Hi,
I have a beginner's question w.r.t LB and Failover and recovery in an
EJB
server.
1. When we say Load Balancing (LB) helps in effcient system resource
management,
what are the components or resources that fall into this category in
an EJB compliant
App server?
* What exactly does the EJB vendor need to provide?
I guess the backend databases have their own LB algorithms.
* Does an App server's LB scheme also need to consider about any
third party components that can be plugged at a later time in the
EJB server to have an efficient LB scheme.
* At what level does the EJB Server handle the LB service ?
2. when we say the number of load balancing server that an EJB server
supports , what exactly are these servers?
3. I have questions along the same lines w.r.t Failover and Recovery
services provided by an App server.
* what kind of failure support at a minimum should be provided by
an EJB server vendor ?
* Does this service mainly take care of failures the server side ?
* I guess the App Server needs to maintain a duplicate or a replica
of the system so that client's request can be transferred to that
server/system in case of failure. So does it mean the same exact
copies of the App servers are running in differenr machines ?
* What it takes to provide a very reliable failover and recovery
service in an EJB server environment ?
* What if the failure scenario occurs on the server side as a
result
of client's interaction ? In that case won't the failure
scenario happen
even in the duplicate/backup system ?
How can one detect such possible potential failures that might
originate
from the client? Can such things happen ?
* Any idea of how the current EJB vendors provide this service ?
4. Is there any overlap between the LB, and Failover and Recovery
Services ?
Thanks,
Nishi.
--
(| (.)(.)|)
-------------------OOOo--()--oOOO.---------------
Nishi Nidamarty TDI Inc. ,
TEL : 408-330-3466 5000 Old IronSides Dr,
FAX : 408-330-3444 Santa Clara CA 95054.
mailto:[EMAIL PROTECTED] http://www.tdiinc.com
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