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On 09/01/07 08:12, chris smith wrote:
>> Ever read anything on how myspace is laid out? The big ones need
>> replication to handle the traffic.
>
> Actually no.
>
> http://highscalability.com/livejournal-architecture
>
> "Using MySQL replication only takes you so far." (Yeh it's mysql but
> the point is valid regardless).
> "You can't keep adding read slaves and scale."
>
> A lot use sharding now to keep scaling (limiting to "X" users/accounts
> per database system and just keep adding more database servers for the
> next "X" accounts).
Hmmm. Horizontally partitioning your "database" into multiple
physical databases is 10+ years old. At least. This is how DEC
implemented the billing database for DirecTV, and how we implemented
*large* toll systems in the US Northeast.
In addition to the account databases, you need a "reference"
database for tables that can't be partitioned by account, be able to
run queries across databases, and middleware that knows how to
direct transactions to the correct database.
- --
Ron Johnson, Jr.
Jefferson LA USA
Give a man a fish, and he eats for a day.
Hit him with a fish, and he goes away for good!
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