i have a input file which does not have a delimiter
All i Need to do is to identify a line and extract the data from it and run the loop again and need to ensure that it was not extracted earlier
Input file
------------
abcd 12345 egfhijk ip 192.168.0.1 CNN.com
abcd 12345 egfhijk ip... (12 Replies)
Hello,
I have got one file with more than 120+ million records(35 GB in size). I have to extract some relevant data from file based on some parameter and generate other output file.
What will be the besat and fastest way to extract the ne file.
sample file format :--... (2 Replies)
Hello
i have go the following result from performing 2 testing using the same file.
I have used unix script to extract the result because the files are many as shown below.
01_gravity.f.tcov 7 3 42.86
02_gravity.f.tcov 9 4 80.86... (4 Replies)
Hi,
I have long string in 2nd field, as shown below:
REF1 | CLESCLJSCSHSCSMSCSNSCSRSCUDSCUFSCU7SCV1SCWPSCXGPDBACAPA0DHDPDMESED6
REF2 | SBR4PCBFPCDRSCSCG3SCHEBSCKNSCKPSCLLSCMCZXTNPCVFPCV6P4KL0DMDSDSASEWG
I have a group of fixed patterns which can occur in these long strings & only... (11 Replies)
Hi all,
I got a file that contains the following content, Actually it is a part of the file content,
Installing XYZ XYZA Image, API 18, revision 2
Unzipping XYZ XYZA Image, API 18, revision 2 (1%)
Unzipping XYZ XYZA Image, API 18, revision 2 (96%)
Unzipping XYZ XYZA Image, API 18,... (7 Replies)
Hello,
Using the information in file 1, I would like to extract from file2 all rows which matchs in column 3.
file 1
1233
1230
1231
1232
file2
65733.00 19775.00 1220
65733.00 19793.00 1220
65733.00 19801.00 1220
65733.00 19809.00 1231
65733.00 19817.00 ... (2 Replies)
Hi All,
I am having a file like below . Basically when SB comes in the text with B. I have to take the word till SB. When there only B I should take take till B. Tried for cut it by demilter but not able to build the logic
SB- CD B_RESTO SB_RESTO CRYSTALS BOILERS -->There SB and B so I... (6 Replies)
Discussion started by: arunkumar_mca
6 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)