I Have this code
while
do
column1=":`cat /home/test_inter.txt|head -${iCount1}|tail -1|cut -d "," -f2`"
columnA=$columnA$column1
iCount1=`expr ${iCount1} + 1`
done
echo $columnA (2 Replies)
Hi ,
I have below file with 13 columns. I need 2-13 columns seperated by comma and I want to append each row with a string "INSERT INTO xxx" in the begining as 1st column and then a variable "$node" and then $2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13 and at the end another string " ; COMMIT;"
... (4 Replies)
void remove_new_line(char *s) {
while (*s) {
if (*s == '\n') {
*s='\0';
}
s++;
}
}
// i tried this code for removing a \n from a string but its not working (12 Replies)
I have the text like:
DN11-001 Thats the first line which needs to be
DN11-001 joined with the second line and also to
DN11-001 the third line as they all begin with the same
DN11-001 document number.
DN11-002 The number of lines differ
DN11-002 among the documents.
DN11-005 It can also be... (10 Replies)
I am trying to extract a string from a line of text. Currently I am using
grep -o 'startofstring(.........'
The string is not always the same size.
The string I'm trying to extract starts with 'test(' ends with ')'.
ex "blah,blah,blah,test(stringoftext),blah blah"
How do I... (4 Replies)
Hi,
I am trying to remove lines once a string is found till another string is found including the start string and end string. I want to basically grab all the lines starting with color (closing bracket). PS: The line after the closing bracket for color could be anything (currently 'more').... (1 Reply)
What I need is to remove the text from Location_file.txt from each line matching all entries from Remove_location.txt
Location_file.txt
FlowPrePaid, h3nmg1cm2,Jamaica_MTAImageFileFlowPrePaid,h0nmg1cm1, Flow_BeatTest,FlowRockTest
FlowNewTest,FlowNewTest,h0nmg1cm1
PartiallySubscribed,... (3 Replies)
Discussion started by: ketanraut
3 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)