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import time
from tasks.cephfs.cephfs_test_case import CephFSTestCase
from teuthology.exceptions import CommandFailedError
from tasks.cephfs.cephfs_test_case import CephFSTestCase, for_teuthology
class OpenFileTable(CephFSTestCase):
CLIENTS_REQUIRED = 1
MDSS_REQUIRED = 1
def test_max_items_per_obj(self):
"""
The maximum number of openfiles omap objects keys are now equal to
osd_deep_scrub_large_omap_object_key_threshold option.
"""
self.set_conf("mds", "osd_deep_scrub_large_omap_object_key_threshold", "5")
self.fs.mds_restart()
self.fs.wait_for_daemons()
# Write some bytes to a file
size_mb = 1
# Hold the file open
file_count = 8
for i in range(0, file_count):
filename = "open_file{}".format(i)
p = self.mount_a.open_background(filename)
self.mount_a.write_n_mb(filename, size_mb)
time.sleep(10)
"""
With osd_deep_scrub_large_omap_object_key_threshold value as 5 and
opening 8 files we should have a new rados object with name
mds0_openfiles.1 to hold the extra keys.
"""
stat_out = self.fs.rados(["stat", "mds0_openfiles.1"])
# Now close the file
self.mount_a.kill_background(p)
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