What kind of performance benefit write back on a RAID controller gives?
To be more specific, the setup is 2 SSDs in RAID 1. The workload is mainly random write.
Given the above, what kind of performance increase can I expect using write back vs write through on a RAID card with 1GB RAM?
OS: Cent OS 6.5
CPU: Intel Xeon E3-1240v2
SSD: Intel S3500 160GB
RAID controller: MegaRAID SAS 9271-8i