Xsan

Xsan: Tracking Down Latency Problems

Xsan stores the logs for a volume in /Library/Filesystems/Xsan/data/<Volume Name>/log/cvlog.  When you’re trying to find whether there is too much latency you can look for the following in the logs:

PIO HiPriWr SUMMARY <Storage Pool> sysavg

This is updated every hour in the cvlog.