UDF for lateral views
I would like to convert a column of ARRAY data-type such that each element of the array is returned as a row. Hive supports it via Lateral Views ( https://cwiki.apache.org/confluence/display/Hive/LanguageManual+LateralView )? Does UDF framework in Phoenix allow for building such functions?
Re: How to reduce write amplification when exists a few global index tables?
You can use local indexes to reduce write amplification. In that case, all index writes are local writes so the impact of multiple secondary indexes is not as severe. Of course, there's a read penalty you'd pay, so make sure you're ok with that. On Tue, Jan 16, 2018 at 12:08 AM, cloud.pos...@gmail.com < cloud.pos...@gmail.com> wrote: > For real time writing scenario, the throughput will be down when original > table have more index table. According to the implement of secondary > index, how to accelerate writing speed? >
How to reduce write amplification when exists a few global index tables?
For real time writing scenario, the throughput will be down when original table have more index table. According to the implement of secondary index, how to accelerate writing speed?
