Eclipse updating maven dependencies long time
This can come in handy if you have a series of repositories which you do not want to include in artifact searches.
This "workspace" repository is shown in Figure 6.10, “Browsing the m2eclipse Workspace Repository” under the Local Repository folder.
This can be a useful tool if there is another process outside of Eclipse that is going to be modifying a local Maven repository.
Choosing this option causes m2eclipse to skip index generation for a repository.
It will also contain mirrors that have been configured in your Maven Settings ( If you have been using Maven, you are familiar with the Central Maven repository.
This is default repository from which Maven will retrieve dependencies and other artifacts needed during a build.