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33 lines
1.2 KiB
Python
33 lines
1.2 KiB
Python
from datetime import datetime
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# ensure an rpc peer is added
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def addpeer(p, rpcpeer):
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pid = rpcpeer['id']
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if not pid in p.avail_peerstate:
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p.avail_peerstate[pid] = {
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'connected' : rpcpeer['connected'],
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'last_seen' : datetime.now() if rpcpeer['connected'] else None,
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'avail' : 1.0 if rpcpeer['connected'] else 0.0
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}
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# exponetially smooth online/offline states of peers
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def trace_availability(p, rpcpeers):
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p.avail_count += 1
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leadwin = max(min(p.avail_window, p.avail_count * p.avail_interval), p.avail_interval)
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samples = leadwin / p.avail_interval
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alpha = 1.0 / samples
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beta = 1.0 - alpha
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for rpcpeer in rpcpeers['peers']:
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pid = rpcpeer['id']
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addpeer(p, rpcpeer)
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if rpcpeer['connected']:
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p.avail_peerstate[pid]['last_seen'] = datetime.now()
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p.avail_peerstate[pid]['connected'] = True
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p.avail_peerstate[pid]['avail'] = 1.0 * alpha + p.avail_peerstate[pid]['avail'] * beta
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else:
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p.avail_peerstate[pid]['connected'] = False
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p.avail_peerstate[pid]['avail'] = 0.0 * alpha + p.avail_peerstate[pid]['avail'] * beta
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