This is PML format:

[OP]
0: create new session
1: destroy session
2: change session ID (sid)
3: modify (create key, update key: val, delete key) session DATA

[SID] is session ID

[DATA]
0: - no data
1: - no data
2: new session ID
3: (key)|(val) - create and update DATA or (key) only for delete key

PML log file:
______________________________________________________   LOG stream...
OP | SID | DATA | LENGTH  |                           |   |
------------------------------------------------------    |
----- // -- // -- // --   |                           |   |
------------------------------------------------------    |
   ...   ....   .....     |                           |   |
______________________________________________________    |
OP | SID | DATA  | LENGTH |                           |   |
______________________________________________________    V

... LENGTH is uint64 size of record