I have a phoenix table that is about 7 TB (unreplicated) in size, corresponding to about 500B rows. It was set up a couple years ago, and we have determined that the number of salt buckets it has is not optimal for the current query pattern we are seeing. I want to change the number of salt buckets as I expect it will improve performance.
I have written a MapReduce job that does this using a subclass of TableMapper. It scans the entire old table, and writes the re-salted data to a new table. The MapReduce job works on small tables, but I'm having trouble getting it to run on the larger table. I have two questions for anyone who has experience with this: (1) Are there any publicly available MapReduce jobs for re-salting a Phoenix table? (2) Generally, is there a better approach than MapReduce to re-salt a Phoenix table? Thanks, Marcell Ortutay
