1 .TH seeksize.d 1m "$Date:: 2007-08-05 #$" "USER COMMANDS"
3 seeksize.d \- print disk event seek report. Uses DTrace.
7 seeksize.d is a simple DTrace program to print a report of disk
8 event seeks by process.
10 This can be used to identify whether processes are accessing the
11 disks in a "random" or "sequential" manner. Sequential is often
12 desirable, indicated by mostly zero length seeks.
14 Since this uses DTrace, only the root user or users with the
15 dtrace_kernel privilege can run this command.
19 stable - needs the io provider.
22 Sample until Ctrl\-C is hit then print report,
32 command and argument list
35 distance in disk blocks (sectors)
38 number of I/O operations
41 See the DTraceToolkit for further documentation under the
42 Docs directory. The DTraceToolkit docs may include full worked
43 examples with verbose descriptions explaining the output.
45 seeksize.d will sample until Ctrl\-C is hit.
50 iosnoop(1M), bitesize.d(1M), dtrace(1M)