Re: Ceph on ARM ?

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Hi guys,

Thank you all for your input. I will try to get my hands on a few Huawei servers for testing before deciding.

The specs are really interesting, it looks like they have some power in them besides the high core numbers (2.6 Ghz) :

https://en.wikichip.org/wiki/hisilicon/kunpeng/920-6426

https://e.huawei.com/en/products/servers/taishan-server/taishan-5280-v2

I'll let you know how it goes.



On 11/24/2020 6:36 PM, Peter Woodman wrote:
I've been running ceph on a heterogeneous mix of rock64 and rpi4 SBCs. i've had to do my own builds, as the upstream ones started off with thunked-out checksumming due to (afaict) different arm feature sets between upstream's build targets and my SBCs, but other than that one, haven't run into any arm-specific issues. i've had to clamp down cache size to avoid memory exhaustion on the smaller boards, and ran into some corruption due to seemingly a bad interaction between o_direct and zram swap on a particular kernel version, but those aren't problems unique to ceph on arm.

i should also mention that i'm really very tolerant of latency with this cluster, as this is just some homelab garbage running on the cheapest slowest spinning disk available, so there's some bounds on what i'm asserting.

On Tue, Nov 24, 2020 at 11:24 AM <DHilsbos@xxxxxxxxxxxxxx <mailto:DHilsbos@xxxxxxxxxxxxxx>> wrote:

    Adrian;

    I've always considered the advantage of ARM to be the reduction in
    the failure domain.  Instead of one server with 2 processors, and
    2 power supplies, in 1 case, running 48 disks, you can do  4 cases
    containing 8 power supplies, and 32 processors running 32 (or
    64...) disks.

    The architecture is different with ARM; you pair an ARM SoC up
    with just one or 2 disks, and you only run the OSD software.

    Thank you,

    Dominic L. Hilsbos, MBA
    Director – Information Technology
    Perform Air International Inc.
    DHilsbos@xxxxxxxxxxxxxx
    www.PerformAir.com <http://www.PerformAir.com>


    -----Original Message-----
    From: Robert Sander [mailto:r.sander@xxxxxxxxxxxxxxxxxxx
    <mailto:r.sander@xxxxxxxxxxxxxxxxxxx>]
    Sent: Tuesday, November 24, 2020 5:56 AM
    To: ceph-users@xxxxxxx <mailto:ceph-users@xxxxxxx>
    Subject:  Re: Ceph on ARM ?

    Am 24.11.20 um 13:12 schrieb Adrian Nicolae:

    >     Has anyone tested Ceph in such scenario ?  Is the Ceph software
    > really optimised for the ARM architecture ?

    Personally I have not run Ceph on ARM, but there are companies
    selling such setups:

    https://softiron.com/ <https://softiron.com/>
    https://www.ambedded.com.tw/ <https://www.ambedded.com.tw/>

    Regards
    --
    Robert Sander
    Heinlein Support GmbH
    Schwedter Str. 8/9b, 10119 Berlin

    http://www.heinlein-support.de <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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