Dec
15th
Tue
15th
Last.fm uses MogileFS with SSDs
Comments
Summary:
- They used SSDs to store hot songs.
- 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_kbto a very low value since seek times are so low for SSDs anyway. - Modified MogileFS to differentiate between storage nodes with SSDs and nodes with regular HDDs.
- 1 SSD => 7000 requests vs 1 7200rpm SATA => 300 requests.
