Cyrus IMAP Server: var directory structure

Directory structure under /var/spool/imap

stage./
  Normal staging directory

sync./
  Staging directory for replication system
  Includes
    sync./locks/*

  which are lock files for each user on the system to prevent two
  replication runs from trying to update the same account at the same time
  (nothing disasterous should happen even without this lock, but the second
  job in will get a bit confused if the target end changes under its feet,
  and will probably drop back to a recovery mode.

user/
  Familiar user.userid space.

Directory structure under /var/imap

Complete list:

  drwxr-xr-x    2 cyrus    cyrus         232 Sep  7 08:21 db
  drwxr-x---    2 cyrus    cyrus         112 Sep  7 19:51 db.backup1
  drwxr-x---    2 cyrus    cyrus         112 Sep  7 19:21 db.backup2
  -rw-r-----    1 cyrus    cyrus    20799488 Sep  7 19:51 deliver.db
  drwxr-xr-x    2 cyrus    cyrus          48 Sep  7 10:16 log
  -rw-r-----    1 cyrus    cyrus     1995000 Sep  7 19:38 mailboxes.db
  -rw-r--r--    1 cyrus    cyrus          10 Jun  2 10:08 master_machine
  -rw-r--r--    1 cyrus    cyrus          71 Sep  7 08:21 master_uuid
  drwxr-xr-x    2 cyrus    cyrus          48 Jun  2 10:08 msg
  drwxr-xr-x    2 cyrus    cyrus        1872 Sep  7 19:55 proc
  drwxr-xr-x   28 cyrus    cyrus         672 Jun  2 10:08 quota
  drwxr-xr-x    2 cyrus    cyrus         224 Sep  7 08:21 socket
  drwxr-xr-x    2 cyrus    cyrus          72 Sep  7 10:19 sync
  drwxr-xr-x   28 cyrus    cyrus         672 Jun  2 10:08 user

Most of that will be familiar. New entries are:

master_machine
  Defines machine number in replication cluster. Used as sanity check
  aginst master_uuid file. Sample content:

    machine=1

master_uuid
  Full information about UUID schema in use. See ./uuid for details.
  Sample content:

     schema=1
     machine=1
     timestamp_generation=0
     master_start_time=1062919294

sync/current
  Transaction log from IMAP, POP and LMTP daemons, typically feed into
  sync_client running as asynchronous replication engine.

  Rotated to be sync/current-<pid> by asychronous runner.