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: -
1: -
2: new session ID
3: (key)|(val) - create and update DATA or (key) only for delete key
key && val in format: [length (int64)][gob data bytes with this length]


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