I have a question about the program I am making. I finished it, compiled it, and there were no errors. Now when I run it, the comand prompt comes up and there are just 1's and 0's that keep looping over and over again. The program is listed before. If anyone has any suggestions I would greatly... (2 Replies)
I need some help. I been doing system admin for the last several years and gotten very rusty on scripting. I need to write a script that will take a log entry and do math using two columns of data to create a new column. I am taking the column(#2) that contains the time and the column(#5) that... (3 Replies)
Hello
there are different opinions on how to get the swap space on Solaris.
some say: swap -s and the space= used + available
others say swap -l (donno how they get the swap size)
other say 'top' command
others say using format command (in print sub-command)
Could you please advise on... (1 Reply)
The formula below will calculate a distance in miles between 2 points in excel. Can some put it to work in unix?
Lat = 43.335
Lon1 = -70.9884
Lat2 = 43.4829
Lon2 = -71.246
distance... (8 Replies)
Hello Unix gurus,
Can anyone tell me the most efficient way to create script for the formula?
Formula:
Ans = 1 - ((Buffer pool data physical reads + Buffer pool xda physical reads + Buffer pool index physical reads + Buffer pool temporary data physical reads + Buffer pool temporary xda... (6 Replies)
I'm new to Perl, but I need to use it to write into an excel spreadsheet. I want to copy the values of certain cells into a new sheet in the workbook. I'm unsure of how to do this because I don't know how to copy values instead of formulas.
Note: by formula I mean '=SUM(A1,A2)' and by value I... (0 Replies)
Dear all,
I got a template excel file which contains several worksheets. Each worksheet contains some formulas in the cells.
I am using the perl script to read a CSV file and then put the data of CSV into template excel file(first worksheet) and then save it as new file name using ... (0 Replies)
Hi all,
I use "Spreadsheet::ParseExcel::SaveParser" to
- read a existing excel file with :
$Parser = Spreadsheet::ParseExcel::SaveParser->new();
$HeaderFile = $Parser->Parse("XLS_FILE_ACCESS");
- modify some values in somes cell with :
$worksheet->AddCell($row_target,$col_max,... (3 Replies)
Dear Masters,
Kindly need your helps for this issue..
I face a formula as a picture...
the input file is
A DEPT Vp Vs rho VPperVS
------------------------ ------------ ------------ ------------
700 151.9218 121.9269 ... (11 Replies)
Hi There,
Just curious here...
If there formula to calculate scan rate on solaris?
Thanks
Edy (3 Replies)
Discussion started by: edydsuranta
3 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)