Thanks for the reply. I was actually looking for one solution s u said for both the issues. But your code is not working as when i use RS and ORS i get error for some columns as specified below:
It seems i am using HP-UNIX that's why i cannot use the above code.
Do you have any alternative way so i could have one solution for both the issues.
---------- Post updated at 04:06 PM ---------- Previous update was at 03:50 PM ----------
Quote:
Originally Posted by Arun Mishra
Hi All,
I get a file on weekly basis from client. I need to write a script which make sure the file should have 20 columns after the first column. If not then the script should add the remaining columns and default them to space(except for 2nd and 3rd). and at the same time the script should check the second and the third column if null then default those to ND.
There is an addition to the requirement as Don Mentioned. The 4th field or any other existing field(apart from 2nd and 3rd which if null should be defaulted to ND) if null should also be defaulted to space along with the additional fields being added
Hi Everybody,
I have an layout file like below
f1 1 char 10,
f2 11 char 2,
f3 13 char 1,
lineend 14 char 1
Their I need to add a new field which would be like
f5 char 3,
f6 char 2
The o/p should be
f1 1 char 10,
f2 11 char 2,
f3 13 char 1,
f5 14 char 3,
f6 17 char 2 (3 Replies)
I have a file with 32 fields each separated by ‘|”. I need to add a file date exactly in the format “ "20100120" “ as the 32nd field moving the existing 32nd field to 33. so the field I added should be 32nd and the 33rd field is the last field before I added the file date.
I know we can... (8 Replies)
I need some help with adding lines to file and substitute a pattern.
Ok I have a file:
#cat names.txt
name: John Doe
stationed: 1
name: Michael Sweets
stationed: 41
.
.
.
And would like to change it to:
name: John Doe
employed
permanently
stationed: 1-office (7 Replies)
hi
i am student doing project in ns2.34.
i hav to add field in route cache and packet of DSR routing protocol.
which files hv to be changed...pl help me (1 Reply)
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:
want to add field to route cache and packet of DSR routing protocol in ns2.34, add field, DSR package in ns2.34... (2 Replies)
Hi All,
I have a file(Pipe Delimited) where i need to add a blank field before the last field and a blank field after the last field. Please help. I have provided below the sample input records and desired output.
Code:
Sample Input: A0010000|Abilene TX A 1|A0010957|Dallas... (0 Replies)
Hi All,
I have a file(Pipe Delimited) where i need to add a blank field before the last field and a blank field after the last field. Please help. I have provided below the sample input records and desired output.
Sample Input:
A0010000|Abilene TX A 1|A0010957|Dallas TX|A0010998|West|US... (5 Replies)
Dear AWK-experts!
I did get stuck in the task of combining files after matching fields, so I'm still awkward with learning AWK.
There are 2 files: one containing 3 columns with ID, coding status, and score for long noncoding RNAs:
file1 (1.txt) (>5000 lines)
... (12 Replies)
I have an array in an external file, "array.txt", which contains:
char *testarray={"Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine"};I want to be able to add an element to this array, and have that element display, whenever I call it, without having to recompile... (29 Replies)
Discussion started by: ignatius
29 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)