its only working for this eg. but not for my database of 80000
As you have used here ":" as feild seperator. but column 2 of fileD can be present anywhere before or after of any symbols . i will like to give my files as
fileB :
this is not a csv file or it does not contain any seperator. its just a file.
and my fileD is as follows
this is a csv file . so now i want to compare this file first value of fileD ie "PRMKONF-RBO-01.00.13.00" in fileB. now if it is found in fileB whole line is copied and checked for second column of "PRMKONF-RBO-01.00.13.00" if this second column is present in that line or not. ie second column is PROD . so if this PROD is present in that line than it is not redirrected for output. if this is not present in that file then that row from fileD is redirected for output.
so output shall be
this PRMKONF-RBO-01.00.13.00 PROD is not outputed as "PRMKONF-RBO-01.00.13.00" is present and that line contains "PROD".
and also PRMKONF-RBO-01.00.13.00 can be present in many lines of fileB and each line should be considered for checking second columns of fileD.as for above example
"PRMKONF-RBO-01.00.13.00" was present in two line as
:) Hi
i am trying to convert a file which is in UTF8 format to ANSI format i tried to use the function ICONV but it is throwing error
Function i used it as
$ iconv -f UTF8 -t ANSI filename
Error iam getting is NOT Supported UTF8 to ANSI
please some help me out on this.........Let me... (1 Reply)
:confused: Hi
i am trying to convert a file which is in UTF8 format to ANSI format i tried to use the function ICONV but it is throwing error
Function i used it as
$ iconv -f UTF8 -t ANSI filename
Error iam getting is NOT Supported UTF8 to ANSI
please some help me out on... (9 Replies)
Hi
I have a file which has ascii , binary, binary decimal coded,decimal & hexadecimal data with lot of special characters (like öƒ.ƒ.„İİ¡Š·œƒ.„İİ¡Š· ) in it. I want to standardize the file into ASCII format & later use that as source .
Can any one suggest a way a logic to convert such... (5 Replies)
Hi,
I have a file which contains more than 1 lakh records like following:
a. name, id, city, state, country, phone (Expected I/P file format)
name, id, city,, state, country, phone (Current I/P file format )
I want to achieve following tasks,
a, Remove the extra comma in the... (1 Reply)
Hi i have 2 csv files a.csv and b.csv with the same number of columns and a list of values in both of it. Each and every individual value in both the files need to compared and if it matches then print correct in a new csv file otherwise print Incorrect
eg
a.csv
1,12/27/2007,Reward,$10.00... (5 Replies)
Hi All,
Is there any way to convert a file which is in UNIX format to a PC format....
Flip command can be used , apart form this command can we have any other way.... like usinf "awk" etc ..... main purpose of not using flip is that my Kshell doesnot support this comamnd.... (1 Reply)
Hi All,
Is there any way to convert a file which is in UNIX format to a PC format....
Flip command can be used , apart form this command can we have any other way.... like usinf "awk" etc ..... main purpose of not using flip is that my Kshell doesnot support this comamnd.... (2 Replies)
Hi,
I am having couple of files which i used to copy from windows to Linux, so now in case of text files (CTRL^M) appears at end of line. I know i can convert this windows format file to unix format file by running dos2unix.
My requirement here is that i want to do it automatically using a... (5 Replies)
Hello Everyone,
I have one source file which is genarated by SAP in different format(Which I've never seen). I need to convert that file to required format and I need to read this target file from Datastage to use this in my Jobs. So I do not have any other options except to use Unix script to... (4 Replies)
Discussion started by: Prathyu
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)