Hi, I have two input files.
File1:
ID Name Place
1-234~name1~Newyork
1-34~name2~Boston
1-2345~name3~Hungary
File1 is a variable length file where each column is seperated by delimitter "~".
File2:
ID Country
1-34<<11 SPACES>>USA<<7 spaces>>
1-234<<10 SPACES>>UK<<8... (5 Replies)
Hi guys,
I have tried to find a solution for this problem but couln't. If anyone of you have an Idea do help me.
INPUT_FILE
with three columns shown to be separated by - sign
A5BNK723NVI - 1 - 294
A7QZM0VIT - 251 - 537
A7NU3411V - 245 - 527
I want an output file in which First column... (2 Replies)
Hi Friends,
Need some help in AWK.
Working on AIX 5
Have been trying the following functionality to make the record length fixed:
if( length(record) < 300 )
{
printf("%-300s\n", record);
}
In my opinion it will apply some fillers in the end.
Its is not making any... (4 Replies)
Hi,
I tried the below piece of code for my script to check whether it has a blank space for a particular field.
if(f10==/]/){
print "Field 10 is Correct";}
else{
print "Field 10 is Wrong"; }
Please help me to know whether the "if" condition applied here is correct or do i... (14 Replies)
Hi,
I have a fixed length file where I need to verify the values of 3 different fields, where each field will have a different value.
How can I do that in a single step. (6 Replies)
I have a CSV file that is missing quotes around a column that contains text with commas. Example:
Column1, Column2, Column3, Column4, Column5, Column6
Data1, Data2, Data3, Data, 4, Data5, Data6
Data1, Data3, Data3, Data, text, 4, Data5, Data6
I think the easiest way for me to fix this is to... (2 Replies)
Hi ,
I need to extract data from below mentioned data, having no delimiter and havin no fixed column length.
For example:
Member nbr Ref no date
10000 1000 10202012
200000 2000 11202012
Output:
to update DB with memeber nbr on basis of ref no.
... (6 Replies)
1|BANG|KINR|3456
2|BANG2222|KINR|347
3|BANG|KINR|347
4|BANG|KINR|347
5|BANG|KINR|347
6|BANG|KINR|347
awk -F"|" ' length($2)>=4||length($4)>=4 {print $0 >"above.txt";next}' test1.txt
i want required output,because if the 2nd column more than 4 character or 4th column more than 4... (5 Replies)
Hi all...
i have been trying to make this work but I have been failing for 6 hours ..
I know it should be something simple that I am missing to it would be great if you can help me ...
I want to subtract a fixed value (lets set 1) from any value >=1 from the whole file
my file looks like
... (4 Replies)
Discussion started by: A-V
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)