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29 lines
1.0 KiB
Python
29 lines
1.0 KiB
Python
# 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 pid not in p.persist['peerstate']:
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p.persist['peerstate'][pid] = {
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'connected': rpcpeer['connected'],
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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.persist['availcount'] += 1
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leadwin = max(min(p.avail_window, p.persist['availcount'] * 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.persist['peerstate'][pid]['connected'] = True
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p.persist['peerstate'][pid]['avail'] = 1.0 * alpha + p.persist['peerstate'][pid]['avail'] * beta
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else:
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p.persist['peerstate'][pid]['connected'] = False
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p.persist['peerstate'][pid]['avail'] = 0.0 * alpha + p.persist['peerstate'][pid]['avail'] * beta
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