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Day 5 – Big data Project

1.Developing a java app that shows a list of Hdfs folders by making a call to impala host when lot of other users are as well using the same host simultaneously will bring issues to the webapp if impala is hanging . Either make sure that the impala node that the java host is using […]

Day 4 – Big Data Project

1.when you try to deploy certificates and if the number of alternate/alias names limit is reached , you could try to have multiple certificates for multiple services . 2.users impala queries are taking all available memory on a node and causing memory issues for other queries . The solution is to configure load balancing for […]

Day 3 – Big Data Project

1. If your project is using informatica BDM or EIC and you have multiple linux hosts for example hosting the informatica services, you might want to deploy just one certificate on all hosts . The certificate should have all the host names and the load balancer names. This will ensure that even though the services […]

Day 2 – Big Data Project

Involved in activities related to enabling smart card login into a windows server . This requires a windows GPO. This requires our service to have a specific tree in active directory. To create a new tree in active directory involves multiple process management activities which delay the actual technical work that needs to be done. […]

Day 1 – Big Data Project

1.users had issues running impala queries. Out of memory errors . Multiple users running impala queries. Each node had 97GB physical RAM. One user occupied 75GB and so the other user suffered.Impala logs identified missing statistics. Advised user to gather statistics as a more efficient plan can be found. 2. An issue with source system […]

Oracle resource manager

oracle resource manager

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what is ADR or automatic diagnostic repository in oracle 11g

what is ADR or automatic diagnostic repository in oracle 11g

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understand the structure of a oracle audit file

understand the structure of a oracle audit file

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oracle delete millions of rows without any rollback

delete millions of rows in oracle without any rollback

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migration of a oracle database across different operating systems

migration of a oracle database across different operating systems

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