Write Back vs. Write Through Disk Caching

Write  back vs.Write  through?

Common wisdom is WB always faster?

• Not always so!

WT is usually faster for heavy loads

• If you cannot configure an optimal disk configuration:

1. select WT

1. RAID-5may be best with WB
2. Only when performing sequential loads

WB is usually faster for light loads

• If server is properly configured:
• Select WB