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compression_test.py
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compression_test.py
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import os
import pytest
import logging
from dtest import create_ks
from distutils.version import LooseVersion
from scrub_test import TestHelper
from tools.assertions import assert_crc_check_chance_equal
since = pytest.mark.since
logger = logging.getLogger(__name__)
class TestCompression(TestHelper):
def _get_compression_type(self, file):
types = {
'0010': 'NONE',
'789c': 'DEFLATE'
}
with open(file, 'rb') as fh:
file_start = fh.read(2)
return types.get(file_start.hex(), 'UNKNOWN')
@since("3.0")
def test_disable_compression_cql(self):
"""
@jira_ticket CASSANDRA-8384
using new cql create table syntax to disable compression
"""
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 disabled_compression_table (id uuid PRIMARY KEY ) WITH compression = {'enabled': false};")
session.cluster.refresh_schema_metadata()
meta = session.cluster.metadata.keyspaces['ks'].tables['disabled_compression_table']
assert 'false' == meta.options['compression']['enabled']
for n in range(0, 100):
session.execute("insert into disabled_compression_table (id) values (uuid());")
sstables = self.flush('disabled_compression_table')
sstable_paths = self.get_table_paths('disabled_compression_table')
found = False
for sstable_path in sstable_paths:
sstable = os.path.join(sstable_path, sstables['disabled_compression_table'][1])
if os.path.exists(sstable):
assert 'NONE' == self._get_compression_type(sstable)
found = True
assert found
@since("3.0")
def test_compression_cql_options(self):
"""
@jira_ticket CASSANDRA-8384
using new cql create table syntax to configure compression
"""
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 compression_opts_table
(id uuid PRIMARY KEY )
WITH compression = {
'class': 'DeflateCompressor',
'chunk_length_in_kb': 256
}
AND crc_check_chance = 0.25;
""")
session.cluster.refresh_schema_metadata()
meta = session.cluster.metadata.keyspaces['ks'].tables['compression_opts_table']
assert 'org.apache.cassandra.io.compress.DeflateCompressor' == meta.options['compression']['class']
assert '256' == meta.options['compression']['chunk_length_in_kb']
assert_crc_check_chance_equal(session, "compression_opts_table", 0.25)
if self.cluster.version() < LooseVersion('5.0'):
warn = node.grep_log("The option crc_check_chance was deprecated as a compression option.")
assert len(warn) == 0
session.execute("""
alter table compression_opts_table
WITH compression = {
'class': 'DeflateCompressor',
'chunk_length_in_kb': 256,
'crc_check_chance': 0.6
}
""")
warn = node.grep_log("The option crc_check_chance was deprecated as a compression option.")
assert len(warn) == 1
# check metadata again after crc_check_chance_update
session.cluster.refresh_schema_metadata()
meta = session.cluster.metadata.keyspaces['ks'].tables['compression_opts_table']
assert 'org.apache.cassandra.io.compress.DeflateCompressor' == meta.options['compression']['class']
assert '256' == meta.options['compression']['chunk_length_in_kb']
assert_crc_check_chance_equal(session, "compression_opts_table", 0.6)
for n in range(0, 100):
session.execute("insert into compression_opts_table (id) values (uuid());")
self.flush('compression_opts_table')
# Due to CASSANDRA-15379 we have to compact to get the actual table
# compression to take effect since deflate is a slow compressor
self.perform_node_tool_cmd(cmd='compact', table='compression_opts_table', indexes=list())
sstables = self.get_sstables(table='compression_opts_table', indexes=list())
sstable_paths = self.get_table_paths('compression_opts_table')
found = False
for sstable_path in sstable_paths:
sstable = os.path.join(sstable_path, sstables['compression_opts_table'][1])
if os.path.exists(sstable):
assert 'DEFLATE' == self._get_compression_type(sstable)
found = True
assert found
@since("3.0")
def test_compression_cql_disabled_with_alter(self):
"""
@jira_ticket CASSANDRA-8384
starting with compression enabled then disabling it
"""
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 start_enabled_compression_table
(id uuid PRIMARY KEY )
WITH compression = {
'class': 'SnappyCompressor',
'chunk_length_in_kb': 256
}
AND crc_check_chance = 0.25;
""")
meta = session.cluster.metadata.keyspaces['ks'].tables['start_enabled_compression_table']
assert 'org.apache.cassandra.io.compress.SnappyCompressor' == meta.options['compression']['class']
assert '256' == meta.options['compression']['chunk_length_in_kb']
assert_crc_check_chance_equal(session, "start_enabled_compression_table", 0.25)
session.execute("alter table start_enabled_compression_table with compression = {'enabled': false};")
session.cluster.refresh_schema_metadata()
meta = session.cluster.metadata.keyspaces['ks'].tables['start_enabled_compression_table']
assert 'false' == meta.options['compression']['enabled']
@since("3.0")
def test_compression_cql_enabled_with_alter(self):
"""
@jira_ticket CASSANDRA-8384
starting with compression disabled and enabling it
"""
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 start_disabled_compression_table (id uuid PRIMARY KEY ) WITH compression = {'enabled': false};")
meta = session.cluster.metadata.keyspaces['ks'].tables['start_disabled_compression_table']
assert 'false' == meta.options['compression']['enabled']
session.execute("""alter table start_disabled_compression_table
WITH compression = {
'class': 'SnappyCompressor',
'chunk_length_in_kb': 256
} AND crc_check_chance = 0.25;""")
session.cluster.refresh_schema_metadata()
meta = session.cluster.metadata.keyspaces['ks'].tables['start_disabled_compression_table']
assert 'org.apache.cassandra.io.compress.SnappyCompressor' == meta.options['compression']['class']
assert '256' == meta.options['compression']['chunk_length_in_kb']
assert_crc_check_chance_equal(session, "start_disabled_compression_table", 0.25)