Opened 19 years ago
Closed 18 years ago
#971 closed enhancement (invalid)
optimization: instrument pswarp to determing the ammount of wall clock time spent in I/O
| Reported by: | jhoblitt | Owned by: | Paul Price |
|---|---|---|---|
| Priority: | high | Milestone: | |
| Component: | pswarp | Version: | unspecified |
| Severity: | minor | Keywords: | |
| Cc: |
Description
It would be nice to empirically figure out exactly that the interaction is between disk I/O caused by NFS, the Linux block I/O schedulers, and the Areca RAID controllers are. It is possible that the Areca hardware deals with I/O requests in an sophisticated enough manner that we are actually hurting overall I/O performance by trying to do any cleaver block I/O scheduling.
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can be done with profiling