Consider a key-value store where values are stored with a timestamp
to designate each version. Any cluster node that handles the client request
will be able to read the latest version using the current timestamp
at the request processing node.
In the following example, the value ‘Before Dawn’ is updated
to value “After Dawn” at time 2, as per
One of the common techniques used in peer-to-peer systems is to
order cluster nodes according to their ‘age’. The oldest member of
the cluster plays the role of the coordinator for the cluster.
The coordinator is responsible for deciding on membership changes
as well as making decisions such as where
Fixed Partitions should be placed
across cluster nodes.
To
Partitions need to be mapped to cluster nodes.
The mapping also needs to be stored and made accessible to the clients.
It’s common to use a dedicated Consistent Core; this
handles both. The dedicated Consistent Core acts as a coordinator which
keeps track of all nodes in the cluster and maps partitions to nodes.
It also stores the mapping in …
Often it can be difficult to know what the suitable split points are
upfront.In these instances, we can implement auto-splitting.
Here, the coordinator will create only one partition with a
key range which includes all the key space.
Each partition can be configured with a fixed maximum size.
A background task then runs on each cluster node
to track the …
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