10 More Discussions You Might Find Interesting
1. Red Hat
I have a couple of questions regarding multipath.
If I do vgdisplay vg01, I see it is using 1 PV: /dev/dm-13
If I type multipath -ll I see dm-9, dm-10, dm-11, dm-12, but do not see dm-13. Is my vg01 multipathed? How can I actually know for sure?
Secondly, let's say this time vg01 says... (1 Reply)
Discussion started by: keelba
1 Replies
2. Solaris
Hi All,
I have a problem setting the password when I have to create a user and password as detailed below.
username : gaacj01 password : oshopp01
username : gaacj02 password : oshopp02
username : gaacj03 password : oshopp03
username : gaacj04 password : oshopp04
username : gaacj05 ... (17 Replies)
Discussion started by: kittigolf
17 Replies
3. Shell Programming and Scripting
I am experimenting with some scripting as a way to learn more about it. I have a simple script that calls two other scripts. Each script echos some stuff to prove it ran and then sets a simple variable and exports it.
I cannot get one of the variables to display back in the main calling script... (2 Replies)
Discussion started by: scottrif
2 Replies
4. AIX
Hi,
I know the concept of multipathing, but would like to know how to configure multipathing in AIX.
or software/driver is by default present in AIX??????
How to find out wheather multipathing is configured in AIX?????
Regards,
Manu (4 Replies)
Discussion started by: manoj.solaris
4 Replies
5. Red Hat
I have a server running redhat 5.5 and it has one SAN device presented to it as LUN9. How can I clean up the remaining entries. I cannot afford to interupt the service. Please assist.
# multipath -l
mpath0 (36000097000019260298953666633436) dm-11 EMC,SYMMETRIX
\_ round-robin 0
\_ 2:0:0:9 ... (2 Replies)
Discussion started by: Tirmazi
2 Replies
6. Solaris
Hello,
I turned on the server multipathing:
# uname -a
SunOS caiman 5.10 Generic_141444-09 sun4v sparc SUNW,T5140
stmsboot -D fp -e
And after a reboot the server, multipathing is not enable:
# stmsboot -L
stmsboot: MPxIO is not enabled
stmsboot: MPxIO disabled
# ls /dev/dsk... (4 Replies)
Discussion started by: bieszczaders
4 Replies
7. Solaris
Hai
we using emc storage which is conneted to M5000 through san switch.
we asign 13 luns but in server it is showing 22 luns.
i enable the solaris multipathing (MPxIO)
#more /kernel/drv/fp.conf in that file
MPxio-disable=no
#mpathadm list lu
it shows ... (2 Replies)
Discussion started by: joshmani
2 Replies
8. Solaris
Hi,
I saw your post on the forums about how to setup IP multipathing. I wanted your help on the below situation .
I have 2 servers A and B . Now they should be connected to 2 network switches . S1 and S2.
Now is it possible to have IP Multipathing on each of the servers as follows ?
... (0 Replies)
Discussion started by: maadhuu
0 Replies
9. Solaris
I have solaris 10 sparc. I installed a Qlogic hba card.
This card is connected on a brocade switch and the brocade is connected on 2 different controllers on a Hitachi disk bay.
I formated 2 luns. On my solaris system, i have 4 disk.
How to configure solaris 10 to fix the dual disk view.
... (4 Replies)
Discussion started by: simquest
4 Replies
10. UNIX for Dummies Questions & Answers
I am one of the newbies. I am trying to install RedHat Enterprise AS on my notebook (i know it is not a good start to go with it, but it is the only dvd i have) on Windows XP by using the Virtual PC 2007. The installation processes were very fine. However, i have problem when it boot up to its... (2 Replies)
Discussion started by: sanlen
2 Replies
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)