Block Level file copy

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Status:	Closed (Selected Service Provider)
Selected Providers:	selected service provider HussienSharaf
Budget:	$30-100
Created:	02/06/2007 at 6:43 EST
Bidding Ends:	02/16/2007 at 6:43 EST
Project Creator:	zenu   Buyer Rating: (2 reviews)
Description:	Hi, I need to be able to capture the changes between 2 files and save them to a 3rd diff file. Note that only the changes should be saved to these diff file. The catch is that I need this to support both small and large files and both text and binary files. Here is somemore details on how it should function... Scenario: souce file = d:testfile1.txt target file = g:backupfile1.txt versioned files = g:backupfile1.txt.b00, file1.txt.b01, file1.txt.b02, etc... Block level Copy function ============================ Block.Copy(src, tgt, append) src = File to process tdt = path to store copy of src append = True/False. If True append changes from src to tgt If False create separate diff files with ".bxxx extention to store each change. The xxx represents the version. Example: if g:backupfile1.txt does not exist Copy D:testfile1.txt to g:backupfile1.txt and subsequent changes to g:backupfile1.txt.b01, file1.txt.b02, etc... Block.Copy(d:testfile1.txt, g:backupfile1.txt, false) Block level Restore function ============================ Block.Restore(src, tgt, version) src = The first copy of the original file tgt = The path to recreate the original file in version = the point in time version to restore the file to. Example: Restore the 3rdt version of g:backupfile1.txt to d:testfile1.txt Block.Restore(g:backupfile1.txt, d:testfile1.txt, 3) I would expect that the solution will handle any file type (text, binary, etc.) The sizes may range from a few KB to 10GB+. The large files may be ISO images, outlook PST's, NT Backup .bk images, and a variety of other files. If the parameter "Append" = False Then The differential files (*.bxxx) should contain only the changes. So if I change the original by inserting "Zenu" only Zenu and minimal pointers are saved to the diff file. This is important because as if it is not done I could end up using too much disk space for the changes. If the parameter "Append" = True Then only append the changes to the target file and do not create additional diff files. The algorythm should be able to process any files with minimal Memory, and Disk utilization but at the same time be efficient. CPU utilization should be considered as well. Reagards, Zenu
Job Type:	.NET Visual Basic
Database:	(None)
Operating system:	MS Windows
Bid count:	1
Average bid:	N/A