How to use XCache
XCache serves 2 main functions:
- Keeps temporary local copies of data files in fast NVMe disks on site;
- Provides re-direction for data searches - i.e. if a user asks for a file that is not available on site, XCache traverses the hierarchy of XRootD servers and tries to find a site which has the needed file. Then it downloads the file from that site, saves a copy in its caching NVMe disks, and also serves to file to the user who initiated the request. In this way, a user can direct all of their data requests to the XCache redirector, and not bother with exact location of data.
