A set of 4 code pieces to compare a number(k) of file systems in parallel using Pthreads and OpenMP.

1. A make file

2. 4 .c files -

   i) CompareFS(K)Pthread.c [C code of parallel program for comparing k filesystems using the Pthread library]

   ii) CompareFS(K)OpenMP.c [C code of parallel program for comparing k filesystems using the OpenMP library]

   iii) CompareFS(K=2)Pthread.c [C code of parallel program for comparing 2 filesystems using the Pthread library]

   iv) CompareFS(K=2)OpenMP.c [C code of parallel program for comparing 2 filesystems using the OpenMP library]

1. $make on the prompt.

2. Example runs for the three code files - (All input is taken using command line)

   i) ./ComparePthreadK k <full path of fileSys 1> <full path of fileSys 2> <..> ...

   ii) ./CompareOpenMPK k <full path of fileSys 1> <full path of fileSys 2> <..> ...

   iii) ./ComparePthreadK2 <full path of fileSys 1> <full path of fileSys 2>

   iv) ./CompareOpenMPK2 <full path of fileSys 1> <full path of fileSys 2>

1. For the programs taking as input k file systems,

FILE in FSs // If a majority of the file systems have a file with the same contents. FOLDER IN MAJORITY : in FSs // If a majority of the file systems have the same directory content-wise & name-wise.

At the end,

IDENTICAL // If all file systems are completely identical content-wise and name-wise. DIFFERENT // If there is a difference.

If the is no folder/file with a majority, the filesystems are divergent.

2. For the programs specific to 2 file systems,

Both FSs DIR : //If both file systems have a directory with same name in same level Both FSs FILE : //If both file systems have a file with same name and contents in same level Both FSs HAVE FILE : BUT WITH DIFFERENT CONTENT ONLY FS 1 DIR : ONLY FS 2 DIR : ONLY FS 1 FILE : ONLY FS 2 DIR :

At the end,

IDENTICAL FILESYSTEMS // If both file systems are completely identical content-wise and name-wise. DIFFERENT FILESYSTEMS // If there is any difference

1. While running the program, give paths of root directories without an ending '/'. For ii) and iii) Give the number of filesystems (k) too as command line arguments.

2. Directories are expected as input. File (Non-directory) names are not to be given.

3. The 2 C codes specifically for 2 file systems was written earlier. The general case of k filesystems was designed later, The general solution for k filesystems can be used for 2 filesystems, by simply assigning k = 2, but there is performance benefit in the 2 programs written specifically for k = 2. This performance benefit is not present in the general solution for k file systems.

1) The program is not scalable and some modifications(replacing the empty while loops with conditional locks) will make it scalable
2) There is one bug in the 2 programs for k filesystems. They don't give the exact output when k = 2. This will be corrected in future.
3) Will shortly upload a document explaining the design of the solution and add more comments to the code.