Hi,
I have a file like this:
tag1:value1
tag2:value2
tag3:value3
tag1:value1
tag2:value2
tag3:value3
tag1:value1
tag2:value2
tag3:value3
and what i want is:
value1 value2 value3
value1 value2 value3 (15 Replies)
hi all,
i have variables a and b with values, like
a="/var/tmp/new.sh /var/tmp/new2.sh"
b="/TEST"
how i need to append the value "/TEST" before the values for the variable "a" so that i get the output as
/TEST/var/tmp/new.sh /TEST/var/tmp/new2.sh
plz help me
Regards,
NG (2 Replies)
Hi
I have the following issue
i am going to ask from the user the password
The password can have $ anywhere that is first last or in between but i have to append \ before the $ sign in the password can anyone please help
For example
o/p in the console will be like the... (3 Replies)
Hi,
I have below line from the config file
$__MR_CONFIG = 'userinput';
I want to get the value from the user for the "userinput" and then append the full line to another file.
Can you please let me know how can I proceed on this? I am new to unix and your help is greatly appreciated.... (3 Replies)
Hi,
I have the output (as below) which i want it to be in a table.
For e.g.
space utilization in PSE on path /logs is 0%
space utilization in PSE on path /logs/tuxedo/tuxlsp is 16%
space utilization in PSE on path /ldvarlsp/lsp/log is 37%
space utilization in PSE on path /home is 6%... (7 Replies)
Hello All,
Could you please help with this.
This is what I have:
506234.222 2
506234.222 2
506234.222 2
506234.222 2
508212.200 2
508212.200 2
333456.111 2
333456.111 2
333456.111 2
333456.111 2
But this is what I want:
506234.222 1
506234.222 2
506234.222 2
506234.222 3 (5 Replies)
Hi All,
I need help for doing the following.
I have a input file like:
aaaaaaaaaabbbbbbbbbbbbbbbbbbbb
cccbbbbbaaaaaadddddaaaabbbbbbb
now I am trying to generate a output csv file where i will have for e.g.
0-3 chars of each line as the first column in the csv, 4-10 chars of the line as... (3 Replies)
Hi,
Requesting some help with a problem I am facing with string function in UNIX. I wish to create 2 string variables: 1st header string containing output_1, output_2, .. , output_<n> and 2nd data string containing the filename separated by colon (":") and corresponding filesize separated by... (6 Replies)
hi. I have a requirement where I need to REPLACE all alphabets from an alphanumeric input string into their respective ASCII decimal value. For example:
If the input string is ABAC123, the output should be 65666567123
I am seeking a single line command, and I was trying searching for options... (21 Replies)
Discussion started by: kumarjt
21 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)