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tcpip_nfs_-_how_large_of_a_file_can_my_nfs_server_or_client_handle

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tcpip_nfs_-_how_large_of_a_file_can_my_nfs_server_or_client_handle [2019/02/08 23:40] mmacgregortcpip_nfs_-_how_large_of_a_file_can_my_nfs_server_or_client_handle [2019/02/11 19:50] mmacgregor
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 ===== Details ===== ===== Details =====
  
-The answer depends on which IP stack you are running on your OpenVMS machine and which version of Network File System (NFS) is installed.  2 gigabytes was a major power of 2 boundary for almost all of the IP stacks.  NFS v2 had that limitation.  NFS v3 allowed files to exceed 2 GB and typically that meant it is now capable of up to 4 GB in size.  However, each vendor implemented this in different ways (ie, perhaps Server only and not the Client).  So here is the information that we've been able to track down for each vendor.+The answer depends on which IP stack you are running on your OpenVMS machine and which version of Network File System (NFS) is installed.  2 gigabytes was a major power of 2 boundary for almost all of the IP stacks.  NFS v2 had that limitation because it only used 32 bits.  Since one of the bits was signed, that means 2^31 power or 2,147,483,648 bytes.  NFS v3 allowed files to exceed 2 GB because it utilized 64 bits of space.  However, each vendor implemented this in different ways (ie, perhaps Server only and not the Client).  So here is the information that we've been able to track down for each vendor.
  
 **TCPware:** **TCPware:**
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 Here there are three different answers.   Here there are three different answers.  
  
-Prior to version 5.(including the UCX versions), only the NFS v2 was available.  Thus, that was a 2 GB limit.+Prior to version 5.(including the UCX versions), only the NFS v2 was available.  Thus, that was a 2 GB limit.
  
-Starting in version 5.through TCPIP V5.7 ECO 1, the NFS Server could be v3, but the NFS client could only be v2.  Meaning that the client had a 2 GB limit while the server did not.+Starting in version 5.through TCPIP V5.7 ECO 1, the NFS Server could be v3, but the NFS client could only be v2.  Meaning that the client had a 2 GB limit while the server did not.
  
 Starting in version 5.7 ECO 2, the NFS v3 client was available.  So it is possible to exceed the 2 GB limit now. Starting in version 5.7 ECO 2, the NFS v3 client was available.  So it is possible to exceed the 2 GB limit now.
tcpip_nfs_-_how_large_of_a_file_can_my_nfs_server_or_client_handle.txt · Last modified: 2019/02/11 19:56 by mmacgregor

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