[store] meta: support remote write; refactor boot()#528
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- Dfs: operates meta through MetaNode, instead of through RPC.
- MetaNode: separate initialization functions:
- MetaNode::boot() to setup a new cluster with one node.
- MetaNode::boot_non_voter() to initialize a node that is going to
be added to an existent cluster.
- MetaNode::new() to start a initialized node that belongs to a
cluster.
- MetaNode: new() now gets everything ready. There is no need to start
meta-grpc manually.
- MetaNode: add several util func to operating on cluster info, such as
get_node_addr() and add_node().
- MetaNode: remove cached metrics data. Use raft metrics channel
instead, which provides blocking watch and data cache.
- MetaNode: add builder() to create a customizable constructor.
- MetaNode: support forwarded write to remote leader. A non-leader node
use MetaNode::write() to commit a meta changes.
- MetaNode: get_leader() to retrieve the latest leader the node knows
of.
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Dfs: operates meta through MetaNode, instead of through RPC.
MetaNode: separate initialization functions:
be added to an existent cluster.
cluster.
MetaNode: new() now gets everything ready. There is no need to start
meta-grpc manually.
MetaNode: add several util func to operating on cluster info, such as
get_node_addr() and add_node().
MetaNode: remove cached metrics data. Use raft metrics channel
instead, which provides blocking watch and data cache.
MetaNode: add builder() to create a customizable constructor.
MetaNode: support forwarded write to the remote leader. A non-leader node
use MetaNode::write() to commit a meta changes.
MetaNode: get_leader() to retrieve the latest leader the node knows
of.
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Related Issues
#271