Hello people,
I am want to run a server on remote machine through perl scripting using telnet api. Now when I try to do so, the server gets started perfectly, but as soon as I close the telnet connection in the script, the server started on the remote machine suddenly goes down. I also... (0 Replies)
Hi,
I wish to execute a simple perl script to pass unix commands on a HPUX platform, retrieve the result and filter through the text to determine outcomes x,y and z. I am developing the code on my windows system.
I initially wrote the code to issue UNIX commands line by line, however i soon... (1 Reply)
I have a very basic perl script that attempts to find if a process is running. If the process is not running then the script is supposed to start the process. If I execute the script from command line it works fine as expected. However if the script is executed via cronjob, the script cannot find... (1 Reply)
While executing perl scriptit gives some compling issue, please help out
$inputFilename="c:\allways.pl";
open (FILEH,$inputFilename) or die "Could not open log file";
Error : Could not open log file at c:\allways.pl line 4
learner in Perl (1 Reply)
Executing two unix commads via perl script one after another
e.g: make clean
bsub -i -q short make
have tried using exec but the second command doesnt executes (1 Reply)
Dear fellow unixoids!
I need a little help (just a link would be fine) how can I investigate what specific perl script is eating 100% of cpu of my ubuntu server:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND ... (2 Replies)
I'm not sure if this forum covers PERL issues but here I go:
I'm trying to run a PERL script from Notepadd++. I've entered the path of the script from the run command but it is only opening a blank window. Is there anything else that needs to be done when using the 'RUN' feature of Notepad++? (2 Replies)
Hi All,
I have put a perl script together to go and collect some information from multiple nodes/endpoints. The script works absolutly fine however I want to make it quicker.
You will see in the below that my script calls an expect script called ssh_run_cmd2.exp followed by the IP of... (7 Replies)
Discussion started by: mutley2202
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)