On 5 Sep 2014, at 10:05 am, Steve Robenalt <sroben...@highwire.org> wrote:
> We are migrating a small cluster on AWS from instances based on spinning > disks (using instance store) to SSD-backed instances and we're trying to pick > the proper instance type. Some of the recommendations for spinning disks say > to use different drives for log vs data partitions to avoid issues with seek > delays and contention for the disk heads. Since SSDs don't have the same seek > delays, is it still recommended to use 2 SSD drives? Or is one sufficient? As a side note, splitting the commit log and data dirs into different volumes doesn’t do a whole lot of good on AWS irrespective of whether you are on spinning disks or SSDs. Simply because the volumes presented to the vm may be on the same disk. Just raid the available volumes and be done with it. Ben Bromhead Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
