On Fri, May 18, 2018 at 3:25 PM, Donald "Mac" McCarthy
wrote:
> Ilya,
> Your recommendation worked beautifully. Thank you!
>
> Is this something that is expected behavior or is this something that should
> be filed as a bug.
>
> I ask because I have just enough experience with ceph at this poi
Ilya,
Your recommendation worked beautifully. Thank you!
Is this something that is expected behavior or is this something that should be
filed as a bug.
I ask because I have just enough experience with ceph at this point to be very
dangerous and not enough history to know if this was expecte
On Wed, May 16, 2018 at 8:27 PM, Donald "Mac" McCarthy
wrote:
> CephFS. 8 core atom C2758, 16 GB ram, 256GB ssd, 2.5 GB NIC (supermicro
> microblade node).
>
> Read test:
> dd if=/ceph/1GB.test of=/dev/null bs=1M
Yup, looks like a kcephfs regression. The performance of the above
command is hig
Dan,
You are correct, that is some important information. I am using the kernel
client. Mounts from fstab.
Mac
Please excuse any typos. Autocorrect is evil!
> On May 17, 2018, at 08:30, Dan van der Ster wrote:
>
> Hi,
>
> It still isn't clear if you're using the fuse or kernel client.
Hi,
It still isn't clear if you're using the fuse or kernel client.
Do you `mount -t ceph` or something else?
-- Dan
On Wed, May 16, 2018 at 8:28 PM Donald "Mac" McCarthy
wrote:
> CephFS. 8 core atom C2758, 16 GB ram, 256GB ssd, 2.5 GB NIC (supermicro
microblade node).
> Read test:
> dd if
CephFS. 8 core atom C2758, 16 GB ram, 256GB ssd, 2.5 GB NIC (supermicro
microblade node).
Read test:
dd if=/ceph/1GB.test of=/dev/null bs=1M
Write
dd if=/dev/zero of=/ceph/out.test bs=1M count=1024
The tests are identical on both kernels - the results... well that is a
different story.
CEPH
What is your client (librbd, krbd, CephFS, ceph-client, ...) and how
are you testing performance?
On Wed, May 16, 2018 at 11:14 AM, Donald "Mac" McCarthy
wrote:
> Recently upgraded a CEPH client to CentOS 7.5. Upon doing so read and write
> performance became intolerably slow. ~2.5 MB/s. When
Recently upgraded a CEPH client to CentOS 7.5. Upon doing so read and write
performance became intolerably slow. ~2.5 MB/s. When booted back to a CentOS
7.4 kernel, performance went back to a normal 200 MB/s read and write. I have
not seen any mention of this issue in all of the normal places
