Hi Guys,
The striping seems to be slightly better than non-striping write, given
that my storage is configured with 4OSS, and 48OSD. each OSD is 8+2 Raid 6
of 24TB capacity.
But still the performance is around 100MB/sec. On a single haswell core,
I'm able to get 1GB/sec with dd buffered IO.
My qu
Thanks Kefu.
Best,
Jialin
NERSC
On Tue, May 29, 2018 at 11:52 PM, kefu chai wrote:
> On Wed, May 30, 2018 at 11:53 AM, Jialin Liu wrote:
> > Hi Brad,
> >
> > You are correct. the librados.so has the symbol but what I copied is a
> wrong
> > file.
> > Now I can test the striper api with the pre
On Wed, May 30, 2018 at 11:53 AM, Jialin Liu wrote:
> Hi Brad,
>
> You are correct. the librados.so has the symbol but what I copied is a wrong
> file.
> Now I can test the striper api with the previous C example and this cpp
> example:
> http://mrbojangles3.github.io/ceph/systems/striping/alignme
Hi Brad,
You are correct. the librados.so has the symbol but what I copied is a
wrong file.
Now I can test the striper api with the previous C example and this cpp
example:
http://mrbojangles3.github.io/ceph/systems/striping/alignment/2017/05/28/Ceph-Stripe/
Both are working, but I haven't got any
On Wed, May 30, 2018 at 11:52 AM, Jialin Liu wrote:
> Thanks Brad,
> I run nm on those .so file, it prints 'no symbol'
OK, well you need to link to a library that exports that symbol (has
it defined in its Text section). I suspect you'll find it is defined
in libceph-common.so so try linking to t
Thanks Brad,
I run nm on those .so file, it prints 'no symbol'
Then with ldd librados.so, I don't see the libceph-common.so, instead:
> jialin@cori12: ldd librados.so
> linux-vdso.so.1 (0x2aacf000)
> libboost_thread-mt.so.1.53.0
> =>/rados_install/lib/libboost_thread-mt.so.1.53.0
On Wed, May 30, 2018 at 10:42 AM, Jialin Liu wrote:
> Hi,
> I'm trying to use the libradosstriper api, but having some trouble in
> linking to lradosstriper. I copied only the `required' libraries from an
> pre-installed ceph (10.2.10), and put them under my local directory
> /rados_install/lib an
Hi,
I'm trying to use the libradosstriper api, but having some trouble in
linking to lradosstriper. I copied only the `required' libraries from an
pre-installed ceph (10.2.10), and put them under my local directory
/rados_install/lib and rados_install/include, on a linux machine.
*/rados_install/l
