Hi,
I hope this is problem makes sense and that someone can offer some advice.
Basically i have a perl script which accesses a database and outputs the information to a file.
Is it possible to use a 'system' command to embeb some Unix command which moves that file to another directory... (3 Replies)
Hi guys am doing some checking inside my script and i want to redirect my output to a specific file for example checking if a move was successfully done and was writing on the screen whether the move was successful or not and now want to write same thing into a file...
I am new to shell... (2 Replies)
Is it possible to run <talk> such that both sides of the conversation are written to the screen and also to a file?
I use the utility to chat with collaborators and sometimes it would be nice to have a record of our conversation while we are problem solving.
I am running OS X, so <talk>... (4 Replies)
Hi
We are having a requirement where one shell script, say a.sh (which uses Java and connects to Oracle database using JDBC) keeps on running everytime. I created a wrapper (to check whether a.sh is running and if not then to start it) and scheduled it in the crontab. Now all the output from... (3 Replies)
Hi,
I am unable to get this script to work as desired. Basically, if an argument "log" is sent into the script, it outputs the result of the Make to a file output.log. However, if the argument is not passed, I want the output to be just put on screen (no redirection). See code snippet below.
#... (3 Replies)
Hi,
I want to redirect my script output to more than one file without printing the result to the screen. How to do that?
ex:
echo "hi" >> a.txt b.txt
cat a.txt
hi b.txt
:confused: (2 Replies)
Hi
Does anyone have any suggestions for capturing the output into a file when i run it through cron?
I have file called "quick.1" which contains two simple commands to be executed on the target host. And i have second file called "quick.2" which contains the wrapper script to ssh to the target... (1 Reply)
1. The problem statement, all variables and given/known data:
I'm having trouble redirecting the output of my sysinfo_page script into my sysinfo_page.html file. The task at hand is to be able to email both the html file and the script to myself. I'm assuming that the html should appear as a web... (8 Replies)
Hi,
I have created script which redirect the output to file.I am able to get the output in file but not in the format.
Output :Content of the log which have 10 -15 lines.
Actal :Line1 ..Line 2Line3 Line4 Line 5
Expected:Line1
Line 2
Line3
Please... (7 Replies)
Discussion started by: karthik771
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)