IP failover, load balancing and notification...
Pretend I have the following setup/hardware:
Two intel xserves running 10.4. One is for http traffic the other https. The http server contains a static html website while the other server has a large dynamic database driven website and all of its pages require ssl encryption. I'll refer to the first as server 1 and server 2 for the other.
Now I want to implement a solution for providing high availability and performance.
If I wanted IP failover I would need two additional servers, one for the first webserver and the second for the other. Likewise if I wanted to address load balancing I would also need two additional servers, one for server 1 the other for server 2. Now my questions:
1) It seems implementing load balancing as described on page 32 of Apples High Availability pdf that this would also provide high availability like IP failover does. If two additional servers were purchased to provide high availability via a load balancing strategy would there be any need to implement IP failover? Does load balancing provide the same benefits as IP failover when talking about high availability? When if ever would one need to implement both strategies?
2) Can you somehow provide IP failover with only one server as the backup using the setup above (a third server to provide IP failover for both servers 1 and 2)? Assume the third server has all the data of both server 1 and server 2.
3) Is it possible to have Server Admin or Raid admin notify you of a problem via calling your cell phone or sending you a text message as opposed to only email, maybe via a third party solution? I think (not 100% sure) APC offers this when the power left in their batteries reaches a certain level.
Thanks.
G5 xserve Mac OS X (10.4.8)
Two intel xserves running 10.4. One is for http traffic the other https. The http server contains a static html website while the other server has a large dynamic database driven website and all of its pages require ssl encryption. I'll refer to the first as server 1 and server 2 for the other.
Now I want to implement a solution for providing high availability and performance.
If I wanted IP failover I would need two additional servers, one for the first webserver and the second for the other. Likewise if I wanted to address load balancing I would also need two additional servers, one for server 1 the other for server 2. Now my questions:
1) It seems implementing load balancing as described on page 32 of Apples High Availability pdf that this would also provide high availability like IP failover does. If two additional servers were purchased to provide high availability via a load balancing strategy would there be any need to implement IP failover? Does load balancing provide the same benefits as IP failover when talking about high availability? When if ever would one need to implement both strategies?
2) Can you somehow provide IP failover with only one server as the backup using the setup above (a third server to provide IP failover for both servers 1 and 2)? Assume the third server has all the data of both server 1 and server 2.
3) Is it possible to have Server Admin or Raid admin notify you of a problem via calling your cell phone or sending you a text message as opposed to only email, maybe via a third party solution? I think (not 100% sure) APC offers this when the power left in their batteries reaches a certain level.
Thanks.
G5 xserve Mac OS X (10.4.8)
