Mirrors Element

The Mirrors element is used to specify "secondary" Express Servers to which a "master" Express Server synchronizes its own catalog and spatial-index configuration. For detailed information about how to set up "mirroring" with your Express Servers, see Configuring Multiple Express Servers.

The Mirrors element may have any number of child Secondary elements.

The Secondary Element

Each Secondary element specifies a unique host. It has the following editable attributes:

host

This attribute specifies the name or IP address of the host to which the master mirrors its catalog and spatial-index configuration.

port

This attribute specifies which port of the secondary host Express Server uses. This attribute is optional. If absent, Port = 80 is assumed.

sslstrictness

This attribute specifies whether the secondary Express Server uses https. The sslstrictness property accepts the following values:

For the master Express Server to accept communication from a secondary Express Server using HTTPS, it requires an SSL certificate. Obtain a copy of the SSL certificate used by web server on the secondary Express Server, then place the certificate in the following directory:
<Installation Directory>\ImageServer\etc\
For Express Server to read the certificate, the certificate must be named ca-bundle.crt and saved in base64 encoding. If there are multiple secondary Express Servers, you must obtain a copy of each server's certificate. Then, use a text editor to concatenate the certificates into one file named ca-bundle.crt. For more information on SSL certificates, refer to your web server's documentation.