where do this info /default-rack/NWAPPLIANCE20257 saved

[huanzhou1]

when i do a maprcli node list, below info came out, wondering where /default-rack/NWAPPLIANCE20257 saved?

I already changed appliance name.

0                     7752       0       tasktracker,hbmaster,hbregionserver,cldb,fileserver,nfs,hoststats,jobtracker  7872    0                 0                  /default-rack/NWAPPLIANCE20257  958     2             60       0                             rsasaw1   0                   0       6      0                 0             0       0                         0                      0              4             0                     0                                    0                          957     0              0                                   0                              0          7585183357613044849  3395   2     34           328     1              0                               0                                     0             0                             2           0      Sat Jan 17 07:37:30 SGT 1970  16              0            124    192.168.1.71,192.168.253.71  9        0     0                                    0                    0                       tasktracker,hbmaster,fileserver,nfs,hoststats,jobtracker  14054          0                                   Healthy

[Anonymous]

You need to edit /etc/sysconfig/network file and change the HOSTNAME parameter in that file to whatever the hostname of this SAW node should be.

[huanzhou1]

i mean the the /default-rack, what does that means?

[Anonymous]

Remember that Hadoop is rack-aware for replication etc.. the deafult-rack is just the single rack topolgy aka default out of the box setup.

[huanzhou1]

Any parameter we can configure not to use default?

[Anonymous]

Are you trying to do replication or disaster recovery? There should be no reason to move the SAW nodes to another topology outside of default-rack. We have a large cluster and all nodes are in the default rack.

[huanzhou1]

No, just want to know more inside details about SAW.

[Anonymous · Accepted solution]

Look at MapR's site and you can learn more about it. SAW is just MapR's implementation of Hadoop with a few RSA services running on top like CEP etc...

[huanzhou1]

sure. thanks.