Commit Graph

6 Commits

Author SHA1 Message Date
Felföldi Zsolt
58497f46bd
les, les/flowcontrol: implement LES/3 (#19329)
les, les/flowcontrol: implement LES/3
2019-05-30 20:51:13 +02:00
Felföldi Zsolt
f4fb1a1801 les: fixed cost table update (#19546) 2019-05-13 14:26:47 +03:00
Felföldi Zsolt
85b6823d16 les: check required message types in cost table (#19454) 2019-04-16 14:30:47 +03:00
Felföldi Zsolt
c2003ed63b les, les/flowcontrol: improved request serving and flow control (#18230)
This change

- implements concurrent LES request serving even for a single peer.
- replaces the request cost estimation method with a cost table based on
  benchmarks which gives much more consistent results. Until now the
  allowed number of light peers was just a guess which probably contributed
  a lot to the fluctuating quality of available service. Everything related
  to request cost is implemented in a single object, the 'cost tracker'. It
  uses a fixed cost table with a global 'correction factor'. Benchmark code
  is included and can be run at any time to adapt costs to low-level
  implementation changes.
- reimplements flowcontrol.ClientManager in a cleaner and more efficient
  way, with added capabilities: There is now control over bandwidth, which
  allows using the flow control parameters for client prioritization.
  Target utilization over 100 percent is now supported to model concurrent
  request processing. Total serving bandwidth is reduced during block
  processing to prevent database contention.
- implements an RPC API for the LES servers allowing server operators to
  assign priority bandwidth to certain clients and change prioritized
  status even while the client is connected. The new API is meant for
  cases where server operators charge for LES using an off-protocol mechanism.
- adds a unit test for the new client manager.
- adds an end-to-end test using the network simulator that tests bandwidth
  control functions through the new API.
2019-02-26 12:32:48 +01:00
Matthew Halpern
badaf43019 les: remove redundant type specifiers (#19091) 2019-02-25 12:49:49 +02:00
b00ris
769657060e les: implement ultralight client (#16904)
For more information about this light client mode, read
https://hackmd.io/s/HJy7jjZpm
2019-01-24 12:18:26 +01:00