Data on the server failure recovery

Hi all

The rule of thumb: each 1 GB JVM can store 350 MB of data of the real object, assumes that we have 8 GB of data on the consistency, according to the above rule:

8192/350 = ~ 24 JMVs required = > 24 * 1.2 = 29 ~ GB

Then we have at least 2 servers of 16G RAM.

We plan to have 4 virtual machines Java as cache servers on each of the two servers 16 GB as it advocates cannot have more than 4 GB of heap for each node in the cluster.
I wonder if one of the servers fails, nodes in 4 cluster residing on it go down. If primary and backup of certain data are distributed both within these 4 cluster nodes that descend, then the data is lost even the other server has sufficient capacity for full redundancy.

Is this correct? If so, how to solve? Is smart enough to put main and in the various boxes, not just different node each time as possible consistency?

Hi Henry,.

Not consistency inherently tries to minimize the risk of data loss and automatically checks the backup copy of the data to be kept on a different machine when possible. There is no more adjustment required for it. The StatusHA is the status published by JMX metric of coherence and more details can be found here:

http://docs.Oracle.com/CD/E18686_01/CoH.37/e18682/appendix_mbean.htm

I hope this helps!

See you soon,.
NJ

Tags: Fusion Middleware

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