Hi
I have a file with contents like
china
india
france
japan
italy
germany
.
.
.
.
etc....
I want the output as
china|india|france|japan|italy|germany|.|.|. (3 Replies)
I am creating a report in groff and need to format data from a file into a
table cell.
Sample data:
dador,173323,bpt,jsp,39030013338878,1
dador,173323,brew,jsp,39030013338860,1
dador,173323,brew,jsp,39030013339447,1
dador,173323,brew,jsp,39030013339538,1
I would like to build a table... (12 Replies)
Hi,
I'm trying to generate a distance matrix between sample pairs for use in a tree-drawing program (example below). The example below demonstrates what I'd like to get out of the data - essentially, to calculate the proportion of positions where two samples differ.
Any help much appreciated!... (1 Reply)
Hi I want to replace single quote with two single quotes in a perl string.
If the string is <It's Simpson's book> It should become <It''s Simpson''s book> (3 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Hi All,
I am new to unix, my requirement is like need to find the files like DATA_FUNCTION* and put those... (1 Reply)
hello all,
i have an input file like that
A A X0
A B X1
A C X2
...
A Z Xx
B A X1
B B X3
....
Z A Xx
Z B X4
and i want to have an output like that
A B C D
A X0 X1 X2 Xy
B X1 X3 X4 (4 Replies)
Hola Greetings Experts ,
I have records spreaded across multiple lines. in attached log.txt i want output to be in 1 line like this below Atached as Output.txt.
In brief
Output related to 1 line is spreaded across multiple row I wanted it to be in 1 row .
Please opem the file in notepad... (4 Replies)
Hi,
I want to change a file file1.txt:
1234
3456
2345
6789
3456
2333
4444
As, file2.txt in Linux:
'1234','3456','2345','6789','3456','2333','4444'
Could someone please help me. (Single liner sed, awk will be welcome!) (7 Replies)
Hello,
I have a text file as:-ABC
BCD
CDF
DEF
EFGI need to convert as 'ABC', 'BCD', 'CDF', 'DEF', 'EFG' using a unix command
anybody can help me out on this.
Regards,
Jas
Please wrap all code, files, input & output/errors in CODE tags.
It makes them easier to read and preserves... (12 Replies)
Hi Experts,
I am querying backup status results for multiple databases and getting each and every database result in one csv file. so i need to combine all csv files in one excel file with separate tabs. I am not familiar with perl script so i am using shell script.
Could anyone please... (4 Replies)
Discussion started by: ramakrk2
4 Replies
LEARN ABOUT DEBIAN
bup-margin
bup-margin(1) General Commands Manual bup-margin(1)NAME
bup-margin - figure out your deduplication safety margin
SYNOPSIS
bup margin [options...]
DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two
entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.
For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit
hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
its first 46 bits.
The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits,
that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
with far fewer objects.
If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if
you're getting dangerously close to 160 bits.
OPTIONS --predict
Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
from the guess. This is potentially useful for tuning an interpolation search algorithm.
--ignore-midx
don't use .midx files, use only .idx files. This is only really useful when used with --predict.
EXAMPLE
$ bup margin
Reading indexes: 100.00% (1612581/1612581), done.
40
40 matching prefix bits
1.94 bits per doubling
120 bits (61.86 doublings) remaining
4.19338e+18 times larger is possible
Everyone on earth could have 625878182 data sets
like yours, all in one repository, and we would
expect 1 object collision.
$ bup margin --predict
PackIdxList: using 1 index.
Reading indexes: 100.00% (1612581/1612581), done.
915 of 1612581 (0.057%)
SEE ALSO bup-midx(1), bup-save(1)BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown-bup-margin(1)