CIFS performance is significantly lower than NFS in IBM PowerPC

Solution Unverified - Updated -

Issue

  • CIFS performance is significantly lower than NFS in IBM PowerPC. This issue does not occur in Intel x86_64.
# dd if=/mnt/nfs/testfile of=/dev/null bs=1M
5120+0 records in
5120+0 records out
5368709120 bytes (5.4 GB) copied, 47.4146 s, 113 MB/s
# dd if=/mnt/cifs/testfile of=/dev/null bs=1M
5120+0 records in
5120+0 records out
5368709120 bytes (5.4 GB) copied, 790.501 s, 6.8 MB/s

Environment

  • Red Hat Enterprise Linux 7
  • ppc64 and ppc64le
  • CIFS client

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