RE: State Replication
Only a part of the heap is serialized in an Entity Bean(the public non-transient non-static non-final fields) for every reference to a bean in a TX, a ejbStore is executed. That is, you'll have a transactional state replication. -Original Message-From: Matthew Pullen [mailto:[EMAIL PROTECTED]]Sent: Martes, 28 de Agosto de 2001 10:04To: Orion-InterestSubject: RE: State Replication I appriciate your response. Is there a discussion anywhere about Orion replication and clustering? Is the integration only via a persistent store? What I have is a need to have an object replicated between mulitple instances in a cluster environment. It can be an EntityBean, but I would like to know more about how it is done. If only the heap can be serialized and sent between different participants of a cluster (not the execution stack), I am interested in finding out how to ensure object state gets replicated accurately. Thank you, Matthew Pullen UIN 352700 -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Juan Lorandi (Chile)Sent: Monday, August 27, 2001 3:35 PMTo: Orion-InterestSubject: RE: State Replication I don't think there is replication of SFSB's in orion. All replication I'm aware of is http-session's; you could achieve similar (but not identical) behavior by storing the SFSB's handle in the session object(provided you enabled http-session replication). However, this would achieve scalability, not reliability. My 2c, Juan Pablo -Original Message-From: Matthew Pullen [mailto:[EMAIL PROTECTED]]Sent: Lunes, 27 de Agosto de 2001 14:48To: Orion-InterestSubject: State Replication Hola, I sent a question to the mailing-list last week, but I did not see it sent back to me from the list, nor any responses, so I am assuming it didn't make it. This is the re-transmittal: I am trying to get replication of a Sate-full SessionBean across a replicated cluster. The loadbalancer is working well, and when one server is shut down, the balancer does direct the requests to another back-end server. However, session state is not being replicated between the two back-end orion instances. If it is not intended to work in this fashion, what is the intended functionality of "replication"? Are there any white papers or detailed documentation of the intended behavior? Thank you, Matthew Pullen
RE: State Replication
I appriciate your response. Is there a discussion anywhere about Orion replication and clustering? Is the integration only via a persistent store? What I have is a need to have an object replicated between mulitple instances in a cluster environment. It can be an EntityBean, but I would like to know more about how it is done. If only the heap can be serialized and sent between different participants of a cluster (not the execution stack), I am interested in finding out how to ensure object state gets replicated accurately. Thank you, Matthew Pullen UIN 352700 -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Juan Lorandi (Chile)Sent: Monday, August 27, 2001 3:35 PMTo: Orion-InterestSubject: RE: State Replication I don't think there is replication of SFSB's in orion. All replication I'm aware of is http-session's; you could achieve similar (but not identical) behavior by storing the SFSB's handle in the session object(provided you enabled http-session replication). However, this would achieve scalability, not reliability. My 2c, Juan Pablo -Original Message-From: Matthew Pullen [mailto:[EMAIL PROTECTED]]Sent: Lunes, 27 de Agosto de 2001 14:48To: Orion-InterestSubject: State Replication Hola, I sent a question to the mailing-list last week, but I did not see it sent back to me from the list, nor any responses, so I am assuming it didn't make it. This is the re-transmittal: I am trying to get replication of a Sate-full SessionBean across a replicated cluster. The loadbalancer is working well, and when one server is shut down, the balancer does direct the requests to another back-end server. However, session state is not being replicated between the two back-end orion instances. If it is not intended to work in this fashion, what is the intended functionality of "replication"? Are there any white papers or detailed documentation of the intended behavior? Thank you, Matthew Pullen
RE: State Replication
I don't think there is replication of SFSB's in orion. All replication I'm aware of is http-session's; you could achieve similar (but not identical) behavior by storing the SFSB's handle in the session object(provided you enabled http-session replication). However, this would achieve scalability, not reliability. My 2c, Juan Pablo -Original Message-From: Matthew Pullen [mailto:[EMAIL PROTECTED]]Sent: Lunes, 27 de Agosto de 2001 14:48To: Orion-InterestSubject: State Replication Hola, I sent a question to the mailing-list last week, but I did not see it sent back to me from the list, nor any responses, so I am assuming it didn't make it. This is the re-transmittal: I am trying to get replication of a Sate-full SessionBean across a replicated cluster. The loadbalancer is working well, and when one server is shut down, the balancer does direct the requests to another back-end server. However, session state is not being replicated between the two back-end orion instances. If it is not intended to work in this fashion, what is the intended functionality of "replication"? Are there any white papers or detailed documentation of the intended behavior? Thank you, Matthew Pullen
