Representation of the data stream of d.cold

The component d.cold admin communicates with d.cold service via HTTP, and d.cold service also communicates with the d.cold worker processes running on the same server via HTTP. When installed on several servers, the d.cold service instances also communicate using the HTTP protocol and route the queries to the local d.cold worker processes.

With regard to the data management of d.cold, please note the following: All d.cold worker and d.cold service instance communicate with an SQL server for job management purposes. The connection to the SQL server is established via ODBC and can optionally be encrypted using vendor-specific functions. Furthermore, all d.cold processes access a shared directory. This directory contains configuration and log files.

Additionally, the d.cold processing is done in the file system. Depending on the configuration of the d.cold process chains the d.cold processing can be done either locally or in a directory in the network. Although the data storage and the hard disk can be encrypted, the data is still transparently accessible. If applicable, critical data should therefore not be processed by d.cold.