Yes indeed, you are correct.
But, again there are few things you have to consider before creating SEA, you mentioned that these are Blade Servers, so how are you viewing them, through HMC or IVM? How many VIOS you have on each Blade?
If you have only one VIO on each blade, then SEA holds no good, coz it won't failover. If you have two VIOS, then only you are good to go for SEA.
Now, considering you have two VIOS, we have to figure out which virtual adapter (out of the 4) is your primary adapter and which is control channel adapter. You can check the profile (of virtual adapter) if a adapter has been check as access external network, and given a trunking priority then it is your primary adapter, for control channel adapter you WONT select access external network, and most shops give it a vlan no of 99 (purely environment based, so such standard), so as to distinguish control channel adapter from others.
You cannot use smitty (in rksh), you have to use mkdev command to create SEA.
$ mkvdev -sea "real adapt" -vadapter "primary virt adapt" -default "primary virt adapt" -defaultid "PVID" -attr ha_mode=auto ctrl_chan="control channel adapt"
Hope this helps.
Yes this is IBM Blades.
- I am using IVM.
- Just one VIO is installed.
So in that case having just one VIOs which is the option for high availability when one physical NIC fails?
Hello,
When I try to upgrade AIX from 5.1 to 5.3 I get this error message
20EE0008 : No adapters found Adapter, Riser, System Bd.
Anyone know anything about it ? (1 Reply)
Hi,
I want to know wheather partition size for installation of vio client can be specified on vio server
example
If I am installing vio server on blade with 2*300gb hard disk,after that I want to create 2 vio client (AIX Operating system) wheather I can specify hard disk size while... (1 Reply)
Hi
I have 4 NIC's connected to my RHEL 5.3 server. Two on one subnet creating bond0, and two on a second subnet which create bond1. Both bonds are set to use DHCP to obtain IP addresses. Here is the config file for ifcfg-bond0:
DHCP_HOSTNAME=rrnltshckvmx001
DEVICE=bond0
BOOTPROTO=dhcp... (2 Replies)
Hi all,
I set up the following configuration on my system:
- An LPar with a virtual adapter, first one with a vlan id=703 and id port=13.
- The first adapter have to connect to a VIOS in which i configured an SEA.
So, the VA is set up on interface ent2, SEA on ent29 (by linking a... (0 Replies)
Hi
In the vio server when I do # lsattr -El hdisk*, I get a PVID. The same PVID is also seen when I put the lspv command on the vio client partition. This way Im able to confirm the lun using the PVID.
Similarly how does the vio client partition gets the virtual ethernet scsi client adapter... (1 Reply)
I am trying to get my boss' ipad to print on our local printers, and rapidly coming to loathe the product.
After several false starts I'm attempting to use the free WePrint application, running on a Windows machine, to "forward" our printers from it to the ipad over the local network. I've hit... (2 Replies)
Hi guys,
I've been trying to tackle this issue for days and I'm stumped. Hopefully someone can give more light on what else I can do.
I have a p7 series box, with dual VIOS and 10 lpars and everything was working fine until I had to move the box to another location in the data centre. Ensured... (16 Replies)
Discussion started by: aixkidbee
16 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)