[ZODB-Dev] RelStorage: Write on master, read from slave(s)?

[Chris Withers]

On 26/10/2010 11:27, Shane Hathaway wrote:
> On 10/26/2010 04:04 AM, Anton Stonor wrote:
>> In order to scale an application using RelStorage I was thinking about
>> seperating reads and writes accross databases. Writes would go to a
>> Mysql master and the app would read from one or more Mysql slaves.
>
> If you mean that you intend to set up some clients to write to a master
> database, while other clients only read from asynchronous replicas, then
> yes, you'll be in good shape.  You should be able to get amazing
> scalability that way.

Wouldn't this require zero replication lag?

Even if the read replicas had only a second or two delay (or spike 
delays caused by large writes?), would there not potentially be quite 
serious problems?

cheers,

Chris

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