Re: Ceph health error (was: Prioritize recovery over backfilling)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi all,

Maybe this will help:

The issue is with shards 3,4 and 5 of PG 6.3f:

LOG's of OSD's 16, 17 & 36 (the ones crashing on startup).


Log OSD.16 (shard 4):

2018-06-08 08:35:01.727261 7f4c585e3700 -1 bluestore(/var/lib/ceph/osd/ceph-16) _txc_add_transaction error (2) No such file or directory not handled on operation 30 (op 0, counting from 0)
2018-06-08 08:35:01.727273 7f4c585e3700 -1 bluestore(/var/lib/ceph/osd/ceph-16) ENOENT on clone suggests osd bug
2018-06-08 08:35:01.727274 7f4c585e3700  0 bluestore(/var/lib/ceph/osd/ceph-16)  transaction dump:
{
    "ops": [
        {
            "op_num": 0,
            "op_name": "clonerange2",
            "collection": "6.3fs4_head",
            "src_oid": "4#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903d0",
            "dst_oid": "4#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "src_offset": 950272,
            "len": 98304,
            "dst_offset": 950272
        },
        {
            "op_num": 1,
            "op_name": "remove",
            "collection": "6.3fs4_head",
            "oid": "4#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903d0"
        },
        {
            "op_num": 2,
            "op_name": "setattrs",
            "collection": "6.3fs4_head",
            "oid": "4#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "attr_lens": {
                "_": 297,
                "hinfo_key": 18,
                "snapset": 35
            }
        },
        {
            "op_num": 3,
            "op_name": "clonerange2",
            "collection": "6.3fs4_head",
            "src_oid": "4#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903cf",
            "dst_oid": "4#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "src_offset": 679936,
            "len": 274432,
            "dst_offset": 679936
        },
        {
            "op_num": 4,
            "op_name": "remove",
            "collection": "6.3fs4_head",
            "oid": "4#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903cf"
        },
        {
            "op_num": 5,
            "op_name": "setattrs",
            "collection": "6.3fs4_head",
            "oid": "4#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "attr_lens": {
                "_": 297,
                "hinfo_key": 18,
                "snapset": 35
            }
        },
        {
            "op_num": 6,
            "op_name": "nop"
        },
        {
            "op_num": 7,
            "op_name": "op_omap_rmkeyrange",
            "collection": "6.3fs4_head",
            "oid": "4#6:fc000000::::head#",
            "first": "0000011124.00000000000000590799",
            "last": "4294967295.18446744073709551615"
        },
        {
            "op_num": 8,
            "op_name": "omap_setkeys",
            "collection": "6.3fs4_head",
            "oid": "4#6:fc000000::::head#",
            "attr_lens": {
                "_biginfo": 597,
                "_epoch": 4,
                "_info": 953,
                "can_rollback_to": 12,
                "rollback_info_trimmed_to": 12
            }
        }
    ]
}

2018-06-08 08:35:01.730584 7f4c585e3700 -1 /home/builder/source/ceph-12.2.2/src/os/bluestore/BlueStore.cc: In function 'void BlueStore::_txc_add_transaction(BlueStore::TransContext*, ObjectStore::Transaction*)' thread 7f4c585e3700 time 2018-06-08 08:35:01.727379
/home/builder/source/ceph-12.2.2/src/os/bluestore/BlueStore.cc: 9363: FAILED assert(0 == "unexpected error")

 ceph version 12.2.2 (215dd7151453fae88e6f968c975b6ce309d42dcf) luminous (stable)
 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x102) [0x558e08ba4202]
 2: (BlueStore::_txc_add_transaction(BlueStore::TransContext*, ObjectStore::Transaction*)+0x15fa) [0x558e08a55c3a]
 3: (BlueStore::queue_transactions(ObjectStore::Sequencer*, std::vector<ObjectStore::Transaction, std::allocator<ObjectStore::Transaction> >&, boost::intrusive_ptr<TrackedOp>, ThreadPool::TPHandle*)+0x546) [0x558e08a572a6]
 4: (ObjectStore::queue_transaction(ObjectStore::Sequencer*, ObjectStore::Transaction&&, Context*, Context*, Context*, boost::intrusive_ptr<TrackedOp>, ThreadPool::TPHandle*)+0x14f) [0x558e085fa37f]
 5: (OSD::dispatch_context_transaction(PG::RecoveryCtx&, PG*, ThreadPool::TPHandle*)+0x6c) [0x558e0857db5c]
 6: (OSD::process_peering_events(std::__cxx11::list<PG*, std::allocator<PG*> > const&, ThreadPool::TPHandle&)+0x442) [0x558e085abec2]
 7: (ThreadPool::BatchWorkQueue<PG>::_void_process(void*, ThreadPool::TPHandle&)+0x2c) [0x558e0861a91c]
 8: (ThreadPool::worker(ThreadPool::WorkThread*)+0xeb8) [0x558e08bab3a8]
 9: (ThreadPool::WorkThread::entry()+0x10) [0x558e08bac540]
 10: (()+0x7494) [0x7f4c709ca494]
 11: (clone()+0x3f) [0x7f4c6fa51aff]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.


Log OSD.17 (Shard 5):

2018-06-08 08:35:56.745249 7fe3fa687700 -1 bluestore(/var/lib/ceph/osd/ceph-17) _txc_add_transaction error (2) No such file or directory not handled on operation 30 (op 0, counting from 0)
2018-06-08 08:35:56.745264 7fe3fa687700 -1 bluestore(/var/lib/ceph/osd/ceph-17) ENOENT on clone suggests osd bug
2018-06-08 08:35:56.745266 7fe3fa687700  0 bluestore(/var/lib/ceph/osd/ceph-17)  transaction dump:
{
    "ops": [
        {
            "op_num": 0,
            "op_name": "clonerange2",
            "collection": "6.3fs5_head",
            "src_oid": "5#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903d0",
            "dst_oid": "5#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "src_offset": 950272,
            "len": 98304,
            "dst_offset": 950272
        },
        {
            "op_num": 1,
            "op_name": "remove",
            "collection": "6.3fs5_head",
            "oid": "5#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903d0"
        },
        {
            "op_num": 2,
            "op_name": "setattrs",
            "collection": "6.3fs5_head",
            "oid": "5#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "attr_lens": {
                "_": 297,
                "hinfo_key": 18,
                "snapset": 35
            }
        },
        {
            "op_num": 3,
            "op_name": "clonerange2",
            "collection": "6.3fs5_head",
            "src_oid": "5#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903cf",
            "dst_oid": "5#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "src_offset": 679936,
            "len": 274432,
            "dst_offset": 679936
        },
        {
            "op_num": 4,
            "op_name": "remove",
            "collection": "6.3fs5_head",
            "oid": "5#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903cf"
        },
        {
            "op_num": 5,
            "op_name": "setattrs",
            "collection": "6.3fs5_head",
            "oid": "5#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "attr_lens": {
                "_": 297,
                "hinfo_key": 18,
                "snapset": 35
            }
        },
        {
            "op_num": 6,
            "op_name": "nop"
        },
        {
            "op_num": 7,
            "op_name": "op_omap_rmkeyrange",
            "collection": "6.3fs5_head",
            "oid": "5#6:fc000000::::head#",
            "first": "0000011124.00000000000000590799",
            "last": "4294967295.18446744073709551615"
        },
        {
            "op_num": 8,
            "op_name": "omap_setkeys",
            "collection": "6.3fs5_head",
            "oid": "5#6:fc000000::::head#",
            "attr_lens": {
                "_biginfo": 586,
                "_epoch": 4,
                "_info": 953,
                "can_rollback_to": 12,
                "rollback_info_trimmed_to": 12
            }
        }
    ]
}

2018-06-08 08:35:56.748436 7fe3fa687700 -1 /home/builder/source/ceph-12.2.2/src/os/bluestore/BlueStore.cc: In function 'void BlueStore::_txc_add_transaction(BlueStore::TransContext*, ObjectStore::Transaction*)' thread 7fe3fa687700 time 2018-06-08 08:35:56.745458
/home/builder/source/ceph-12.2.2/src/os/bluestore/BlueStore.cc: 9363: FAILED assert(0 == "unexpected error")

 ceph version 12.2.2 (215dd7151453fae88e6f968c975b6ce309d42dcf) luminous (stable)
 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x102) [0x55695de1f202]
 2: (BlueStore::_txc_add_transaction(BlueStore::TransContext*, ObjectStore::Transaction*)+0x15fa) [0x55695dcd0c3a]
 3: (BlueStore::queue_transactions(ObjectStore::Sequencer*, std::vector<ObjectStore::Transaction, std::allocator<ObjectStore::Transaction> >&, boost::intrusive_ptr<TrackedOp>, ThreadPool::TPHandle*)+0x546) [0x55695dcd22a6]
 4: (ObjectStore::queue_transaction(ObjectStore::Sequencer*, ObjectStore::Transaction&&, Context*, Context*, Context*, boost::intrusive_ptr<TrackedOp>, ThreadPool::TPHandle*)+0x14f) [0x55695d87537f]
 5: (OSD::dispatch_context_transaction(PG::RecoveryCtx&, PG*, ThreadPool::TPHandle*)+0x6c) [0x55695d7f8b5c]
 6: (OSD::process_peering_events(std::__cxx11::list<PG*, std::allocator<PG*> > const&, ThreadPool::TPHandle&)+0x442) [0x55695d826ec2]
 7: (ThreadPool::BatchWorkQueue<PG>::_void_process(void*, ThreadPool::TPHandle&)+0x2c) [0x55695d89591c]
 8: (ThreadPool::worker(ThreadPool::WorkThread*)+0xeb8) [0x55695de263a8]
 9: (ThreadPool::WorkThread::entry()+0x10) [0x55695de27540]
 10: (()+0x7494) [0x7fe412a6e494]
 11: (clone()+0x3f) [0x7fe411af5aff]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.


Log OSD.36 (Shard 3):

    -3> 2018-06-08 09:25:36.660055 7f43c9262700 -1 bluestore(/var/lib/ceph/osd/ceph-36) _txc_add_transaction error (2) No such file or directory not handled on operation 30 (op 0, counting from 0)
    -2> 2018-06-08 09:25:36.660068 7f43c9262700 -1 bluestore(/var/lib/ceph/osd/ceph-36) ENOENT on clone suggests osd bug
    -1> 2018-06-08 09:25:36.660070 7f43c9262700  0 bluestore(/var/lib/ceph/osd/ceph-36)  transaction dump:
{
    "ops": [
        {
            "op_num": 0,
            "op_name": "clonerange2",
            "collection": "6.3fs3_head",
            "src_oid": "3#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903d0",
            "dst_oid": "3#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "src_offset": 950272,
            "len": 98304,
            "dst_offset": 950272
        },
        {
            "op_num": 1,
            "op_name": "remove",
            "collection": "6.3fs3_head",
            "oid": "3#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903d0"
        },
        {
            "op_num": 2,
            "op_name": "setattrs",
            "collection": "6.3fs3_head",
            "oid": "3#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "attr_lens": {
                "_": 297,
                "hinfo_key": 18,
                "snapset": 35
            }
        },
        {
            "op_num": 3,
            "op_name": "clonerange2",
            "collection": "6.3fs3_head",
            "src_oid": "3#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903cf",
            "dst_oid": "3#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "src_offset": 679936,
            "len": 274432,
            "dst_offset": 679936
        },
        {
            "op_num": 4,
            "op_name": "remove",
            "collection": "6.3fs3_head",
            "oid": "3#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#903cf"
        },
        {
            "op_num": 5,
            "op_name": "setattrs",
            "collection": "6.3fs3_head",
            "oid": "3#6:fc074663:::rbd_data.5.6c1d9574b0dc51.00000000000312db:head#",
            "attr_lens": {
                "_": 297,
                "hinfo_key": 18,
                "snapset": 35
            }
        },
        {
            "op_num": 6,
            "op_name": "nop"
        },
        {
            "op_num": 7,
            "op_name": "op_omap_rmkeyrange",
            "collection": "6.3fs3_head",
            "oid": "3#6:fc000000::::head#",
            "first": "0000011124.00000000000000590799",
            "last": "4294967295.18446744073709551615"
        },
        {
            "op_num": 8,
            "op_name": "omap_setkeys",
            "collection": "6.3fs3_head",
            "oid": "3#6:fc000000::::head#",
            "attr_lens": {
                "_biginfo": 743,
                "_epoch": 4,
                "_info": 953,
                "can_rollback_to": 12,
                "rollback_info_trimmed_to": 12
            }
        }
    ]
}

     0> 2018-06-08 09:25:36.663334 7f43c9262700 -1 /home/builder/source/ceph-12.2.2/src/os/bluestore/BlueStore.cc: In function 'void BlueStore::_txc_add_transaction(BlueStore::TransContext*, ObjectStore::Transaction*)' thread 7f43c9262700 time 2018-06-08 09:25:36.660177
/home/builder/source/ceph-12.2.2/src/os/bluestore/BlueStore.cc: 9363: FAILED assert(0 == "unexpected error")

 ceph version 12.2.2 (215dd7151453fae88e6f968c975b6ce309d42dcf) luminous (stable)
 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x102) [0x557025013202]
 2: (BlueStore::_txc_add_transaction(BlueStore::TransContext*, ObjectStore::Transaction*)+0x15fa) [0x557024ec4c3a]
 3: (BlueStore::queue_transactions(ObjectStore::Sequencer*, std::vector<ObjectStore::Transaction, std::allocator<ObjectStore::Transaction> >&, boost::intrusive_ptr<TrackedOp>, ThreadPool::TPHandle*)+0x546) [0x557024ec62a6]
 4: (ObjectStore::queue_transaction(ObjectStore::Sequencer*, ObjectStore::Transaction&&, Context*, Context*, Context*, boost::intrusive_ptr<TrackedOp>, ThreadPool::TPHandle*)+0x14f) [0x557024a6937f]
 5: (OSD::dispatch_context_transaction(PG::RecoveryCtx&, PG*, ThreadPool::TPHandle*)+0x6c) [0x5570249ecb5c]
 6: (OSD::process_peering_events(std::__cxx11::list<PG*, std::allocator<PG*> > const&, ThreadPool::TPHandle&)+0x442) [0x557024a1aec2]
 7: (ThreadPool::BatchWorkQueue<PG>::_void_process(void*, ThreadPool::TPHandle&)+0x2c) [0x557024a8991c]
 8: (ThreadPool::worker(ThreadPool::WorkThread*)+0xeb8) [0x55702501a3a8]
 9: (ThreadPool::WorkThread::entry()+0x10) [0x55702501b540]
 10: (()+0x7494) [0x7f43e0e48494]
 11: (clone()+0x3f) [0x7f43dfecfaff]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.


Kind regards,
Caspar Smit

2018-06-08 16:38 GMT+02:00 Caspar Smit <casparsmit@xxxxxxxxxxx>:
Hi all,

I seem to be hitting these tracker issues:

https://tracker.ceph.com/issues/23145
http://tracker.ceph.com/issues/24422

PG's 6.1 and 6.3f are having the issues

When i list all PG's of a down OSD with:

ceph-objectstore-tool --dry-run --type bluestore --data-path /var/lib/ceph/osd/ceph-17/ --op list-pgs 

There are a lot of 'double' pgid's like (also for other pg's):

6.3fs3
6.3fs5

Is that normal? I would assume different shards for EC would be on seperate OSD's 

We still have 4 OSD's down and 2 PG's down+remapped and i can't find any way to get the crashed OSD's back up.

    pg 6.1 is down+remapped, acting [6,3,2147483647,29,2147483647,2147483647]
    pg 6.3f is down+remapped, acting [20,24,2147483647,2147483647,3,28]

Kind regards,
Caspar Smit

2018-06-08 8:53 GMT+02:00 Caspar Smit <casparsmit@xxxxxxxxxxx>:
Update:

I've unset nodown to let it continue but now 4 osd's are down and cannot be brought up again, here's what the lofgfile reads:

2018-06-08 08:35:01.716245 7f4c58de4700  0 log_channel(cluster) log [INF] : 6.e3s0 continuing backfill to osd.37(4) from (10864'911406,11124'921472] 6:c7d71bbd:::rbd_data.5.6c1d9574b0dc51.0000000000bf38b9:head to 11124'921472
2018-06-08 08:35:01.727261 7f4c585e3700 -1 bluestore(/var/lib/ceph/osd/ceph-16) _txc_add_transaction error (2) No such file or directory not handled on operation 30 (op 0, counting from 0)
2018-06-08 08:35:01.727273 7f4c585e3700 -1 bluestore(/var/lib/ceph/osd/ceph-16) ENOENT on clone suggests osd bug

2018-06-08 08:35:01.730584 7f4c585e3700 -1 /home/builder/source/ceph-12.2.2/src/os/bluestore/BlueStore.cc: In function 'void BlueStore::_txc_add_transaction(BlueStore::TransContext*, ObjectStore::Transaction*)' thread 7f4c585e3700 time 2018-06-08 08:35:01.727379
/home/builder/source/ceph-12.2.2/src/os/bluestore/BlueStore.cc: 9363: FAILED assert(0 == "unexpected error")

 ceph version 12.2.2 (215dd7151453fae88e6f968c975b6ce309d42dcf) luminous (stable)
 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x102) [0x558e08ba4202]
 2: (BlueStore::_txc_add_transaction(BlueStore::TransContext*, ObjectStore::Transaction*)+0x15fa) [0x558e08a55c3a]
 3: (BlueStore::queue_transactions(ObjectStore::Sequencer*, std::vector<ObjectStore::Transaction, std::allocator<ObjectStore::Transaction> >&, boost::intrusive_ptr<TrackedOp>, ThreadPool::TPHandle*)+0x546) [0x558e08a572a6]
 4: (ObjectStore::queue_transaction(ObjectStore::Sequencer*, ObjectStore::Transaction&&, Context*, Context*, Context*, boost::intrusive_ptr<TrackedOp>, ThreadPool::TPHandle*)+0x14f) [0x558e085fa37f]
 5: (OSD::dispatch_context_transaction(PG::RecoveryCtx&, PG*, ThreadPool::TPHandle*)+0x6c) [0x558e0857db5c]
 6: (OSD::process_peering_events(std::__cxx11::list<PG*, std::allocator<PG*> > const&, ThreadPool::TPHandle&)+0x442) [0x558e085abec2]
 7: (ThreadPool::BatchWorkQueue<PG>::_void_process(void*, ThreadPool::TPHandle&)+0x2c) [0x558e0861a91c]
 8: (ThreadPool::worker(ThreadPool::WorkThread*)+0xeb8) [0x558e08bab3a8]
 9: (ThreadPool::WorkThread::entry()+0x10) [0x558e08bac540]
 10: (()+0x7494) [0x7f4c709ca494]
 11: (clone()+0x3f) [0x7f4c6fa51aff]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.

Any help is highly appreciated.

Kind regards,
Caspar Smit


2018-06-08 7:57 GMT+02:00 Caspar Smit <casparsmit@xxxxxxxxxxx>:
Well i let it run with flags nodown and it looked like it would finish BUT it all went wrong somewhere:

This is now the state:

    health: HEALTH_ERR
            nodown flag(s) set
            5602396/94833780 objects misplaced (5.908%)
            Reduced data availability: 143 pgs inactive, 142 pgs peering, 7 pgs stale
            Degraded data redundancy: 248859/94833780 objects degraded (0.262%), 194 pgs unclean, 21 pgs degraded, 12 pgs undersized
            11 stuck requests are blocked > 4096 sec

    pgs:     13.965% pgs not active
             248859/94833780 objects degraded (0.262%)
             5602396/94833780 objects misplaced (5.908%)
             830 active+clean
             75  remapped+peering
             66  peering
             26  active+remapped+backfill_wait
             6   active+undersized+degraded+remapped+backfill_wait
             6   active+recovery_wait+degraded+remapped
             3   active+undersized+degraded+remapped+backfilling
             3   stale+active+undersized+degraded+remapped+backfill_wait
             3   stale+active+remapped+backfill_wait
             2   active+recovery_wait+degraded
             2   active+remapped+backfilling
             1   activating+degraded+remapped
             1   stale+remapped+peering


#ceph health detail shows:

REQUEST_STUCK 11 stuck requests are blocked > 4096 sec
    11 ops are blocked > 16777.2 sec
    osds 4,7,23,24 have stuck requests > 16777.2 sec


So what happened and what should i do now?

Thank you very much for any help

Kind regards,
Caspar


2018-06-07 13:33 GMT+02:00 Sage Weil <sage@xxxxxxxxxxxx>:
On Wed, 6 Jun 2018, Caspar Smit wrote:
> Hi all,
>
> We have a Luminous 12.2.2 cluster with 3 nodes and i recently added a node
> to it.
>
> osd-max-backfills is at the default 1 so backfilling didn't go very fast
> but that doesn't matter.
>
> Once it started backfilling everything looked ok:
>
> ~300 pgs in backfill_wait
> ~10 pgs backfilling (~number of new osd's)
>
> But i noticed the degraded objects increasing a lot. I presume a pg that is
> in backfill_wait state doesn't accept any new writes anymore? Hence
> increasing the degraded objects?
>
> So far so good, but once a while i noticed a random OSD flapping (they come
> back up automatically). This isn't because the disk is saturated but a
> driver/controller/kernel incompatibility which 'hangs' the disk for a short
> time (scsi abort_task error in syslog). Investigating further i noticed
> this was already the case before the node expansion.
>
> These OSD's flapping results in lots of pg states which are a bit worrying:
>
>              109 active+remapped+backfill_wait
>              80  active+undersized+degraded+remapped+backfill_wait
>              51  active+recovery_wait+degraded+remapped
>              41  active+recovery_wait+degraded
>              27  active+recovery_wait+undersized+degraded+remapped
>              14  active+undersized+remapped+backfill_wait
>              4   active+undersized+degraded+remapped+backfilling
>
> I think the recovery_wait is more important then the backfill_wait, so i
> like to prioritize these because the recovery_wait was triggered by the
> flapping OSD's

Just a note: this is fixed in mimic.  Previously, we would choose the
highest-priority PG to start recovery on at the time, but once recovery
had started, the appearance of a new PG with a higher priority (e.g.,
because it finished peering after the others) wouldn't preempt/cancel the
other PG's recovery, so you would get behavior like the above.

Mimic implements that preemption, so you should not see behavior like
this.  (If you do, then the function that assigns a priority score to a
PG needs to be tweaked.)

sage




_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

[Index of Archives]     [Information on CEPH]     [Linux Filesystem Development]     [Ceph Development]     [Ceph Large]     [Ceph Dev]     [Linux USB Development]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [xfs]


  Powered by Linux