----- Original Message ----- From: "John R Pierce" pierce@hogranch.com To: centos@centos.org Sent: Tuesday, July 12, 2011 12:34 AM Subject: Re: [CentOS] Suggest Hardware Raid Controller Card
On 07/11/11 9:30 AM, Drew wrote:
Which is funny because Intel's SASUC8i (rebranded LSI3082E-R) is true hardware RAID which I recently picked up*new* for $150. They don't do RAID-5/6 or have a BBU but IMO you don't need a BBU for RAID-0/1/10.
you want BBU (or flash-backed cache) if you want write-back cache, and not mandate write-through. This is quite independent of the RAID type. It greatly speeds up 'committed' random writes such as are generated by a transactional database.
Who needs bbu when you can get an SSD to work with your ext3/ext4 that is sitting on an md raid 1/0/nested 1+0/10?