Reindexing data

When we release new mapping updates its imperative that data is reindexed. Its much easier on the system to reindex your existing data than to re-upload everything again (which is not efficient). We built a python helper utility to do this for you. It will take the current index, latest mappings and do the following;

• Build you a new index with the new mappings
• Remove the alias from the old index and point it to the new index
• Reindex your data from the previous index into the new index, allowing the new mappings to be used correctly.

Before you start:

• Make sure the machine is connected to the internet.
• Make sure that you have updated to the latest source build via yum check-update then yum update nighthawk. This will get you the latest mappings/source code to operate nighthawk at the latest version

How do you use it?

• SSH into the machine
• Execute /opt/nighthawk/bin/reindex.py
• Sit back and wait for the data to move over (could take a while depending on the size of your previous index)