Hi,
Below is my script which creates a file:
#!/bin/sh
if
then
echo "Enter bill period "
echo "Syntax: sh cpd.sh G08"
exit
fi
sqlplus uname/pwd@dbname <<EOF
set WRAP off
set FEEDBACK off
set PAGESIZE 0
set VERIFY off (14 Replies)
Hi,
Lets say I have a few xml files:
1234567894.xml
abc_1234567895.xml
abc_000_1234567890.xml
abc_0000000_1234567893.xml
684_abc_000_1234567899.xml
The naming convention of the files is:
xxxxx_timestamp.xml OR timestamp.xml
where x can be anything
and I would like to order them by... (4 Replies)
Hi guys I need you ,please help me
i have to do this for tomorow and i don't understand how to do
Q1 : Order the words of RADIO.txt by frequency
Q2 : Order the words of RADIO.txt in alphabétique order
Q3 : Order the words of RADIO.txt par ordre "rhymique" (exemple, put togeder words which are... (1 Reply)
With an input file like this:
How can I get an output like this?
(In the quoted examples, the "_" sign represents an empty space)
Note that there are some minus signs and no spaces, in the example above the first character of the first line is an empty space, so each number spans 10... (16 Replies)
Is it possible to re-order certain rows as columns (of large files).
Few lines from the file for reference.
input
Splicing Factor: Tra2beta, Motif: aaguguu, Cutoff: 0.5000
Sequence Position Genomic Coordinate K-mer Score
97 chr1:67052604 uacuguu 0.571
147... (3 Replies)
Hi All,
I have directories under
/development/arun/weekly/
20120421
20120414
.
.
.
.
I need to arrange these directories in descending order.
folder name with recent date will be on top and then others. (1 Reply)
Hi,
Could some one please help to order the batch number in sequence.
I will be getting bunch of files with batch number in folder1 which are not in sequence.
I need to move all files from folder1 to folder2 with batch number in sequence.
Header record looks like
PROCESS1... (8 Replies)
Hello.
I have a script that writes parameters in alphabetic order.
But I have a parameter which have 3 lines. There is no continuation character ( '\' ). Each of the three lines finish with 'cr'. But line 2 and 3 of the concerning parameter start with a tab char (but should be one or more... (7 Replies)
Discussion started by: jcdole
7 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)