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Linux clients using SMBv3 share report slow performance

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ontap-9
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perf
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Applies to

  • ONTAP 9
  • SMB/CIFS
  • Samba
  • Linux

Issue

  • Slow performance reported by Linux client when copying data from CIFS share to client's local storage
  • vserver cifs option "-is-large-mtu-enabled" is enabled 
  • In the mount point details you can see the difference in rsize and wsize of nfsv4 share and the CIFS v3 share below. It is negotiating with 1MB for CIFS volume and 64KB for NFSv4 volume

< IP Address >:/nfs_share on /net/cicd type nfs4 (rw,relatime,vers=4.1,rsize=65536,wsize=65536,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=< IP Address >,local_lock=none,addr=< IP Address >)

//< IP Address >/cifs_share on /net/release type cifs (rw,relatime,vers=3.0,sec=ntlmv2,cache=strict,username=svc.eng nfs,uid=1001,forceuid,gid=1001,forcegid,addr=< IP Address >,file_mode=0755,dir_mode=0755,soft,persistenthandles,nounix,mapposix,rsize=1048576,wsize=1048576,bsize=1048576,echo_interval=60,actimeo=1)

 

 

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