openisis/doc/limits.txt

$
lengths in bits

record length: 15       (32K)
        mfrl signed short in MST
        DOS version has 8K

mfn: 24 bit (16M)
        3 byte in IFP
        mfn long in MST

db size(record position): 29 bit (512M)
        xrmfb/xrmfp 20+9 in XRF

IFP occurence: 8 bit
IFP word count: 16 bit

#fields in FDT: 200
#lines in FST:  600
#stopwords: 799
#characters PFT: 10000
#characters PFT result: 64000

proposed limits:
record length: 24 bits (16M)
db size: 40 bit (1T)
index size: 32+13 bit (4G*8K blocks = 32T)
mfn: 32+8bit (256 databases per 4G records)

this needs 64 bit xrf (40pos+24len)
and 80 bit ifp
$
1	$
2	lengths in bits
3
4	record length: 15 (32K)
5	mfrl signed short in MST
6	DOS version has 8K
7
8	mfn: 24 bit (16M)
9	3 byte in IFP
10	mfn long in MST
11
12	db size(record position): 29 bit (512M)
13	xrmfb/xrmfp 20+9 in XRF
14
15	IFP occurence: 8 bit
16	IFP word count: 16 bit
17
18	#fields in FDT: 200
19	#lines in FST: 600
20	#stopwords: 799
21	#characters PFT: 10000
22	#characters PFT result: 64000
23
24	proposed limits:
25	record length: 24 bits (16M)
26	db size: 40 bit (1T)
27	index size: 32+13 bit (4G*8K blocks = 32T)
28	mfn: 32+8bit (256 databases per 4G records)
29
30	this needs 64 bit xrf (40pos+24len)
31	and 80 bit ifp
32	$