def recover(num_servers,
backups_per_server,
num_partitions,
object_size,
num_objects,
num_overwrites,
replicas,
coordinator_args='',
master_args='',
backup_args='',
master_ram=None,
old_master_ram=None,
num_removals=0,
timeout=100,
log_level='NOTICE',
log_dir='logs',
transport='infrc',
verbose=False,
debug=False):
"""Run a recovery on the cluster specified in the config module and
return statisitics about the recovery.
See the config module for more parameters that affect how the recovery
will be run. In particular config.hosts and config.old_master_host which
select which hosts in the cluster recovery will be run on.
@param num_servers: Number of hosts on which to run Masters.
@type num_servers: C{int}
@param backups_per_server: Number of Backups to colocate on the same host
with each Master. If this is 1 the Backup is
run in the same process as the Master. If this
is 2 then an additional process is started to
run the second Backup.
@type backups_per_server: C{int}
@param num_partitions: Number of partitions to create on the old Master
before it is crashed. This also determines how many
Recovery Masters will participate in recovery.
@type num_partitions: C{int}
@param object_size: Size of objects to fill old Master with before crash.
@type object_size: C{int}
@param num_objects: Number of objects to fill old Master with before crash.
@type num_objects: C{int}
@param num_overwrites: Number of writes on same key while filling old Master.
@type num_overwrites: C{int}
@param replicas: Number of times each segment is replicated to different
backups in the cluster.
@type replicas: C{int}
@param coordinator_args: Additional command-line arguments to pass to
the coordinator.
@type coordinator_args: C{str}
@param master_args: Additional command-line arguments to pass to
each server that acts as a master.
@type master_args: C{str}
@param backup_args: Additional command-line arguments to pass to
each server that acts as a backup.
@type backup_args: C{str}
@param master_ram: Megabytes of space allocated in each of the Masters
(except the old Master, see old_master_ram). If left
unspecified same sane default will be attempted based
on num_objects, object_size and num_overwrites.
@type master_ram: C{int}
@param old_master_ram: Megabytes of space allocated in the old Master that
will eventually be crashed. If left unspecified same
sane default will be attempted based on num_objects,
num_overwrites and object_size.
@type old_master_ram: C{int}
@param num_removals: Number of erases to do after inserts. Allows
recoveries where some of the log contains tombstones.
@type num_removals: C{int}
@param timeout: Seconds to wait before giving up and declaring the recovery
to have failed.
@type timeout: C{int}
@param log_level: Log level to use for all servers.
DEBUG, NOTICE, WARNING, or ERROR.
@type log_level: C{str}
@param log_dir: Top-level directory in which to write log files.
A separate subdirectory will be created in this
directory for the log files from this run.
@type log_dir: C{str}
@param transport: A transport name (e.g. infrc, fast+udp, tcp, ...)
@type transport: C{str}
@param verbose: Print information about progress in starting clients
and servers.
@type verbose: C{bool}
@param debug: If True, pause after starting all to allow for debugging
setup such as attaching gdb.
@type debug: C{bool}
@return: A recoverymetrics stats struct (see recoverymetrics.parseRecovery).
"""
server_binary = '%s/server' % obj_path
client_binary = '%s/recovery' % obj_path
ensure_servers_bin = '%s/ensureServers' % obj_path
args = {}
args['num_servers'] = num_servers
args['backups_per_server'] = backups_per_server
args['replicas'] = replicas
args['timeout'] = timeout
args['log_level'] = log_level
args['log_dir'] = log_dir
args['transport'] = transport
args['verbose'] = verbose
args['debug'] = debug
args['coordinator_host'] = config.old_master_host
args['coordinator_args'] = coordinator_args
args['backup_args'] = backup_args
# Just a guess of about how much capacity a master will have to have
# to hold all the data from all the partitions
if master_ram:
log_space_per_partition = master_ram
else:
log_space_per_partition = (
200 + (1.3 * num_objects / object_size * num_overwrites))
# Extra segments are needed because the dummy tablets placed on the
# masters cause log head rollovers. Without compensating for the
# space waster by that the recovery masters run out of space.
args['master_args'] = '-d -D -t %d' % (log_space_per_partition +
8 * num_partitions)
if master_args:
args['master_args'] += ' ' + master_args
args['client'] = ('%s -f -n %d -r %d -s %d '
'-t %d -k %d -l %s -o %d' %
(client_binary, num_objects, num_removals, object_size,
num_partitions, num_servers, log_level, num_overwrites))
args['old_master_host'] = config.old_master_host
args['client_hosts'] = [config.old_master_host]
if old_master_ram:
args['old_master_args'] = '-d -t %d' % old_master_ram
else:
old_master_ram = log_space_per_partition * num_partitions * num_overwrites
if args['coordinator_host'][0] == 'rcmaster' and old_master_ram > 42000:
print('Warning: pushing the limits of rcmaster; '
'limiting RAM to 42000 MB to avoid knocking it over; '
'use rcmonster if you need more')
old_master_ram = 42000
args['old_master_args'] = '-d -D -t %d' % old_master_ram
recovery_logs = cluster.run(**args)
# Collect metrics information.
stats = {}
stats['metrics'] = recoverymetrics.parseRecovery(recovery_logs)
report = recoverymetrics.makeReport(stats['metrics']).jsonable()
f = open('%s/metrics' % recovery_logs, 'w')
getDumpstr().print_report(report, file=f)
f.close()
stats['run'] = recovery_logs
stats['count'] = num_objects
stats['size'] = object_size
stats['ns'] = stats['metrics'].client.recoveryNs
stats['report'] = report
return stats
def recover(num_servers,
backup_disks_per_server,
object_size,
num_objects,
num_overwrites,
replicas,
coordinator_args='',
master_args='',
backup_args='',
master_ram=None,
old_master_ram=None,
num_removals=0,
timeout=100,
log_level='NOTICE',
log_dir='logs',
transport='basic+infud',
verbose=False,
debug=False):
"""Run a recovery on the cluster specified in the config module and
return statisitics about the recovery.
See the config module for more parameters that affect how the recovery
will be run. In particular config.hosts and config.old_master_host which
select which hosts in the cluster recovery will be run on.
@param num_servers: Number of hosts on which to run Masters.
@type num_servers: C{int}
@param backup_disks_per_server: Number of backup disks to use on each
Master. All disks are shared by one Backup
(in the same process as the Master).
@type backup_disks_per_server: C{int}
@param object_size: Size of objects to fill old Master with before crash.
@type object_size: C{int}
@param num_objects: Number of objects to fill old Master with before crash.
@type num_objects: C{int}
@param num_overwrites: Number of writes on same key while filling old Master.
@type num_overwrites: C{int}
@param replicas: Number of times each segment is replicated to different
backups in the cluster.
@type replicas: C{int}
@param coordinator_args: Additional command-line arguments to pass to
the coordinator.
@type coordinator_args: C{str}
@param master_args: Additional command-line arguments to pass to
each server that acts as a master.
@type master_args: C{str}
@param backup_args: Additional command-line arguments to pass to
each server that acts as a backup.
@type backup_args: C{str}
@param master_ram: Megabytes of space allocated in each of the Masters
(except the old Master, see old_master_ram). If left
unspecified same sane default will be attempted based
on num_objects, object_size and num_overwrites.
@type master_ram: C{int}
@param old_master_ram: Megabytes of space allocated in the old Master that
will eventually be crashed. If left unspecified same
sane default will be attempted based on num_objects,
num_overwrites and object_size.
@type old_master_ram: C{int}
@param num_removals: Number of erases to do after inserts. Allows
recoveries where some of the log contains tombstones.
@type num_removals: C{int}
@param timeout: Seconds to wait before giving up and declaring the recovery
to have failed.
@type timeout: C{int}
@param log_level: Log level to use for all servers.
DEBUG, NOTICE, WARNING, or ERROR.
@type log_level: C{str}
@param log_dir: Top-level directory in which to write log files.
A separate subdirectory will be created in this
directory for the log files from this run.
@type log_dir: C{str}
@param transport: A transport name (e.g. infrc, basic+udp, tcp, ...)
@type transport: C{str}
@param verbose: Print information about progress in starting clients
and servers.
@type verbose: C{bool}
@param debug: If True, pause after starting all to allow for debugging
setup such as attaching gdb.
@type debug: C{bool}
@return: A recoverymetrics stats struct (see recoverymetrics.parseRecovery).
"""
server_binary = '%s/server' % obj_path
client_binary = '%s/recovery' % obj_path
ensure_servers_bin = '%s/ensureServers' % obj_path
args = {}
args['num_servers'] = num_servers
args['backup_disks_per_server'] = backup_disks_per_server
args['replicas'] = replicas
args['timeout'] = timeout
args['log_level'] = log_level
args['log_dir'] = log_dir
args['transport'] = transport
args['verbose'] = verbose
args['debug'] = debug
args['coordinator_host'] = getOldMasterHost()
args['coordinator_args'] = coordinator_args
if backup_args:
args['backup_args'] += backup_args;
else:
args['backup_args'] = '--maxNonVolatileBuffers 1000'
# Allocate enough memory on recovery masters to handle several
# recovery partitions (most recoveries will only have one recovery
# partition per master, which is about 500 MB).
args['master_args'] = '-d -D -t 5000'
if master_args:
args['master_args'] += ' ' + master_args;
args['client'] = ('%s -f -n %d -r %d -s %d '
'-k %d -l %s -o %d' % (client_binary,
num_objects, num_removals, object_size,
num_servers, log_level, num_overwrites))
args['old_master_host'] = getOldMasterHost()
args['client_hosts'] = [getOldMasterHost()]
if old_master_ram:
args['old_master_args'] = '-d -t %d' % old_master_ram
else:
# Estimate how much log space the old master will need to hold
# all of the data.
old_master_ram = (200 + (1.3 * num_objects / object_size * num_overwrites))
if args['coordinator_host'][0] == 'rcmaster' and old_master_ram > 42000:
print('Warning: pushing the limits of rcmaster; '
'limiting RAM to 42000 MB to avoid knocking it over; '
'use rcmonster if you need more')
old_master_ram = 42000
args['old_master_args'] = '-d -D -t %d' % old_master_ram
recovery_logs = cluster.run(**args)
# Collect metrics information.
stats = {}
stats['metrics'] = recoverymetrics.parseRecovery(recovery_logs)
report = recoverymetrics.makeReport(stats['metrics']).jsonable()
f = open('%s/metrics' % recovery_logs, 'w')
getDumpstr().print_report(report, file=f)
f.close()
stats['run'] = recovery_logs
stats['count'] = num_objects
stats['size'] = object_size
stats['ns'] = stats['metrics'].client.recoveryNs
stats['report'] = report
return stats
def recover(
num_servers,
backups_per_server,
num_partitions,
object_size,
num_objects,
replicas,
coordinator_args="",
master_args="",
backup_args="",
master_ram=None,
old_master_ram=None,
num_removals=0,
timeout=60,
log_level="NOTICE",
log_dir="logs",
transport="infrc",
verbose=False,
debug=False,
):
"""Run a recovery on the cluster specified in the config module and
return statisitics about the recovery.
See the config module for more parameters that affect how the recovery
will be run. In particular config.hosts and config.old_master_host which
select which hosts in the cluster recovery will be run on.
@param num_servers: Number of hosts on which to run Masters.
@type num_servers: C{int}
@param backups_per_server: Number of Backups to colocate on the same host
with each Master. If this is 1 the Backup is
run in the same process as the Master. If this
is 2 then an additional process is started to
run the second Backup.
@type backups_per_server: C{int}
@param num_partitions: Number of partitions to create on the old Master
before it is crashed. This also determines how many
Recovery Masters will participate in recovery.
@type num_partitions: C{int}
@param object_size: Size of objects to fill old Master with before crash.
@type object_size: C{int}
@param num_objects: Number of objects to fill old Master with before crash.
@type num_objects: C{int}
@param replicas: Number of times each segment is replicated to different
backups in the cluster.
@type replicas: C{int}
@param coordinator_args: Additional command-line arguments to pass to
the coordinator.
@type coordinator_args: C{str}
@param master_args: Additional command-line arguments to pass to
each server that acts as a master.
@type master_args: C{str}
@param backup_args: Additional command-line arguments to pass to
each server that acts as a backup.
@type backup_args: C{str}
@param master_ram: Megabytes of space allocated in each of the Masters
(except the old Master, see old_master_ram). If left
unspecified same sane default will be attempted based
on num_objects and object_size.
@type master_ram: C{int}
@param old_master_ram: Megabytes of space allocated in the old Master that
will eventually be crashed. If left unspecified same
sane default will be attempted based on num_objects
and object_size.
@type old_master_ram: C{int}
@param num_removals: Number of erases to do after inserts. Allows
recoveries where some of the log contains tombstones.
@type num_removals: C{int}
@param timeout: Seconds to wait before giving up and declaring the recovery
to have failed.
@type timeout: C{int}
@param log_level: Log level to use for all servers.
DEBUG, NOTICE, WARNING, or ERROR.
@type log_level: C{str}
@param log_dir: Top-level directory in which to write log files.
A separate subdirectory will be created in this
directory for the log files from this run.
@type log_dir: C{str}
@param transport: A transport name (e.g. infrc, fast+udp, tcp, ...)
@type transport: C{str}
@param verbose: Print information about progress in starting clients
and servers.
@type verbose: C{bool}
@param debug: If True, pause after starting all to allow for debugging
setup such as attaching gdb.
@type debug: C{bool}
@return: A recoverymetrics stats struct (see recoverymetrics.parseRecovery).
"""
server_binary = "%s/server" % obj_path
client_binary = "%s/recovery" % obj_path
ensure_servers_bin = "%s/ensureServers" % obj_path
args = {}
args["num_servers"] = num_servers
args["backups_per_server"] = backups_per_server
args["replicas"] = replicas
args["timeout"] = timeout
args["log_level"] = log_level
args["log_dir"] = log_dir
args["transport"] = transport
args["verbose"] = verbose
args["debug"] = debug
args["coordinator_args"] = coordinator_args
args["backup_args"] = backup_args
# Just a guess of about how much capacity a master will have to have
# to hold all the data from all the partitions
if master_ram:
log_space_per_partition = master_ram
else:
log_space_per_partition = 200 + (1.3 * num_objects / object_size)
args["master_args"] = "-t %d" % log_space_per_partition
if master_args:
args["master_args"] += " " + master_args
args["client"] = "%s -f -n %d -r %d -s %d " "-t %d -k %d" % (
client_binary,
num_objects,
num_removals,
object_size,
num_partitions,
num_servers,
)
args["old_master_host"] = config.old_master_host
if old_master_ram:
args["old_master_args"] = "-t %d" % old_master_ram
else:
args["old_master_args"] = "-t %d" % (log_space_per_partition * num_partitions)
recovery_logs = cluster.run(**args)
# Collect metrics information.
stats = {}
stats["metrics"] = recoverymetrics.parseRecovery(recovery_logs)
report = recoverymetrics.makeReport(stats["metrics"]).jsonable()
f = open("%s/metrics" % recovery_logs, "w")
getDumpstr().print_report(report, file=f)
f.close()
stats["run"] = recovery_logs
stats["count"] = num_objects
stats["size"] = object_size
stats["ns"] = stats["metrics"].client.recoveryNs
stats["report"] = report
return stats
def recover(num_servers,
backups_per_server,
num_partitions,
object_size,
num_objects,
num_overwrites,
replicas,
coordinator_args='',
master_args='',
backup_args='',
master_ram=None,
old_master_ram=None,
num_removals=0,
timeout=100,
log_level='NOTICE',
log_dir='logs',
transport='infrc',
verbose=False,
debug=False):
"""Run a recovery on the cluster specified in the config module and
return statisitics about the recovery.
See the config module for more parameters that affect how the recovery
will be run. In particular config.hosts and config.old_master_host which
select which hosts in the cluster recovery will be run on.
@param num_servers: Number of hosts on which to run Masters.
@type num_servers: C{int}
@param backups_per_server: Number of Backups to colocate on the same host
with each Master. If this is 1 the Backup is
run in the same process as the Master. If this
is 2 then an additional process is started to
run the second Backup.
@type backups_per_server: C{int}
@param num_partitions: Number of partitions to create on the old Master
before it is crashed. This also determines how many
Recovery Masters will participate in recovery.
@type num_partitions: C{int}
@param object_size: Size of objects to fill old Master with before crash.
@type object_size: C{int}
@param num_objects: Number of objects to fill old Master with before crash.
@type num_objects: C{int}
@param num_overwrites: Number of writes on same key while filling old Master.
@type num_overwrites: C{int}
@param replicas: Number of times each segment is replicated to different
backups in the cluster.
@type replicas: C{int}
@param coordinator_args: Additional command-line arguments to pass to
the coordinator.
@type coordinator_args: C{str}
@param master_args: Additional command-line arguments to pass to
each server that acts as a master.
@type master_args: C{str}
@param backup_args: Additional command-line arguments to pass to
each server that acts as a backup.
@type backup_args: C{str}
@param master_ram: Megabytes of space allocated in each of the Masters
(except the old Master, see old_master_ram). If left
unspecified same sane default will be attempted based
on num_objects, object_size and num_overwrites.
@type master_ram: C{int}
@param old_master_ram: Megabytes of space allocated in the old Master that
will eventually be crashed. If left unspecified same
sane default will be attempted based on num_objects,
num_overwrites and object_size.
@type old_master_ram: C{int}
@param num_removals: Number of erases to do after inserts. Allows
recoveries where some of the log contains tombstones.
@type num_removals: C{int}
@param timeout: Seconds to wait before giving up and declaring the recovery
to have failed.
@type timeout: C{int}
@param log_level: Log level to use for all servers.
DEBUG, NOTICE, WARNING, or ERROR.
@type log_level: C{str}
@param log_dir: Top-level directory in which to write log files.
A separate subdirectory will be created in this
directory for the log files from this run.
@type log_dir: C{str}
@param transport: A transport name (e.g. infrc, fast+udp, tcp, ...)
@type transport: C{str}
@param verbose: Print information about progress in starting clients
and servers.
@type verbose: C{bool}
@param debug: If True, pause after starting all to allow for debugging
setup such as attaching gdb.
@type debug: C{bool}
@return: A recoverymetrics stats struct (see recoverymetrics.parseRecovery).
"""
server_binary = '%s/server' % obj_path
client_binary = '%s/recovery' % obj_path
ensure_servers_bin = '%s/ensureServers' % obj_path
args = {}
args['num_servers'] = num_servers
args['backups_per_server'] = backups_per_server
args['replicas'] = replicas
args['timeout'] = timeout
args['log_level'] = log_level
args['log_dir'] = log_dir
args['transport'] = transport
args['verbose'] = verbose
args['debug'] = debug
args['coordinator_host'] = config.old_master_host
args['coordinator_args'] = coordinator_args
args['backup_args'] = backup_args
# Just a guess of about how much capacity a master will have to have
# to hold all the data from all the partitions
if master_ram:
log_space_per_partition = master_ram
else:
log_space_per_partition = (200 + (1.3 * num_objects / object_size * num_overwrites))
# Extra segments are needed because the dummy tablets placed on the
# masters cause log head rollovers. Without compensating for the
# space waster by that the recovery masters run out of space.
args['master_args'] = '-d -D -t %d' % (log_space_per_partition +
8 * num_partitions)
if master_args:
args['master_args'] += ' ' + master_args;
args['client'] = ('%s -f -n %d -r %d -s %d '
'-t %d -k %d -l %s -o %d' % (client_binary,
num_objects, num_removals, object_size,
num_partitions, num_servers, log_level, num_overwrites))
args['old_master_host'] = config.old_master_host
args['client_hosts'] = [config.old_master_host]
if old_master_ram:
args['old_master_args'] = '-d -t %d' % old_master_ram
else:
old_master_ram = log_space_per_partition * num_partitions * num_overwrites
if args['coordinator_host'][0] == 'rcmaster' and old_master_ram > 42000:
print('Warning: pushing the limits of rcmaster; '
'limiting RAM to 42000 MB to avoid knocking it over; '
'use rcmonster if you need more')
old_master_ram = 42000
args['old_master_args'] = '-d -D -t %d' % old_master_ram
recovery_logs = cluster.run(**args)
# Collect metrics information.
stats = {}
stats['metrics'] = recoverymetrics.parseRecovery(recovery_logs)
report = recoverymetrics.makeReport(stats['metrics']).jsonable()
f = open('%s/metrics' % recovery_logs, 'w')
getDumpstr().print_report(report, file=f)
f.close()
stats['run'] = recovery_logs
stats['count'] = num_objects
stats['size'] = object_size
stats['ns'] = stats['metrics'].client.recoveryNs
stats['report'] = report
return stats
def recover(num_servers,
backup_disks_per_server,
object_size,
num_objects,
num_overwrites,
replicas,
coordinator_args='',
master_args='',
backup_args='',
master_ram=None,
old_master_ram=None,
num_removals=0,
timeout=100,
log_level='NOTICE',
log_dir='logs',
transport='basic+infud',
verbose=False,
debug=False):
"""Run a recovery on the cluster specified in the config module and
return statisitics about the recovery.
See the config module for more parameters that affect how the recovery
will be run. In particular config.hosts and config.old_master_host which
select which hosts in the cluster recovery will be run on.
@param num_servers: Number of hosts on which to run Masters.
@type num_servers: C{int}
@param backup_disks_per_server: Number of backup disks to use on each
Master. All disks are shared by one Backup
(in the same process as the Master).
@type backup_disks_per_server: C{int}
@param object_size: Size of objects to fill old Master with before crash.
@type object_size: C{int}
@param num_objects: Number of objects to fill old Master with before crash.
@type num_objects: C{int}
@param num_overwrites: Number of writes on same key while filling old Master.
@type num_overwrites: C{int}
@param replicas: Number of times each segment is replicated to different
backups in the cluster.
@type replicas: C{int}
@param coordinator_args: Additional command-line arguments to pass to
the coordinator.
@type coordinator_args: C{str}
@param master_args: Additional command-line arguments to pass to
each server that acts as a master.
@type master_args: C{str}
@param backup_args: Additional command-line arguments to pass to
each server that acts as a backup.
@type backup_args: C{str}
@param master_ram: Megabytes of space allocated in each of the Masters
(except the old Master, see old_master_ram). If left
unspecified same sane default will be attempted based
on num_objects, object_size and num_overwrites.
@type master_ram: C{int}
@param old_master_ram: Megabytes of space allocated in the old Master that
will eventually be crashed. If left unspecified same
sane default will be attempted based on num_objects,
num_overwrites and object_size.
@type old_master_ram: C{int}
@param num_removals: Number of erases to do after inserts. Allows
recoveries where some of the log contains tombstones.
@type num_removals: C{int}
@param timeout: Seconds to wait before giving up and declaring the recovery
to have failed.
@type timeout: C{int}
@param log_level: Log level to use for all servers.
DEBUG, NOTICE, WARNING, or ERROR.
@type log_level: C{str}
@param log_dir: Top-level directory in which to write log files.
A separate subdirectory will be created in this
directory for the log files from this run.
@type log_dir: C{str}
@param transport: A transport name (e.g. infrc, basic+udp, tcp, ...)
@type transport: C{str}
@param verbose: Print information about progress in starting clients
and servers.
@type verbose: C{bool}
@param debug: If True, pause after starting all to allow for debugging
setup such as attaching gdb.
@type debug: C{bool}
@return: A recoverymetrics stats struct (see recoverymetrics.parseRecovery).
"""
server_binary = '%s/server' % obj_path
client_binary = '%s/apps/recovery' % obj_path
ensure_servers_bin = '%s/ensureServers' % obj_path
args = {}
args['num_servers'] = num_servers
args['backup_disks_per_server'] = backup_disks_per_server
args['replicas'] = replicas
args['timeout'] = timeout
args['log_level'] = log_level
args['log_dir'] = log_dir
args['transport'] = transport
args['verbose'] = verbose
args['debug'] = debug
args['coordinator_host'] = getOldMasterHost()
args['coordinator_args'] = coordinator_args
if backup_args:
args['backup_args'] += backup_args;
else:
args['backup_args'] = '--maxNonVolatileBuffers 1000'
# Allocate enough memory on recovery masters to handle several
# recovery partitions (most recoveries will only have one recovery
# partition per master, which is about 500 MB).
args['master_args'] = '-d -D -t 5000'
if master_args:
args['master_args'] += ' ' + master_args;
args['client'] = ('%s -f -n %d -r %d -s %d '
'-k %d -l %s -o %d' % (client_binary,
num_objects, num_removals, object_size,
num_servers, log_level, num_overwrites))
args['old_master_host'] = getOldMasterHost()
args['client_hosts'] = [getOldMasterHost()]
if old_master_ram:
args['old_master_args'] = '-d -t %d' % old_master_ram
else:
# Estimate how much log space the old master will need to hold
# all of the data.
old_master_ram = (200 + (1.3 * num_objects / object_size * num_overwrites))
if args['coordinator_host'][0] == 'rcmaster' and old_master_ram > 42000:
print('Warning: pushing the limits of rcmaster; '
'limiting RAM to 42000 MB to avoid knocking it over; '
'use rcmonster if you need more')
old_master_ram = 42000
args['old_master_args'] = '-d -D -t %d' % old_master_ram
recovery_logs = cluster.run(**args)
# Collect metrics information.
stats = {}
stats['metrics'] = recoverymetrics.parseRecovery(recovery_logs)
report = recoverymetrics.makeReport(stats['metrics']).jsonable()
f = open('%s/metrics' % recovery_logs, 'w')
getDumpstr().print_report(report, file=f)
f.close()
stats['run'] = recovery_logs
stats['count'] = num_objects
stats['size'] = object_size
stats['ns'] = stats['metrics'].client.recoveryNs
stats['report'] = report
return stats
