Hi guys,
I am a new member here. This is my first post.
I try to purchase some new Blade 2500 for the
company. However, the vendor suggests me to get Blade 2000 instead. The vendor said he has many problems
with new Silver Blade 2500's. Has anyone here had
simlar experience with blade 2500?... (4 Replies)
Hi, Sir,
I have a customer who use a SB2000 as server and just upgraded three client machine with SB2500.
The system is used for planning and all boxes likely share the same source on server, so pretty slow when all machines are in operation.
The customer wish to do a server-to-client and... (0 Replies)
Hi everyone this is my first post
I have used linux a couple of times and was impressed, so i bought an old sunblade 1000, just to learn something new.
I cannot get the thing to work! I have tried to install solaris 10 and several types of linux. I am beginning to wonder if i was sold a... (3 Replies)
Progress! 25% there on our way 10,000 FB fans on the new timeline:
https://www.unix.com/members/neo-albums-forum-pics-picture503-facebook-timeline-now-over-2-500-fans.png (0 Replies)
Hi,
I recently got StoragaTek 2500 and I would like to connect it to my solaris machine, since I don't have much experience with storages, could someone point me how to do so, how can i present disks from storage on my solaris os? (everything is already connected)
thanks in advance (1 Reply)
Hello All,
I am new to the forum so forgive me for any mistakes. I have a question. I have been doing alot of reading about how to get a supportable operating system on my sunblade 2500. I also want to use it for Xorg. I have been having trouble getting the sun XVR drivers working... (2 Replies)
hello everyone,
I am new to linux and got this deliverable to write a script that should check for error in multiple log file (count is approx 2500 log files on single server) and once error is found, it should mail that error
My logic says:
we can put all log files path/location in one... (2 Replies)
Good Morning,
I took a mirror drive from one Solaris 9 machine and used it to set up another. After syncing another mirror on the second machine I restarted but I don't get a login screen.
I see a message:The X-server cannot be started on display :0
Also during startup I see:... (8 Replies)
Discussion started by: Stellaman1977
8 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)