Thanks for the response. I ended up writing an entire script from scratch to do this dynamically. I think that the code that you have posted needs input for the 1/number_of_entries value each time.
sometimes in Solaris 8 when I go to mount filesystems using either the mount command or by editing the /etc/vfstab, i get a nice little error message saying the the number of allowable mount points has been exceeded. I have read man pages until I am blue in the face and no where can I find what the... (3 Replies)
I have a simple gnuplot question. I have a set of points (list of x,y,z values; irregularly spaced, i.e. no grid) that I want to plot. I want the plot to look like this:
- points in map view (no 3D view)
- color of each point should depend on its z-value.
- I want to define my own color scale
-... (0 Replies)
When taking a snap, I have a script that stops any active snap. When running the script, I'm getting a message that u02 and u04 are already mounted.
How can I find out what process(es) is/are latching on the these mount points?
Thank you for your time. (1 Reply)
Hi,
I am trying to write a script to get entries between two points lets say start and end points from a log file,
the log file time format is as follows
Start - 07/Aug/2008:18:26:43
End - 07/Aug/2008:19:36:43
I tried using the following awk command but it couldnt pick up the entries... (3 Replies)
hi,
I believe a mount point does not have to be a physical disk, but rather a logical one? Is this correct? if so, how can I find out if my mount points are on different physical disks?
thanks (9 Replies)
Discussion started by: JamesByars
9 Replies
6. Post Here to Contact Site Administrators and Moderators
Combine points of specific key (a1) based on user defined size (lets say 200 in this example).
so a1 191 and 191+200 and sum of all the values (4th column)
and vice versa...
Thanx a bunch!
a1 191 201 1
a1 201 211 2
a1 211 221 1
a1
.......
....
a2.........
........ (7 Replies)
Hi folks,
I have been asked to performed the following:
Add the following new moint points systemA:/avp and SystemB:/usr/sap/trans to be the new linux server ZZZ
How can I add those mount points and how those mount points can become another linuz server?:wall::wall::wall: (2 Replies)
Hi All,
I would like to set decimal point to 16 in the following bash script but it has syntax error at }:
awk '{printf"%.16e", (a<500,a++,$1/(a*1.1212121212121229e-02))}' input.dat >output.datHow may I set it in the correct way please? Thank you very much! (6 Replies)
Discussion started by: sxiong
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)