Re: [ceph-users] [Ceph-maintainers] Debian buster information

[Dan Mick]

Péter:

I'm forwarding this to ceph-users for a better answer/discussion


On 5/29/19 6:52 AM, Erdősi Péter wrote:
> Dear CEPH maintainers,
> 
> I would like to ask a few information about CEPH and Debian 10 (Buster).
> We would like to install a CEPH to the RC buster. As I can see, the ceph
> packages in buster now are 12.2.11, however I cannot find the
> ceph-deploy package in the repository.
> 
> I've tried to add the repository from the install guide, but there are
> no buster repo there.
> 
> My questions are:
>  - Is there any non debian repository for buster now?
>  - The buster version from the debian repository should work properly?
> (we intrested in RBD and the libvirt driver, no cephfs or object store
> will be used)
>  - Are there any testing happen with the packages, which are in the
> debian repository? (quality and/or functional.)
>  - Why no ceph-deploy package exist in the debian buster, if the osd and
> mon packages are there?
>  - When will be able to use the repository in buster at
> download.ceph.com? (after buster becomes stable, maybe sooner?)
>  - Could you guess a timerange, when the buster repo will work? (weeks,
> months)
> 
> Thanks,
>  Peter ERDOSI - KIFU
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-- 
Dan Mick
Red Hat, Inc.
Ceph docs: http://ceph.com/docs
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Re: [ceph-users] Object read error - enough copies available

[Oliver Freyermuth]

Hi,

Am 31.05.19 um 12:07 schrieb Burkhard Linke:
> Hi,
> 
> 
> see my post in the recent 'CephFS object mapping.' thread. It describes the 
> necessary commands to lookup a file based on its rados object name.

many thanks! I somehow missed the important part in that thread earlier and 
only got the functional, but not really scaling "find . -xdev -inum 
xxx"-approach before I stopped reading,
but now I have followed it in full - very enlightening indeed, so one needs to 
look at the xattrs of the RADOS objects! 
Very logical once you know it. 

Thanks again!
Oliver

> 
> 
> Regards,
> 
> Burkhard
> 
> 
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Re: [ceph-users] Ceph OSDs fail to start with RDMA

[Lazuardi Nasution]

Hi Orlando,

Thank you for your confirmation. I hope somebody else helps about this
issue.

Best regards,

On Sat, Jun 1, 2019, 03:19 Moreno, Orlando  wrote:

> Hi,
>
>
>
> I have not received any response to this and I haven’t worked on this
> lately. I hope to revisit RDMA messenger on Nautilus in the future.
>
>
>
> Thanks,
>
> Orlando
>
>
>
>
>
> *From:* Lazuardi Nasution [mailto:mrxlazuar...@gmail.com]
> *Sent:* Saturday, May 25, 2019 9:14 PM
> *To:* Moreno, Orlando ; Tang, Haodong <
> haodong.t...@intel.com>
> *Cc:* Ceph Users 
> *Subject:* Re: ceph-users Digest, Vol 60, Issue 26
>
>
>
> Hi Orlando and Haodong,
>
>
>
> Is there any response of this thread? I'm interested with this too.
>
>
>
> Best regards,
>
>
>
> Date: Fri, 26 Jan 2018 21:53:59 +
> From: "Moreno, Orlando" 
> To: "ceph-users@lists.ceph.com" , Ceph
> Development 
> Cc: "Tang, Haodong" 
> Subject: [ceph-users] Ceph OSDs fail to start with RDMA
> Message-ID:
> <
> 034aad465c6cbe4f96d9fb98573a79a63719e...@fmsmsx108.amr.corp.intel.com>
>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi all,
>
> I am trying to bring up a Ceph cluster where the private network is
> communicating via RoCEv2. The storage nodes have 2 dual-port 25Gb Mellanox
> ConnectX-4 NICs, with each NIC's ports bonded (2x25Gb mode 4). I have set
> memory limits to unlimited, can rping to each node, and
> ms_async_rdma_device_name set to the ibdev (mlx5_bond_1). Everything goes
> smoothly until I start bringing up OSDs. Nothing appears in stderr, but
> upon further inspection of the OSD log, I see the following error:
>
> RDMAConnectedSocketImpl activate failed to transition to RTR state: (19)
> No such device
> /build/ceph-12.2.2/src/msg/async/rdma/RDMAConnectedSocketImpl.cc: In
> function 'void RDMAConnectedSocketImpl::handle_connection()' thread
> 7f908633c700 time 2018-01-26 10:47:51.607573
> /build/ceph-12.2.2/src/msg/async/rdma/RDMAConnectedSocketImpl.cc: 221:
> FAILED assert(!r)
>
> ceph version 12.2.2 (cf0baba3b47f9427c6c97e2144b094b7e5ba) luminous
> (stable)
> 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char
> const*)+0x102) [0x564a2ccf7892]
> 2: (RDMAConnectedSocketImpl::handle_connection()+0xb4a) [0x564a2d007fba]
> 3: (EventCenter::process_events(int, std::chrono::duration std::ratio<1l, 10l> >*)+0xa08) [0x564a2cd9a418]
> 4: (()+0xb4f3a8) [0x564a2cd9e3a8]
> 5: (()+0xb8c80) [0x7f9088c04c80]
> 6: (()+0x76ba) [0x7f90892f36ba]
> 7: (clone()+0x6d) [0x7f908836a41d]
> NOTE: a copy of the executable, or `objdump -rdS ` is needed
> to interpret this.
>
> Anyone see this before or have any suggestions?
>
> Thanks,
> Orlando
>
>
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Re: [ceph-users] ceph-users Digest, Vol 60, Issue 26

[Moreno, Orlando]

Hi,

I have not received any response to this and I haven’t worked on this lately. I 
hope to revisit RDMA messenger on Nautilus in the future.

Thanks,
Orlando


From: Lazuardi Nasution [mailto:mrxlazuar...@gmail.com]
Sent: Saturday, May 25, 2019 9:14 PM
To: Moreno, Orlando ; Tang, Haodong 

Cc: Ceph Users 
Subject: Re: ceph-users Digest, Vol 60, Issue 26

Hi Orlando and Haodong,

Is there any response of this thread? I'm interested with this too.

Best regards,

Date: Fri, 26 Jan 2018 21:53:59 +
From: "Moreno, Orlando" 
mailto:orlando.mor...@intel.com>>
To: "ceph-users@lists.ceph.com" 
mailto:ceph-users@lists.ceph.com>>, Ceph
Development 
mailto:ceph-de...@vger.kernel.org>>
Cc: "Tang, Haodong" mailto:haodong.t...@intel.com>>
Subject: [ceph-users] Ceph OSDs fail to start with RDMA
Message-ID:

<034aad465c6cbe4f96d9fb98573a79a63719e...@fmsmsx108.amr.corp.intel.com>

Content-Type: text/plain; charset="us-ascii"

Hi all,

I am trying to bring up a Ceph cluster where the private network is 
communicating via RoCEv2. The storage nodes have 2 dual-port 25Gb Mellanox 
ConnectX-4 NICs, with each NIC's ports bonded (2x25Gb mode 4). I have set 
memory limits to unlimited, can rping to each node, and 
ms_async_rdma_device_name set to the ibdev (mlx5_bond_1). Everything goes 
smoothly until I start bringing up OSDs. Nothing appears in stderr, but upon 
further inspection of the OSD log, I see the following error:

RDMAConnectedSocketImpl activate failed to transition to RTR state: (19) No 
such device
/build/ceph-12.2.2/src/msg/async/rdma/RDMAConnectedSocketImpl.cc: In function 
'void RDMAConnectedSocketImpl::handle_connection()' thread 7f908633c700 time 
2018-01-26 10:47:51.607573
/build/ceph-12.2.2/src/msg/async/rdma/RDMAConnectedSocketImpl.cc: 221: FAILED 
assert(!r)

ceph version 12.2.2 (cf0baba3b47f9427c6c97e2144b094b7e5ba) luminous (stable)
1: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x102) 
[0x564a2ccf7892]
2: (RDMAConnectedSocketImpl::handle_connection()+0xb4a) [0x564a2d007fba]
3: (EventCenter::process_events(int, std::chrono::duration >*)+0xa08) [0x564a2cd9a418]
4: (()+0xb4f3a8) [0x564a2cd9e3a8]
5: (()+0xb8c80) [0x7f9088c04c80]
6: (()+0x76ba) [0x7f90892f36ba]
7: (clone()+0x6d) [0x7f908836a41d]
NOTE: a copy of the executable, or `objdump -rdS ` is needed to 
interpret this.

Anyone see this before or have any suggestions?

Thanks,
Orlando
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Re: [ceph-users] MDS hangs in "heartbeat_map" deadlock

[Patrick Donnelly]

Hi Stefan,

Sorry I couldn't get back to you sooner.

On Mon, May 27, 2019 at 5:02 AM Stefan Kooman  wrote:
>
> Quoting Stefan Kooman (ste...@bit.nl):
> > Hi Patrick,
> >
> > Quoting Stefan Kooman (ste...@bit.nl):
> > > Quoting Stefan Kooman (ste...@bit.nl):
> > > > Quoting Patrick Donnelly (pdonn...@redhat.com):
> > > > > Thanks for the detailed notes. It looks like the MDS is stuck
> > > > > somewhere it's not even outputting any log messages. If possible, it'd
> > > > > be helpful to get a coredump (e.g. by sending SIGQUIT to the MDS) or,
> > > > > if you're comfortable with gdb, a backtrace of any threads that look
> > > > > suspicious (e.g. not waiting on a futex) including `info threads`.
> > >
> > > Today the issue reappeared (after being absent for ~ 3 weeks). This time
> > > the standby MDS could take over and would not get into a deadlock
> > > itself. We made gdb traces again, which you can find over here:
> > >
> > > https://8n1.org/14011/d444
> >
> > We are still seeing these crashes occur ~ every 3 weeks or so. Have you
> > find the time to look into the backtraces / gdb dumps?
>
> We have not seen this issue anymore for the past three months. We have
> updated the cluster to 12.2.11 in the meantime, but not sure if that is
> related. Hopefully it stays away.

Looks like you hit the infinite loop bug in OpTracker. It was fixed in
12.2.11: https://tracker.ceph.com/issues/37977

The problem was introduced in 12.2.8.

-- 
Patrick Donnelly, Ph.D.
He / Him / His
Senior Software Engineer
Red Hat Sunnyvale, CA
GPG: 19F28A586F808C2402351B93C3301A3E258DD79D
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Re: [ceph-users] performance in a small cluster

[Reed Dier]

Is there any other evidence of this?

I have 20 5100 MAX (MTFDDAK1T9TCC) and have not experienced any real issues 
with them.
I would pick my Samsung SM863a's or any of my Intel's over the Micron's, but I 
haven't seen the Micron's cause any issues for me.
For what its worth, they are all FW D0MU027, which is likely more out of date, 
but it is working for me.

However, I would steer people away from the Micron 9100 MAX 
(MTFDHAX1T2MCF-1AN1ZABYY) as an NVMe disk to use for WAL/DB, as I have seen 
performance, and reliability issues with those.

Just my 2¢

Reed

> On May 29, 2019, at 12:52 PM, Paul Emmerich  wrote:
> 
> 
> 
> On Wed, May 29, 2019 at 9:36 AM Robert Sander  > wrote:
> Am 24.05.19 um 14:43 schrieb Paul Emmerich:
> > * SSD model? Lots of cheap SSDs simply can't handle more than that
> 
> The customer currently has 12 Micron 5100 1,92TB (Micron_5100_MTFDDAK1)
> SSDs and will get a batch of Micron 5200 in the next days
> 
> And there's your bottleneck ;)
> The Micron 5100 performs horribly in Ceph, I've seen similar performance in 
> another cluster with these disks.
> Basically they max out at around 1000 IOPS and report 100% utilization and 
> feel slow.
> 
> Haven't seen the 5200 yet.
> 
> 
> Paul
>  
> 
> We have identified the performance settings in the BIOS as a major
> factor. Ramping that up we got a remarkable performance increase.
> 
> Regards
> -- 
> Robert Sander
> Heinlein Support GmbH
> Linux: Akademie - Support - Hosting
> http://www.heinlein-support.de 
> 
> Tel: 030-405051-43
> Fax: 030-405051-19
> 
> Zwangsangaben lt. §35a GmbHG:
> HRB 93818 B / Amtsgericht Berlin-Charlottenburg,
> Geschäftsführer: Peer Heinlein  -- Sitz: Berlin
> 
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Re: [ceph-users] Object read error - enough copies available

[Burkhard Linke]

Hi,


see my post in the recent 'CephFS object mapping.' thread. It describes 
the necessary commands to lookup a file based on its rados object name.



Regards,

Burkhard


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