[erlang-questions] Twoorl: an open source Twitter clone

Yariv Sadan <>
Thu May 29 08:39:34 CEST 2008


I've been using MySQL for Vimagi (http://vimagi.com) and haven't had
any problems. ErlyDB makes working with MySQL very easy -- just as
easy as Mnesia (if not easier in some cases) in terms of APIs. The
main reasons I went with MySQL are that I didn't want to deal with
fragmentation and dets repair times (yes, I know it wouldn't really
affect an app such as Twoorl, but I've already gotten into the mindset
of avoiding dets).

I actually wouldn't mind offering Mnesia as an alternate data store if
someone wants to implement it :)

Yariv

2008/5/28 Rapsey <>:
> Are the repair times really that much of a problem? It's not like servers or
> erlang runtime crash that often.
> I would think the advantages of using mnesia far outweight the
> disadvantages. Mnesia is much easier to scale and work with than mysql.
>
>
> Sergej
>
>
> On Thu, May 29, 2008 at 7:38 AM, Yariv Sadan <> wrote:
>>
>> Facebook runs on MySQL -- that's pretty scalable :)
>>
>> The main reason I didn't go with Mnesia for storing most data is the
>> dets issues discussed previously on this list (specifically, the long
>> repair times and the need for fragmentation over 4gb). I use Mnesia
>> for storing session data though.
>>
>> Yariv
>>
>> On Wed, May 28, 2008 at 10:26 PM, Nick Gerakines <>
>> wrote:
>> > MySQL? Seriously?
>> >
>> > I've heard from multiple sources database congestion is a major source
>> > of scaling problems for websites. Why take MySQL over a fragmented
>> > mnesia store or a set of hybrid services?
>> >
>> > # Nick Gerakines
>> >
>> > On Wed, May 28, 2008 at 10:12 PM, Yariv Sadan <>
>> > wrote:
>> >> Hi,
>> >>
>> >> I created an open source Twitter clone in Erlang called Twoorl. I
>> >> wrote it on top of ErlyWeb/Yaws.  You can see it at http://twoorl.com.
>> >> The code is at http://code.google.com/p/twoorl.
>> >>
>> >> I'll appreciate any feedback!
>> >>
>> >> Thanks,
>> >> Yariv
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>> >>
>> >
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