Big Data Cloud Service Frequently Asked Questions (FAQ)
(Doc ID 2130171.1)
Last updated on MAY 17, 2021
Applies to:
Big Data Cloud Service - Version 1.0 and laterLinux x86-64
Purpose
Provide external FAQ for Big Data Cloud Service (BDCS) issues.
Questions and Answers
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In this Document
| Purpose |
| Questions and Answers |
| How does dcli work on DomU vs Dom0? |
| Are hardware related commands are run from Dom0? |
| What about disk configuration? Where is that done? |
| Does Oracle BDCS use rotational HDD or SSD? |
| If HDD is used, why does the command "lsblk -d -o name,rota" show ROTA as "0" instead of "1"? |
| What about OS versions? |
| Can there be client/edge nodes to the cluster? |
| What image is on the VMs? |
| What does the output from the 'mount' command look like in DomU? |
| What does bdacheckhw look like in DomU? |
| What does bdachecksw look like in DomU? |
| Can you run bdacli getinfo commands on DomU? |
| What does "./mammoth -c" output look like? |
| Can port 80 be opened for installed apps on V1 servers? |
| If it is required that a new port be opened, what is the procedure to do that? |
| Do firewall ports need to be open between a BDCS environment and an Active Directory server? |
| If CM can not be accessed in BDCS what can be done? |
| What if Cloudera Manager displays no status for any service? |
| If it is not possible to connect using SSH or Putty what can be done? |
| What else is known about the BDCS network allowlist? |
| Does ODBC connectivity to HiveServer2 require opening port 10000? |
| In the BDCS environment is the expectation that the Hue login be the same as the login to CM? |
| How can you access Spark from the Cloudera Manager console in a BDCS environment. |
| How is upgrade from BDA V4.2.1 to BDA 4.4.0 done? |
| Should the Hive Gateway be in an "Active" state in CM? |
| How can a trusted certificate be obtained for the Oracle Cloud Cluster? |
| What is the best way to move data from HDFS on a BDCS cluster to cloud storage? |
| What is the size limit for distcp copies? |
| How it is possible to transfer 5GB? It seems like there is a failure at around 4.8GB transfers? |
| What is the best method to ensure that the data is copied with out any corruption? |
| When moving data from HDFS on a BDCS cluter to cloud storage is there an expectation that there would be a bottleneck at the destination site? |
| Where can I find information on Troubleshooting swift? |
| When copying to Cloud Storage can we can take advantage of the Upload CLI tool? |
| Where would I get the Upload CLI Tool to evaluate it? |
| Since the Upload CLI Tool is not HDFS aware is it possible to workaround this by using Fuse/HDFS NFS Gateway? |
| Can an HDFS NFS Gateway run on a node if a Linux NFS server is running on a node? |
| In a BDCS Mammoth 4.5 environment can bdacli enable/disable be used as in the on-premise environment? |
| Does this mean that in BDCS Mammoth 4.5 environment that 'bdacli enable Kerberos' can not be used to enable Kerberos/Sentry after provisioning without Kerberos support? |
| Does this mean that in a BDCS Mammoth 4.5 environment that bdacli can not be used to enable hdfs transparent encryption as well? |
| Is the policy to install software on BDCS as same as BDA ? |
| Where can I find information about using the hadoop client parallelize copying? |
| Is Solr included in BDCS? |
| Is it possible to install third party software on BDCS? |
| Can Apache Zeppelin Helium be installed on a BDCS cluster? |
| Is it possible to use the Rest API with Zeppelin Notebooks? |
| What information is available on BDCS nodes - Permanent vs Compute? |
| What information is available on adding permanent or bursting nodes to a BDCS cluster? |
| Is there any problem rebooting a node in the BDCS environment? |
| On BDCS where are the instructions for provisioning VPN? |
| Is it possible to deploy a custom web service application on BDCS which needs to be accessed from outside the BDCS environment without enabling VPN? |
| If a cluster provision fails on setup but then completes is there a concern that the cluster is not created correctly? |
| Questions about Kerberos Principals |
| Should the hdfs/clustername and oracle/clustername principals be created by default in a BDCS cluster? |
| Is it safe to create either oracle/clustername or hdfs/clustername if they are required? |
| What about the principal oracle@<REALM_NAME> which is shown with listprincs on a BDCS 4.7.3 cluster? |
| If an hdfs principal is created manually does it lack any functionality that the Cloudera created hdfs principals have? |
| If the CM password for this principal, hdfs/<CLUSTERNAME>@BDACLOUDSERVICE.ORACLE.COM, is not working can a new one be issued? |
| Is it possible to kinit Cloudera Manager created principals with the CM admin password in a BDCS environment? |
| In this environment is there a default password for the oracle user? |
| Is installing Docker on BDCS nodes supported? |
| Is it possible then to install OL7 on BDCS clusters? |
| Questions about ODI on BDCS |
| Is the ODIAgent already deployed on the BDCS cluster? If not, on which node should weblogic+ODIAgent be installed? |
| Does the Agent have to be deployed on all nodes if Hive and HDFS are going to be used? Or is deploying it on 1 node sufficient? |
| Does BDCS include an Oracle DB in which the metadata repository can be created? |
| Can ODI that comes with BDCS be upgraded to a newer version e.g. (12.2.1.2.6)? |
| Is there any note or technical brief or how to, to do tuning activities on MySQL database that comes with BDCS? |
| References |