def backend(request):
(backend_info, comprenc_kind) = request.param
if backend_info.classname == 'local':
gen = yield_local_backend(backend_info)
elif 'request_handler' in backend_info:
gen = yield_mock_backend(backend_info)
else:
gen = yield_remote_backend(backend_info)
for raw_backend in gen:
if comprenc_kind == 'raw':
backend = raw_backend
elif comprenc_kind == 'plain':
backend = ComprencBackend(None, (None, 6), raw_backend)
elif comprenc_kind == 'aes+zlib':
backend = ComprencBackend(b'schlurz', ('zlib', 6), raw_backend)
elif comprenc_kind == 'aes':
backend = ComprencBackend(b'schlurz', (None, 6), raw_backend)
else:
backend = ComprencBackend(None, (comprenc_kind, 6), raw_backend)
backend.unittest_info = raw_backend.unittest_info
yield backend
def test_retrieve(backend, db):
plain_backend = backend
backend = ComprencBackend(b'schnorz', ('zlib', 6), plain_backend)
# Create a few objects in db
obj_ids = (22, 25, 30, 31)
for id_ in obj_ids:
db.execute('INSERT INTO objects (id, refcount, size) VALUES(?, ?, ?)',
(id_, 1, 27 * id_))
# Object one will be missing in backend
# Object two will have a checksum error in the data
key = 's3ql_data_%d' % obj_ids[1]
backend[key] = b'some data that will be broken on a data check'
(raw, meta) = plain_backend.fetch(key)
raw = bytearray(raw)
assert len(raw) > 20
raw[-10:-6] = b'forg'
plain_backend.store(key, raw, meta)
# Object three will have a checksum error in the metadata
key = 's3ql_data_%d' % obj_ids[2]
backend.store(key, b'some data that will be broken on a metadata check',
{ 'meta-key1': 'some textual data that just increases',
'meta-key2': 'the metadata size so that we can tamper with it' })
meta = plain_backend.lookup(key)
raw = bytearray(meta['data'])
assert len(raw) > 20
raw[-10:-6] = b'forg'
meta['data'] = raw
plain_backend.update_meta(key, meta)
# Object four will be ok
backend['s3ql_data_%d' % obj_ids[3]] = b'some data that is well'
# When using a single thread, we can fake the backend factory
def backend_factory():
return backend
missing_fh = io.StringIO()
corrupted_fh = io.StringIO()
with assert_logs('^Backend seems to have lost', count=1, level=logging.WARNING), \
assert_logs('^Object %d is corrupted', count=1, level=logging.WARNING):
verify.retrieve_objects(db, backend_factory, corrupted_fh, missing_fh,
thread_count=1, full=False)
assert missing_fh.getvalue() == 's3ql_data_%d\n' % obj_ids[0]
assert corrupted_fh.getvalue() == 's3ql_data_%d\n' % obj_ids[2]
missing_fh = io.StringIO()
corrupted_fh = io.StringIO()
with assert_logs('^Backend seems to have lost', count=1, level=logging.WARNING), \
assert_logs('^Object %d is corrupted', count=2, level=logging.WARNING):
verify.retrieve_objects(db, backend_factory, corrupted_fh, missing_fh,
thread_count=1, full=True)
assert missing_fh.getvalue() == 's3ql_data_%d\n' % obj_ids[0]
assert corrupted_fh.getvalue() == ('s3ql_data_%d\n'*2) % obj_ids[1:3]
def test_retrieve(backend, db):
plain_backend = backend
backend = ComprencBackend(b'schnorz', ('zlib', 6), plain_backend)
# Create a few objects in db
obj_ids = (22, 25, 30, 31)
for id_ in obj_ids:
db.execute('INSERT INTO objects (id, refcount, size) VALUES(?, ?, ?)',
(id_, 1, 27 * id_))
# Object one will be missing in backend
# Object two will have a checksum error in the data
key = 's3ql_data_%d' % obj_ids[1]
backend[key] = b'some data that will be broken on a data check'
(raw, meta) = plain_backend.fetch(key)
raw = bytearray(raw)
assert len(raw) > 20
raw[-10:-6] = b'forg'
plain_backend.store(key, raw, meta)
# Object three will have a checksum error in the metadata
key = 's3ql_data_%d' % obj_ids[2]
backend.store(key, b'some data that will be broken on a metadata check',
{ 'meta-key1': 'some textual data that just increases',
'meta-key2': 'the metadata size so that we can tamper with it' })
meta = plain_backend.lookup(key)
raw = bytearray(meta['data'])
assert len(raw) > 20
raw[-10:-6] = b'forg'
meta['data'] = raw
plain_backend.update_meta(key, meta)
# Object four will be ok
backend['s3ql_data_%d' % obj_ids[3]] = b'some data that is well'
# When using a single thread, we can fake the backend factory
def backend_factory():
return backend
missing_fh = io.StringIO()
corrupted_fh = io.StringIO()
with catch_logmsg('^Backend seems to have lost', count=1, level=logging.WARNING), \
catch_logmsg('^Object %d is corrupted', count=1, level=logging.WARNING):
verify.retrieve_objects(db, backend_factory, corrupted_fh, missing_fh,
thread_count=1, full=False)
assert missing_fh.getvalue() == 's3ql_data_%d\n' % obj_ids[0]
assert corrupted_fh.getvalue() == 's3ql_data_%d\n' % obj_ids[2]
missing_fh = io.StringIO()
corrupted_fh = io.StringIO()
with catch_logmsg('^Backend seems to have lost', count=1, level=logging.WARNING), \
catch_logmsg('^Object %d is corrupted', count=2, level=logging.WARNING):
verify.retrieve_objects(db, backend_factory, corrupted_fh, missing_fh,
thread_count=1, full=True)
assert missing_fh.getvalue() == 's3ql_data_%d\n' % obj_ids[0]
assert corrupted_fh.getvalue() == ('s3ql_data_%d\n'*2) % obj_ids[1:3]
def backend():
backend_dir = tempfile.mkdtemp(prefix='s3ql-backend-')
plain_backend = local.Backend(
Namespace(storage_url='local://' + backend_dir))
backend = ComprencBackend(b'schnorz', ('zlib', 6), plain_backend)
try:
yield backend
finally:
backend.close()
shutil.rmtree(backend_dir)
def backend(request):
(backend_info, comprenc_kind) = request.param
if backend_info.classname == 'local':
gen = yield_local_backend(backend_info)
elif 'request_handler' in backend_info:
gen = yield_mock_backend(backend_info)
else:
gen = yield_remote_backend(backend_info)
for raw_backend in gen:
if comprenc_kind == 'raw':
backend = raw_backend
elif comprenc_kind == 'plain':
backend = ComprencBackend(None, (None, 6), raw_backend)
elif comprenc_kind == 'aes+zlib':
backend = ComprencBackend(b'schlurz', ('zlib', 6), raw_backend)
elif comprenc_kind == 'aes':
backend = ComprencBackend(b'schlurz', (None, 6), raw_backend)
else:
backend = ComprencBackend(None, (comprenc_kind, 6), raw_backend)
backend.unittest_info = raw_backend.unittest_info
yield backend
def test_passphrase(self):
self.mkfs()
passphrase_new = 'sd982jhd'
proc = subprocess.Popen(self.s3ql_cmd_argv('s3qladm') +
[ '--quiet', '--fatal-warnings', '--log', 'none', '--authfile',
'/dev/null', 'passphrase', self.storage_url ],
stdin=subprocess.PIPE, universal_newlines=True)
print(self.passphrase, file=proc.stdin)
print(passphrase_new, file=proc.stdin)
print(passphrase_new, file=proc.stdin)
proc.stdin.close()
self.assertEqual(proc.wait(), 0)
plain_backend = local.Backend(self.storage_url, None, None)
backend = ComprencBackend(passphrase_new.encode(), ('zlib', 6), plain_backend)
backend.fetch('s3ql_passphrase') # will fail with wrong pw
def test_key_recovery(self):
mkfs_output = self.mkfs()
hit = re.search(r'^---BEGIN MASTER KEY---\n'
r'(.+)\n'
r'---END MASTER KEY---$', mkfs_output, re.MULTILINE)
assert hit
master_key = hit.group(1)
plain_backend = local.Backend(Namespace(
storage_url=self.storage_url))
del plain_backend['s3ql_passphrase'] # Oops
backend = ComprencBackend(self.passphrase.encode(), ('zlib', 6), plain_backend)
with pytest.raises(CorruptedObjectError):
backend.fetch('s3ql_metadata')
passphrase_new = 'sd982jhd'
proc = subprocess.Popen(self.s3ql_cmd_argv('s3qladm') +
[ '--quiet', '--log', 'none', '--authfile',
'/dev/null', 'recover-key', self.storage_url ],
stdin=subprocess.PIPE, universal_newlines=True)
print(master_key, file=proc.stdin)
print(passphrase_new, file=proc.stdin)
print(passphrase_new, file=proc.stdin)
proc.stdin.close()
self.assertEqual(proc.wait(), 0)
backend = ComprencBackend(passphrase_new.encode(), ('zlib', 6), plain_backend)
backend.fetch('s3ql_passphrase') # will fail with wrong pw
def ctx():
ctx = Namespace()
ctx.backend_dir = tempfile.mkdtemp(prefix='s3ql-backend-')
plain_backend = local.Backend(Namespace(
storage_url='local://' + ctx.backend_dir))
ctx.backend_pool = BackendPool(lambda: ComprencBackend(b'schwubl', ('zlib', 6),
plain_backend))
ctx.backend = ctx.backend_pool.pop_conn()
ctx.cachedir = tempfile.mkdtemp(prefix='s3ql-cache-')
ctx.max_obj_size = 1024
# Destructors are not guaranteed to run, and we can't unlink
# the file immediately because apsw refers to it by name.
# Therefore, we unlink the file manually in tearDown()
ctx.dbfile = tempfile.NamedTemporaryFile(delete=False)
ctx.db = Connection(ctx.dbfile.name)
create_tables(ctx.db)
init_tables(ctx.db)
# Tested methods assume that they are called from
# file system request handler
llfuse.lock.acquire()
cache = BlockCache(ctx.backend_pool, ctx.db, ctx.cachedir + "/cache",
ctx.max_obj_size * 5)
ctx.block_cache = cache
ctx.server = fs.Operations(cache, ctx.db, ctx.max_obj_size,
InodeCache(ctx.db, 0))
ctx.server.init()
# Monkeypatch around the need for removal and upload threads
cache.to_remove = DummyQueue(cache)
class DummyDistributor:
def put(ctx, arg, timeout=None):
cache._do_upload(*arg)
return True
cache.to_upload = DummyDistributor()
# Keep track of unused filenames
ctx.name_cnt = 0
yield ctx
ctx.server.inodes.destroy()
llfuse.lock.release()
ctx.block_cache.destroy()
shutil.rmtree(ctx.cachedir)
shutil.rmtree(ctx.backend_dir)
os.unlink(ctx.dbfile.name)
ctx.dbfile.close()
async def ctx():
ctx = Namespace()
ctx.backend_dir = tempfile.mkdtemp(prefix='s3ql-backend-')
plain_backend = local.Backend(
Namespace(storage_url='local://' + ctx.backend_dir))
ctx.backend_pool = BackendPool(
lambda: ComprencBackend(b'schwubl', ('zlib', 6), plain_backend))
ctx.backend = ctx.backend_pool.pop_conn()
ctx.cachedir = tempfile.mkdtemp(prefix='s3ql-cache-')
ctx.max_obj_size = 1024
# Destructors are not guaranteed to run, and we can't unlink
# the file immediately because apsw refers to it by name.
# Therefore, we unlink the file manually in tearDown()
ctx.dbfile = tempfile.NamedTemporaryFile(delete=False)
ctx.db = Connection(ctx.dbfile.name)
create_tables(ctx.db)
init_tables(ctx.db)
cache = BlockCache(ctx.backend_pool, ctx.db, ctx.cachedir + "/cache",
ctx.max_obj_size * 5)
cache.portal = trio.BlockingTrioPortal()
ctx.cache = cache
ctx.server = fs.Operations(cache, ctx.db, ctx.max_obj_size,
InodeCache(ctx.db, 0))
ctx.server.init()
# Monkeypatch around the need for removal and upload threads
cache.to_remove = DummyQueue(cache)
class DummyChannel:
async def send(self, arg):
await trio.run_sync_in_worker_thread(cache._do_upload, *arg)
cache.to_upload = (DummyChannel(), None)
# Keep track of unused filenames
ctx.name_cnt = 0
yield ctx
ctx.server.inodes.destroy()
await ctx.cache.destroy()
shutil.rmtree(ctx.cachedir)
shutil.rmtree(ctx.backend_dir)
os.unlink(ctx.dbfile.name)
ctx.dbfile.close()
def setUp(self):
self.backend_dir = tempfile.mkdtemp(prefix='s3ql-backend-')
plain_backend = local.Backend('local://' + self.backend_dir, None,
None)
self.backend_pool = BackendPool(
lambda: ComprencBackend(b'schwubl', ('zlib', 6), plain_backend))
self.backend = self.backend_pool.pop_conn()
self.cachedir = tempfile.mkdtemp(prefix='s3ql-cache-')
self.max_obj_size = 1024
# Destructors are not guaranteed to run, and we can't unlink
# the file immediately because apsw refers to it by name.
# Therefore, we unlink the file manually in tearDown()
self.dbfile = tempfile.NamedTemporaryFile(delete=False)
self.db = Connection(self.dbfile.name)
create_tables(self.db)
init_tables(self.db)
# Tested methods assume that they are called from
# file system request handler
llfuse.lock.acquire()
cache = BlockCache(self.backend_pool, self.db,
self.cachedir + "/cache", self.max_obj_size * 5)
self.block_cache = cache
self.server = fs.Operations(cache, self.db, self.max_obj_size,
InodeCache(self.db, 0))
self.server.init()
# Monkeypatch around the need for removal and upload threads
cache.to_remove = DummyQueue(cache)
class DummyDistributor:
def put(self, arg, timeout=None):
cache._do_upload(*arg)
return True
cache.to_upload = DummyDistributor()
# Keep track of unused filenames
self.name_cnt = 0
def test_key_recovery(self):
mkfs_output = self.mkfs()
hit = re.search(
r'^---BEGIN MASTER KEY---\n'
r'(.+)\n'
r'---END MASTER KEY---$', mkfs_output, re.MULTILINE)
assert hit
master_key = hit.group(1)
plain_backend = local.Backend(Namespace(storage_url=self.storage_url))
del plain_backend['s3ql_passphrase'] # Oops
backend = ComprencBackend(self.passphrase.encode(), ('zlib', 6),
plain_backend)
with pytest.raises(CorruptedObjectError):
backend.fetch('s3ql_metadata')
passphrase_new = 'sd982jhd'
proc = subprocess.Popen(self.s3ql_cmd_argv('s3qladm') + [
'--quiet', '--log', 'none', '--authfile', '/dev/null',
'recover-key', self.storage_url
],
stdin=subprocess.PIPE,
universal_newlines=True)
print(master_key, file=proc.stdin)
print(passphrase_new, file=proc.stdin)
print(passphrase_new, file=proc.stdin)
proc.stdin.close()
self.assertEqual(proc.wait(), 0)
backend = ComprencBackend(passphrase_new.encode(), ('zlib', 6),
plain_backend)
backend.fetch('s3ql_passphrase') # will fail with wrong pw
def main(args=None):
if args is None:
args = sys.argv[1:]
options = parse_args(args)
setup_logging(options)
# /dev/urandom may be slow, so we cache the data first
log.info('Preparing test data...')
rnd_fh = tempfile.TemporaryFile()
with open('/dev/urandom', 'rb', 0) as src:
copied = 0
while copied < 50 * 1024 * 1024:
buf = src.read(BUFSIZE)
rnd_fh.write(buf)
copied += len(buf)
log.info('Measuring throughput to cache...')
backend_dir = tempfile.mkdtemp(prefix='s3ql-benchmark-')
mnt_dir = tempfile.mkdtemp(prefix='s3ql-mnt')
atexit.register(shutil.rmtree, backend_dir)
atexit.register(shutil.rmtree, mnt_dir)
block_sizes = [ 2**b for b in range(12, 18) ]
for blocksize in block_sizes:
write_time = 0
size = 50 * 1024 * 1024
while write_time < 3:
log.debug('Write took %.3g seconds, retrying', write_time)
subprocess.check_call([exec_prefix + 'mkfs.s3ql', '--plain', 'local://%s' % backend_dir,
'--quiet', '--force', '--cachedir', options.cachedir])
subprocess.check_call([exec_prefix + 'mount.s3ql', '--threads', '1', '--quiet',
'--cachesize', '%d' % (2 * size / 1024), '--log',
'%s/mount.log' % backend_dir, '--cachedir', options.cachedir,
'local://%s' % backend_dir, mnt_dir])
try:
size *= 2
with open('%s/bigfile' % mnt_dir, 'wb', 0) as dst:
rnd_fh.seek(0)
write_time = time.time()
copied = 0
while copied < size:
buf = rnd_fh.read(blocksize)
if not buf:
rnd_fh.seek(0)
continue
dst.write(buf)
copied += len(buf)
write_time = time.time() - write_time
os.unlink('%s/bigfile' % mnt_dir)
finally:
subprocess.check_call([exec_prefix + 'umount.s3ql', mnt_dir])
fuse_speed = copied / write_time
log.info('Cache throughput with %3d KiB blocks: %d KiB/sec',
blocksize / 1024, fuse_speed / 1024)
# Upload random data to prevent effects of compression
# on the network layer
log.info('Measuring raw backend throughput..')
try:
backend = get_backend(options, raw=True)
except DanglingStorageURLError as exc:
raise QuietError(str(exc)) from None
upload_time = 0
size = 512 * 1024
while upload_time < 10:
size *= 2
def do_write(dst):
rnd_fh.seek(0)
stamp = time.time()
copied = 0
while copied < size:
buf = rnd_fh.read(BUFSIZE)
if not buf:
rnd_fh.seek(0)
continue
dst.write(buf)
copied += len(buf)
return (copied, stamp)
(upload_size, upload_time) = backend.perform_write(do_write, 's3ql_testdata')
upload_time = time.time() - upload_time
backend_speed = upload_size / upload_time
log.info('Backend throughput: %d KiB/sec', backend_speed / 1024)
backend.delete('s3ql_testdata')
src = options.file
size = os.fstat(options.file.fileno()).st_size
log.info('Test file size: %.2f MiB', (size / 1024 ** 2))
in_speed = dict()
out_speed = dict()
for alg in ALGS:
log.info('compressing with %s-6...', alg)
backend = ComprencBackend(b'pass', (alg, 6),Backend(argparse.Namespace(storage_url='local://' + backend_dir)))
def do_write(dst): #pylint: disable=E0102
src.seek(0)
stamp = time.time()
while True:
buf = src.read(BUFSIZE)
if not buf:
break
dst.write(buf)
return (dst, stamp)
(dst_fh, stamp) = backend.perform_write(do_write, 's3ql_testdata')
dt = time.time() - stamp
in_speed[alg] = size / dt
out_speed[alg] = dst_fh.get_obj_size() / dt
log.info('%s compression speed: %d KiB/sec per thread (in)', alg, in_speed[alg] / 1024)
log.info('%s compression speed: %d KiB/sec per thread (out)', alg, out_speed[alg] / 1024)
print('')
print('With %d KiB blocks, maximum performance for different compression'
% (block_sizes[-1]/1024), 'algorithms and thread counts is:', '', sep='\n')
threads = set([1,2,4,8])
cores = os.sysconf('SC_NPROCESSORS_ONLN')
if cores != -1:
threads.add(cores)
if options.threads:
threads.add(options.threads)
print('%-26s' % 'Threads:',
('%12d' * len(threads)) % tuple(sorted(threads)))
for alg in ALGS:
speeds = []
limits = []
for t in sorted(threads):
if fuse_speed > t * in_speed[alg]:
limit = 'CPU'
speed = t * in_speed[alg]
else:
limit = 'S3QL/FUSE'
speed = fuse_speed
if speed / in_speed[alg] * out_speed[alg] > backend_speed:
limit = 'uplink'
speed = backend_speed * in_speed[alg] / out_speed[alg]
limits.append(limit)
speeds.append(speed / 1024)
print('%-26s' % ('Max FS throughput (%s):' % alg),
('%7d KiB/s' * len(threads)) % tuple(speeds))
print('%-26s' % '..limited by:',
('%12s' * len(threads)) % tuple(limits))
print('')
print('All numbers assume that the test file is representative and that',
'there are enough processor cores to run all active threads in parallel.',
'To compensate for network latency, you should use about twice as',
'many upload threads as indicated by the above table.\n', sep='\n')
def main(args=None):
if args is None:
args = sys.argv[1:]
options = parse_args(args)
setup_logging(options)
# /dev/urandom may be slow, so we cache the data first
log.info('Preparing test data...')
rnd_fh = tempfile.TemporaryFile()
with open('/dev/urandom', 'rb', 0) as src:
copied = 0
while copied < 50 * 1024 * 1024:
buf = src.read(BUFSIZE)
rnd_fh.write(buf)
copied += len(buf)
log.info('Measuring throughput to cache...')
backend_dir = tempfile.mkdtemp(prefix='s3ql-benchmark-')
mnt_dir = tempfile.mkdtemp(prefix='s3ql-mnt')
atexit.register(shutil.rmtree, backend_dir)
atexit.register(shutil.rmtree, mnt_dir)
block_sizes = [2**b for b in range(12, 18)]
for blocksize in block_sizes:
write_time = 0
size = 50 * 1024 * 1024
while write_time < 3:
log.debug('Write took %.3g seconds, retrying', write_time)
subprocess.check_call([
exec_prefix + 'mkfs.s3ql', '--plain',
'local://%s' % backend_dir, '--quiet', '--force', '--cachedir',
options.cachedir
])
subprocess.check_call([
exec_prefix + 'mount.s3ql', '--threads', '1', '--quiet',
'--cachesize',
'%d' % (2 * size / 1024), '--log',
'%s/mount.log' % backend_dir, '--cachedir', options.cachedir,
'local://%s' % backend_dir, mnt_dir
])
try:
size *= 2
with open('%s/bigfile' % mnt_dir, 'wb', 0) as dst:
rnd_fh.seek(0)
write_time = time.time()
copied = 0
while copied < size:
buf = rnd_fh.read(blocksize)
if not buf:
rnd_fh.seek(0)
continue
dst.write(buf)
copied += len(buf)
write_time = time.time() - write_time
os.unlink('%s/bigfile' % mnt_dir)
finally:
subprocess.check_call([exec_prefix + 'umount.s3ql', mnt_dir])
fuse_speed = copied / write_time
log.info('Cache throughput with %3d KiB blocks: %d KiB/sec',
blocksize / 1024, fuse_speed / 1024)
# Upload random data to prevent effects of compression
# on the network layer
log.info('Measuring raw backend throughput..')
try:
backend = get_backend(options, raw=True)
except DanglingStorageURLError as exc:
raise QuietError(str(exc)) from None
upload_time = 0
size = 512 * 1024
while upload_time < 10:
size *= 2
def do_write(dst):
rnd_fh.seek(0)
stamp = time.time()
copied = 0
while copied < size:
buf = rnd_fh.read(BUFSIZE)
if not buf:
rnd_fh.seek(0)
continue
dst.write(buf)
copied += len(buf)
return (copied, stamp)
(upload_size,
upload_time) = backend.perform_write(do_write, 's3ql_testdata')
upload_time = time.time() - upload_time
backend_speed = upload_size / upload_time
log.info('Backend throughput: %d KiB/sec', backend_speed / 1024)
backend.delete('s3ql_testdata')
src = options.file
size = os.fstat(options.file.fileno()).st_size
log.info('Test file size: %.2f MiB', (size / 1024**2))
in_speed = dict()
out_speed = dict()
for alg in ALGS:
log.info('compressing with %s-6...', alg)
backend = ComprencBackend(
b'pass', (alg, 6),
Backend(argparse.Namespace(storage_url='local://' + backend_dir)))
def do_write(dst): #pylint: disable=E0102
src.seek(0)
stamp = time.time()
while True:
buf = src.read(BUFSIZE)
if not buf:
break
dst.write(buf)
return (dst, stamp)
(dst_fh, stamp) = backend.perform_write(do_write, 's3ql_testdata')
dt = time.time() - stamp
in_speed[alg] = size / dt
out_speed[alg] = dst_fh.get_obj_size() / dt
log.info('%s compression speed: %d KiB/sec per thread (in)', alg,
in_speed[alg] / 1024)
log.info('%s compression speed: %d KiB/sec per thread (out)', alg,
out_speed[alg] / 1024)
print('')
print('With %d KiB blocks, maximum performance for different compression' %
(block_sizes[-1] / 1024),
'algorithms and thread counts is:',
'',
sep='\n')
threads = set([1, 2, 4, 8])
cores = os.sysconf('SC_NPROCESSORS_ONLN')
if cores != -1:
threads.add(cores)
if options.threads:
threads.add(options.threads)
print('%-26s' % 'Threads:',
('%12d' * len(threads)) % tuple(sorted(threads)))
for alg in ALGS:
speeds = []
limits = []
for t in sorted(threads):
if fuse_speed > t * in_speed[alg]:
limit = 'CPU'
speed = t * in_speed[alg]
else:
limit = 'S3QL/FUSE'
speed = fuse_speed
if speed / in_speed[alg] * out_speed[alg] > backend_speed:
limit = 'uplink'
speed = backend_speed * in_speed[alg] / out_speed[alg]
limits.append(limit)
speeds.append(speed / 1024)
print('%-26s' % ('Max FS throughput (%s):' % alg),
('%7d KiB/s' * len(threads)) % tuple(speeds))
print('%-26s' % '..limited by:',
('%12s' * len(threads)) % tuple(limits))
print('')
print(
'All numbers assume that the test file is representative and that',
'there are enough processor cores to run all active threads in parallel.',
'To compensate for network latency, you should use about twice as',
'many upload threads as indicated by the above table.\n',
sep='\n')
