Advanced Technical Sales
|Abstract: tunables that are occasionally required on the AIX NIM master|
|1) To support a high number (16 or more) simultaneous installs, you should consider:|
nim -o change -a max_nimesis_threads=60 master
2) no options tcp_sendspace, tcp_recvspace, rfc1323 should already be set in the default AIX install. Watch for them on ifconfig -a, and verify that use_isno is on.
# ifconfig en0
inet 18.104.22.168 netmask 0xffffff00 broadcast 22.214.171.124
tcp_sendspace 262144 tcp_recvspace 262144 rfc1323 1
# no -a | grep isno
use_isno = 1
# no -F -a | grep isno (restricted setting in 6.1. Use -F)
use_isno = 1
3) Consider setting global_export=yes. If you perform frequent simultaneous installs, when one install completes, the default behavior of the master is to unexport NFS exports, remove the completed client from the export lists and re-export the filesystems. During this interval, other "in-flight" client installs may see the message "NFS server not responding, still trying" on the client console.
As an alternative, set global_export. With no clients enabled for install:
# nim -o change -a global_export=yes master
In this configuration, resources are exported read-only for every enabled client, and held exported until the last client completes.
Before, exports list every specific client allowed to mount
# showmount -e
export list for bmark29:
With global_export, exports are read-only for everyone
Realize, of course, anyone can mount these, even if they are not a NIM client
(read-only, AIX install content. Security issue? Probably not for most cases)
Installation and Migration
IBM Power Systems; IBM System p Family
global_export nfs trying responding max_nimesis_threads nim master
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