I know this is probably much simplier than I am making but I need some help please. I have a data file that contains a value on the first line between double quotes ("00043"). I need to assign the value between the first set quotes to a variable in my perl script for comparison analysis. Also,... (6 Replies)
Hi,
I'm trying to insert double quotes right after the third delimiter in a file. Delimiter is ^Z.
For example:
Input:
Oct ^Z 1234 ^Z John ^Z Hello!"
Desired Output:
Oct ^Z 1234 ^Z John ^Z "Hello!"
Any ideas? (1 Reply)
Hi i have a file with follw data
"20090427","0","","16371311","-100200","","","","16371311","JUL","09"
In the 10th column i need to convert the month name into month number in this case JUL will be 7 and append the 10th and 11th column which shows me the output as 709. Can you suggest a shell... (11 Replies)
hi
Need to run below command on remote server:
cmd -a "1 2" -b 3
If i run below, there's clash matching double quotes and fail.
ssh $server "cmd -a "1 2" -b 3"
I have few ideas which worked (like keeping the entire cmd in a file and copy it to remote server and then run that file)... (1 Reply)
i want extract where the 2nd column having "3" or "7".
Based on the forums tried like this but it is not working
awk -F"," '$2=3;$2=7 {print}' filename
Source
"1","2","3","4"
"1","3","3","4"
"1","7","3","4"
"1","8","3","4"
"1","2","3","4"
"1","2","3","4"
Output :
... (5 Replies)
Hi All,
I'm stuck-up in finding a way to skip the delimiter which come within double quotes using awk or any other better option. can someone please help me out.
Below are the details:
Delimited: |
Sample data: 742433154|"SYN|THESIS MED CHEM PTY.... (2 Replies)
Hi All,
I'm unable to load the data using sql loader where there are double quotes within the double quotes As these are optionally enclosed by double quotes.
Sample Data :
"221100",138.00,"D","0019/1477","44012075","49938","49938/15043000","Television - 22" Refurbished - Airwave","Supply... (6 Replies)
Hello Team,
Could you please help me with the below question?
I have a file with the following properties
1) File Delimiter is ;
2) Text columns are within double quotes
3) Numeric columns will not have double quotes
4) File has total 6 columns
Please see a sample record from file
... (3 Replies)
Hi,
I've a requirement like, in a csv file of 30+ fields where all the columns are having double quotes I need to remove the double quotes from certain fields and certain field should remain as it is.
Eg:... (6 Replies)
Please use code tags
Hi,
I have input data is below format and n of column in the multiple flat files. the string data has any double quotes(") values replaced to double double quotes for all the columns{"").
Also, my input flat file each column string data has carriage of new line too.... (14 Replies)
Discussion started by: SSrini
14 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)