First I' d like to say you guys are awesome. :)
I have a word document that I cut and paste into Textpad and it removed all the fancy formatting which is fine with me. I WinScp'd it to the box and and called it inputfile.txt.
Opened it in vi and don't see any special characters or stuff that... (2 Replies)
Hi,
I need help in unziping input file through shell script.
I had written script, which checks for input file extention.
If Extension is "zip" or "gz", then I want to do unzip/uncompress that file.
Caould you please let me know that, How to unzip a file through shell script (ksh).
Thanks... (16 Replies)
Hi,
I have a ksh script where I have an awk statement to exclude a few items... but my "few items" has now grown substantially and I'm looking for a nice compact way of doing this. Maybe putting the exceptions into a file or something? Any suggestions greatly appreciated.
# Excluded items... (1 Reply)
Dear Members,
I am using the attached script to convert a input file delimited by '|' to excel.
However, while processing the attribute change_reason, the whole content of the text under change_reason is not displayed completely in the cell in excel. It is truncated after only first few words.... (1 Reply)
Hello there, I am posting to seek help with a KSH script,
I am making a simple calculation program where the user can enter as many numbers as they like, I am getting their input using the read command, however I am not sure how to repeat doing this and storing the input in to new variables... (7 Replies)
I've been asked if I can write a "quick" little ksh script that will do the following:
java java_class_file /dir/input_file.xml /dir/output_file.xml
I'm a complete newbie with ksh so any help would be appreciated.
This is on AIX and java is found in
/usr/java5/jre/bin/java (4 Replies)
Dear All ,
i stuck in one problem executing xml .. i have input xml as
<COMMAND name="ARRANGEMENT.WRITE" timestamp="0" so="initial">
<SVLOBJECT>
<LONG name="CSP_PMNT_ID" val="-1"/>
<MONEY name="CSP_CEILING" amount="0.0" currency="AUD"/>
... (6 Replies)
Hi,
I created a skript in ksh which generate a file with semicolon as separator, this is an example of the file a created:
example content file:
hello;AAAA;2014-08-17
hello;BBBB;2014-08-17
hello;CCCC;2014-08-17
I would need to compare the content in of the second column of this file... (3 Replies)
Hello,
I currently have very little experience with Shell scripting and trying to create a script for the purpose of collecting the size of a couple sizes on 4 different Hosts. The Idea is to collected the information from the files in which the script is kicked off on, store the values into... (17 Replies)
Discussion started by: Abstract3000
17 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)