Difference between revisions of "Mount a remote nfs share"

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Mounting using hostname instead of IP address can solve some of errors reported in this page
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 +
 
  [[mount -t nfs]] -o proto=tcp,port=2049 REMOTE_IP_SERVER:/REMOTE_SHARE_DIR /YOUR/LOCAL_DIR/
 
  [[mount -t nfs]] -o proto=tcp,port=2049 REMOTE_IP_SERVER:/REMOTE_SHARE_DIR /YOUR/LOCAL_DIR/
 
   
 
   
−
  mount -t nfs4 10.10.10.2:/ ./
+
  [[mount -t nfs4]] 10.10.10.2:/ ./
 
  mount: /mnt: bad option; for several filesystems (e.g. nfs, cifs) you might need a /sbin/mount.<type> helper program
 
  mount: /mnt: bad option; for several filesystems (e.g. nfs, cifs) you might need a /sbin/mount.<type> helper program
 
  (Install client: <code> apt-get install [[nfs-common]]</code>)
 
  (Install client: <code> apt-get install [[nfs-common]]</code>)
  
 
  mount.[[nfs4]]: requested NFS version or transport protocol is not supported
 
  mount.[[nfs4]]: requested NFS version or transport protocol is not supported
 +
 +
Solution: Try to mount it using hostname instead of IP
  
 
  mount.nfs: [[portmap]] query retrying: [[RPC]]: Program not registered
 
  mount.nfs: [[portmap]] query retrying: [[RPC]]: Program not registered
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  Apr 22 09:28:34 your_hostname kernel: RPC: Registered named UNIX socket transport module.
 
  Apr 22 09:28:34 your_hostname kernel: RPC: Registered named UNIX socket transport module.
 
  Apr 22 09:28:34 your_hostname kernel: FS-Cache: Loaded
 
  Apr 22 09:28:34 your_hostname kernel: FS-Cache: Loaded
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 +
== Activities ==
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* Read about EFS performance settings https://docs.aws.amazon.com/efs/latest/ug/performance.html#performance-tips
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Don't use the following mount options:
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* <code>[[noac]], [[actimeo]]=0, [[acregmax]]=0, [[acdirmax]]=0</code> – These options disable the attribute cache, which has a very large performance impact.
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* <code>[[lookupcache]]=pos, [[lookupcache]]=none</code> – These options disable the file name lookup cache, which has a very large impact on performance.
 +
* <code>[[fsc]]</code> – This option enables local file caching, but does not change NFS cache coherency, and does not reduce latencies.
  
 
== Related terms ==
 
== Related terms ==
 +
* <code>[[exportfs]]</code> List exported filesystems
 
* <code>[[mount]]</code>
 
* <code>[[mount]]</code>
 
* [[RPC]]
 
* [[RPC]]
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== See also ==
 
== See also ==
 +
* {{mount}}
 
* {{NFS}}
 
* {{NFS}}
  
  
 
[[Category:Computing]]
 
[[Category:Computing]]

Latest revision as of 06:43, 25 May 2023

Mounting using hostname instead of IP address can solve some of errors reported in this page



mount -t nfs -o proto=tcp,port=2049 REMOTE_IP_SERVER:/REMOTE_SHARE_DIR /YOUR/LOCAL_DIR/

mount -t nfs4 10.10.10.2:/ ./
mount: /mnt: bad option; for several filesystems (e.g. nfs, cifs) you might need a /sbin/mount.<type> helper program
(Install client:  apt-get install nfs-common)

mount.nfs4: requested NFS version or transport protocol is not supported

Solution: Try to mount it using hostname instead of IP

mount.nfs: portmap query retrying: RPC: Program not registered

mount -v -t nfs4 10.10.10.2:/ ./
mount.nfs4: timeout set for Wed Apr 22 09:55:59 2020
mount.nfs4: trying text-based options 'vers=4.2,addr=0.10.10.22:,clientaddr=10.10.10.2:'
mount.nfs4: mount(2): No route to host



mount -v -t nfs -o vers=3,timeo=600,noresvport,nolock  10.10.10.2:/ /local/path

Logs[edit]

Apr 22 09:28:34 your_hostname kernel: Key type id_legacy registered
Apr 22 09:28:34 your_hostname kernel: Key type id_resolver registered
Apr 22 09:28:34 your_hostname kernel: NFS: Registering the id_resolver key type
Apr 22 09:28:34 your_hostname kernel: FS-Cache: Netfs 'nfs' registered for caching
Apr 22 09:28:34 your_hostname kernel: RPC: Registered tcp NFSv4.1 backchannel transport module.
Apr 22 09:28:34 your_hostname kernel: RPC: Registered tcp transport module.
Apr 22 09:28:34 your_hostname kernel: RPC: Registered udp transport module.
Apr 22 09:28:34 your_hostname kernel: RPC: Registered named UNIX socket transport module.
Apr 22 09:28:34 your_hostname kernel: FS-Cache: Loaded

Activities[edit]

Don't use the following mount options:

  • noac, actimeo=0, acregmax=0, acdirmax=0 – These options disable the attribute cache, which has a very large performance impact.
  • lookupcache=pos, lookupcache=none – These options disable the file name lookup cache, which has a very large impact on performance.
  • fsc – This option enables local file caching, but does not change NFS cache coherency, and does not reduce latencies.

Related terms[edit]

See also[edit]

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