General Datawarehousing Interview Question:

What are the advantages of RAID 1, 1/0, and 5. What type of RAID setup would you put your TX logs?

Submitted by: Administrator

Transaction logs write sequentially and don't need to be read at all. The ideal is to have each on RAID 1/0 because it has much better write performance than RAID 5.

RAID 1 is also better for TX logs and costs less than 1/0 to implement. It has a tad less reliability and performance is a little worse generally speaking.

RAID 5 is best for data generally because of cost and the fact it provides great read capability.
Submitted by: Administrator