fastblock-mon is used to store cluster metadata(to etcd) and distribute them(osdmap,pgmap etcd) to client(osds and clients). fbclient can fetch osdmap and pgmap, also can create osds and fake boot them. fakeosd is a fake osd to communicate with monitor.
acquired package info from repodata DB: repodata/1878cc60a19e65efc93d1a539275c5a6799b0acbd7796ee105712c44cae47ab4-primary.sqlite.bz2