This repository is the OSG implementation of an XCache (XRootD Caching Proxy) setup. XCache allows one to setup a "cache" server which saves frequently-accessed files at a specified "origin" to local storage, allowing repeated accesses of the same resource to be served without having to transfer them multiple times over the wide-area-network.

XCache is not a generic HTTP cache. Files in the cache do not expire, nor are there integrity checking mechanism such as HTTP's ETag. Unlike many HTTP caches, it can stream partial responses: if the client requests only a few bytes from a multi-gigabyte resource, XCache will send the response before the full download completes.

XCache installation is covered in the OSG documentation

The OSG packaging features:

• Data can be exported via the HTTP, HTTPS, and Xrootd protocols.
• Configurations for both running an origin and running a cache.
• Integrated authentication and authorization for caches.
• Usage monitoring integrated with OSG's monitoring services.

This is an experimental tool used to look for corrupted ROOT files within an XCache server. Only enable this service if you know what you are doing.

Before enabling the service, plese take a look to the configuration file located at: /etc/xrootd/xcache-consistency-check.cfg

To enable this service execute:

systemctl start xcache-consistency-check.timer