def get_server_for_key(key, options = {})
raise ArgumentError, "illegal character in key #{key.inspect}" if
key =~ /\s/
raise ArgumentError, "key too long #{key.inspect}" if key.length > 250
raise MemCacheError, "No servers available" if @servers.empty?
return @servers.first if @servers.length == 1
hkey = hash_for(key)
20.times do |try|
entryidx = Continuum.binary_search(@continuum, hkey)
server = @continuum[entryidx].server
return server if server.alive?
break unless failover
hkey = hash_for "#{try}#{key}"
end
raise MemCacheError, "No servers available"
end