Vdbench 50404rc2 beta code - sparse file creation -

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can please let me know pointers create sparse files(holey files) in latest vdbench 50404rc2. seems latest supported feature.

link more info: https://community.oracle.com/thread/3759500?start=0&tstart=0

the answer given henk, on oracle vdbench forum posting excerpt it,also below link forum post.

this experimental, work now, once feedback , decide experiment successful change instructions activate it. means '-d86' info below no longer work.
activate truncate, add '-d86' execution parameter, or, add 'debug=86' @ top of parameter file. (for experiments adding other 'debug=' parameter easier fiddling vdbench parameter parser. if decide make permanently available i'll worry adding more 'official' parameter.)
uses unix 'ftruncate()' , similar windows function during file creation. create sparse files during format, not 1 block of data written until further vdbench workloads run against these files.

the definition file.

debug=86 fsd=fsd1,anchor=/tmp/sparsedir,depth=1,width=1,files=10,size=40k fwd=fwd1,fsd=fsd1,operation=read,xfersize=4k,fileio=sequential,fileselect=random,threads=1 rd=rd1,fwd=fwd1,fwdrate=max,format=yes,elapsed=10,interval=1


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