Actually, many SSD drives show much better performance for sequential write then random writes, so you may benefit from a separate drive for commit logs.
On Mon, Sep 23, 2013 at 11:21 AM, Robert Coli <rc...@eventbrite.com> wrote: > On Sun, Sep 22, 2013 at 4:02 PM, Shahryar Sedghi <shsed...@gmail.com>wrote: > >> This my first SSD experience. With normal disks we separate commit log >> from data. We have 2 SSDs dedicated to Cassandra I was wondering if we >> gain a better performance if we put commit log in one and data in >> another, or just use raid 0 to have both SSDs combined. >> > > The primary win from separation comes when your head does not move while > appending. As your SSDs have no heads, you do not get this win. > > =Rob >
