This is the main MogileFS daemon, mogilefsd, also called the “tracker”. All interaction with a MogileFS installation begins by a client talking to a tracker (you should run several in parallel for redundancy).
See MogileFS::Client for a client library.
The mogilefsd daemon is an event-loop in the parent process, handling with epoll/kqueue/etc (see Danga::Socket) tons of client connections, while managing a bunch of worker processes underneath.
The worker processes under mogilefsd include:
- Client query processing — implements the MogileFS client/server protocol
- Monitoring — monitors hosts and devices
- Replicate — replicates files
- Deleter — deletes files from storage nodes (protocol deletes from namespace are immediate)
- Reaper — re-enqueues files for replication when disks are marked dead
- Fsck — background filesystem consistency checker
Brad Fitzpatrick <email@example.com>
Mark Smith <firstname.lastname@example.org>
Brad Whitaker <email@example.com>
Copyright 2004, Danga Interactive Copyright 2005-2006, Six Apart Ltd.
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mogstored — MogileFS storage daemon