Hi All,
I have huge xml file. The file contains some comment tags . I have requirement to replace comment tag with another comment tag.
Say for example : file X has -- Part of the file
<?xml version="1.0" encoding="ISO-2"?><translationResults jobDate="20070123 23:20:51"... (1 Reply)
i have a text file which domains something like this
123213213213/32434342
324324324/12312321321
12321321,435435435
12321312 / 12313213 / 12435435345
4353213 , 123213213213
21321321312-12334324
234324324 - 235645645645
456456456 - 45456456456 - 45645645654243
how can i replace '/' and... (4 Replies)
Hi, I have a script for replacing bad characters in filenames
for f in *; do mv $f `echo $f | tr '+' '_'`
done;
this replaces + for _
But I need to replace all bad characters ? / % + to _
Pls how can i do this in one script ? (3 Replies)
hi all
I have a file that has sone spaces in start then / at last. i want to get rid of this. how to do?
eg.
11414/
49878/
27627/
I WANT THE FILE AS
11414
49878
27627
PLEASE HELP (3 Replies)
Hi All,
I have a file which is delimeted with the character '. i need to replace this character with the same character and also a new line.
Can anyone please help me with the tr command for this.
Many thanks
Karan (11 Replies)
Hi All,
example data.log
526569346 66815531961 09
526569346 66815531961 09
526569346 66815531961 09
526569346 66815531961 09
526569346 66815531961 09
I want like this to
526569346|66815531961|09
526569346|66815531961|09... (4 Replies)
Hi,
I have a file with data as given below
$cat file1
123|abc|345
345|def|567
The first record is good record. The second record has an invisible junk character like \032.
I was replace all the occurences of that invisible character with #.
I want to do this for a set of... (16 Replies)
Hi All,
I'm using KSH and am writing a small script that counts the lines of various files in several folders under one root folder.
Below is the script:
#!/usr/bin/ksh
common_path_in="/interface_in/rsc"
file_out="/interface_in/rsc/record_count.csv"
tot_rec_count=-1
act_rec_count=-1... (5 Replies)
sed -e "s// /g" old.txt > new.txt
While I do know some control characters need to be escaped, can normal characters also be escaped and still work the same way? Basically I do not know all control characters that have a special meaning, for example, ?, ., % have a meaning and have to be escaped... (11 Replies)
Discussion started by: ijustneeda
11 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)