def _validate_setting_cache_value(value_to_verify):
disk_config_params = GeneralVDisk.get_config_params(vdisk)
disk_config_params['metadata_cache_size'] = value_to_verify
GeneralVDisk.set_config_params(vdisk, {'new_config_params': disk_config_params})
disk_config_params = GeneralVDisk.get_config_params(vdisk)
actual_value = disk_config_params['metadata_cache_size']
assert actual_value == value_to_verify,\
'Value after set/get differs, actual: {0}, expected: {1}'.format(actual_value, value_to_verify)
def ovs_3756_metadata_size_test():
"""
Validate get/set metadata cache size for a vdisk
"""
disk_name = 'ovs-3756-disk'
loop = 'loop0'
vpool = GeneralVPool.get_vpool_by_name(TestVDisk.vpool_name)
# vdisk_size in GiB
vdisk_size = 2
vdisk = GeneralVDisk.create_volume(size=vdisk_size, vpool=vpool, name=disk_name, loop_device=loop, wait=True)
storagedriver_config = StorageDriverConfiguration('storagedriver', vdisk.vpool_guid, vdisk.storagedriver_id)
# "size" of a page = amount of entries in a page (addressable by 6 bits)
metadata_page_capacity = 64
cluster_size = storagedriver_config.configuration.get('volume_manager', {}).get('default_cluster_size', 4096)
cache_capacity = int(min(vdisk.size, 2 * 1024 ** 4) / float(metadata_page_capacity * cluster_size))
default_metadata_cache_size = StorageDriverClient.DEFAULT_METADATA_CACHE_SIZE
def _validate_setting_cache_value(value_to_verify):
if value_to_verify > default_metadata_cache_size:
value_to_verify = default_metadata_cache_size
disk_config_params = GeneralVDisk.get_config_params(vdisk)
disk_config_params['metadata_cache_size'] = value_to_verify
GeneralVDisk.set_config_params(vdisk, {'new_config_params': disk_config_params})
disk_config_params = GeneralVDisk.get_config_params(vdisk)
actual_value = disk_config_params['metadata_cache_size']
assert actual_value == value_to_verify,\
'Value after set/get differs, actual: {0}, expected: {1}'.format(actual_value, value_to_verify)
config_params = GeneralVDisk.get_config_params(vdisk)
# validate default metadata cache as it was not set explicitly
default_implicit_value = config_params['metadata_cache_size']
assert default_implicit_value == default_metadata_cache_size,\
'Expected default cache size: {0}, got {1}'.format(default_metadata_cache_size, default_implicit_value)
# verify set/get of specific value - larger than default
_validate_setting_cache_value(10000 * cache_capacity)
# verify set/get of specific value - default value
_validate_setting_cache_value(default_metadata_cache_size)
GeneralVDisk.delete_volume(vdisk=vdisk, vpool=vpool, loop_device=loop, wait=True)
def ovs_3756_metadata_size_test():
"""
Validate get/set metadata cache size for a vdisk
"""
metadata_cache_page_size = 256 * 24
default_metadata_cache_size = 8192 * metadata_cache_page_size
disk_name = 'ovs-3756-disk'
loop = 'loop0'
vpool = GeneralVPool.get_vpool_by_name(TestVDisk.vpool_name)
vdisk = GeneralVDisk.create_volume(size=2, vpool=vpool, name=disk_name, loop_device=loop, wait=True)
def _validate_setting_cache_value(value_to_verify):
disk_config_params = GeneralVDisk.get_config_params(vdisk)
disk_config_params['metadata_cache_size'] = value_to_verify
GeneralVDisk.set_config_params(vdisk, {'new_config_params': disk_config_params})
disk_config_params = GeneralVDisk.get_config_params(vdisk)
actual_value = disk_config_params['metadata_cache_size']
assert actual_value == value_to_verify,\
'Value after set/get differs, actual: {0}, expected: {1}'.format(actual_value, value_to_verify)
config_params = GeneralVDisk.get_config_params(vdisk)
# validate default metadata cache as it was not set explicitly
default_implicit_value = config_params['metadata_cache_size']
assert default_implicit_value == default_metadata_cache_size,\
'Expected default cache size: {0}, got {1}'.format(default_metadata_cache_size, default_implicit_value)
# verify set/get of specific value - larger than default
_validate_setting_cache_value(10000 * metadata_cache_page_size)
# verify set/get of specific value - default value
_validate_setting_cache_value(default_metadata_cache_size)
# verify set/get of specific value - smaller than default value
_validate_setting_cache_value(100 * metadata_cache_page_size)
GeneralVDisk.delete_volume(vdisk=vdisk, vpool=vpool, loop_device=loop, wait=True)
