Merge "Adding technical details about the memcache pool backend."
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@ -36,7 +36,21 @@ class ClientProxy(object):
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class PooledMemcachedBackend(memcached_backend.MemcachedBackend):
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class PooledMemcachedBackend(memcached_backend.MemcachedBackend):
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"""Memcached backend that does connection pooling."""
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"""Memcached backend that does connection pooling.
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This memcached backend only allows for reuse of a client object,
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prevents too many client object from being instantiated, and maintains
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proper tracking of dead servers so as to limit delays when a server
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(or all servers) become unavailable.
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This backend doesn't allow to load balance things between servers.
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Memcached isn't HA. Values aren't automatically replicated between servers
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unless the client went out and wrote the value multiple time.
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The memcache server to use is determined by `python-memcached` itself by
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picking the host to use (from the given server list) based on a key hash.
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"""
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# Composed from GenericMemcachedBackend's and MemcacheArgs's __init__
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# Composed from GenericMemcachedBackend's and MemcacheArgs's __init__
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def __init__(self, arguments):
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def __init__(self, arguments):
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