Hi All
How to get the difference between two dates in no of days ??? My date format is like this YYYY/MM/DD. I have to get the no of days between two dates in the given format.
I tried to search the forum but nothing came up similar to my requitement. Your help will be appreciated.
... (1 Reply)
Hello,
I would like to find out the number of days between two dates of the format yyyy-mm-dd.
Any help on this is highly appreciated.
Thanks. (6 Replies)
Hi I have the following issue.
the headeer in the file contains as follows
IMAHDR tsmdsl01 EMBS_DAT 20120911 20120911
233656S000000000000000 001
So the fifth field in the header is a string that represents the file arrival date.(20120911) yyyyMMDD
I just need to compare... (1 Reply)
I think both write at the end of the file ......
but is there a sharp difference between those 2 instruction .....
thank you
this is my 3rd question today forgive me :D (1 Reply)
Hi Guys,
Need a small help, how do i get the difference between two dates (in days) in KSH shell
My date is in mm/dd/YYYY format,
Is there a function to get time stamp from the respective date and time ( mm/dd/yyyy HH:MM:SS) (1 Reply)
Hi guys i need advice on the approach to this one......
I have a file say called
Thisfile.20130524.txt
i need to work out from the date 20130524 what day of the week that was and then process the file in 3 working days. (so not counting saturday or sunday....(will not worry about bank... (2 Replies)
Hi all,
I have a requirement to calculate the difference of number of days of time stamp of a file and system date and if the difference is greater than 15 days it should prompt as previous month file otherwise current month file.
Below is the code i used and it is working fine till now. (You... (2 Replies)
How to find a file that's modified more than 2 days ago but was modified less than 5 days ago by use of any Linux utility ? (4 Replies)
Discussion started by: abdulbadii
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)