🚀 go-pugleaf

In article <1991May27.170212.18590@convex.com>, hamrick@convex.com (Ed Hamrick) writes:
%% We recently ported the UniTree file migration package to the CONVEX
%% platform, and ran across some NFS issues.  UniTree supports files > 2 GBytes
%% in length, but NFS is limited to files of 2^31-1 bytes (32 bit int field).
%% 
%% We've modified UniTree to allow access to large files (> 2 GBytes) using NFS
%% by always reporting a file length less than 2 GBytes, even when the file is
%% larger than this.  This allows access to the first 2 GBytes of large files,
%% as well as allowing users to use standard file manipulation commands such as
%% ls -l, mv, rm, etc.
%% 
...
%% 
%% I've had the best experiences using NFS block sizes of 512 bytes, as some
%% NFS clients assume this (du utility for instance).  An NFS client should use
%% whatever block size the server reports.
%% 

For a 2Gb file, a 512 byte buffer would mean 4M read operations (RPC requests). Assuming 2 ms for each RPC it would take more than 2 hours to read a whole file whereas with 8kb buffers it would take 8 minutes.
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        ______
       /     /                          
      /_____/_           ___         Paulo Amaral
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