Hi Dan,
so I change the crushmap to:
rule rbd {
ruleset 2
type replicated
min_size 1
max_size 10
step take default
step chooseleaf firstn 0 type rack
step emit
}
than I look at one pg:
2.33d 1 0 0 0 4194304 0 0 active+clean 2013-03-28 12:12:09.937610
6'1 21'37 [1,18] [1,18] 6'1 2013-03-28 11:46:40.949643 6'1 2013-03-28
11:46:40.949643
so everything is right, the pg is mapped to osd.1 and osd.18, which are
two different racks.
Than I shut down osd.1 and the cluster becomes degraded.
ceph -s
health HEALTH_WARN 378 pgs degraded; 378 pgs stuck unclean; recovery
39/904 degraded (4.314%); 1/24 in osds are down
monmap e1: 3 mons at
{a=192.168.195.31:6789/0,b=192.168.195.33:6789/0,c=192.168.195.35:6789/0},
election epoch 6, quorum 0,1,2 a,b,c
osdmap e24: 24 osds: 23 up, 24 in
pgmap v426: 4800 pgs: 4422 active+clean, 378 active+degraded; 1800
MB data, 3789 MB used, 174 TB / 174 TB avail; 39/904 degraded (4.314%)
mdsmap e1: 0/0/1 up
If I now look at the pg.
2.33d 1 0 1 0 4194304 0 0 active+degraded 2013-03-28
12:16:11.049936 6'1 23'39 [18] [18] 6'1 2013-03-28 11:46:40.949643 6'1
2013-03-28 11:46:40.949643
It seems that the crush algo. doesn't find a new place for the replica.
ceph pg 2.33d query
{ "state": "active+degraded",
"epoch": 24,
"up": [
18],
"acting": [
18],
"info": { "pgid": "2.33d",
"last_update": "6'1",
"last_complete": "6'1",
"log_tail": "0'0",
"last_backfill": "MAX",
"purged_snaps": "[]",
"history": { "epoch_created": 1,
"last_epoch_started": 24,
"last_epoch_clean": 24,
"last_epoch_split": 0,
"same_up_since": 23,
"same_interval_since": 23,
"same_primary_since": 23,
"last_scrub": "6'1",
"last_scrub_stamp": "2013-03-28 11:46:40.949643",
"last_deep_scrub": "6'1",
"last_deep_scrub_stamp": "2013-03-28 11:46:40.949643",
"last_clean_scrub_stamp": "2013-03-28 11:46:40.949643"},
"stats": { "version": "6'1",
"reported": "23'39",
"state": "active+degraded",
"last_fresh": "2013-03-28 12:16:11.059607",
"last_change": "2013-03-28 12:16:11.049936",
"last_active": "2013-03-28 12:16:11.059607",
"last_clean": "2013-03-28 11:44:59.181618",
"last_unstale": "2013-03-28 12:16:11.059607",
"mapping_epoch": 21,
"log_start": "0'0",
"ondisk_log_start": "0'0",
"created": 1,
"last_epoch_clean": 1,
"parent": "0.0",
"parent_split_bits": 0,
"last_scrub": "6'1",
"last_scrub_stamp": "2013-03-28 11:46:40.949643",
"last_deep_scrub": "6'1",
"last_deep_scrub_stamp": "2013-03-28 11:46:40.949643",
"last_clean_scrub_stamp": "2013-03-28 11:46:40.949643",
"log_size": 0,
"ondisk_log_size": 0,
"stats_invalid": "0",
"stat_sum": { "num_bytes": 4194304,
"num_objects": 1,
"num_object_clones": 0,
"num_object_copies": 0,
"num_objects_missing_on_primary": 0,
"num_objects_degraded": 0,
"num_objects_unfound": 0,
"num_read": 0,
"num_read_kb": 0,
"num_write": 1,
"num_write_kb": 4096,
"num_scrub_errors": 0,
"num_objects_recovered": 2,
"num_bytes_recovered": 8388608,
"num_keys_recovered": 0},
"stat_cat_sum": {},
"up": [
18],
"acting": [
18]},
"empty": 0,
"dne": 0,
"incomplete": 0,
"last_epoch_started": 24},
"recovery_state": [
{ "name": "Started\/Primary\/Active",
"enter_time": "2013-03-28 12:16:11.049925",
"might_have_unfound": [],
"recovery_progress": { "backfill_target": -1,
"waiting_on_backfill": 0,
"backfill_pos": "0\/\/0\/\/-1",
"backfill_info": { "begin": "0\/\/0\/\/-1",
"end": "0\/\/0\/\/-1",
"objects": []},
"peer_backfill_info": { "begin": "0\/\/0\/\/-1",
"end": "0\/\/0\/\/-1",
"objects": []},
"backfills_in_flight": [],
"pull_from_peer": [],
"pushing": []},
"scrub": { "scrubber.epoch_start": "0",
"scrubber.active": 0,
"scrubber.block_writes": 0,
"scrubber.finalizing": 0,
"scrubber.waiting_on": 0,
"scrubber.waiting_on_whom": []}},
{ "name": "Started",
"enter_time": "2013-03-28 12:16:10.029226"}]}
-martin
On 28.03.2013 08:57, Dan van der Ster wrote:
> Shouldn't it just be:
>
> step take default
> step chooseleaf firstn 0 type rack
> step emit
>
> Like he has for data and metadata?
>
> --
> Dan
>
> On Thu, Mar 28, 2013 at 2:51 AM, Martin Mailand <martin@xxxxxxxxxxxx> wrote:
>> Hi John,
>>
>> I still think this part in the crushmap is wrong.
>>
>> step take default
>> step choose firstn 0 type rack
>> step chooseleaf firstn 0 type host
>> step emit
>>
>> I first take from the defaut -> that's okay,
>> Now I take two from the rack -> that's still ok
>> But now, I will take 2 host in each rack, -> that would be 4 locations,
>> but I have a replication level of 2.
>>
>> Or don't I understand the placement right?
>>
>> -martin
>>
>> On 28.03.2013 02:25, John Wilkins wrote:
>>> So the OSD you shutdown is down and in. How long does it stay in the
>>> degraded state? In the docs here,
>>> http://ceph.com/docs/master/rados/operations/monitoring-osd-pg/ , we
>>> discuss the notion that a down OSD is not technically out of the
>>> cluster for awhile. I believe the default value is 300 seconds, which
>>> is about 5 minutes. From what I can see from your "ceph osd tree"
>>> command, all your OSDs are running. You can change the time it takes
>>> to mark a down OSD out. That's " mon osd down out interval", discussed
>>> in this section:
>>> http://ceph.com/docs/master/rados/operations/monitoring-osd-pg/#degraded
>>>
>>> On Wed, Mar 27, 2013 at 5:56 PM, Martin Mailand <martin@xxxxxxxxxxxx> wrote:
>>>> Hi,
>>>>
>>>> that's the config http://pastebin.com/2JzABSYt
>>>> ceph osd dump http://pastebin.com/GSCGKL1k
>>>> ceph osd tree http://pastebin.com/VSgPFRYv
>>>>
>>>> As far as I can tell they are not mapped right.
>>>>
>>>> sdmap e133 pool 'rbd' (2) object '2.31a' -> pg 2.f3caaf00 (2.300) -> up
>>>> [13,23] acting [13,23]
>>>>
>>>> -martin
>>>>
>>>> On 28.03.2013 01:09, John Wilkins wrote:
>>>>> We need a bit more information. If you can do: "ceph osd dump", "ceph
>>>>> osd tree", and paste your ceph conf, we might get a bit further. The
>>>>> CRUSH hierarchy looks okay. I can't see the replica size from this
>>>>> though.
>>>>>
>>>>> Have you followed this procedure to see if your object is getting
>>>>> remapped? http://ceph.com/docs/master/rados/operations/monitoring-osd-pg/#finding-an-object-location
>>>>>
>>>>> On Thu, Mar 21, 2013 at 12:02 PM, Martin Mailand <martin@xxxxxxxxxxxx> wrote:
>>>>>> Hi,
>>>>>>
>>>>>> I want to change my crushmap to reflect my setup, I have two racks with
>>>>>> each 3 hosts. I want to use for the rbd pool a replication size of 2.
>>>>>> The failure domain should be the rack, so each replica should be in each
>>>>>> rack. That works so far.
>>>>>> But if I shutdown a host the clusters stays degraded, but I want that
>>>>>> the now missing replicas get replicated to the two remaining hosts in
>>>>>> this rack.
>>>>>>
>>>>>> Here is crushmap.
>>>>>> http://pastebin.com/UaB6LfKs
>>>>>>
>>>>>> Any idea what I did wrong?
>>>>>>
>>>>>> -martin
>>>>>> _______________________________________________
>>>>>> ceph-users mailing list
>>>>>> ceph-users@xxxxxxxxxxxxxx
>>>>>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>>>>
>>>>>
>>>>>
>>>
>>>
>>>
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>> ceph-users@xxxxxxxxxxxxxx
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