Take a look at the FileStream class. It gives you the possibility to Append to a file. I see how in the short term appending to a file (while causing fragmentation) is a speedy process but think about it in the long run; when you try to read the data from these files back they will be heavily fragmented and all the speed you've gained will be lost.
-Peter On 2/5/08, Michael Sharpe <[EMAIL PROTECTED]> wrote: > Is it at all possible to combine 2 (or more) data files together without > A) opening the data files to read and B) creating a "new" file out of > them? > > For example, lets say I have one file that is 20MB and a second file that > is 50MB. What I want to have happen is for the second data file to just > be appended to the first but without Windows or the file system having to > read any data. Basically I just want the FAT to take the 50MB file and > attach it to the end of the 20MB file as a file fragment. I suppose this > is more of a file join than an append. > > This is how it seems to work now: > File 1 + File 2 = > > 1) Create File 3 > 2) Read contents of File 1 into File 3 > 3) Read contents of File 2 into File 3 > > > This is how I want it to work: > File 1 + File 2 = > > 1) File 1 is left alone except for the EOF position. > 2) EOF position is removed from File 1 and is now an address pointer to > the start of File 2 > 3) File 2 has any header information stripped from it > 4) EOF becomes the end of File 2 > 5) File 1 is now a fragmented file since neither file is moved yet it > contains the contents of File 1 and File 2 > > > > > I know that there are some file systems available on other platforms that > can do this joining of files without the overhead of having to build a > file and read data into it. Is this at all possible in windows? I don't > care if it used .NET, C++, C, etc. > And I am aware that file fragmentation is not always a good thing but in > this case, I am more than willing to accept file fragmentation for the > speed especially when this needs to be done over many groups of files. If > this needs to be done on let's saw 1,000 files that are 120GB total in > size, I don't want the file system to rebuild 120GB of data that I already > have but is just in different pieces. I want to just stick the pieces > together. > > Thanks > Mike > > =================================== > This list is hosted by DevelopMentor(R) http://www.develop.com > > View archives and manage your subscription(s) at http://discuss.develop.com > =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
