verify instance IP address
Caching layer for DHT node responsibility resolution
Caching layer for DHT node responsibility resolution
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input: key ID to look up
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output: hostname, servicePort
- returning the whole RemoteNodeState would be more future proof in case some other information like node ID were needed
- but this helps providing a clean interface cut and enforce connection via hostname only
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caching behaviour:
- for concurrency: similar to NodeCache handling
- data structure: tree map (Data.Map.Strict)
- cache hit: check age, if expired trigger new lookup in DHT (
requestQueryID) and schedule update, else return cached entry - cache miss: trigger new lookup (
requestQueryID) and insert result into cache - cleaning: periodic cleaning is needed against atttacker triggering a cache fill up by requesting a large number of random hashtags just once
- check on each access vs. short cleaning duration
planning of experiments
proper measurement logging
instrumentation script
select, plan and sample test data
testbed
- first only do a test run with 3 hardcoded nodes
- on success select random nodes, autogenerate testbed configuration and run tests
write a concurrent test program
8ade04e48d
disable online package fetching, only starts to work with cabal 3.4 and needs to be renamed then
Periodically sample own ID through a random botstrapping node for convergence
Refactor common accessor functions of internal and remote NodeState to a type class with 2 types
investigate possible infinite recursion in requestQueryId