doc/spool.texi

   1 @node Spool
   2 @unnumbered Spool directory
   3
   4 Spool directory holds @ref{Encrypted, encrypted packets} received from
   5 remote nodes and queued for sending to them. It has the following
   6 example structure:
   7
   8 @verbatim
   9 spool/tmp/
  10 spool/2WHB...OABQ/rx.lock
  11 spool/2WHB...OABQ/rx/5ZIB...UMKW.part
  12 spool/2WHB...OABQ/tx.lock
  13 spool/BYRR...CG6Q/rx.lock
  14 spool/BYRR...CG6Q/rx/
  15 spool/BYRR...CG6Q/tx.lock
  16 spool/BYRR...CG6Q/tx/AQUT...DGNT.seen
  17 spool/BYRR...CG6Q/tx/NSYY...ZUU6
  18 spool/BYRR...CG6Q/tx/VCSR...3VXX.seen
  19 spool/BYRR...CG6Q/tx/ZI5U...5RRQ
  20 @end verbatim
  21
  22 Except for @file{tmp}, all other directories are Base32-encoded node
  23 identifiers (@file{2WHB...OABQ}, @file{BYRR...CG6Q} in our example).
  24 Each node subdirectory has @file{rx} (received, partly received and
  25 currently unprocessed packets) and @file{tx} (for outbound packets)
  26 directories.
  27
  28 Each @file{rx}/@file{tx} directory contains one file per encrypted
  29 packet. Its filename is Base32 encoded BLAKE2b hash of the contents. So
  30 it can be integrity checked at any time. @file{5ZIB...UMKW.part} is
  31 partly received file from @file{2WHB...OABQ} node. @file{tx} directory
  32 can not contain partly written files -- they are moved atomically from
  33 @file{tmp}.
  34
  35 When @ref{nncp-toss} utility is called with @option{-seen} option, it
  36 will create empty @file{XXX.seen} files, telling that some kind of
  37 packet was already tossed sometime.
  38
  39 Only one process can work with @file{rx}/@file{tx} directories at once,
  40 so there are corresponding lock files.