There are several approaches to monitor the single volume workload in current Applogic 2.x and 3.x version.
One popular approach is to use MON appliance but it requires to connect MON appliance to the appliance which is to be monitored and restart whole app.
Another approach is to execute "xentop -f -x" on dom0 to display volume read request number(VBD_RD) , write request number(VBD_WR) , read sector number(VBD_RSECT) and write sector number(VBD_WSECT). The weakness of this approach is it's hard to find the relationship of virtual block device and drive number attached to appliance, so difficult to locale the specific volume if appliance has multiple volumes.
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