Comments on: Look ma! Mysql Federation sucks!

By: argiope

argiope — Fri, 25 Jan 2008 03:17:23 +0000

Sheeri.
well you have a point. If Oracle Federation sucks as well, then it’s not mysql faults to not write a better one.
no need to get sentimental about MySQL. It’s obvious that federation is no good for my situation. I’ve just put some words together to express my frustration on mysql federation, because, now I need to code something to solve my problem.
If Our 11g was any better I wouldn’t need to use mysql federation.
I tried Giuseppe Maxia’s idea on universal mysql server (ref: http://dev.mysql.com/tech-resources/articles/dbixmyserver.html) and here I’m frustrated to mysql.
Idea is nice, mysql was the weakest link in the chain.

By: Sheeri Cabral

Sheeri Cabral — Wed, 23 Jan 2008 13:08:17 +0000

Why do you say MySQL Federation? Did you compare it with Oracle Federation? You do realize that the query time is dependent on network latency and, depending on your setup, can be increased exponentially if DNS reverse lookups are slow? Oracle FEDERATED tables suffer from the same long running time.

By: argiope

argiope — Mon, 21 Jan 2008 00:12:51 +0000

Mark,

I agree.
Federation is not completely useless. Good usage suggestion. Unfortunately, I feel like federation is not ready yet for prod environments as a roboust engine.

By: Mark Robson

Mark Robson — Sun, 20 Jan 2008 09:54:23 +0000

No, federation is NOT useless.

You just need to be very careful using Federated in SELECTs. Actually for doing things like bulk inserts, it’s pretty nifty (particularly with recent changes to use better bulk inserts).

Suppose you have a farm of servers collecting audit data and want to summarise it regularly to a master reporting server, you can use INSERT … SELECT on the Fed. table and it will do an efficient bulk insert for you. This is likely to be more efficient than taking the data via a client application and issuing the queries yourself.

Mark