Hello guys
I want to retrieve two data from a file, like this:
bash-2.03$ cat numtest
123456
123457
bash-2.03$ more ./test_num
#!/bin/bash
num1=
num2=
cnt=1
while read x
do
num${cnt}=$x
cnt=$(($cnt+1))
done <$1
echo $num1 "\n" $num2
But when i executed this script, error... (2 Replies)
How to write a shell script to retrieve datas from database after that this database are redirect to a excell sheet and then i got a mail that gives details about the database with the column name and data..
I m using oracle 9i...
Thanks,
Anup Das (2 Replies)
Hi All,
It takes around one hour to retrieve 3 lakhs data from DB. I feel this can be still more reduced, please help me in improvising the below code, to get it retrieve faster, atleast 30 to 45 minutes.
sqlplus -s ${OCAU_DB_UNAME}/${OCAU_DB_UPSWD}@${OCAU_DB_NAME} > /apps/data/filedata.txt... (4 Replies)
I am a newbie to Unix and slowly learning it. I have a large data set with 8 different columns. I want to compare two columns and retrieve data if the two columns have similar number.
I have attached the example. There are two columns (S-Contig and N-Contig). I want to retrieve the data from... (7 Replies)
Hello Experts,
I have come back to this forum after a while now, since require a better way to get my result.. My query is as below..
I have 3 files -- 1 Input file, 2 Data files .. Based on the input file, data has to be retreived matching from two files which has one common key..
For EX:... (4 Replies)
Hello
Please I ask if it is possible to recover data that is stored on a remote machine that I access via ssh on a usb ? if so, how?
Thank you so much (5 Replies)
I would like to recover the data from 3 text tags.
These three markers are located between the tags specific location <tag1> and </tag1> knowing that they are in many places.
In File.txt:
<tag2>txt2</tag2>
<tag3>txt3</tag3>
<tag4>txt4</tag4>
....
<tag1>
<tag2>txt2</tag2>... (3 Replies)
Hi guys, I need your help.
I have two files:
file1
1
3
5
file2
1,XX
2,AA
3,BB
4,CC
5,DD
I would like to compare the first column and where they are equal to write that output in a new file:
1,XX
3,BB (7 Replies)
Hi Everyone,
I am looking for awk command to retrieve only the record number 23 and record number 89 from a unix file? Please let me know what is the awk command for this?
Regards
Rakesh (1 Reply)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
I am looking for awk command to retrieve only the record number 23 and record number 89 from a unix file?... (6 Replies)
Discussion started by: rakeshp
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)