On 1/20/2017 9:31 AM, Peter Peltonen wrote:
I am planning to have RAID1 setup and I am wondering if I should use the controller's RAID functionality which has 2GB cache or should I go with JBOD + Linux software RAID? The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034 7200rpm SAS/12Gbit 128 MB If hardware RAID is preferred, the controller's cache could be updated to 4GB and I wonder how much performance gain this would give me?
if the controller's cache has battery or flash backed writeback protection, that should be in play whether you use it as jbod or "hardware" raid. you'll find the biggest performance boost will be on OLTP type database operations where many small insert/update transactions are being done.... but, those drives are more of a bulk storage sort of drive, suitable for things like backup data, media servers, rather than database... dedicated database servers generally use higher RPM drives or nowdays, enterprise-grade SSD.
-- john r pierce, recycling bits in santa cruz _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx https://lists.centos.org/mailman/listinfo/centos
