Re: Is there a limit for object size in CephFS?

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On Sun, Aug 9, 2015 at 8:57 AM, Hadi Montakhabi <hadi@xxxxxxxxx> wrote:

I am using fio.
I use the kernel module to Mount CephFS.


please send fio job file to us

 
On Aug 8, 2015 10:52 AM, "Ketor D" <d.ketor@xxxxxxxxx> wrote:
Hi Haidi,
      Which bench tool do you use? And how you mount CephFS, ceph-fuse or kernel-cephfs?

On Fri, Aug 7, 2015 at 11:50 PM, Hadi Montakhabi <hadi@xxxxxxxxx> wrote:
Hello Cephers,

I am benchmarking CephFS. In one of my experiments, I change the object size.
I start from 64kb. Everytime I do different block size reads and writes.
By increasing the object size to 64MB and increasing the block size to 64MB, CephFS crashes (shown in the chart below). What I mean by crash is when I do "ceph -s" or "ceph -w" it gets into constantly reporting me reads, but it never finishes the operation (even after a few days!).
I have repeated this experiment for different underlying file systems (xfs and btrfs), and the same thing happens in both cases.
What could be the reason for crashing CephFS? Is there a limit for object size in CephFS?

Thank you,
Hadi

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