data replication

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data replication

data replication

2004-07-12 - By Rajesh Mittal

Back

Reply: 1 2 3 4 5 6 7

Hi,

what kind of data replication are u talking about ?
is there two master databases with which your applications are going to talk.
or a master or slave type of db architecture..

what EJB's or other mechanism can do is to refresh their references/cache
when some record is updated in db by an application running in other cluster.

so if you can provide more info, we might be able to help you.

Rajesh

At 12:11 12/07/2004, koala.gnu@(protected) wrote:
>Hi all,
>
>some questions.
>
>1) Suppose I have a J2EE application with
>
>WEB Tier
>EJB Tier
>Database Tier
>
>I want to use clustering for solve scalability problem but I do not know
>who should be responsible for data replication: EJB or DB?
>
>I mean if on two server I configure EJB layers in clustering, does this
>allow data replication?
>If so, the entity bean should be defined remote or local. Currently I use
>only local interface since session bean access to them on same JVM.
>
>2) I use sequence bean pattern for id generation, but how to implement it
>in a clustered environment. Any link?
>
>3) again. I have some periodical tasks (call them services) and I want execute
>them only on one server. It could be a good choice distribute service
>execution
>on server. What pattern I should use?
>
>Thanks.
>
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