KodeKabuki

Last.fm uses MogileFS with SSDs →

Summary:

1. They used SSDs to store hot songs.
2. They picked the simple FIFO noop scheduler in the Linux I/O subsystem. For more info on the different schedulers, read Redhat’s IO Tuning Guide. They also set read_ahead_kb to a very low value since seek times are so low for SSDs anyway.
3. Modified MogileFS to differentiate between storage nodes with SSDs and nodes with regular HDDs.
4. 1 SSD => 7000 requests vs 1 7200rpm SATA => 300 requests.