def __update_throughput(table_name, key_name, read_units, write_units):
""" Update throughput on the DynamoDB table
:type table_name: str
:param table_name: Name of the DynamoDB table
:type key_name: str
:param key_name: Configuration option key name
:type read_units: int
:param read_units: New read unit provisioning
:type write_units: int
:param write_units: New write unit provisioning
"""
try:
current_ru = dynamodb.get_provisioned_table_read_units(table_name)
current_wu = dynamodb.get_provisioned_table_write_units(table_name)
except JSONResponseError:
raise
# Check table status
try:
table_status = dynamodb.get_table_status(table_name)
except JSONResponseError:
raise
logger.debug('{0} - Table status is {1}'.format(table_name, table_status))
if table_status != 'ACTIVE':
logger.warning(
'{0} - Not performing throughput changes when table '
'is {1}'.format(table_name, table_status))
return
# If this setting is True, we will only scale down when
# BOTH reads AND writes are low
if get_table_option(key_name, 'always_decrease_rw_together'):
read_units, write_units = __calculate_always_decrease_rw_values(
table_name,
read_units,
current_ru,
write_units,
current_wu)
if read_units == current_ru and write_units == current_wu:
logger.info('{0} - No changes to perform'.format(table_name))
return
dynamodb.update_table_provisioning(
table_name,
key_name,
int(read_units),
int(write_units))
def __update_throughput(table_name, key_name, read_units, write_units):
""" Update throughput on the DynamoDB table
:type table_name: str
:param table_name: Name of the DynamoDB table
:type key_name: str
:param key_name: Configuration option key name
:type read_units: int
:param read_units: New read unit provisioning
:type write_units: int
:param write_units: New write unit provisioning
"""
try:
current_ru = dynamodb.get_provisioned_table_read_units(table_name)
current_wu = dynamodb.get_provisioned_table_write_units(table_name)
except JSONResponseError:
raise
# Check table status
try:
table_status = dynamodb.get_table_status(table_name)
except JSONResponseError:
raise
logger.debug('{0} - Table status is {1}'.format(table_name, table_status))
if table_status != 'ACTIVE':
logger.warning(
'{0} - Not performing throughput changes when table '
'is {1}'.format(table_name, table_status))
return
# If this setting is True, we will only scale down when
# BOTH reads AND writes are low
if get_table_option(key_name, 'always_decrease_rw_together'):
read_units, write_units = __calculate_always_decrease_rw_values(
table_name,
read_units,
current_ru,
write_units,
current_wu)
if read_units == current_ru and write_units == current_wu:
logger.info('{0} - No changes to perform'.format(table_name))
return
dynamodb.update_table_provisioning(
table_name,
key_name,
int(read_units),
int(write_units))