09-04-2018
Proliferate commands across nodes?
Hi folks.
I've been a developer for far too many years, but know very little of unix. I have setup a very inexpensive cluster of 6 raspberry pi nodes so I can play around with multi node programming. This is only for fun, but I want to learn properly, else what's the point?!
Setup can be a bit of a ball ache with proliferating code and commands.
Could you please suggest software that will allow me to send commands to node 1 and have that proliferated to the other 5? I have searched for this and found a few possibilities, most do a lot more than I need and the one that looks perfect (fabric) doesn't install in Raspbian, no idea why.
I'm sure I could write a bash with ssh and accomplish the basics, but I like the idea of asynchronous replies which I think is going to be a depth to far.
Any suggestions welcome, and if you have an opinion of one thing over another please let me know why.
Many thanks.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
first off, i am new to unix so please bear with me. i was reading somewhere that if your i-nodes get critical that it can slow your network down. what are i-nodes and when do they become a critical number? this is what mine states:
/ (/dev/root ): 777058 blocks 569290 i-nodes... (4 Replies)
Discussion started by: djatwork
4 Replies
2. UNIX for Dummies Questions & Answers
how do you list all the nodes in unix
:confused: (3 Replies)
Discussion started by: kamisi
3 Replies
3. UNIX for Advanced & Expert Users
Does anyone know something about this? I have no idea what it means and how to do it. but if anyone can give me and explanation and also point me to a website, i'd really appreciate it (5 Replies)
Discussion started by: TRUEST
5 Replies
4. UNIX for Advanced & Expert Users
After rcp -rp from remote host, using du -k to verify the file size but total file size have different size. Check on individual file, file size is correct.
How can I confirm on the file size after ftp?
Pls advise.
Thank you. (15 Replies)
Discussion started by: KhawHL
15 Replies
5. AIX
Usage:
We run test build jobs that login to our AIX machines and create many small files in /tmp. After these jobs complete, they delete their temporary files that they have created.
Issue:
After approximately a week /tmp appears to become full. Issuing the command “df –g... (4 Replies)
Discussion started by: bblondin
4 Replies
6. Emergency UNIX and Linux Support
hello Gurus,
My current set up is 3 to 1 Cluster (SUN Cluster 3.2) running oracle database. Task is to reboot the servers. My query is about the procedure to do the same.
My understanding is suspend the databases to avoid switchover. Then execute the command scshutdown to down the cluster... (4 Replies)
Discussion started by: EmbedUX
4 Replies
7. High Performance Computing
I am new to cluster commands. But I have tried utilizing: -pe, but I do not know my parallel computing environment. We are running SGE, is there a simpler command to request more nodes?
also: qsub -N auto -M name@email.com -m abe auto.sh
does not email me at all.
Help would be appreciated (0 Replies)
Discussion started by: theawknewbie
0 Replies
8. UNIX for Dummies Questions & Answers
Hi all. I have two nodes taken different places. They are connected together on a network. So, i have a service, it works on one of nodes and when the node is unavailable the service should will be launched on other node.
Solution: rhel cluster, keepalive, hearbeat...may be Carp
but what if... (2 Replies)
Discussion started by: Flomaster
2 Replies
9. Shell Programming and Scripting
Hi all,
I have a list of node pairs separated with a comma and also, associated with their respective values. For example:
b0015,b1224 1.1
b0015,b2576 1.4
b0015,b3162 2.5
b0528,b1086 1.7
b0528,b1269 5.4
b0528,b3602 2.1
b0948,b2581 3.2
b1224,b0015 1.1... (8 Replies)
Discussion started by: AshwaniSharma09
8 Replies
10. AIX
Hi,
A customer I'm supporting once upon a time broke their 2 cluster node database servers so they could use the 2nd standby node for something else. Now sometime later they want to bring the 2nd node back into the cluster for resilance. Problem is there are now 3 VG's that have been set-up... (1 Reply)
Discussion started by: elcounto
1 Replies
LEARN ABOUT DEBIAN
votequorum_leaving
VOTEQUORUM_LEAVING(3) Corosync Cluster Engine Programmer's Manual VOTEQUORUM_LEAVING(3)
NAME
votequorum_leaving - Tell other nodes that we are leaving the cluster
SYNOPSIS
#include <corosync/votequorum.h>
int votequorum_leaving(votequorum_handle_t handle);
DESCRIPTION
The votequorum_leaving function is used to tell the other nodes in the cluster that this node is leaving. They will (when the node actually
leaves) reduce quorum to keep the cluster running without this node.
This function should only be called if it is known that the node is being shut down for a known reason and could be out of the cluster for
an extended period of time.
Normal behaviour is for the cluster to reduce the total number of votes, but NOT expected_votes when a node leave the cluster, so the clus-
ter could become inquorate. This is correct behaviour and is ther eto prevent split-brain.
Do NOT call this function unless you know what you are doing.
RETURN VALUE
This call returns the CS_OK value if successful, otherwise an error is returned.
ERRORS
The errors are undocumented.
SEE ALSO
votequorum_overview(8), votequorum_initialize(3), votequorum_finalize(3), votequorum_dispatch(3), votequorum_fd_get(3),
corosync Man Page 2009-01-26 VOTEQUORUM_LEAVING(3)