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Difference between revisions of "Load Balancing with Infiniband"

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[[Eric Barton wrote up something a year and a half ago (Bryon)]]. [[Sent email to Sheila 10/6]].
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For information about load balancing on an InfiniBand network, see Section 7.3: ''Load Balancing with InfiniBand'' in the [[Lustre Documentation|''Lustre Operations Manual'']].  
  
[[From OM Chapter 7]] 7.3 Load Balancing with InfiniBand
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For information about other LNET options, see Section 31.2.1: ''LNET Options'' in the [[Lustre Documentation|''Lustre Operations Manual'']].
 
 
There is one OSS with two InfiniBand HCAs. Lustre clients have only one InfiniBand
 
HCA using native Lustre drivers of o2ibind. Load balancing is done on both HCAs
 
on the OSS with the help of LNET.
 
 
 
 
 
Options under modprobe.conf are used to specify the networks available to a
 
node. You have the choice of two different options – the networks option, which
 
explicitly lists the networks available and the ip2nets option, which provides a listmatching
 
lookup. Only one option can be used at any one time. The order of LNET
 
lines in modprobe.conf is important when configuring multi-homed servers. If a
 
server node can be reached using more than one network, the first network specified
 
in modprobe.conf will be used.
 
 
 
7.3.1 Modprobe.conf
 
Lustre users have options available on following networks.
 
■ Dual HCA OSS server
 
options lnet ip2nets= "o2ib0(ib0),o2ib1(ib1) 192.168.10.1.[101-102]
 
■ Client with the odd IP address
 
options lnet ip2nets=o2ib0(ib0) 192.168.10.[103-253/2]
 
■ Client with the even IP address
 
options lnet ip2nets=o2ib1(ib0) 192.168.10.[102-254/2]
 
 
 
7.3.2 Start servers
 
 
 
To start the MGS and MDT server, run:
 
modprobe lnet
 
To start MGS and MDT, run:
 
$ mkfs.lustre --fsname lustre --mdt --mgs /dev/sda
 
$ mkdir -p /mnt/test/mdt
 
$ mount -t lustre /dev/sda /mnt/test/mdt
 
$ mount -t lustre mgs@o2ib0:/lustre /mnt/mdt
 
 
 
To start the OSS, run:
 
$ mkfs.lustre --fsname lustre --ost --mgsnode=mds@o2ib0 /dev/sda
 
$ mkdir -p /mnt/test/mdt
 
$ mount -t lustre /dev/sda /mnt/test/ost
 
$ mount -t lustre mgs@o2ib0:/lustre /mnt/ost
 
 
 
 
 
7.3.3 Start clients
 
 
 
For the IB client, run:
 
mount -t lustre
 
192.168.10.101@o2ib0,192.168.10.102@o2ib1:/mds/client /mnt/lustre
 
 
 
 
 
 
 
For more information about othe LNET options, see 31.2.1 LNET OPtions in the Lustre Operations Manual
 
 
 
For information about "How to build and configure Infiniband support for Lustre" the topic by thi =s nathe Lustre Knowledge Base in Appendix B in the Lustre Operations Manual.
 

Revision as of 15:49, 7 October 2009

For information about load balancing on an InfiniBand network, see Section 7.3: Load Balancing with InfiniBand in the Lustre Operations Manual.

For information about other LNET options, see Section 31.2.1: LNET Options in the Lustre Operations Manual.