No we do not allow multiple active Management nodes.
Using servicenodes, we have the xcat daemon (xcatd) running on each
service node. Your xcat commands will be run from the servicenodes. You
run the commands from the management node and based on your configuration,
they get sent by xcatd to the correct servicenode. The Management Node
must be active, it has the xCAT database.
Whether you want a backup Management Node is based on your needs of your
cluster. Can you tolerate some time where you cannot run xCAT? It all
depends on how you are using xCAT. I am not sure how many xCAT users
invest in a backup management node. I don't expect a MN to fail very
often and if it does can you tolerate the recovery time. The important
thing is to have the data backed up so when it fails you can get it up and
running quickly.
Lissa K. Valletta
8-3/B10
Poughkeepsie, NY 12601
(tie 293) 433-3102
From: Jaskaran Singh <[email protected]>
To: xCAT Users Mailing list <[email protected]>,
Date: 06/05/2014 08:45 AM
Subject: Re: [xcat-user] Multiple management node
I did read through that and i see you can do HA node option.
The document talks about for high availablity, that would mean that the
second node would sit idle.
I am wondering if xcat allows multiple management nodes to be used who can
submit commands to the nodes at the same time.
I believe multiple management nodes will create race conditions if issuing
commands on the nodes at the same time.
In the service node concept, do you put the scheduler on each service node
for it to be able to submit jobs to the resources.
Does xcat recommend having more than 2 management nodes because i dont see
it in any architecture diagram?
Thanks
On Wed, Jun 4, 2014 at 9:30 PM, Guang Cheng Li <[email protected]> wrote:
HI,
The doc
http://sourceforge.net/apps/mediawiki/xcat/index.php?title=Highly_Available_Management_Node
describes the different HA MN options for xCAT, you could take a look
and if you have further question, please let me know.
-------------------------------------------------------------------------
Li,Guang Cheng (李光成)
IBM China System Technology Laboratory
Email: [email protected]
Address: Building 28, ZhongGuanCun Software Park,
No.8, Dong Bei Wang West Road, Haidian District Beijing 100193,
PRC
北京市海淀区东北旺西路8号中关村软件园28号楼
邮编: 100193
Inactive hide details for Jaskaran Singh ---2014/06/05 04:22:10---I know
xcat has the concept for HA of Management and service Jaskaran Singh
---2014/06/05 04:22:10---I know xcat has the concept for HA of Management
and service nodes. Has anyone deployed multiple man
From: Jaskaran Singh <[email protected]>
To: xCAT Users Mailing list <[email protected]>,
Date: 2014/06/05 04:22
Subject: [xcat-user] Multiple management node
I know xcat has the concept for HA of Management and service nodes.
Has anyone deployed multiple management nodes.
I dont see any advantage in having multiple management nodes but i need
to research if it is possible, is it recommended, is anyone deploying it.
Thanks
Jaskaran
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