Files from same NFS server show different md5sum on different NFS clients.

Solution Verified - Updated -

Issue

  • Need some advisory tips and deep dive documentation about kernel memory management – file system cache.
  • Request is related to the recent problems that we have had with cached files.
  • When the same file was read from different nfs client we have a different results.
  • After some investigation we noticed that all problem files are in system file cache. But they was in cache all time.
  • These files are archive files from a NFS share , and one problem is that we have some another trouble with recall functionality and some servers have read “wrong” data.

Environment

  • Red Hat Enterprise Linux
  • NFS

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