Hi Gurus,
There is a ASCII file in which a comma is used as a seperator for the amount field when the amount exceed seven digits: e.g. 0001300,000. Now, this comma needs to be removed from this field, after padding leading zeros (to maintain the ASCII positions) e.g. 00001300000.... (1 Reply)
Hi All,
I am getting a xml file where the first field contains a carriage return and the all other fields doesnot contains any carriage return. So all the other records comes in the second line.
<?xml version="1.0" encoding="UTF-8"?>
<ns0:iSeriesCspIntegration... (3 Replies)
Hello, I'm having a problem figuring out the syntax for padding 10-99. Everything else in the program works fine so I want to focus in on just this part of the code. Below is a snippet of the code that I am having problems with. I appreciate all the help I can get. Thank you.
The script... (7 Replies)
Hi champs!
I have a fixed width file in which the records appear like this
11111 <fixed spaces such as 6> description for 11111 <fixed spaces such as 6> some more field to the record of 11111
22222 <fixed spaces such as 6> description for 22222 <fixed spaces such as 6> some more field to the... (8 Replies)
Hi,
I have a fixed length text file that needs to be cut into individual files in aix and facing padding issues. If I have multiple blank spaces in the file it is just making it one while cutting the files..
Eg:-
$ - blank space
filename:file.txt
... (2 Replies)
What's the best way to find a string in a very long file without newlines in Unix? The standard utility I'm aware of for finding a string in a single file is grep, but for a long file without newlines, I think the output is just going to be the input. I suppose I could use sed to replace the... (5 Replies)
Hello. I'm making a (hopefully) simple shell script xml parser that outputs a file I can grep for information. I am writing it because I have yet to find a command line utility that can do this. If you know of one, please just stop now and tell me about it. Even better would be one I can input... (10 Replies)
I need to remove new lines and carriage returns from csv file.
Is there anything other than sed and gwak by which we could achieve this ? Any suggestions ? (3 Replies)
Hi All -
I am in need of some help in formating the below file
Requirement -
1) replace newlines with space
2) replace '#~# ' with newline
-----------------------
sample inputfile a
I|abc|abc|aaa#~#
I|sddddd|tya|dfg
sfd
ssss#~#
I|tya1|tya2|dfg|sfd|aaa#~#... (5 Replies)
Hi Friends,
I have a data file with new lines.
How to remove the newlines and should be showed in one line.
I tried using the command
tr -d '\n' filename
sed 's/\n//g' file name
Ex: 1 abc hyd is actual record
but in our scenario showing it as
1 abc
hydthis record should be like... (5 Replies)
Discussion started by: victory
5 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)