Hi
I am new to this forum.I need a help in the following:
We receve pipe delimited file with
transaction ID,tran_date,Quest_cd,Ans_cd,ans_value.
Same transaction ID can be repeated with different quest_cd and ans_cd.
Basically I need to check if a perticular pair of quest_cd and ans_cd... (1 Reply)
How to validate a date and optionly a time in shell scripting when i get the date and time as pararmeters that sent out with the call of the file? (in my case sh union.sh `first parameter ,second parameter...` (4 Replies)
Hi,
Can anyone provide me the code snippet for EMail Address Validation.
User is going to enter the email address in form window. I need to validate the format is correct.
Thanks in Advance
BS (3 Replies)
Hi All,
I have a shell script in Linux and it will be invoked by 2 methods,
1) An automated background process .
2) Logining into the box and directly executing the script.
I need to put a validation in my shell script such that it will be executed successfully on when an... (11 Replies)
Hi All,
I am a newbie...I would like to have a function which ll check if a file contains valid strings before "=" operator. Just to give you my requirement:
assume my file has content:
hello= gsdgsd sfdsg sgdsg sgdgdg
world= gggg hhhh iiiii
xxxx= pppp ppppp pppp
my... (1 Reply)
Hi All,
I am completely new to Unix Shell Scripting.
I m validating(Basic File Validation) an .HHT file in TIBCO.
After that i need to do Data Validation through UNIX Shell scripting.
Rules in DataValidation:
1.) Need to Check Every field wheather it is a Char or Number?(Fields are... (1 Reply)
Hi,
I need a script which do below
I have one process which runs 24*7 daily and I always has to monitor it now i want to have this automated such that if it stops at anytime we get a exception mail.
For example i use ps -ef|grep 'etl'
above command gives me the desired output.
... (7 Replies)
I need help with one of my shell script. The script is working fine but i need to add two condition -
i need to get rid of all the below ftp messages and need to have only ftp completed or failed message.
example when i run the script i get below lines -
Connected to xxxx
220 (vsFTPd... (1 Reply)
hello every one
I wrote the script to validate all the urls from my server . sourcing text file which contains the list of urls and trying to check every url and based on response printing url is up or not. the issue when i use the below code with url is printing url exist and and in loop it's... (3 Replies)
Discussion started by: markjohn1
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)