Efficient mechanism to simulate the row level updates in Hive

Hello, We have thousands of tables in a Hive database. Many tables have billions of records and multi TB of data data in them. We are looking for efficient mechanism to achieve row level updates on these tables. Please share your experiences, ideas. Thanks and Regards, Sheetal

Hive for a large datawarehouse

Hi, We are exploring hive for a very large data warehouse (Up to 2 PB data size) and would like to get some information 1. What are your experiences on using hive for large data warehouses 2. What is biggest hive implementation that you have seen 3. How is the query performance with peta bytes