How many tasks in your chain list? What's the value of chain.currchain and chain.currstate for nodes when you saw that a lot of processes hang in 'nextdestiny' request?
What I can think of is the 'nextdestiny' will try to check the http
download path of 'runimage', could you check the path is accessible from
xCAT MN? And could you run 'nodeset <node> runimage=xxx' to see how much
time it takes to finish?
Thanks
Best Regards
----------------------------------------------------------------------
Wang Xiaopeng (王晓朋)
IBM China System Technology Laboratory
Tel: 86-10-82453455
Email: w...@cn.ibm.com
Address: 28,ZhongGuanCun Software Park,No.8 Dong Bei Wang West Road,
Haidian District Beijing P.R.China 100193
From: Russell Jones <russell-l...@jonesmail.me>
To: xcat-user@lists.sourceforge.net,
Date: 2014/01/18 06:46
Subject: [xcat-user] Bad performance with 70 nodes requesting
nextdestiny
Hi all,
My management node is experiencing a spike of over 60 load when I boot
70 nodes at once and request a runimage of them. Doing a "ps aux" shows
high iowait and what appears to be a perl process for nextdestiny
running for each node. We had this same issue under xCAT 2.3, and was
under the hopeful impression that performance was increased with xCAT
2.8 and nextdestiny behavior.
After about 10 minutes it seemed to have chewed through the requests and
the nodes continued their respective chained commands. Is there a way of
improving the way the management node handles nextdestiny requests from
10's of nodes at once?
Thanks!
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