SSO support on security

[#1]

Is Single Sign on (SSO) supported in Version 5.5? I need to create a SSO security on top of Sentry.

Though this is supported externally, I want to know whether this supports in Cloudera 5.5.

[#2]

What do you mean by SSO?  SAML?  Also, clients don't talk directly to Sentry.  Clients talk to Sentry-enabled services such as Hive, Impala, and Solr.  With that in mind, are you instead asking whether SAML is going to be supported as authentication mechanism for those Sentry-enabled services?  I am not aware of that being on a near-term roadmap.