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Introduce leo-redundant-manager
1.
Introduce leo_redundant_manager Yosuke Hara @yosukehara May,
2014
2.
storage_0 storage_1 storage_2 [ Actual Nodes
] RING 2 ^ 128 # of replicas = 3 0 2^128 -1 clock-wise Filename = “bucket/leofs.key” Hash = crypto:md5(Filename) Primary node Secondary(1) node Secondary(2) node “Virtual nodes” [Actual Node : Virtual node = 1 : 128] - For restrain unbalanced disc-usage and transaction (requests from gateways) - For restrain effect of data-rebalance Redundant-Manager 1/2 2 Primary node Secondary(1) node Secondary(2) node Object of Replica-nodes 1 “Consisten-hashing”
3.
storage_0 storage_1 storage_2 [ Actual Nodes
] RING 2 ^ 128 # of replicas = 3 0 2^128 -1 “Virtual nodes” [Actual Node : Virtual node = 1 : 128] - For restrain unbalanced disc-usage and transaction (requests from gateways) - For restrain effect of data-rebalance Redundant-Manager 2/2 storage_3 Filename = “bucket/leofs.key” Hash = crypto:md5(Filename) clock-wise Primary node Secondary(1) node Secondary(2) node 2 Primary node Secondary(1) node Secondary(2) node Object of Replica-nodes an attached node Primary node Secondary(1) node Secondary(2) node Object of Replica-nodes <before> <after> 1 “Consisten-hashing”
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