Reconstruction policy (2)
Linux: favors performance over data availability
- automatically-initiated reconstruction, idle bandwidth
- virtually no performance impact on application
- very long window of vulnerability (ɭhr for 3GB RAID)
Solaris: favors data availability over app. perf.
- automatically-initiated reconstruction at high BW
- as much as 34% drop in application performance
- short window of vulnerability (10 minutes for 3GB)
Windows: favors neither!
- manually-initiated reconstruction at moderate BW
- as much as 18% app. performance drop
- somewhat short window of vulnerability (23 min/3GB)