ThanQ Atul
I have done the following test, According to the below test, it reaching
1869.74 MB/sec.
This is the command I used for benchmarking.
# mpiexec -machinefile machs1 -np 1024 IOR -N 1024 -a MPIIO -t 1024K -b 1G -F
-v -o /mnt/file1
Max Write: 421.31 MiB/sec (441.77 MB/sec)
Max Read: 1029.68 MiB/sec (1079.70 MB/sec)
***
1. In the aboove command I used MPIIO with 1024 process, I got the almost same
result when I fired same command with 512 process
2. I tested with stripe and without stripe with both the apis MPIIO and POSIX
**
node0:~ # ib_write_bw
------------------------------------------------------------------
RDMA_Write BW Test
Number of qp's running 1
Connection type : RC
Each Qp will post up to 100 messages each time
Inline data is used up to 1 bytes message
local address: LID 0x100, QPN 0x28004e, PSN 0xc17c83 RKey 0x8002d00 VAddr
0x002b5fd9964000
remote address: LID 0x101, QPN 0x240051, PSN 0x5e61e, RKey 0x8002d00 VAddr
0x002ae797667000
Mtu : 2048
------------------------------------------------------------------
#bytes #iterations BW peak[MB/sec] BW average[MB/sec]
node0:~ #
node1:~ # ib_write_bw node0
------------------------------------------------------------------
RDMA_Write BW Test
Number of qp's running 1
Connection type : RC
Each Qp will post up to 100 messages each time
Inline data is used up to 1 bytes message
local address: LID 0x101, QPN 0x240051, PSN 0x5e61e RKey 0x8002d00 VAddr
0x002ae797667000
remote address: LID 0x100, QPN 0x28004e, PSN 0xc17c83, RKey 0x8002d00 VAddr
0x002b5fd9964000
Mtu : 2048
------------------------------------------------------------------
#bytes #iterations BW peak[MB/sec] BW average[MB/sec]
65536 5000 1869.76 1869.74
------------------------------------------------------------------
node1:~ #
Date: Thu, 31 Dec 2009 17:43:44 +1100
From: [email protected]
Subject: Re: [Lustre-discuss] max write speed of QDR HCA card
To: [email protected]
CC: [email protected]
Hi Lakshmana,
You can use standard ofed tools like ib_rdma_bw to check Infiniband bandwidth
between pair of nodes.
Lustre provides lnet selftest tool for measuring IB bandwidth between pair or
group of nodes. Check lustre manual for how tos.
Finally, can you post IOR parameters you are using?
Cheers,
Atul
Sent from my iPhone
On Dec 31, 2009, at 5:13 PM, lakshmana swamy <[email protected]> wrote:
Dear All,
Whats the maximum write speed can be achieved with Infiniband QDR HCA card.
The Question arised from my lustre setup where Iam not able to exceed 500MB/s
(write speed) with two OSSs and one MDS
Each OSS has four OSTs and one HCA card. I would like to know which is the
bottleneck here.
I have been using IOR for benchmarking
Thank you
LakshmaN
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