Not sure if this qualifies as "easy", but if you're the adventurous type:
I elaborate on how this works and the risks involved at the end of the post at https://www.unix.com/302407978-post5.html
hi everybody,
when i run and compile this:
printf("test"); fflush(stdout);
nothing appears on screen.
if i try this:
___________________________________
printf("test"); fflush(stdout); sleep(10);
___________________________________
then i can see the output "test"... for 10... (4 Replies)
I'm sittig behind a firewall that doesn't allow ftp. I have a conection to a UNIX system, connecting throug SSH. Is it possible to redirect the ftp through the UNIX to my computer? (1 Reply)
Hi,
I need some help to achive the follwoing task:
I have a file named test that contain the following line:
'Hellow world','good morning'
I want to attach the content of this file to a variable named var , and then rediarect it to a second file bamed test_new.
The result should look like... (2 Replies)
i have following statement in the script
echo -e "$str_XML_col_name:$str_field_type;" >> $i_DC_Key_$i_Tgt_DC_key_Schema
here $i_DC_Key is DC key and $i_Tgt_DC_key are the variables...............
when i ran the script i am getting error rec_merge.sh: $i_DC_Key_$i_Tgt_DC_key_Schema:... (1 Reply)
how do you redirect stdout into a variable. whenever I try I get an ambiguous redirect error :( I am trying to validate some user input and failing miserably.
cal $MONTH $YEAR | grep -c "$DAY"
if the above is 1 then it is valid if 0 then not valid. I have been trying to redirect the output... (2 Replies)
Hello experts,
I'm testing a program that prints error message to the screen.
I want to redirect the output to a file using >. but the message only prints on screen and not writing to the file,
Any suggestion on what I might try? (3 Replies)
Hi all,
I am new to linux and got problem with pthread_mutex_trylock(). I have used mutex in my code. When I try to call pthread_mutex_trylock() on RECURSIVE type of mutex it overwrites adjacent memory location (that is global variable of type structure say x, memory allocated using malloc()). ... (5 Replies)
I use sugarsync to sync my vimrc across computers. I keep the _vimrc file in a syncing folder and in my home folder, I have a symbolic link ~\_vimrc pointing to ~\Synced Docs\_vimrc. On my mac I have a .vimrc symbolic link pointing at the _vimrc file. On the pc side, every time I open the _vimrc... (3 Replies)
Hi
I have a working sendmail setup for my domain, but would like to run a subdomain on another machine. I could try below, but its a production server and worry about messing it up. Hence the question.
So I have machine names:
mydomain.com (mail server)
dev.mydomain.com
currently the... (1 Reply)
Discussion started by: gtrava01
1 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)