| import os |
| import random |
| import re |
| import string |
| import tempfile |
| import time |
| from distutils.version import LooseVersion |
| import pytest |
| import parse |
| import logging |
| |
| from dtest import Tester, create_ks |
| from tools.assertions import assert_length_equal, assert_none, assert_one |
| |
| since = pytest.mark.since |
| logger = logging.getLogger(__name__) |
| |
| strategies = ['LeveledCompactionStrategy', 'SizeTieredCompactionStrategy', 'DateTieredCompactionStrategy'] |
| |
| |
| class TestCompaction(Tester): |
| |
| @pytest.fixture(scope='function', autouse=True) |
| def fixture_set_cluster_log_level(self, fixture_dtest_setup): |
| # compaction test for version 2.2.2 and above relies on DEBUG log in debug.log |
| fixture_dtest_setup.cluster.set_log_level("DEBUG") |
| |
| @pytest.mark.parametrize("strategy", strategies) |
| @since('0', max_version='2.2.X') |
| def test_compaction_delete(self, strategy): |
| """ |
| Test that executing a delete properly tombstones a row. |
| Insert data, delete a partition of data and check that the requesite rows are tombstoned. |
| """ |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node1] = cluster.nodelist() |
| |
| session = self.patient_cql_connection(node1) |
| create_ks(session, 'ks', 1) |
| |
| session.execute("create table ks.cf (key int PRIMARY KEY, val int) with compaction = {'class':'" + strategy + "'} and gc_grace_seconds = 30;") |
| |
| for x in range(0, 100): |
| session.execute('insert into cf (key, val) values (' + str(x) + ',1)') |
| |
| node1.flush() |
| for x in range(0, 10): |
| session.execute('delete from cf where key = ' + str(x)) |
| |
| node1.flush() |
| for x in range(0, 10): |
| assert_none(session, 'select * from cf where key = ' + str(x)) |
| |
| json_path = tempfile.mkstemp(suffix='.json') |
| jname = json_path[1] |
| with open(jname, 'w') as f: |
| node1.run_sstable2json(f) |
| |
| with open(jname, 'r') as g: |
| jsoninfo = g.read() |
| |
| numfound = jsoninfo.count("markedForDeleteAt") |
| |
| assert numfound == 10 |
| |
| def test_data_size(self): |
| """ |
| Ensure that data size does not have unwarranted increases after compaction. |
| Insert data and check data size before and after a compaction. |
| """ |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node1] = cluster.nodelist() |
| |
| stress_write(node1) |
| |
| node1.flush() |
| |
| table_name = 'standard1' |
| output = node1.nodetool('cfstats').stdout |
| if output.find(table_name) != -1: |
| output = output[output.find(table_name):] |
| output = output[output.find("Space used (live)"):] |
| initialValue = int(output[output.find(":") + 1:output.find("\n")].strip()) |
| else: |
| logger.debug("datasize not found") |
| logger.debug(output) |
| |
| node1.flush() |
| node1.compact() |
| node1.wait_for_compactions() |
| |
| output = node1.nodetool('cfstats').stdout |
| if output.find(table_name) != -1: |
| output = output[output.find(table_name):] |
| output = output[output.find("Space used (live)"):] |
| finalValue = int(output[output.find(":") + 1:output.find("\n")].strip()) |
| else: |
| logger.debug("datasize not found") |
| # allow 5% size increase - if we have few sstables it is not impossible that live size increases *slightly* after compaction |
| assert finalValue < initialValue * 1.05 |
| |
| @pytest.mark.parametrize("strategy", strategies) |
| def test_bloomfilter_size(self, strategy): |
| """ |
| @jira_ticket CASSANDRA-11344 |
| Check that bloom filter size is between 50KB and 100KB for 100K keys |
| """ |
| if not hasattr(self, 'strategy') or strategy == "LeveledCompactionStrategy": |
| strategy_string = 'strategy=LeveledCompactionStrategy,sstable_size_in_mb=1' |
| min_bf_size = 40000 |
| max_bf_size = 100000 |
| else: |
| if strategy == "DateTieredCompactionStrategy": |
| strategy_string = "strategy=DateTieredCompactionStrategy,base_time_seconds=86400" # we want a single sstable, so make sure we don't have a tiny first window |
| else: |
| strategy_string = "strategy={}".format(strategy) |
| min_bf_size = 100000 |
| max_bf_size = 150000 |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node1] = cluster.nodelist() |
| |
| for x in range(0, 5): |
| node1.stress(['write', 'n=100K', "no-warmup", "cl=ONE", "-rate", |
| "threads=300", "-schema", "replication(factor=1)", |
| "compaction({},enabled=false)".format(strategy_string)]) |
| node1.flush() |
| |
| node1.nodetool('enableautocompaction') |
| node1.wait_for_compactions() |
| |
| table_name = 'standard1' |
| output = node1.nodetool('cfstats').stdout |
| output = output[output.find(table_name):] |
| output = output[output.find("Bloom filter space used"):] |
| bfSize = int(output[output.find(":") + 1:output.find("\n")].strip()) |
| |
| # in some rare cases we can end up with more than one sstable per data directory with |
| # non-lcs strategies (see CASSANDRA-12323) |
| if not hasattr(self, 'strategy') or strategy == "LeveledCompactionStrategy": |
| size_factor = 1 |
| else: |
| sstable_count = len(node1.get_sstables('keyspace1', 'standard1')) |
| dir_count = len(node1.data_directories()) |
| logger.debug("sstable_count is: {}".format(sstable_count)) |
| logger.debug("dir_count is: {}".format(dir_count)) |
| if node1.get_cassandra_version() < LooseVersion('3.2'): |
| size_factor = sstable_count |
| else: |
| size_factor = sstable_count / float(dir_count) |
| |
| logger.debug("bloom filter size is: {}".format(bfSize)) |
| logger.debug("size factor = {}".format(size_factor)) |
| assert bfSize >= size_factor * min_bf_size |
| assert bfSize <= size_factor * max_bf_size |
| |
| @pytest.mark.parametrize("strategy", strategies) |
| def test_sstable_deletion(self, strategy): |
| """ |
| Test that sstables are deleted properly when able after compaction. |
| Insert data setting gc_grace_seconds to 0, and determine sstable |
| is deleted upon data deletion. |
| """ |
| self.skip_if_no_major_compaction(strategy) |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node1] = cluster.nodelist() |
| session = self.patient_cql_connection(node1) |
| create_ks(session, 'ks', 1) |
| session.execute("create table cf (key int PRIMARY KEY, val int) with gc_grace_seconds = 0 and compaction= {'class':'" + strategy + "'}") |
| |
| for x in range(0, 100): |
| session.execute('insert into cf (key, val) values (' + str(x) + ',1)') |
| node1.flush() |
| for x in range(0, 100): |
| session.execute('delete from cf where key = ' + str(x)) |
| |
| node1.flush() |
| node1.nodetool("compact ks cf") |
| node1.wait_for_compactions() |
| time.sleep(1) |
| try: |
| for data_dir in node1.data_directories(): |
| cfs = os.listdir(os.path.join(data_dir, "ks")) |
| ssdir = os.listdir(os.path.join(data_dir, "ks", cfs[0])) |
| for afile in ssdir: |
| assert not "Data" in afile, afile |
| |
| except OSError: |
| self.fail("Path to sstables not valid.") |
| |
| @pytest.mark.parametrize("strategy", ['DateTieredCompactionStrategy']) |
| def test_dtcs_deletion(self, strategy): |
| """ |
| Test that sstables are deleted properly when able after compaction with |
| DateTieredCompactionStrategy. |
| Insert data setting max_sstable_age_days low, and determine sstable |
| is deleted upon data deletion past max_sstable_age_days. |
| """ |
| if strategy != 'DateTieredCompactionStrategy': |
| pytest.skip('Not implemented unless DateTieredCompactionStrategy is used') |
| |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node1] = cluster.nodelist() |
| session = self.patient_cql_connection(node1) |
| create_ks(session, 'ks', 1) |
| # max sstable age is 0.5 minute: |
| session.execute("""create table cf (key int PRIMARY KEY, val int) with gc_grace_seconds = 0 |
| and compaction= {'class':'DateTieredCompactionStrategy', 'max_sstable_age_days':0.00035, 'min_threshold':2}""") |
| |
| # insert data |
| for x in range(0, 300): |
| session.execute('insert into cf (key, val) values (' + str(x) + ',1) USING TTL 35') |
| node1.flush() |
| time.sleep(40) |
| expired_sstables = node1.get_sstables('ks', 'cf') |
| expected_sstable_count = 1 |
| if self.cluster.version() > LooseVersion('3.1'): |
| expected_sstable_count = cluster.data_dir_count |
| assert len(expired_sstables) == expected_sstable_count |
| # write a new sstable to make DTCS check for expired sstables: |
| for x in range(0, 100): |
| session.execute('insert into cf (key, val) values ({}, {})'.format(x, x)) |
| node1.flush() |
| time.sleep(5) |
| # we only check every 10 minutes - sstable should still be there: |
| for expired_sstable in expired_sstables: |
| assert expired_sstable, node1.get_sstables('ks' in 'cf') |
| |
| session.execute("alter table cf with compaction = {'class':'DateTieredCompactionStrategy', 'max_sstable_age_days':0.00035, 'min_threshold':2, 'expired_sstable_check_frequency_seconds':0}") |
| time.sleep(1) |
| for x in range(0, 100): |
| session.execute('insert into cf (key, val) values ({}, {})'.format(x, x)) |
| node1.flush() |
| time.sleep(5) |
| for expired_sstable in expired_sstables: |
| assert expired_sstable, node1.get_sstables('ks' not in 'cf') |
| |
| def test_compaction_throughput(self): |
| """ |
| Test setting compaction throughput. |
| Set throughput, insert data and ensure compaction performance corresponds. |
| """ |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node1] = cluster.nodelist() |
| |
| # disableautocompaction only disables compaction for existing tables, |
| # so initialize stress tables with stress first |
| stress_write(node1, keycount=1) |
| node1.nodetool('disableautocompaction') |
| |
| stress_write(node1, keycount=200000 * cluster.data_dir_count) |
| |
| threshold = "5" |
| node1.nodetool('setcompactionthroughput -- ' + threshold) |
| |
| node1.flush() |
| if node1.get_cassandra_version() < '2.2': |
| log_file = 'system.log' |
| else: |
| log_file = 'debug.log' |
| mark = node1.mark_log(filename=log_file) |
| node1.compact() |
| matches = node1.watch_log_for('Compacted', from_mark=mark, filename=log_file) |
| |
| stringline = matches[0] |
| |
| throughput_pattern = '{}={avgthroughput:f}{units}/s' |
| m = parse.search(throughput_pattern, stringline) |
| avgthroughput = m.named['avgthroughput'] |
| found_units = m.named['units'] |
| |
| unit_conversion_dct = { |
| "MB": 1, |
| "MiB": 1, |
| "KiB": 1. / 1024, |
| "GiB": 1024 |
| } |
| |
| units = ['MB'] if cluster.version() < LooseVersion('3.6') else ['KiB', 'MiB', 'GiB'] |
| assert found_units in units |
| |
| logger.debug(avgthroughput) |
| avgthroughput_mb = unit_conversion_dct[found_units] * float(avgthroughput) |
| |
| # The throughput in the log is computed independantly from the throttling and on the output files while |
| # throttling is on the input files, so while that throughput shouldn't be higher than the one set in |
| # principle, a bit of wiggle room is expected |
| assert float(threshold) + 0.5 >= avgthroughput_mb |
| |
| @pytest.mark.parametrize("strategy", strategies) |
| def test_compaction_strategy_switching(self, strategy): |
| """ |
| Ensure that switching strategies does not result in problems. |
| Insert data, switch strategies, then check against data loss. |
| """ |
| strategies = ['LeveledCompactionStrategy', 'SizeTieredCompactionStrategy', 'DateTieredCompactionStrategy'] |
| |
| if strategy in strategies: |
| strategies.remove(strategy) |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node1] = cluster.nodelist() |
| |
| for strat in strategies: |
| session = self.patient_cql_connection(node1) |
| create_ks(session, 'ks', 1) |
| |
| session.execute("create table ks.cf (key int PRIMARY KEY, val int) with gc_grace_seconds = 0 and compaction= {'class':'" + strategy + "'};") |
| |
| for x in range(0, 100): |
| session.execute('insert into ks.cf (key, val) values (' + str(x) + ',1)') |
| |
| node1.flush() |
| |
| for x in range(0, 10): |
| session.execute('delete from cf where key = ' + str(x)) |
| |
| session.execute("alter table ks.cf with compaction = {'class':'" + strat + "'};") |
| |
| for x in range(11, 100): |
| assert_one(session, "select * from ks.cf where key =" + str(x), [x, 1]) |
| |
| for x in range(0, 10): |
| assert_none(session, 'select * from cf where key = ' + str(x)) |
| |
| node1.flush() |
| cluster.clear() |
| time.sleep(5) |
| cluster.start() |
| |
| def test_large_compaction_warning(self): |
| """ |
| @jira_ticket CASSANDRA-9643 |
| Check that we log a warning when the partition size is bigger than compaction_large_partition_warning_threshold_mb |
| """ |
| cluster = self.cluster |
| cluster.set_configuration_options({'compaction_large_partition_warning_threshold_mb': 1}) |
| cluster.populate(1).start() |
| [node] = cluster.nodelist() |
| |
| session = self.patient_cql_connection(node) |
| create_ks(session, 'ks', 1) |
| |
| mark = node.mark_log() |
| strlen = (1024 * 1024) / 100 |
| session.execute("CREATE TABLE large(userid text PRIMARY KEY, properties map<int, text>) with compression = {}") |
| for i in range(200): # ensures partition size larger than compaction_large_partition_warning_threshold_mb |
| session.execute("UPDATE ks.large SET properties[%i] = '%s' WHERE userid = 'user'" % (i, get_random_word(strlen))) |
| |
| ret = list(session.execute("SELECT properties from ks.large where userid = 'user'")) |
| assert_length_equal(ret, 1) |
| assert 200 == len(list(ret[0][0].keys())) |
| |
| node.flush() |
| |
| node.nodetool('compact ks large') |
| verb = 'Writing' if self.cluster.version() > '2.2' else 'Compacting' |
| sizematcher = '\d+ bytes' if self.cluster.version() < LooseVersion('3.6') else '\d+\.\d{3}(K|M|G)iB' |
| node.watch_log_for('{} large partition ks/large:user \({}'.format(verb, sizematcher), from_mark=mark, timeout=180) |
| |
| ret = list(session.execute("SELECT properties from ks.large where userid = 'user'")) |
| assert_length_equal(ret, 1) |
| assert 200 == len(list(ret[0][0].keys())) |
| |
| @pytest.mark.parametrize("strategy", strategies) |
| def test_disable_autocompaction_nodetool(self, strategy): |
| """ |
| Make sure we can enable/disable compaction using nodetool |
| """ |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node] = cluster.nodelist() |
| session = self.patient_cql_connection(node) |
| create_ks(session, 'ks', 1) |
| session.execute('CREATE TABLE to_disable (id int PRIMARY KEY, d TEXT) WITH compaction = {{\'class\':\'{0}\'}}'.format(strategy)) |
| node.nodetool('disableautocompaction ks to_disable') |
| for i in range(1000): |
| session.execute('insert into to_disable (id, d) values ({0}, \'{1}\')'.format(i, 'hello' * 100)) |
| if i % 100 == 0: |
| node.flush() |
| if node.get_cassandra_version() < '2.2': |
| log_file = 'system.log' |
| else: |
| log_file = 'debug.log' |
| assert len(node.grep_log('Compacting.+to_disable', filename=log_file)) == 0, 'Found compaction log items for {0}'.format(strategy) |
| node.nodetool('enableautocompaction ks to_disable') |
| # sleep to allow compactions to start |
| time.sleep(2) |
| assert len(node.grep_log('Compacting.+to_disable', filename=log_file)) > 0, 'Found no log items for {0}'.format(strategy) |
| |
| @pytest.mark.parametrize("strategy", strategies) |
| def test_disable_autocompaction_schema(self, strategy): |
| """ |
| Make sure we can disable compaction via the schema compaction parameter 'enabled' = false |
| """ |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node] = cluster.nodelist() |
| session = self.patient_cql_connection(node) |
| create_ks(session, 'ks', 1) |
| session.execute('CREATE TABLE to_disable (id int PRIMARY KEY, d TEXT) WITH compaction = {{\'class\':\'{0}\', \'enabled\':\'false\'}}'.format(strategy)) |
| for i in range(1000): |
| session.execute('insert into to_disable (id, d) values ({0}, \'{1}\')'.format(i, 'hello' * 100)) |
| if i % 100 == 0: |
| node.flush() |
| if node.get_cassandra_version() < '2.2': |
| log_file = 'system.log' |
| else: |
| log_file = 'debug.log' |
| |
| assert len(node.grep_log('Compacting.+to_disable', filename=log_file)) == 0, 'Found compaction log items for {0}'.format(strategy) |
| # should still be disabled after restart: |
| node.stop() |
| node.start(wait_for_binary_proto=True) |
| session = self.patient_cql_connection(node) |
| session.execute("use ks") |
| # sleep to make sure we dont start any logs |
| time.sleep(2) |
| assert len(node.grep_log('Compacting.+to_disable', filename=log_file)) == 0, 'Found compaction log items for {0}'.format(strategy) |
| node.nodetool('enableautocompaction ks to_disable') |
| # sleep to allow compactions to start |
| time.sleep(2) |
| assert len(node.grep_log('Compacting.+to_disable', filename=log_file)) > 0, 'Found no log items for {0}'.format(strategy) |
| |
| @pytest.mark.parametrize("strategy", strategies) |
| def test_disable_autocompaction_alter(self, strategy): |
| """ |
| Make sure we can enable compaction using an alter-statement |
| """ |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node] = cluster.nodelist() |
| session = self.patient_cql_connection(node) |
| create_ks(session, 'ks', 1) |
| session.execute('CREATE TABLE to_disable (id int PRIMARY KEY, d TEXT) WITH compaction = {{\'class\':\'{0}\'}}'.format(strategy)) |
| session.execute('ALTER TABLE to_disable WITH compaction = {{\'class\':\'{0}\', \'enabled\':\'false\'}}'.format(strategy)) |
| for i in range(1000): |
| session.execute('insert into to_disable (id, d) values ({0}, \'{1}\')'.format(i, 'hello' * 100)) |
| if i % 100 == 0: |
| node.flush() |
| if node.get_cassandra_version() < '2.2': |
| log_file = 'system.log' |
| else: |
| log_file = 'debug.log' |
| assert len(node.grep_log('Compacting.+to_disable', filename=log_file)) == 0, 'Found compaction log items for {0}'.format(strategy) |
| session.execute('ALTER TABLE to_disable WITH compaction = {{\'class\':\'{0}\', \'enabled\':\'true\'}}'.format(strategy)) |
| # we need to flush atleast once when altering to enable: |
| session.execute('insert into to_disable (id, d) values (99, \'hello\')') |
| node.flush() |
| # sleep to allow compactions to start |
| time.sleep(2) |
| assert len(node.grep_log('Compacting.+to_disable', filename=log_file)) > 0, 'Found no log items for {0}'.format(strategy) |
| |
| @pytest.mark.parametrize("strategy", strategies) |
| def test_disable_autocompaction_alter_and_nodetool(self, strategy): |
| """ |
| Make sure compaction stays disabled after an alter statement where we have disabled using nodetool first |
| """ |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node] = cluster.nodelist() |
| session = self.patient_cql_connection(node) |
| create_ks(session, 'ks', 1) |
| session.execute('CREATE TABLE to_disable (id int PRIMARY KEY, d TEXT) WITH compaction = {{\'class\':\'{0}\'}}'.format(strategy)) |
| node.nodetool('disableautocompaction ks to_disable') |
| for i in range(1000): |
| session.execute('insert into to_disable (id, d) values ({0}, \'{1}\')'.format(i, 'hello' * 100)) |
| if i % 100 == 0: |
| node.flush() |
| if node.get_cassandra_version() < '2.2': |
| log_file = 'system.log' |
| else: |
| log_file = 'debug.log' |
| assert len(node.grep_log('Compacting.+to_disable', filename=log_file)) == 0, 'Found compaction log items for {0}'.format(strategy) |
| session.execute('ALTER TABLE to_disable WITH compaction = {{\'class\':\'{0}\', \'tombstone_threshold\':0.9}}'.format(strategy)) |
| session.execute('insert into to_disable (id, d) values (99, \'hello\')') |
| node.flush() |
| time.sleep(2) |
| assert len(node.grep_log('Compacting.+to_disable', filename=log_file)) == 0, 'Found log items for {0}'.format(strategy) |
| node.nodetool('enableautocompaction ks to_disable') |
| # sleep to allow compactions to start |
| time.sleep(2) |
| assert len(node.grep_log('Compacting.+to_disable', filename=log_file)) > 0, 'Found no log items for {0}'.format(strategy) |
| |
| @since('3.7') |
| def test_user_defined_compaction(self): |
| """ |
| Test a user defined compaction task by generating a few sstables with cassandra stress |
| and autocompaction disabled, and then passing a list of sstable data files directly to nodetool compact. |
| Check that after compaction there is only one sstable per node directory. Make sure to use sstableutil |
| to list only final files because after a compaction some temporary files may still not have been deleted. |
| |
| @jira_ticket CASSANDRA-11765 |
| """ |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node1] = cluster.nodelist() |
| |
| # disableautocompaction only disables compaction for existing tables, |
| # so initialize stress tables with stress first |
| stress_write(node1, keycount=1) |
| node1.nodetool('disableautocompaction') |
| |
| stress_write(node1, keycount=500000) |
| node1.nodetool('flush keyspace1 standard1') |
| |
| sstable_files = ' '.join(node1.get_sstable_data_files('keyspace1', 'standard1')) |
| logger.debug('Compacting {}'.format(sstable_files)) |
| node1.nodetool('compact --user-defined {}'.format(sstable_files)) |
| |
| sstable_files = node1.get_sstable_data_files('keyspace1', 'standard1') |
| assert len(node1.data_directories()) == len(sstable_files), \ |
| 'Expected one sstable data file per node directory but got {}'.format(sstable_files) |
| |
| @pytest.mark.parametrize("strategy", ['LeveledCompactionStrategy']) |
| @since('3.10') |
| def test_fanout_size(self, strategy): |
| """ |
| @jira_ticket CASSANDRA-11550 |
| """ |
| if not hasattr(self, 'strategy') or strategy != 'LeveledCompactionStrategy': |
| pytest.skip('Not implemented unless LeveledCompactionStrategy is used') |
| |
| cluster = self.cluster |
| cluster.populate(1).start() |
| [node1] = cluster.nodelist() |
| |
| stress_write(node1, keycount=1) |
| node1.nodetool('disableautocompaction') |
| |
| session = self.patient_cql_connection(node1) |
| logger.debug("Altering compaction strategy to LCS") |
| session.execute("ALTER TABLE keyspace1.standard1 with compaction={'class': 'LeveledCompactionStrategy', 'sstable_size_in_mb':1, 'fanout_size':10};") |
| |
| stress_write(node1, keycount=1000000) |
| node1.nodetool('flush keyspace1 standard1') |
| |
| # trigger the compaction |
| node1.compact() |
| |
| # check the sstable count in each level |
| table_name = 'standard1' |
| output = grep_sstables_in_each_level(node1, table_name) |
| |
| # [0, ?/10, ?, 0, 0, 0...] |
| p = re.compile(r'0,\s(\d+)/10,.*') |
| m = p.search(output) |
| assert 10 * len(node1.data_directories()) == int(m.group(1)) |
| |
| logger.debug("Altering the fanout_size") |
| session.execute("ALTER TABLE keyspace1.standard1 with compaction={'class': 'LeveledCompactionStrategy', 'sstable_size_in_mb':1, 'fanout_size':5};") |
| |
| # trigger the compaction |
| node1.compact() |
| # check the sstable count in each level again |
| output = grep_sstables_in_each_level(node1, table_name) |
| |
| # [0, ?/5, ?/25, ?, 0, 0...] |
| p = re.compile(r'0,\s(\d+)/5,\s(\d+)/25,.*') |
| m = p.search(output) |
| assert 5 * len(node1.data_directories()) == int(m.group(1)) |
| assert 25 * len(node1.data_directories()) == int(m.group(2)) |
| |
| def skip_if_no_major_compaction(self, strategy): |
| if self.cluster.version() < '2.2' and strategy == 'LeveledCompactionStrategy': |
| pytest.skip(msg='major compaction not implemented for LCS in this version of Cassandra') |
| |
| |
| def grep_sstables_in_each_level(node, table_name): |
| output = node.nodetool('cfstats').stdout |
| output = output[output.find(table_name):] |
| output = output[output.find("SSTables in each level"):] |
| return output[output.find(":") + 1:output.find("\n")].strip() |
| |
| |
| def get_random_word(wordLen, population=string.ascii_letters + string.digits): |
| return ''.join([random.choice(population) for _ in range(int(wordLen))]) |
| |
| |
| def stress_write(node, keycount=100000): |
| node.stress(['write', 'n={keycount}'.format(keycount=keycount)]) |
