def test_hashring2(self):
memcache_servers1 = [
'192.168.0.246:11212', '192.168.0.247:11212',
'192.168.0.249:11212', '192.168.0.250:11212',
'192.168.0.251:11212', '192.168.0.252:11212',
'192.168.0.253:11212', '192.168.0.254:11212',
'192.168.0.255:11212', '192.168.0.256:11212'
]
ring1 = HashRing(memcache_servers1)
my_key = "zhanchenjinssssss"
ring1.get_node("aaaa")
my_value1 = ring1.get_node(my_key)
memcache_servers2 = [
'192.168.0.246:11212', '192.168.0.247:11212',
'192.168.0.249:11212', '192.168.0.250:11212',
'192.168.0.251:11212', '192.168.0.252:11212',
'192.168.0.253:11212', '192.168.0.254:11212',
'192.168.0.255:11212', '192.168.0.256:11212'
]
ring2 = HashRing(memcache_servers2)
ring2.get_node("aaaa")
my_value2 = ring2.get_node(my_key)
self.assertTrue(my_value1 == my_value2)
def test_hashring_self_next_node(self):
"""
判断是否有屏蔽到自己的下一个节点
"""
memcache_servers = ['192.168.0.246:11212']
ring = HashRing(memcache_servers, replicas=1)
test_str = random_str()
select_node = ring.get_node(test_str)
next_nodes = ring.next_nodes(select_node)
self.assertTrue(not next_nodes)
def test_hashring1(self):
memcache_servers = [
'192.168.0.246:11212', '192.168.0.247:11212', '192.168.0.249:11212'
]
ring = HashRing(memcache_servers)
my_key = "zhanchenjinssssss"
self.assertTrue(
ring.get_node(my_key) == ring.get_node(my_key) == ring.get_node(
my_key) == ring.get_node(my_key))
my_key = "gggggggggggggg"
self.assertTrue(
ring.get_node(my_key) == ring.get_node(my_key) == ring.get_node(
my_key) == ring.get_node(my_key))
def test_hashring_has_node(self):
"""
判断是否有节点
"""
memcache_servers = ['192.168.0.246:11212']
ring = HashRing(memcache_servers, replicas=1)
self.assertTrue(ring.has_node('192.168.0.246:11212'))
new_node = '192.168.0.247:11212'
ring.add_node(new_node)
self.assertTrue(ring.has_node(new_node))
ilexist_node = '192.168.0.248:11212'
self.assertTrue(not ring.has_node(ilexist_node))
def test_hashring_next_nodes(self):
"""
判断某个节点删除以后，HashRing给某个相同字符串的定位节点是否和HashRing的next_nodes函数取得的节点一致
"""
memcache_servers = [
'192.168.0.246:11212', '192.168.0.247:11212',
'192.168.0.248:11212', '192.168.0.249:11212'
]
text_cont = 30
for i in xrange(text_cont):
ring = HashRing(memcache_servers, replicas=1)
test_str = random_str(i)
select_node = ring.get_node(test_str)
next_nodes = ring.next_nodes(select_node)
ring.remove_node(select_node)
reselect_node = ring.get_node(test_str)
self.assertTrue(reselect_node in next_nodes)
def __init__(self):
# 虚拟节点必须只有1个，如果多个的话，虽然增加了分布式，但是同时该节点故障的话，也影响多个虚拟节点，进而影响多个实体节点的数据更新
self.__hash_ring = HashRing(replicas=1)
def test_hashring_none(self):
ring1 = HashRing([])
my_key = "zhanchenjinssssss"
self.assertTrue(ring1.get_node(my_key) == None)
