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Process co-location: force mysqld to prefer local ndbd
Posted by: Anatilij Testerskiej
Date: November 25, 2016 08:41AM

Hi

My NdbCluster deployment is as follows:

Server 1 - ndbd + mysqld
Server 2 - ndbd + mysqld
Server 3 - ndb_mgm

NoOfReplicas = 2, so each of servers 1/2 hold full data-set

As I can see in tcpdump mysqld processes on both servers connect and fetch data both from local and remote ndbd processes.

I think that by avoiding network overhead I can get better performance by forcing mysqld process to query ndbd co-located on the same server, rather than remote one.

Is there any possibility to configure mysqld on server 1 to prefer fetching data from ndbd on server 1 and use data from server 2 only in case of failure of local ndbd?

Maybe some sort of cost-based query routing used in WAN environments can be used here?

Any hints?

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