mirror of
https://github.com/ceph/ceph
synced 2024-12-23 20:03:56 +00:00
74 lines
2.5 KiB
Python
74 lines
2.5 KiB
Python
"""
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Force pg creation on all osds
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"""
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from teuthology import misc as teuthology
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from teuthology.orchestra import run
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import logging
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log = logging.getLogger(__name__)
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def task(ctx, config):
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"""
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Create the specified number of pools and write 16 objects to them (thereby forcing
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the PG creation on each OSD). This task creates pools from all the clients,
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in parallel. It is easy to add other daemon types which have the appropriate
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permissions, but I don't think anything else does.
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The config is just the number of pools to create. I recommend setting
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"mon create pg interval" to a very low value in your ceph config to speed
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this up.
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You probably want to do this to look at memory consumption, and
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maybe to test how performance changes with the number of PGs. For example:
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tasks:
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- ceph:
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config:
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mon:
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mon create pg interval: 1
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- manypools: 3000
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- radosbench:
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clients: [client.0]
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time: 360
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"""
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log.info('creating {n} pools'.format(n=config))
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poolnum = int(config)
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creator_remotes = []
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client_roles = teuthology.all_roles_of_type(ctx.cluster, 'client')
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log.info('got client_roles={client_roles_}'.format(client_roles_=client_roles))
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for role in client_roles:
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log.info('role={role_}'.format(role_=role))
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(creator_remote, ) = ctx.cluster.only('client.{id}'.format(id=role)).remotes.iterkeys()
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creator_remotes.append((creator_remote, 'client.{id}'.format(id=role)))
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remaining_pools = poolnum
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poolprocs=dict()
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while (remaining_pools > 0):
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log.info('{n} pools remaining to create'.format(n=remaining_pools))
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for remote, role_ in creator_remotes:
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poolnum = remaining_pools
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remaining_pools -= 1
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if remaining_pools < 0:
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continue
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log.info('creating pool{num} on {role}'.format(num=poolnum, role=role_))
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proc = remote.run(
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args=[
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'rados',
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'--name', role_,
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'mkpool', 'pool{num}'.format(num=poolnum), '-1',
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run.Raw('&&'),
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'rados',
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'--name', role_,
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'--pool', 'pool{num}'.format(num=poolnum),
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'bench', '0', 'write', '-t', '16', '--block-size', '1'
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],
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wait = False
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)
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log.info('waiting for pool and object creates')
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poolprocs[remote] = proc
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run.wait(poolprocs.itervalues())
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log.info('created all {n} pools and wrote 16 objects to each'.format(n=poolnum))
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