I have a file like the following
aaaaa00005bbbbb
aaaaa00108bbbbb
The code "00005" and "00108" need to be validated and the list of valid codes are stored in a database.
While I loop through the file, should call a sql statement for every records to do the validation? or is... (1 Reply)
Dear All,
Need your help.
In my day to day activities I have to validate/search Excel Sheet data (eg.say Application No. 0066782345) data into the Unix environment file whether the same data is present in that file or not.
There are hundreds of records coming in excel file and I am doing grep... (1 Reply)
Hi All,
I need to maintain a AUDIT file in system for every incoming and outgoing file. For this i am trying to append a record by using the AWK every time the file arriving.
I have used the code as below.
AWK '{print "FILENAME IS", $1,"DATE IS", $2}' >> AUDITFILE.txt
$1 and $2 are global... (1 Reply)
I am trying to write binary data to a file. My program below:
#include <stdlib.h>
#include <stdio.h>
struct tinner {
int j;
int k;
};
struct touter {
int i;
struct tinner *inner;
};
int main() {
struct touter data;
data.i = 10;
struct tinner... (4 Replies)
Hi All
I am reading data from the database and writing to temporary file in the below format.
1=XP|external_component|com.adp.meetingalertemail.processing.MeetingAlertEmail|EMAILALERTPUSH|32|4#XP |classpath|/usr/home/dfusr/lib/xalan.jar:
/usr/home/dfusr/lib/xerces.jar: ... (2 Replies)
I have a table with one column
File1.txt
1
2
3
4
5
6
7
8
9
10
Another table with two columns; This has got a subset of entries from File 1 but not unique because they have differing values in col 2.
File2.txt
1 a
2 d
2 f
6 r
6 e (3 Replies)
I am having an input file for eg. file.txt which contains pipe delimited rows
file.txt:
xx|yyy|zz|12|3|aaaaa|.....
yy|zz|1|3|4|xxxxx|.......
.
.
.
i want the above file name to be transformed into another file with giving input from the user and replacing the corresponding fields based... (5 Replies)
can someone please help me fix this command:
somecommand.sh | awk -F"---" 'BEGIN{count=0} /P/ && /ERROR/ {if (($3 ~ /^P$/) && ($6 ~ /ERROR/)) {print; count++ }END { print count } ;}'
basically, what i'm attempting to do here is print all the matching lines, then, at the end, print the total... (2 Replies)
Hi
I am trying to write output to a file in columns
I have file in the follwoing:
# cat file
abc
def
#
I am trying to write next output as like
# cat file
abc 123
def 345
#
:mad: (6 Replies)
Discussion started by: Priya Amaresh
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)