File size distribution

File size distribution is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

File Size Distribution

Beginning from the current directory, or optionally from a directory specified as a command-line argument, determine how many files there are of various sizes in a directory hierarchy. My suggestion is to sort by logarithmn of file size, since a few bytes here or there, or even a factor of two or three, may not be that significant. Don't forget that empty files may exist, to serve as a marker. Is your file system predominantly devoted to a large number of smaller files, or a smaller number of huge files?

zkl

<lang zkl>pipe:=Thread.Pipe();

   // hoover all files in tree, don't return directories

fcn(pipe,dir){ File.globular(dir,"*",True,8,pipe); } .launch(pipe,vm.arglist[0]); // thread

dist,N,SZ,maxd:=List.createLong(50,0),0,0,0; foreach fnm in (pipe){

  sz,szd:=File.len(fnm), sz.numDigits;
  dist[szd]+=1;
  N+=1; SZ+=sz; maxd=maxd.max(szd);

} println("Found %d files, %,d bytes, %,d mean.".fmt(N,SZ,SZ/N)); scale:=50.0/(0.0).max(dist); println("%15s %s (* = %.2f)".fmt("File size","Number of files",1.0/scale)); foreach sz,cnt in ([0..].zip(dist[0,maxd])){

  z:="%,d".fmt((10).pow(sz)).replace("1","n").replace("0","n");
  println("%15s : %s".fmt(z,"*"*(scale*cnt).round().toInt()));

}</lang>

Output:

$ zkl flSzDist.zkl ..
Found 1832 files, 108,667,806 bytes, 59,316 mean.
      File size   Number of files (* = 13.44)
              n : *
             nn : ***
            nnn : ********
          n,nnn : **********************************
         nn,nnn : **************************************************
        nnn,nnn : ********************************
      n,nnn,nnn : *******

$ zkl flSzDist.zkl /media/Tunes/
Found 4320 files, 67,627,849,052 bytes, 15,654,594 mean.
      File size   Number of files (* = 69.84)
              n : 
             nn : 
            nnn : 
          n,nnn : *
         nn,nnn : 
        nnn,nnn : 
      n,nnn,nnn : *
     nn,nnn,nnn : **************************************************
    nnn,nnn,nnn : ********
  n,nnn,nnn,nnn : *