Commit e0a2a217 authored by Julien Muchembled's avatar Julien Muchembled

TODO: tweak should be safer

parent 264f6f57
Pipeline #3992 skipped
......@@ -15,6 +15,7 @@
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import random
import sys
import time
import transaction
from ZODB.POSException import ReadOnlyError, POSKeyError
......@@ -31,7 +32,7 @@ from neo.lib.event import EventManager
from neo.lib.protocol import CellStates, ClusterStates, Packets, \
ZERO_OID, ZERO_TID, MAX_TID, uuid_str
from neo.lib.util import p64
from .. import Patch
from .. import expectedFailure, Patch
from . import ConnectionFilter, NEOCluster, NEOThreadedTest, predictable_random
......@@ -306,6 +307,33 @@ class ReplicationTests(NEOThreadedTest):
self.tic()
self.assertEqual(1, self.checkBackup(backup))
def testSafeTweak(self):
"""
Check that tweak always tries to keep a minimum of (replicas + 1)
readable cells, otherwise we have less/no redundancy as long as
replication has not finished.
"""
def changePartitionTable(orig, *args):
orig(*args)
sys.exit()
cluster = NEOCluster(partitions=3, replicas=1, storage_count=3)
s0, s1, s2 = cluster.storage_list
try:
cluster.start([s0, s1])
s2.start()
self.tic()
cluster.enableStorageList([s2])
# 2 UP_TO_DATE cells should become FEEDING,
# and be dropped only when the replication is done,
# so that 1 storage can still die without data loss.
with Patch(s0.dm, changePartitionTable=changePartitionTable):
cluster.neoctl.tweakPartitionTable()
self.tic()
expectedFailure(self.assertEqual)(cluster.neoctl.getClusterState(),
ClusterStates.RUNNING)
finally:
cluster.stop()
def testReplicationAbortedBySource(self):
"""
Check that a feeding node aborts replication when its partition is
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment