class CassandraTokensTestCase(unittest.TestCase):
def setUp(self):
self.cassandraToken = CassandraTokens()
def tearDown(self):
self.cassandraToken = None
def testGenerateRing(self):
self.cassandraToken.nodes(7)
self.cassandraToken.generateRing()
expectedRing = [
0L,
24305883351495604533098186245126300818L,
48611766702991209066196372490252601636L,
72917650054486813599294558735378902454L,
97223533405982418132392744980505203272L,
121529416757478022665490931225631504090L,
145835300108973627198589117470757804908L,
]
self.assertEqual(expectedRing, self.cassandraToken.ring)
def testCalculate10NodesLastToken(self):
self.cassandraToken.nodes(10)
token = self.cassandraToken.calculateToken(9)
expectedToken = 153127065114422308558518573344295695154L
self.assertEqual(expectedToken, token)
def testCalculate1NodeToken1(self):
self.cassandraToken.nodes(1)
token = self.cassandraToken.calculateToken(0)
expectedToken = 0L
self.assertEqual(expectedToken, token)
#!/usr/bin/python
#
# A simple script to generate a set of tokens that can be used in a apache cassandra cluster.
# The script relys on the module "cassandrautil" to be available.
#
# The scripts asks for a cluster size then prints that many keys
#
# Based on benjamin black cassandra summit talk (http://www.slideshare.net/benjaminblack/cassandra-summit-2010-operations-troubleshooting-intro).
# Author: Artie Copeland <*****@*****.**>
# Distributed under the GNU General Public License, version 3.0.
# Latest version: http://github.com/yestech/yessandbox/blob/master/cassandra-gen-tokens.py
#
#
#
from cassandrautil import CassandraTokens
nodes = int(raw_input("How many nodes in the cluster -> "))
t = CassandraTokens()
t.nodes(nodes)
t.generateRing()
t.printTokens()
t.printNodes()
t.printRing()
def setUp(self):
self.cassandraToken = CassandraTokens()