Old Content
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[NOTE]
This initial list combines some actual message names or types with the
POSIX semantic operations they are being used to implement, as well as
a few other underlying mechanisms (cf. "grant"). A subsequent
refinement will separate the various items and relate them to one
another.

Client-MDS RPCs for POSIX namespace operations
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

'Content to be provided'

=== mount ===

'Content to be provided'

=== unmount ===

'Content to be provided'

=== create ===

'Content to be provided'

=== open ===

'Content to be provided'

=== close ===

'Content to be provided'

=== unlink ===

'Content to be provided'

=== mkdir ===

image:mkdir1.png[mkdir]

=== rmdir ===

'Content to be provided'

=== rename ===

'Content to be provided'

=== link ===

'Content to be provided'

=== symlink ===

'Content to be provided'

=== getattr ===

'Content to be provided'

=== setattr ===

'Content to be provided'

=== statfs ===

'Content to be provided'

=== ... ===

'Content to be provided'


Client-MDS RPCs for internal state management
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

'Content to be provided'

=== connect ===

'Content to be provided'

=== disconnect ===

'Content to be provided'

=== FLD ===

'Content to be provided'

=== SEQ ===

'Content to be provided'

=== PING ===

'Content to be provided'

=== LDLM ===

'Content to be provided'

=== ... ===

'Content to be provided'

Client-OSS RPCs for IO Operations
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

'Content to be provided'

=== read ===

'Content to be provided'

=== write ===

'Content to be provided'

=== truncate ===

'Content to be provided'

=== setattr ===

'Content to be provided'

=== grant ===

'Content to be provided'

=== ... ===

'Content to be provided'

MDS-OSS RPCs for internal state management
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

'Content to be provided'

=== object precreation ===

'Content to be provided'

=== orphan recovery ===

'Content to be provided'

=== UID/GID change ===

'Content to be provided'

=== unlink ===

'Content to be provided'

=== ... ===

'Content to be provided'

MDS-OSS RPCs for quota management
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

'Content to be provided'


MDS-OSS OUT RPCs for distributed updates
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

'Content to be provided'

=== DNE1 remote directories ===

'Content to be provided'

=== DNE2 striped directories ===

'Content to be provided'

=== LFSCK2/3 verification and repair ===

'Content to be provided'

Message Flows
-------------

  Each file operation (in Lustre) generates a set of messages in a
  particular sequence. There is one sequence for any particular
  concrete operation, but under varying circumstances the same file
  operation may generate a different sequence.

State Machines
--------------

  For each File operation, the collection of possible sequences of
  messages is governed by a state machine.