Whether CDH support multi-homed or not?

[#1]

It looks like that CDH5.9 has support multi-homed from the URL "https://archive.cloudera.com/cdh5/cdh/5/hadoop/hadoop-project-dist/hadoop-hdfs/HdfsMultihoming.html".

But it looks like that CDH does not support multi-homed from the URL  "http://www.cloudera.com/documentation/enterprise/5-8-x/topics/cdh_ig_req_supported_versions.html#xd_...".

So i wonder which is true?

[#2]

any ideas?

[#3 · Accepted solution]

Hello David,

Sorry we didn't answer your question right away.

It seems that something undesirable happened to our documentation in 5.9.0, so the statement we had is no longer available.  The stance is the same as in 5.8.0, though:

Multihoming CDH or Cloudera Manager is not supported outside specifically certified Cloudera partner appliances. Cloudera finds that current Hadoop architectures combined with modern network infrastructures and security practices remove the need for multihoming. Multihoming, however, is beneficial internally in appliance form factors to take advantage of high-bandwidth InfiniBand interconnects.

Although some subareas of the product may work with unsupported custom multihoming configurations, there are known issues with multihoming. In addition, unknown issues may arise because multihoming is not covered by our test matrix outside the Cloudera-certified partner appliances.

We will work to correct the documentation so this information is published.

Thank you very much for bringing this to our attention.

Ben

[#4]

Another question: what is the specifically certified Cloudera partner appliances.

[#5]

There are some vendors who distribute CDH as part of an appliance.  I do not know of a closed list of these approved vendors, but an example of an appliance is Oracle's BDA:

https://www.oracle.com/engineered-systems/big-data-appliance/index.html

[#6]

A web search for "appliance cloudera" does come back with a few other hits like Teradata and Dell.  Whether they have been certified with multihomed configurations is not information that is generally available