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Date: Fri, 16 Sep 2011 07:18:01 -0700 (PDT)
From: Uday Subbarayan <uday.subbarayan@yahoo.com>
Reply-To: Uday Subbarayan <uday.subbarayan@yahoo.com>
Subject: Re: Usecase: DB Sharding
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Thanks Ady. It's helpful and I am not the only one thinking about it.=0A=0A=
Best,=0A-Uday.=0A=C2=A0=0A-------------------------=0AI do not blog but e-w=
rite:=0Ahttp://uds-web.blogspot.com=0A=0A=0A_______________________________=
_=0AFrom: Ady Lau <imxylz@gmail.com>=0ATo: "user@zookeeper.apache.org" <use=
r@zookeeper.apache.org>; Uday Subbarayan <uday.subbarayan@yahoo.com>=0ASent=
: Thursday, September 15, 2011 6:39 PM=0ASubject: Re: Usecase: DB Sharding=
=0A=0AWe define all database information in xml files and put them into zoo=
keeper=0Awith protocol buffers format.=0A=0AThe clients get some configurat=
ions which using by business and build=0Adatasource=C2=A0 dynamically.=0AAl=
so the clients watch the node in zookeeper and rebuild datasource while=0At=
he necessary node has changed.=0A=0A=0A=E5=9C=A8 2011=E5=B9=B49=E6=9C=8816=
=E6=97=A5=E6=98=9F=E6=9C=9F=E4=BA=94=EF=BC=8CUday Subbarayan =E5=86=99=E9=
=81=93=EF=BC=9A=0A=0A> Hey Guys,=0A>=C2=A0 =C2=A0 =C2=A0  Any one used ZK f=
or Database sharding? I am thinking something like=0A> this-=0A> -DB shard =
info is kept in ZK=0A> -Application makes the call to ZK first to get the s=
hard info (which=0A> database server has what data)=0A> -Then application c=
onnects to right DB for accessing data.=0A> -Any shard change is communicat=
ed to the app with ZK watch.=0A>=0A> I see that Rackspace use case=C2=A0 an=
d just checking the community for anyone=0A> done it...=0A>=0A> Thanks,=0A>=
 -Uday.
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