I host a few websites for friends and lately my server has been bogging down at times. I think that it is because of a dns conflict. Someone said that by doing a nslookup I should be able to see it and then do a pkill -9 in.named and then do in.named to get it going again.
Any feedback on this... (1 Reply)
Hi
I am writing a piece of code using gcc-3.4.4 which uses usb library (-lusb) to interact with a small robot, getting inputs from sensors and sending commands back to motors.
Now my problem is that when I use ncurses library in my code to get use of keyboard functionalities, the usb inputs do... (1 Reply)
Hi,
I know this has been discussed a number of time but i could not get the exact answer. So need help again.
Issue:
The two command for same file system shows different size.
du -sk shows toatl size is 12780685 KB while df -k 45289229 used allocated Kb
/oxt/mantran/bin $ du -sk... (8 Replies)
I am trying to determine the root cause of a java process that dies trying to startup during it's cron job.
I did go ahead and change the time that it starts up in the cron file and now it starts successfully.
However is there a way to determine what PID a process was attempting to get when... (5 Replies)
Hi Gurus
I am in a strange situation.
I have a SUN sparc server . The server was having an IP say X..... (this IP X is now being used by another server)..... I have just installed fresh solaris 9 OS on the same server and given new IP say Y.
I also configured probe based IPMP with ce0 and... (2 Replies)
Hi, I am currently working on 2 SPARC-ENTREPRISE T5220 (cluster servers), named SERVER 3A and SERVER 3B.
Both servers have their own Ip ADRESS and share 1 Virtual IP adress to share applications.......
Both servers are available , but can't communicate together right now. For example, from... (8 Replies)
dear all,
kindly i want to check my server memory utilization i used alot of commands but i want to make sure that it is acurate let me explain
i have a server which has 32GB RAM
Total Memory = 33423360 kb
Free Memory = 4172568 kb
Utilized Memory = 29250792 kb
Memory Utilization... (2 Replies)
Hi I am trying to configure NIS client on my Ubuntu 12.04.
But I could not put portmap without uninstalling rpcbind.
Do I need to have rpcbind there on the server, or how can I have both portmap and rpcbind at same time there on the server, because it's having conflict. (1 Reply)
Hi forum,
I've run into a problem here and I can't seem to figure it out.
OS=Solaris 10 u11 SPARC.
This application (running on a local zone) was having a conflict with a port and I can't seem to find that port listed. (eg 41468)
I've tried
netstat -an|grep 41468
I am pretty sure this... (2 Replies)
I have a Sun T4-1 running Solaris 11.4 with a static IP 192.168.0.183. On this machine is a Solaris 10 LDOM with a static IP of 192.168.0.78. The other day I had to stop the LDOM to do a memory reconfigure. When I rebooted it I got an error that the IP 192.168.0.78 was already in use and so... (4 Replies)
Discussion started by: Michele31416
4 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)