[ted%NMSU.Edu: ]

[Amos Shapir]

In article <19976 at adm.BRL.MIL> ted at nmsu.edu writes:
>i realize it is entirely out of character to provide in a
>unix-wizards discussion, but here is the result of just such a survey
>made on an active research machine with about 3GB of disk space in
>use.  these results were obtained by doing 
>
>	find / -print |sed -e 's/.*\///' |chars-in-line |sort -n |uniq -c
>
>where chars-in-line is a tiny program to count the characters on each
>input line.  the work was done as super-user to avoid directory read
>problems.

There's no need to use four tools (including a custom-built one) where
one will do.  The following awk program collects the same statistics;
put it in count.awk and run as 'find / -print | awk -f count.awk '.

BEGIN {FS = "/"}
{
	l = length($NF)
	c[l]++
	if(l>max) max=l
}
END {
	for(i=1; i<=max; i++) {
		s += c[i]
		printf("%2d %5d %5.2f%% %5d %6.2f%%\n", i, c[i], c[i]/NR*100, s, s/NR*100)
	}
}

I ran it on our system (Sequent Balance running Dynix) which also has some
3Gb of disk space.  Columns are: name length, no. of files of this length,
percentage of total, and a cummulative count of the last two.

 1  1126  0.38%  1126   0.38%
 2  2751  0.93%  3877   1.32%
 3 13531  4.59% 17408   5.91%
 4 26337  8.94% 43745  14.85%
 5 15983  5.43% 59728  20.28%
 6 25357  8.61% 85085  28.89%
 7 28932  9.82% 114017  38.72%
 8 44208 15.01% 158225  53.73%
 9 30821 10.47% 189046  64.19%
10 30394 10.32% 219440  74.51%
11 23427  7.95% 242867  82.47%
12 21944  7.45% 264811  89.92%
13 13172  4.47% 277983  94.39%
14  8939  3.04% 286922  97.43%
15  2342  0.80% 289264  98.22%
16  1639  0.56% 290903  98.78%
17   820  0.28% 291723  99.06%
18   580  0.20% 292303  99.25%
19   371  0.13% 292674  99.38%
20   223  0.08% 292897  99.46%
21   190  0.06% 293087  99.52%
22   120  0.04% 293207  99.56%
23   165  0.06% 293372  99.62%
24   133  0.05% 293505  99.66%
25    49  0.02% 293554  99.68%
26    21  0.01% 293575  99.69%
27    14  0.00% 293589  99.69%
28    18  0.01% 293607  99.70%
29    26  0.01% 293633  99.71%
30     8  0.00% 293641  99.71%
31    14  0.00% 293655  99.71%
32    26  0.01% 293681  99.72%
33     5  0.00% 293686  99.72%
34     6  0.00% 293692  99.73%
35    22  0.01% 293714  99.73%
36    85  0.03% 293799  99.76%
37    85  0.03% 293884  99.79%
38   116  0.04% 294000  99.83%
39   135  0.05% 294135  99.88%
40    65  0.02% 294200  99.90%
41    82  0.03% 294282  99.93%
42    84  0.03% 294366  99.95%
43    48  0.02% 294414  99.97%
44    20  0.01% 294434  99.98%
45    25  0.01% 294459  99.99%
46     7  0.00% 294466  99.99%
47    18  0.01% 294484  99.99%
48     9  0.00% 294493 100.00%
49     2  0.00% 294495 100.00%
50     0  0.00% 294495 100.00%
51     0  0.00% 294495 100.00%
52     0  0.00% 294495 100.00%
53     0  0.00% 294495 100.00%
54     1  0.00% 294496 100.00%
55     0  0.00% 294496 100.00%
56     0  0.00% 294496 100.00%
57     0  0.00% 294496 100.00%
58     1  0.00% 294497 100.00%
59     0  0.00% 294497 100.00%
60     0  0.00% 294497 100.00%
61     0  0.00% 294497 100.00%
62     0  0.00% 294497 100.00%
63     0  0.00% 294497 100.00%
64     1  0.00% 294498 100.00%

>the number of very long names is rather surprising (at least to me),
>but there is a good indication 255 = infinity as far as file names
>are concerned.
>
>hope this helps somebody.

Ditto.

-- 
	Amos Shapir				amos at nsc.com
National Semiconductor (Israel) P.O.B. 3007, Herzlia 46104, Israel
Tel. +972 52 522261  TWX: 33691, fax: +972-52-558322
34 48 E / 32 10 N			(My other cpu is a NS32532)