[erlang-questions] Mnesia Replication and Large Numbers of Dirty Operations

Håkan Mattsson hm@REDACTED
Mon Oct 22 10:51:47 CEST 2012


Using dirty operations in a single node database may be ok, if you really
know what you are doing and do handle synchronization between you processes
properly.

But in a distributed setup with multiple nodes, you should use
transactions. Otherwise you can encounter inconsistencies during table
loading.

Mnesia transactions are not for free, but they give you ACID properties.

/Håkan

On Mon, Oct 22, 2012 at 9:44 AM, Joshua Muzaaya <joshmuza@REDACTED> wrote:

>
> Some applications require really fast response, to meet their expectations
> to users. I am building one such application and i am using mnesia. Now,
> when we by-pass the mnesia transaction manager , we approach good
> performance. However, this is the problem:
>
> We need to replicate this database as part of load balancing, after-all,
> mnesia does the replication for us. We are using ONLY dirty operations in
> this application. We have a few parts using async_dirty context. I am
> wondering, would mnesia replication be affected if we are not using the
> transaction context at this scale ?
>
> Too many frequent dirty operations are occuring on records all the time,
> so i wonder if a request made on side B replica, would find the changes
> the have just been made by side A replica via a dirty operation ?
>
>
>
>
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>
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