I have an HTML form that sends email to a large list of users one at a time by matching an email address in peoplesoft to their username. It works great, except that special characters are converted to %## format. Is there a library of these I can use to sed them back (yes this is a crappy UNIX... (1 Reply)
Data in File
ABC:DEFGHI:123
ABCZYE:DEFI:123
ABCFGD:DEF:123
ABCEERRRRR:DEFGHI:123
Expected Format
1 ABC DEFGHIFE 123
2 ABCZYE DEFI 123
3 ABCFGD DEF 123
4 ABCEERRRRR DEFGHI 123
However when i enter the following... (2 Replies)
Hi,
Basically what I am trying to do is the following.
I have created a shell script to grab timetabling information from a website using curl then I crop out only the data I need which is a table based on the current date. It leaves me with a file that has the table I want plus a small amount... (2 Replies)
Hi,
I am having couple of files which i used to copy from windows to Linux, so now in case of text files (CTRL^M) appears at end of line. I know i can convert this windows format file to unix format file by running dos2unix.
My requirement here is that i want to do it automatically using a... (5 Replies)
Hi All,
I am trying to write a shell script which takes parse the web form find the input field and dump the data of that field into one xml file. The form looks like,
<input type="button" id="btnSave" value="Save" onclick="saveXmlData()"/>
<form name="submitForm"... (1 Reply)
I have a .CSV file (file.csv) whose data are all enclosed in double quotes. Sample format of the file is as below:
column1,column2,column3,column4,column5,column6, column7, Column8, Column9, Column10
"12","B000QRIGJ4","4432","string with quotes, and with a comma, and colon: in... (3 Replies)
Hi,
I have a csv file from which i am fetching few columns as below:
IFILE=/home/home1/Report1.csv
OFILE=/home/home1/`date +"%m%d%y%H%M%S"`.dat
if #Checks if file exists and readable
then
awk -F "," '(NR>4) {print $1,$6,$2,$3,$4,$5,$6}' ${IFILE} >> ${OFILE}
fi
cat $OFILE | mail... (7 Replies)
I have an input form with several fields. What I would like to achieve is to auto populate or copy certain fields if they are empty when the form is submitted. I would like to use php if not then javascript but not jquery if possible - I have sort of had a go but I really have no idea... (4 Replies)
Hello guys,
I want to parse a JSON file in order to get the data in a table form.
My JSON file is like this:
{
"document":{
"page":
},
{
"column":
}
]
},
{
... (6 Replies)
Discussion started by: Gescad
6 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)