AIX

Hi experts,
I used command(dd) to test the performance of an AIX client connecting to a storage device over NFS.During the test, the IOPS and bandwidth are 0. However, replacing the linux client does not cause this problem.

Leo,
it would be helpful to share the command with all parameters you are using in this test.
How are you monitoring IO?
NFS is a cached file system, so your test, and while you monitored, may have just hit the local cache?

Hi experts,
I used command(dd) to test the performance of an AIX client connecting to a storage device over NFS.During the test, the IOPS and bandwidth are 0. However, replacing the linux client does not cause this problem.

Hi,
The command parameters are as follows,
                                    dd if=/dev/zero of=/mnt/data bs=1M

I used 'topas' to check the network port bandwidth on AIX client and found that the bandwidth was zero.
I also thought it might be a local cache issue, but with other storage devices the situation was different.I was wondering if there are any NFS server parameters to control the local caching on the client side?

Leo,
it would be helpful to share the command with all parameters you are using in this test.
How are you monitoring IO?
NFS is a cached file system, so your test, and while you monitored, may have just hit the local cache?

Hi experts,
I used command(dd) to test the performance of an AIX client connecting to a storage device over NFS.During the test, the IOPS and bandwidth are 0. However, replacing the linux client does not cause this problem.

Hi Leo

Are small IO operations successful? Such as touching a file, or copying a small file?
It may be a jumbo frame issue if small IO is ok, but large IO is getting blocked.

Hi,
The command parameters are as follows,
                                    dd if=/dev/zero of=/mnt/data bs=1M

I used 'topas' to check the network port bandwidth on AIX client and found that the bandwidth was zero.
I also thought it might be a local cache issue, but with other storage devices the situation was different.I was wondering if there are any NFS server parameters to control the local caching on the client side?

Leo,
it would be helpful to share the command with all parameters you are using in this test.
How are you monitoring IO?
NFS is a cached file system, so your test, and while you monitored, may have just hit the local cache?

Hi experts,
I used command(dd) to test the performance of an AIX client connecting to a storage device over NFS.During the test, the IOPS and bandwidth are 0. However, replacing the linux client does not cause this problem.

I tried small IO operations that also caused the problem.
The command parameters are as follows,
                                    dd if=/dev/zero of=/mnt/data bs=8k

Hi Leo

Are small IO operations successful? Such as touching a file, or copying a small file?
It may be a jumbo frame issue if small IO is ok, but large IO is getting blocked.

Hi,
The command parameters are as follows,
                                    dd if=/dev/zero of=/mnt/data bs=1M

I used 'topas' to check the network port bandwidth on AIX client and found that the bandwidth was zero.
I also thought it might be a local cache issue, but with other storage devices the situation was different.I was wondering if there are any NFS server parameters to control the local caching on the client side?

Leo,
it would be helpful to share the command with all parameters you are using in this test.
How are you monitoring IO?
NFS is a cached file system, so your test, and while you monitored, may have just hit the local cache?

Hi experts,
I used command(dd) to test the performance of an AIX client connecting to a storage device over NFS.During the test, the IOPS and bandwidth are 0. However, replacing the linux client does not cause this problem.

I tried small IO operations that also caused the problem.
The command parameters are as follows,
                                    dd if=/dev/zero of=/mnt/data bs=8k

Hi Leo

Are small IO operations successful? Such as touching a file, or copying a small file?
It may be a jumbo frame issue if small IO is ok, but large IO is getting blocked.

Hi,
The command parameters are as follows,
                                    dd if=/dev/zero of=/mnt/data bs=1M

I used 'topas' to check the network port bandwidth on AIX client and found that the bandwidth was zero.
I also thought it might be a local cache issue, but with other storage devices the situation was different.I was wondering if there are any NFS server parameters to control the local caching on the client side?

Leo,
it would be helpful to share the command with all parameters you are using in this test.
How are you monitoring IO?
NFS is a cached file system, so your test, and while you monitored, may have just hit the local cache?

Hi experts,
I used command(dd) to test the performance of an AIX client connecting to a storage device over NFS.During the test, the IOPS and bandwidth are 0. However, replacing the linux client does not cause this problem.