Sync elasticsearch on connection with database - nodeJS

Question

Aim: sync elasticsearch with postgres database
Why: sometimes newtwork or cluster/server break so future updates should be recorded

Answer 1

For 1: As it is you have not warranty that syncProcess will have run by the time the client is exported. Instead you should do something like in this answer and export a promise instead.

For 2: With the solution I linked to in the above question, this would be taken care of.

For 3: An updates table would also catch record deletions, while simply selecting from the DB would not, since you don't know which records have disappeared.

For 4: The second comment after the article you linked to provides the answer (hint: timestamps are not strictly monotonic).