mirror of
https://github.com/ceph/ceph
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222 lines
7.5 KiB
Python
222 lines
7.5 KiB
Python
"""
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Rados benchmarking sweep
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"""
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import contextlib
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import logging
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import re
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from cStringIO import StringIO
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from itertools import product
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from teuthology.orchestra import run
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from teuthology import misc as teuthology
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log = logging.getLogger(__name__)
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@contextlib.contextmanager
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def task(ctx, config):
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"""
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Execute a radosbench parameter sweep
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Puts radosbench in a loop, taking values from the given config at each
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iteration. If given, the min and max values below create a range, e.g.
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min_replicas=1 and max_replicas=3 implies executing with 1-3 replicas.
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Parameters:
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clients: [client list]
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time: seconds to run (default=120)
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sizes: [list of object sizes] (default=[4M])
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mode: <write|read|seq> (default=write)
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repetitions: execute the same configuration multiple times (default=1)
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min_num_replicas: minimum number of replicas to use (default = 3)
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max_num_replicas: maximum number of replicas to use (default = 3)
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min_num_osds: the minimum number of OSDs in a pool (default=all)
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max_num_osds: the maximum number of OSDs in a pool (default=all)
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file: name of CSV-formatted output file (default='radosbench.csv')
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columns: columns to include (default=all)
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- rep: execution number (takes values from 'repetitions')
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- num_osd: number of osds for pool
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- num_replica: number of replicas
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- avg_throughput: throughput
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- avg_latency: latency
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- stdev_throughput:
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- stdev_latency:
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Example:
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- radsobenchsweep:
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columns: [rep, num_osd, num_replica, avg_throughput, stdev_throughput]
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"""
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log.info('Beginning radosbenchsweep...')
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assert isinstance(config, dict), 'expecting dictionary for configuration'
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# get and validate config values
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# {
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# only one client supported for now
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if len(config.get('clients', [])) != 1:
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raise Exception("Only one client can be specified")
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# only write mode
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if config.get('mode', 'write') != 'write':
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raise Exception("Only 'write' mode supported for now.")
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# OSDs
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total_osds_in_cluster = teuthology.num_instances_of_type(ctx.cluster, 'osd')
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min_num_osds = config.get('min_num_osds', total_osds_in_cluster)
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max_num_osds = config.get('max_num_osds', total_osds_in_cluster)
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if max_num_osds > total_osds_in_cluster:
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raise Exception('max_num_osds cannot be greater than total in cluster')
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if min_num_osds < 1:
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raise Exception('min_num_osds cannot be less than 1')
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if min_num_osds > max_num_osds:
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raise Exception('min_num_osds cannot be greater than max_num_osd')
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osds = range(0, (total_osds_in_cluster + 1))
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# replicas
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min_num_replicas = config.get('min_num_replicas', 3)
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max_num_replicas = config.get('max_num_replicas', 3)
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if min_num_replicas < 1:
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raise Exception('min_num_replicas cannot be less than 1')
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if min_num_replicas > max_num_replicas:
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raise Exception('min_num_replicas cannot be greater than max_replicas')
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if max_num_replicas > max_num_osds:
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raise Exception('max_num_replicas cannot be greater than max_num_osds')
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replicas = range(min_num_replicas, (max_num_replicas + 1))
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# object size
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sizes = config.get('size', [4 << 20])
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# repetitions
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reps = range(config.get('repetitions', 1))
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# file
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fname = config.get('file', 'radosbench.csv')
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f = open('{}/{}'.format(ctx.archive, fname), 'w')
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f.write(get_csv_header(config) + '\n')
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# }
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# set default pools size=1 to avoid 'unhealthy' issues
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ctx.manager.set_pool_property('data', 'size', 1)
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ctx.manager.set_pool_property('metadata', 'size', 1)
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ctx.manager.set_pool_property('rbd', 'size', 1)
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current_osds_out = 0
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# sweep through all parameters
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for osds_out, size, replica, rep in product(osds, sizes, replicas, reps):
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osds_in = total_osds_in_cluster - osds_out
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if osds_in == 0:
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# we're done
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break
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if current_osds_out != osds_out:
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# take an osd out
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ctx.manager.raw_cluster_cmd(
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'osd', 'reweight', str(osds_out-1), '0.0')
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wait_until_healthy(ctx, config)
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current_osds_out = osds_out
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if osds_in not in range(min_num_osds, (max_num_osds + 1)):
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# no need to execute with a number of osds that wasn't requested
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continue
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if osds_in < replica:
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# cannot execute with more replicas than available osds
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continue
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run_radosbench(ctx, config, f, osds_in, size, replica, rep)
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f.close()
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yield
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def get_csv_header(conf):
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all_columns = [
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'rep', 'num_osd', 'num_replica', 'avg_throughput',
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'avg_latency', 'stdev_throughput', 'stdev_latency'
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]
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given_columns = conf.get('columns', None)
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if given_columns and len(given_columns) != 0:
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for column in given_columns:
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if column not in all_columns:
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raise Exception('Unknown column ' + column)
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return ','.join(conf['columns'])
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else:
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conf['columns'] = all_columns
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return ','.join(all_columns)
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def run_radosbench(ctx, config, f, num_osds, size, replica, rep):
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pool = ctx.manager.create_pool_with_unique_name()
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ctx.manager.set_pool_property(pool, 'size', replica)
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wait_until_healthy(ctx, config)
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log.info('Executing with parameters: ')
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log.info(' num_osd =' + str(num_osds))
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log.info(' size =' + str(size))
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log.info(' num_replicas =' + str(replica))
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log.info(' repetition =' + str(rep))
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for role in config.get('clients', ['client.0']):
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assert isinstance(role, basestring)
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PREFIX = 'client.'
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assert role.startswith(PREFIX)
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id_ = role[len(PREFIX):]
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(remote,) = ctx.cluster.only(role).remotes.iterkeys()
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proc = remote.run(
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args=[
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'adjust-ulimits',
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'ceph-coverage',
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'{}/archive/coverage'.format(teuthology.get_testdir(ctx)),
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'rados',
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'--no-log-to-stderr',
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'--name', role,
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'-b', str(size),
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'-p', pool,
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'bench', str(config.get('time', 120)), 'write',
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],
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logger=log.getChild('radosbench.{id}'.format(id=id_)),
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stdin=run.PIPE,
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stdout=StringIO(),
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wait=False
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)
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# parse output to get summary and format it as CSV
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proc.wait()
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out = proc.stdout.getvalue()
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all_values = {
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'stdev_throughput': re.sub(r'Stddev Bandwidth: ', '', re.search(
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r'Stddev Bandwidth:.*', out).group(0)),
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'stdev_latency': re.sub(r'Stddev Latency: ', '', re.search(
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r'Stddev Latency:.*', out).group(0)),
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'avg_throughput': re.sub(r'Bandwidth \(MB/sec\): ', '', re.search(
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r'Bandwidth \(MB/sec\):.*', out).group(0)),
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'avg_latency': re.sub(r'Average Latency: ', '', re.search(
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r'Average Latency:.*', out).group(0)),
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'rep': str(rep),
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'num_osd': str(num_osds),
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'num_replica': str(replica)
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}
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values_to_write = []
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for column in config['columns']:
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values_to_write.extend([all_values[column]])
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f.write(','.join(values_to_write) + '\n')
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ctx.manager.remove_pool(pool)
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def wait_until_healthy(ctx, config):
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first_mon = teuthology.get_first_mon(ctx, config)
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(mon_remote,) = ctx.cluster.only(first_mon).remotes.iterkeys()
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teuthology.wait_until_healthy(ctx, mon_remote)
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