Fix part of FileSet restore problem

[bacula/bacula] / bacula / kernstodo

                 Kern's ToDo List
                  20 August 2002

Irix conversion notes:
- no uuencode
- no hostname
To do:    
- Document passwords.
- Document running multiple Jobs
- Document that two Verifys at same time on same client do not work.
- Document how to recycle a tape in 7 days even if the backup takes a long time.
- Document default config file locations.
- Document better includes (does it cross file systems ?).
- Document specifically how to add new File daemon to config files.
- Document forcing a new tape to be used.
- Document "Error in message.c:500 Mail program terminated in error.

From Chuck:
--bindir is wrong and does not reflect prefix= in the *_sqlite_* scripts
  (src/cats)
--top level configure options are not passed to the depkgs, particularly
  prefix=
--Also, it might be better to split the depkgs location from the --with-sqlite
  location. 
--should be able to specify e.g. --with-sqlite=/opt/local and have it find
  lib, bin, sbin for itself
  I tried this and it didn't find sqlite.h
--sd.conf password does not match dir.conf storage password
=======

- Fix db_update_fileset in cats/sql_get.c
- Fix start/end blocks for File
- Add new code to scheduler.c and run_conf.c
- Problem with len at 362 in tree.c
- Volume Bytes shows bytes on last volume written in Job summary.
- Fix catalog filename truncation in sql_get and sql_create. Use
  only a single filename split routine.
- Add command to reset VolFiles to a larger value (don't allow
  a smaller number or print big warning).
- Make SD disallow writing on Volume with fewer files than in
  the catalog.
- Make Restore report an error if FD or SD term codes are not OK.
- Convert all %x substitution variables, which are hard to remember
  and read to %(variable-name)s.  Idea from TMDA.
- Report volume write rate.
- Report compression % and other compression statistics if turned on.
- Add JobLevel in FD status (but make sure it is defined).
- Pass "Catalog Files = no" to storage daemon to eliminate
  network traffic.
- Make Pool resource handle Counter resources.
- Remove NextId for SQLite. Optimize.
- Fix gethostbyname() to use gethostbyname_r()
- Implement ./configure --with-client-only
- Strip trailing / from Include
- Move all SQL statements into a single location.
- Cleanup db_update_media and db_update_pool
- Add UA rc and history files.
- put termcap (used by console) in ./configure and
  allow -with-termcap-dir.
- Remove JobMediaId it is not used.
- Enhance time and size scanning routines.
- Fix Autoprune for Volumes to respect need for full save.
- DateWritten may be wrong.
- Fix Win32 config file definition name on /install
- When we are at EOM, we must ask each job to write JobMedia
  record (update_volume_info).
- No READLINE_SRC if found in alternate directory.
- Add Client FS/OS id (Linux, Win95/98, ...).
- Put Windows files in Windows stream?
- Ensure that everyone uses btime routines.

  
Projects:
- Add Base job.
- Make Storage daemon multi-buffer to tape (i.e. writer thread).
- Implement Label templates
- Define definitive tape format.
- GUI for interactive restore.
- Interactive backup.
- Write bscan program (skeleton exists).
- Write a regression script
- Add ssl to daemon communications
- New daemon communications protocol.
- SD can buffer to disk.

1.  Implement Base jobs.
    Big savings in tape usage. Will require more resources.
    i.e. DIR must send FD a list of files/attribs, and the FD must
    search the list and compare it for each file to be saved.

2.  Make Storage daemon multi-buffer to tape (i.e. writer thread).
    Hopefully much faster backups. Each Job will have a pool of
    buffers that it hands off to the tape writer thread. 

3.  Implement Label templates
    Better automated label creation, using design that is
    already documented in the manual.

4.  Define definitive tape format.
    A lot of design thought needed here.
    
5.  GUI for interactive restore.
    Probably will do in Gtk, but would be nice in Browser.

6.  Interactive backup.
    Really part of 5.

7.  Write bscan program (skeleton exists).
    Allows recovery from tape.

8.  Write a regression script
    Needed to ensure long term stability.

9.  Add ssl to daemon communications
    Needed for secure operations.

10. Multiple simultaneous Jobs.
    I don't think this will take much.

11. New daemon communication protocol. 
    Use serial for all daemon communications, allow transfer
    of any data type with type checking and optional name
    checking.

12. SD can use intermediate file storage to buffer data
    while waiting for tape to catch up.  This requires that
    item 2 be implemented (or simultaneously implemented).

I haven't put these in any particular order.

Small projects:
- Rework Storage daemon with new rwl_lock routines.
- Compare tape to Client files (attributes, or attributes and data) 
- Restore options (overwrite, overwrite if older,
   overwrite if newer, never overwrite, ...)
- Restore to a particular time -- e.g. before date, after date. 
- On command write out a bootstrap file (at end of job).
- Make all database Ids 64 bit.
- Pass JCR to database routines permitting better error printing.
- Make bls accept bootstrap record.
- Write an applet for Linux.
- Make SD reject writing on tape where Catalog and tape # files
  don't agree (possibly OK if tape > catalog).
- Implement new daemon communications protocol.
- Add DIR config directive to spool attributes.
- Pass DIR config variable to SD for no attributes.
- Create JobMedia record for all running Jobs when Media changes.
- Send Volumes needed during restore to Console (just after
  create_volume_list) -- also in restore command?
- Add estimate to Console commands
- Find solution to blank filename (i.e. path only) problem.

Dump:
  mysqldump -f  --opt bacula >bacula


To be done:
- Remove PoolId from Job table, it exists in Media.
- Allow console commands to detach or run in background.
- Fix status delay on storage daemon during rewind.
- Add VerNo to each Session label record. 
- Add Job to Session records.
- Add VOLUME_CAT_INFO to the EOS tape record (as
  well as to the EOD record).
- Add SD message variables to control operator wait time
  - Maximum Operator Wait
  - Minimum Message Interval
  - Maximum Message Interval
- Add EOM handling variables
  - Write EOD records
  - Require EOD records
- Send Operator message when cannot read tape label.
- Think about how to handle I/O error on MTEOM.
- If Storage daemon aborts a job, ensure that this
  is printed in the error message.
- Verify level=Volume (scan only), level=Data (compare of data to file).
  Verify level=Catalog, level=InitCatalog
- Dump of Catalog
- Cold start full restore (restore catalog then
  user selects what to restore).  Write summary file containing only
  Job, Media, and Catalog information. Store on another machine.
- Dump/Restore database
- File system type
- Events file
- Add keyword search to show command in Console.
- Fix Win2000 error with no messages during startup.
- Events : tape has more than xxx bytes.
- In Storage daemon, status should include job cancelled.
- Write general list maintenance subroutines.
- Implement immortal format with EDOs. 
- Restrict characters permitted in a Resource name.
- Provide definitive identification of  type in backup.
- Complete  code in Bacula Resources -- this will permit
  reading a new config file at any time.
- Document new Console
- Handle ctl-c in Console
- Test restore of Windows backup
- Implement LabelTemplate (at least first cut).
- Implement script driven addition of File daemon to
  config files.

- Bug: anonymous Volumes requires mount in some cases.
- see setgroup and user for Bacula p4-5 of stunnel.c
- Implement new serialize subroutines
   send(socket, "string", &Vol, "uint32", &i, NULL)
- Add save type to Session label.
- Correct date on Session label.
- On I/O error, write EOF, then try to write again.
- Audit all UA commands to ensure that we always prompt where
  possible.
- If ./btape is called without /dev, assume argument is
  a Storage resource name.
- Put memory utilization in Status output of each daemon
  if full status requested or if some level of debug on.
- Make database type selectable by .conf files i.e. at runtime
- gethostbyname failure in bnet_connect() continues
  generating errors -- should stop.
- Don't create a volume that is already written. I.e. create only once.
- If error at end of tape, implement some way to kill waiting processes.
- Add HOST to Volume label.
- Set flag for uname -a.  Add to Volume label.
- Implement throttled work queue.
- Write bscan program that will syncronize the DB Media record with
  the contents of the Volume -- for use after a crash.
- Check for EOT at ENOSPC or EIO or ENXIO (unix Pc)
- Allow multiple Storage specifications (or multiple names on
  a single Storage specification) in the Job record. Thus a job 
  can be backed up to a number of storage devices.
- Implement full MediaLabel code.
- Implement dump label to UA
- Copy volume using single drive.
- Copy volume with multiple driven (same or different block size).     
- Add block size (min, max) to Vol label.
- Concept of VolumeSet during restore which is a list
  of Volume names needed.
- Restore files modified after date
- Restore file modified before date
- Emergency restore info:
  - Backup Bacula
  - Backup working directory
  - Backup Catalog
- Restore options (do not overwrite)
- Restore -- do nothing but show what would happen
- SET LD_RUN_PATH=$HOME/mysql/lib/mysql
- Put Job statistics in End Session Label (files saved,
  total bytes, start time, ...).     
- Put FileSet name in the SOS label.
- Implement Restore FileSet=
- Write a scanner for the UA (keyword, scan-routine, result, prompt).
- Create a protocol.h and protocol.c where all protocol messages
  are concentrated.
- If SD cannot open a drive, make it periodically retry.
- Put Bacula version somewhere in Job stream, probably Start Session
  Labels.
- Remove duplicate fields from jcr (e.g. jcr.level and
  jcr.jr.Level, ...).
- Timout a job or terminate if link goes down, or reopen link and query.
- Define how we handle times to avoid problem with Unix dates (2049 ?).
- Fill all fields in Vol/Job Header -- ensure that everything
  needed is written to tape. Think about restore to Catalog
  from tape.  Client record needs improving.
- Find general solution for sscanf size problems (as well
  as sprintf. Do at run time?

- Concept of precious tapes (cannot be reused).
- Allow FD to run from inetd ???
- Preprocessing command per file.
- Postprocessing command per file (when restoring).

- Restore should get Device and Pool information from
  job record rather than from config.
- Autolabel should be specified by DR instead of SD.
- Ability to recreate the catalog from a tape.
- Find out how to get the system tape block limits, e.g.:
  Apr 22 21:22:10 polymatou kernel: st1: Block limits 1 - 245760 bytes.  
  Apr 22 21:22:10 polymatou kernel: st0: Block limits 2 - 16777214 bytes.
- Storage daemon    
  - Add media capacity
  - AutoScan (check checksum of tape)
  - Format command = "format /dev/nst0"
  - MaxRewindTime
  - MinRewindTime
  - MaxBufferSize
  - Seek resolution (usually corresponds to buffer size)
  - EODErrorCode=ENOSPC or code
  - Partial Read error code
  - Partial write error code
  - Nonformatted read error
  - Nonformatted write error
  - WriteProtected error
  - IOTimeout
  - OpenRetries
  - OpenTimeout
  - IgnoreCloseErrors=yes
  - Tape=yes
  - NoRewind=yes
- Pool
  - Maxwrites
  - Recycle period
- Job
  - MaxWarnings
  - MaxErrors (job?)
=====
- Eliminate duplicate File records to shrink database.
- FD sends unsaved file list to Director at end of job. 
- Write a Storage daemon that uses pipes and
  standard Unix programs to write to the tape.
  See afbackup.
- Need something that monitors the JCR queue and
  times out jobs by asking the deamons where they are.
- Add daemon JCR JobId=0 to have a daemon context
- Pool resource
  - Auto label
  - Auto media verify
  - Client (list of clients to force client)
  - Devices (list of devices to force device)
  - enable/disable
  - Groups
  - Levels
  - Type: Backup, ...
  - Recycle from other pools: Yes, No
  - Recycle to other pools: Yes, no
  - FileSets
  - MaxBytes?
  - Optional MediaType to force media?
  - Maintain Catalog
  - Label Template
  - Retention Period
  ============
  - Name
  - NumVols
  - NaxVols
  - CurrentVol

=====
  if(connect(sockfd, (struct sockaddr * ) (& addr), sizeof(addr)) .lt. 0){
    close(sockfd);
    return(-6);
  }

  linger.l_onoff = 1;
  linger.l_linger = 60;
  i = setsockopt(sockfd, SOL_SOCKET, SO_LINGER, (char *) &linger,
                                                sizeof (linger));

  fl = fcntl(sockfd, F_GETFL);
  fcntl(sockfd, F_SETFL, fl & (~ O_NONBLOCK) & (~ O_NDELAY));
====
- Enhance Jmsg code to permit buffering and saving to disk.
- device driver = "xxxx" for drives.
- restart: paranoid: read label fsf to
  eom read append block, and go
  super-paranoid: read label, read all files
  in between, read append block, and go
  verify: backspace, read append block, and go
  permissive: same as above but frees drive
  if tape is not valid.
- Verify from Volume
- Ensure that /dev/null works
- File daemon should build list of files skipped, and then
  at end of save retry and report any errors.
- Need report class for messages. Perhaps
  report resource where report=group of messages
- Verify from Tape
- enhance scan_attrib and rename scan_jobtype, and
  fill in code for "since" option 
- To buffer messages, we need associated jobid and Director name.
- Need to save contents of FileSet to tape?
- Director needs a time after which the report status is sent
  anyway -- or better yet, a retry time for the job.
  Don't reschedule a job if previous incarnation is still running.
- Figure out how to save the catalog (possibly a special FileSet).
- Figure out how to restore the catalog.
- Figure out how to put a Volume into the catalog (from the tape)
- Figure out how to do a restore from a Volume
- Some way to automatically backup everything is needed????
- Need a structure for pending actions:
  - buffered messages
  - termination status (part of buffered msgs?)
- Concept of grouping Storage devices and job can use
  any of a number of devices
- Drive management
  Read, Write, Clean, Delete
- Login to Bacula; Bacula users with different permissions:
   owner, group, user
- Tape recycle destination
- Job Schedule Status
  - Automatic
  - Manual
  - Running
- File daemon should pass Director the operating system info
  to be stored in the Client Record (or verified that it has
  not changed).
- Store info on each file system type (probably in the job header on tape.
  This could be the output of df; or perhaps some sort of /etc/mtab record.

Longer term to do:
- Use media 1 time (so that we can do 6 days of incremental
  backups before switching to another tape) (already)
  specify # times (jobs)
  specify bytes (already)
  specify time (seconds, hours, days)
- Implement FSM (File System Modules).
- Identify unchanged or "system" files and save them to a
  special tape thus removing them from the standard 
  backup FileSet -- BASE backup.
- Turn virutally all sprintfs into snprintfs.
- Heartbeat between daemons.
- Audit M_ error codes to ensure they are correct and consistent.
- Add variable break characters to lex analyzer.
  Either a bit mask or a string of chars so that
  the caller can change the break characters.
- Make a single T_BREAK to replace T_COMMA, etc.
- Ensure that File daemon and Storage daemon can
  continue a save if the Director goes down (this
  is NOT currently the case). Must detect socket error,
  buffer messages for later. 


Done: (see kernsdone for more)
--the console script is broken as installed and has to be hand-massaged with
  paths, config files etc.
- Termination status in FD for Verify = C -- incorrect.
- Implement alter_sqlite_tables
- Fix scheduler -- see "Hourly cycle". It doesn't do both each
  hour, rather it alternates between 0:05 and 0:35.
- Create Counter DB records.
- Fix db_get_job_volume_names() to return array of strings (now works
  with pool memory.
- Eliminate MySQL shared libraries from smtp and daemons not using MySQL.
- Compare tape File attributes to Catalog.
  (File attributes are size, dates, MD5, but not
   data).
- Report bad status from smtp or mail program.
- Ensure that Start/End File/Block are correct.
- If MySQL database is not running, job terminates with
  wierd type and wierd error code.
- Probably create a jcr with JobId=0 as a master
  catchall if jcr not found or if operation involves
  global operation.
- The daemons should know when one is already
  running and refuse to run a second copy.
- Figure out how to do a "full" restore from catalog
- Make SD send attribute stream to DR but first
  buffering to file, then sending only when the
  files are written to tape.
- Restore file xx or files xx, yy to their most recent values.
- Get correct block/file information in Catalog, pay attention to change of media.
- Write better dump of Messages resource.
- Authentication between SD and FD