Hi everybody,

I want some help in finding a approximate value of the extents file. Let me describe it... I HAVE the following information

-->> Total no. of directories present in the volume

-->> Total no. of files with their full path and size in bytes.

-->> The total amount of space needed for the data of those files.

Problem faced :: Till now I used to find the total volume size first since i knew the size of each file. And then as in the Linux implementation they keep 1/128 th part of the Volume size as the size of the Catalog File The problem was when I used to select some directories for eg. DDK folder whose total size is around 58 MB and has around 4300 files in 300 directories. The Catalog file size decided upon the volume size would fill before all the entries were made and hence I would be left wtih an incomplete filesystem.I manipulated with different fiqures for the Catalog file size but it was more a hit and trial method.I know that Catalog File has information of the whole directory structure of the volume in a B* tree format. I also know at any given timeshot the B* tree will be around 2/3 rds full.

I now know the size of the Catalog File depends actually on the no. of File and Directory entries rather than the full Volume size. So, can anybody give me a simple formula ( may be a good approximation) in trying to find out the Catalog File size needed for a given volume when I have the information as mentioned above. Such that the file size may be bigger than actually needed but not exceedingly big. In other words is there any way to find out the size from no. of Directory entries and file entriee???

Waitng for help .

Bye Biswaroop

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