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Re: [propel-dev] r/w splitting in master-slave db replication environment

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Author Cameron Brunner <cameron dot brunner at gmail dot com>
Full name Cameron Brunner <cameron dot brunner at gmail dot com>
Date 2007-11-02 17:23:10 PDT
Message There is no reason this cant be done purely by slotting in a new
PropelPDO layer with intelligence on what to send the query to IMO. I
have thought this out before and it shouldn't be too painful depending
upon just how smart you want it.

On 11/3/07, Christian Abegg <abegg dot ch at gmail dot com> wrote:
> hi
>
> i'd like to use my propel app in an environment where the db-master is
> replicated to one or more slave databases. the master gets the writing
> statements, the slave gets the reading statements.
>
> in my opinion, the propel layer would be appropriate implement that
> function.
>
> as far as i see, there is no such feature in propel.
>
> after a short look into the generated base-classes, it seems like a
> quite an easy task to implement a read-write splitting. assuming that
> all reading queries call the "doSelectStmt" function, i'd introduce the
> DATABASE_NAME_READ-constant which points to the configuration of the
> slave-db.
>
> for load balancing between multiple slave-db's i'd use the mysql-proxy.
> but a simple round robin mechanism could be implemented in propel as well.
>
> i'm not sure wheter this approach could solve my problem. a big question
> is: are the connection objects cached by propel? or is the $con-variable
> always null if the user doesn't give a connection on the application layer?
>
> if that enhancement is considered usefull and could be implemented
> within reasonable time, i'd be glad to help.
>
> christian abegg
>
>
> ps: my attempts to add an enhancement ticket failed beacaus they were
> rejected as spam by trac.
>
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>


--
Cameron Brunner

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r/w splitting in master-slave db replication environment Christian Abegg <abegg dot ch at gmail dot com> Christian Abegg <abegg dot ch at gmail dot com> 2007-11-02 13:09:28 PDT
     Re: [propel-dev] r/w splitting in master-slave db replication environment Cameron Brunner <cameron dot brunner at gmail dot com> Cameron Brunner <cameron dot brunner at gmail dot com> 2007-11-02 17:23:10 PDT
         Re: [propel-dev] r/w splitting in master-slave db replication environment Christian Abegg <abegg dot ch at gmail dot com> Christian Abegg <abegg dot ch at gmail dot com> 2007-11-18 08:59:06 PST
             Re: [propel-dev] r/w splitting in master-slave db replication environment Christian Abegg <abegg dot ch at gmail dot com> Christian Abegg <abegg dot ch at gmail dot com> 2007-12-02 06:26:12 PST
                 Re: [propel-dev] r/w splitting in master-slave db replication environment hlellelid Hans Lellelid 2007-12-02 17:22:35 PST
                     Re: [propel-dev] r/w splitting in master-slave db replication environment Christian Abegg <abegg dot ch at gmail dot com> Christian Abegg <abegg dot ch at gmail dot com> 2007-12-02 23:29:59 PST
                         Re: [propel-dev] r/w splitting in master-slave db replication environment hlellelid Hans Lellelid 2007-12-03 03:54:52 PST
                         Re: Re: [propel-dev] r/w splitting in master-slave db replication environment Moritz Mertinkat <moritz at mertinkat dot net> Moritz Mertinkat <moritz at mertinkat dot net> 2007-12-04 06:48:31 PST
                             Re: Re: [propel-dev] r/w splitting in master-slave db replication environment Pedram Nimreezi <zenstyle at gmail dot com> Pedram Nimreezi <zenstyle at gmail dot com> 2007-12-04 07:40:31 PST
                             Re: [propel-dev] r/w splitting in master-slave db replication environment Shane Langley <shane dot langley at gmail dot com> Shane Langley <shane dot langley at gmail dot com> 2007-12-04 11:40:14 PST
                                 Re: [propel-dev] r/w splitting in master-slave db replication environment Moritz Mertinkat <moritz at mertinkat dot net> Moritz Mertinkat <moritz at mertinkat dot net> 2007-12-04 12:11:38 PST
                                     Re: [propel-dev] r/w splitting in master-slave db replication environment Shane Langley <shane dot langley at gmail dot com> Shane Langley <shane dot langley at gmail dot com> 2007-12-04 12:48:15 PST
                                         Re: [propel-dev] r/w splitting in master-slave db replication environment hlellelid Hans Lellelid 2007-12-04 13:22:07 PST
                                             Re: [propel-dev] r/w splitting in master-slave db replication environment Christian Abegg <abegg dot ch at gmail dot com> Christian Abegg <abegg dot ch at gmail dot com> 2007-12-10 13:50:26 PST
                                         Re: [propel-dev] r/w splitting in master-slave db replication environment Moritz Mertinkat <moritz at mertinkat dot net> Moritz Mertinkat <moritz at mertinkat dot net> 2007-12-04 13:24:16 PST
                                             Re: [propel-dev] r/w splitting in master-slave db replication environment hlellelid Hans Lellelid 2008-01-04 05:57:21 PST
                                                 Re: [propel-dev] r/w splitting in master-slave db replication environment Christian Abegg <abegg dot ch at gmail dot com> Christian Abegg <abegg dot ch at gmail dot com> 2008-01-06 00:45:46 PST
                                                     Re: [propel-dev] r/w splitting in master-slave db replication environment hlellelid Hans Lellelid 2008-01-06 06:31:58 PST
                                                 Re: [propel-dev] r/w splitting in master-slave db replication environment =?ISO-8859-1?Q?David_Z=FClke?= <dz at bitxtender dot com> =?ISO-8859-1?Q?David_Z=FClke?= <dz at bitxtender dot com> 2008-01-07 06:46:19 PST
                                                     Re: [propel-dev] r/w splitting in master-slave db replication environment hlellelid Hans Lellelid 2008-01-07 06:47:37 PST
                                                         Re: [propel-dev] r/w splitting in master-slave db replication environment =?ISO-8859-1?Q?David_Z=FClke?= <dz at bitxtender dot com> =?ISO-8859-1?Q?David_Z=FClke?= <dz at bitxtender dot com> 2008-01-07 07:56:22 PST
                                                             Re: [propel-dev] r/w splitting in master-slave db replication environment hlellelid Hans Lellelid 2008-01-07 07:56:27 PST
                                                                 Re: [propel-dev] r/w splitting in master-slave db replication environment =?ISO-8859-1?Q?David_Z=FClke?= <dz at bitxtender dot com> =?ISO-8859-1?Q?David_Z=FClke?= <dz at bitxtender dot com> 2008-01-07 08:02:14 PST
                                                                     Re: [propel-dev] r/w splitting in master-slave db replication environment hlellelid Hans Lellelid 2008-01-07 08:06:02 PST
                                                                         Re: [propel-dev] r/w splitting in master-slave db replication environment =?ISO-8859-1?Q?David_Z=FClke?= <dz at bitxtender dot com> =?ISO-8859-1?Q?David_Z=FClke?= <dz at bitxtender dot com> 2008-01-07 08:32:56 PST
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