@vger.kernel.org; Sage Weil
Subject: Re: Read ahead affect Ceph read performance much
On 07/29/2013 05:24 AM, Li Wang wrote:
We performed Iozone read test on a 32-node HPC server. Regarding the
hardware of each node, the CPU is very powerful, so does the network,
with a bandwidth 1.5 GB/s. 64GB memory
: Monday, July 29, 2013 10:49 PM
To: Li Wang
Cc: ceph-devel@vger.kernel.org; Sage Weil
Subject: Re: Read ahead affect Ceph read performance much
On 07/29/2013 05:24 AM, Li Wang wrote:
We performed Iozone read test on a 32-node HPC server. Regarding the
hardware of each node, the CPU is very powerful
We performed Iozone read test on a 32-node HPC server. Regarding the
hardware of each node, the CPU is very powerful, so does the network,
with a bandwidth 1.5 GB/s. 64GB memory, the IO is relatively slow, the
throughput measured by ‘dd’ locally is around 70MB/s. We configured a
Ceph cluster
Wow, very glad to hear that. I tried with the regular FS tunable and
there was almost no effect on the regular test, so I thought that
reads cannot be improved at all in this direction.
On Mon, Jul 29, 2013 at 2:24 PM, Li Wang liw...@ubuntukylin.com wrote:
We performed Iozone read test on a
On 07/29/2013 05:24 AM, Li Wang wrote:
We performed Iozone read test on a 32-node HPC server. Regarding the
hardware of each node, the CPU is very powerful, so does the network,
with a bandwidth 1.5 GB/s. 64GB memory, the IO is relatively slow, the
throughput measured by ‘dd’ locally is around
