Hi,
On 10/29/2015 09:54 AM, Luis Periquito wrote:
Only way I can think of that is creating a new crush rule that selects
that specific OSD with min_size = max_size = 1, then creating a pool
with size = 1 and using that crush rule.
Then you can use that pool as you'd use any other pool.
I haven't tested however it should work.
There's also the osd bench command that writes a certain amount of data
to a given OSD:
# ceph tell osd.1 bench
{
"bytes_written": 1073741824,
"blocksize": 4194304,
"bytes_per_sec": 117403227.000000
}
It might help you to figure out whether individual OSDs do not perform
as expected. The amount of data written is limited (but there's a config
setting for it). With 1 GB as in the example above, the write operation
will probably be limited to the journal.
Regards,
Burkhard
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