Hello,
instead of specifying the date manually in the list as below,
for dt in 010106 010206 010306 010406 010506 010606
here for example : 010106 - 1st jan 2006
how to retrieve the date of a week automatically and put in a loop?
is there any way to do?
thanks in advance. (1 Reply)
Hi. I have a situation where I need to constantly read a command's output in order to loop through it to determine something that is happening over our system. The command td <filename> interactively prints 'filename' as text is written to it and this is redirected to standard output. I have been... (8 Replies)
Friends,
I have a data with 3 columns:
30 41 1
39 19 4
14 25 3
....
....
.....
I want to retrieve any data in the first column that is greater 15. What is the best way to do this?
Thanks! (2 Replies)
Hi,
I am trying to get a small amount of files off of a SunBlade 2000 running SunOS 5.8, but I'm having trouble finding a medium that will actually work. It is not networked, and it doesn't have a writable CD drive. My only options seem to be floppy disk and USB drive. However, when I insert... (11 Replies)
Hi there, if i had a file that looked like this
my_server1
red
green
blue
yellow
blue
my_server2
blue
blue
yellow
green
blue
my_server3
yellow (9 Replies)
Hi .,
I have 3 records in a oracle table... wen i connect to oracle from unix environment and query the table i get some errors...
the script i used is
g=`sqlplus -s "username/password" << EOF
select column from table;
EOF`
if
then
echo $g
fi
The output i get... (1 Reply)
Hi All..
I have a Filename as
FAB1_600015_CONRAD.A0_7XYZ12345.000_LT-SWET.01_LTPA25L_20110622-161429_07_WFR12345_20110622-161429_20110712-125228.data.dis
I want to get the result as... (5 Replies)
I have input file like
AAA
AAA
CCC
CCC
CCC
EEE
EEE
EEE
EEE
FFF
FFF
GGG
GGG
i was trying to retrieve data between two strings using sed.
sed -n /CCC/,/FFF/p input_file
Am getting output like
CCC
CCC
CCC (22 Replies)
Hi
I have a script which am trying to pass an argument which am trying to call using $1 but its not taking the value inside the if loop as it showing the error as if: Empty if..
Any help on this will be helpful.
#!/usr/bin/csh
echo $1
if ('$1' == "pp")
then
echo "Printing $1"
endif (4 Replies)
Discussion started by: rogerben
4 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)