userblob — Clustered. Stores blobs (binary large objects) of on-disk data. Blob* files/classes for storing Blobs need to be added either to a local path or a remote Blob server ("remote Blob server" support has since been removed in favor of MogileFS). Notes: blobids aren't necessarily unique between domains; global userpicids may collide with the counter used for the rest. So, the type must be in the key. domain IDs are set up in ljconfig.pl.