+++ /dev/null
-%%
-%%
-
-\chapter{automatische Volume Wiederverwendung}
-\label{RecyclingChapter}
-\index[general]{Recycling!Automatic Volume }
-\index[general]{Automatic Volume Recycling }
-
-By default, once Bacula starts writing a Volume, it can append to the
-volume, but it will not overwrite the existing data thus destroying it.
-However when Bacula {\bf recycles} a Volume, the Volume becomes available
-for being reused, and Bacula can at some later time overwrite the previous
-contents of that Volume. Thus all previous data will be lost. If the
-Volume is a tape, the tape will be rewritten from the beginning. If the
-Volume is a disk file, the file will be truncated before being rewritten.
-
-You may not want Bacula to automatically recycle (reuse) tapes. This would
-require a large number of tapes though, and in such a case, it is possible
-to manually recycle tapes. For more on manual recycling, see the section
-entitled \ilink{ Manually Recycling Volumes}{manualrecycling} below in this
-chapter.
-
-Most people prefer to have a Pool of tapes that are used for daily backups and
-recycled once a week, another Pool of tapes that are used for Full backups
-once a week and recycled monthly, and finally a Pool of tapes that are used
-once a month and recycled after a year or two. With a scheme like this, the
-number of tapes in your pool or pools remains constant.
-
-By properly defining your Volume Pools with appropriate Retention periods,
-Bacula can manage the recycling (such as defined above) automatically.
-
-Automatic recycling of Volumes is controlled by four records in the {\bf
-Pool} resource definition in the Director's configuration file. These four
-records are:
-
-\begin{itemize}
-\item AutoPrune = yes
-\item VolumeRetention = \lt{}time\gt{}
-\item Recycle = yes
-\item RecyclePool = \lt{}APool\gt{} (\textit{This require bacula 2.1.4 or greater})
-\end{itemize}
-
-The above three directives are all you need assuming that you fill
-each of your Volumes then wait the Volume Retention period before
-reusing them. If you want Bacula to stop using a Volume and recycle
-it before it is full, you will need to use one or more additional
-directives such as:
-\begin{itemize}
-\item Use Volume Once = yes
-\item Volume Use Duration = ttt
-\item Maximum Volume Jobs = nnn
-\item Maximum Volume Bytes = mmm
-\end{itemize}
-Please see below and
-the \ilink{Basic Volume Management}{DiskChapter} chapter
-of this manual for more complete examples.
-
-Automatic recycling of Volumes is performed by Bacula only when it wants a
-new Volume and no appendable Volumes are available in the Pool. It will then
-search the Pool for any Volumes with the {\bf Recycle} flag set and whose
-Volume Status is {\bf Full}. At that point, the recycling occurs in two steps.
-The first is that the Catalog for a Volume must be purged of all Jobs and
-Files contained on that Volume, and the second step is the actual recycling of
-the Volume. The Volume will be purged if the VolumeRetention period has
-expired. When a Volume is marked as Purged, it means that no Catalog records
-reference that Volume, and the Volume can be recycled. Until recycling
-actually occurs, the Volume data remains intact. If no Volumes can be found
-for recycling for any of the reasons stated above, Bacula will request
-operator intervention (i.e. it will ask you to label a new volume).
-
-A key point mentioned above, that can be a source of frustration, is that Bacula
-will only recycle purged Volumes if there is no other appendable Volume
-available, otherwise, it will always write to an appendable Volume before
-recycling even if there are Volume marked as Purged. This preserves your data
-as long as possible. So, if you wish to "force" Bacula to use a purged
-Volume, you must first ensure that no other Volume in the Pool is marked {\bf
-Append}. If necessary, you can manually set a volume to {\bf Full}. The reason
-for this is that Bacula wants to preserve the data on your old tapes (even
-though purged from the catalog) as long as absolutely possible before
-overwriting it. There are also a number of directives such as
-{\bf Volume Use Duration} that will automatically mark a volume as {\bf
-Used} and thus no longer appendable.
-
-\label{AutoPruning}
-\section{Automatic Pruning}
-\index[general]{Automatic Pruning}
-\index[general]{Pruning!Automatic}
-
-As Bacula writes files to tape, it keeps a list of files, jobs, and volumes
-in a database called the catalog. Among other things, the database helps
-Bacula to decide which files to back up in an incremental or differential
-backup, and helps you locate files on past backups when you want to restore
-something. However, the catalog will grow larger and larger as time goes
-on, and eventually it can become unacceptably large.
-
-Bacula's process for removing entries from the catalog is called Pruning.
-The default is Automatic Pruning, which means that once an entry reaches a
-certain age (e.g. 30 days old) it is removed from the catalog. Once a job
-has been pruned, you can still restore it from the backup tape, but one
-additional step is required: scanning the volume with bscan. The
-alternative to Automatic Pruning is Manual Pruning, in which you explicitly
-tell Bacula to erase the catalog entries for a volume. You'd usually do
-this when you want to reuse a Bacula volume, because there's no point in
-keeping a list of files that USED TO BE on a tape. Or, if the catalog is
-starting to get too big, you could prune the oldest jobs to save space.
-Manual pruning is done with the \ilink{ prune command}{ManualPruning} in
-the console. (thanks to Bryce Denney for the above explanation).
-
-\section{Pruning Directives}
-\index[general]{Pruning Directives }
-\index[general]{Directives!Pruning }
-
-There are three pruning durations. All apply to catalog database records and
-not to the actual data in a Volume. The pruning (or retention) durations are
-for: Volumes (Media records), Jobs (Job records), and Files (File records).
-The durations inter-depend a bit because if Bacula prunes a Volume, it
-automatically removes all the Job records, and all the File records. Also when
-a Job record is pruned, all the File records for that Job are also pruned
-(deleted) from the catalog.
-
-Having the File records in the database means that you can examine all the
-files backed up for a particular Job. They take the most space in the catalog
-(probably 90-95\% of the total). When the File records are pruned, the Job
-records can remain, and you can still examine what Jobs ran, but not the
-details of the Files backed up. In addition, without the File records, you
-cannot use the Console restore command to restore the files.
-
-When a Job record is pruned, the Volume (Media record) for that Job can still
-remain in the database, and if you do a "`list volumes"', you will see the
-volume information, but the Job records (and its File records) will no longer
-be available.
-
-In each case, pruning removes information about where older files are, but it
-also prevents the catalog from growing to be too large. You choose the
-retention periods in function of how many files you are backing up and the
-time periods you want to keep those records online, and the size of the
-database. You can always re-insert the records (with 98\% of the original data)
-by using "`bscan"' to scan in a whole Volume or any part of the volume that
-you want.
-
-By setting {\bf AutoPrune} to {\bf yes} you will permit {\bf Bacula} to
-automatically prune all Volumes in the Pool when a Job needs another Volume.
-Volume pruning means removing records from the catalog. It does not shrink the
-size of the Volume or affect the Volume data until the Volume gets
-overwritten. When a Job requests another volume and there are no Volumes with
-Volume Status {\bf Append} available, Bacula will begin volume pruning. This
-means that all Jobs that are older than the {\bf VolumeRetention} period will
-be pruned from every Volume that has Volume Status {\bf Full} or {\bf Used}
-and has Recycle set to {\bf yes}. Pruning consists of deleting the
-corresponding Job, File, and JobMedia records from the catalog database. No
-change to the physical data on the Volume occurs during the pruning process.
-When all files are pruned from a Volume (i.e. no records in the catalog), the
-Volume will be marked as {\bf Purged} implying that no Jobs remain on the
-volume. The Pool records that control the pruning are described below.
-
-\begin{description}
-
-\item [AutoPrune = \lt{}yes|no\gt{}]
- \index[console]{AutoPrune }
- If AutoPrune is set to {\bf yes} (default), Bacula
- will automatically apply the Volume retention period when running a Job and
- it needs a new Volume but no appendable volumes are available. At that point,
- Bacula will prune all Volumes that can be pruned (i.e. AutoPrune set) in an
- attempt to find a usable volume. If during the autoprune, all files are
- pruned from the Volume, it will be marked with VolStatus {\bf Purged}. The
- default is {\bf yes}. Note, that although the File and Job records may be
- pruned from the catalog, a Volume will be marked Purged (and hence
- ready for recycling) if the Volume status is Append, Full, Used, or Error.
- If the Volume has another status, such as Archive, Read-Only, Disabled,
- Busy, or Cleaning, the Volume status will not be changed to Purged.
-
-\item [Volume Retention = \lt{}time-period-specification\gt{}]
- \index[console]{Volume Retention}
- The Volume Retention record defines the length of time that Bacula will
- guarantee that the Volume is not reused counting from the time the last
- job stored on the Volume terminated. A key point is that this time
- period is not even considered as long at the Volume remains appendable.
- The Volume Retention period count down begins only when the Append
- status has been changed to some othe status (Full, Used, Purged, ...).
-
- When this time period expires, and if {\bf AutoPrune} is set to {\bf
- yes}, and a new Volume is needed, but no appendable Volume is available,
- Bacula will prune (remove) Job records that are older than the specified
- Volume Retention period.
-
- The Volume Retention period takes precedence over any Job Retention
- period you have specified in the Client resource. It should also be
- noted, that the Volume Retention period is obtained by reading the
- Catalog Database Media record rather than the Pool resource record.
- This means that if you change the VolumeRetention in the Pool resource
- record, you must ensure that the corresponding change is made in the
- catalog by using the {\bf update pool} command. Doing so will insure
- that any new Volumes will be created with the changed Volume Retention
- period. Any existing Volumes will have their own copy of the Volume
- Retention period that can only be changed on a Volume by Volume basis
- using the {\bf update volume} command.
-
- When all file catalog entries are removed from the volume, its VolStatus is
- set to {\bf Purged}. The files remain physically on the Volume until the
- volume is overwritten.
-
- Retention periods are specified in seconds, minutes, hours, days, weeks,
- months, quarters, or years on the record. See the
- \ilink{Configuration chapter}{Time} of this manual for
- additional details of time specification.
-
-The default is 1 year.
-% TODO: if that is the format, should it be in quotes? decide on a style
-
-\item [Recycle = \lt{}yes|no\gt{}]
- \index[fd]{Recycle }
- This statement tells Bacula whether or not the particular Volume can be
- recycled (i.e. rewritten). If Recycle is set to {\bf no} (the
- default), then even if Bacula prunes all the Jobs on the volume and it
- is marked {\bf Purged}, it will not consider the tape for recycling. If
- Recycle is set to {\bf yes} and all Jobs have been pruned, the volume
- status will be set to {\bf Purged} and the volume may then be reused
- when another volume is needed. If the volume is reused, it is relabeled
- with the same Volume Name, however all previous data will be lost.
- \end{description}
-
- It is also possible to "force" pruning of all Volumes in the Pool
- associated with a Job by adding {\bf Prune Files = yes} to the Job resource.
-
-\label{Recycling}
-\label{RecyclingAlgorithm}
-\section{Recycling Algorithm}
-\index[general]{Algorithm!Recycling }
-\index[general]{Recycling Algorithm }
-
-After all Volumes of a Pool have been pruned (as mentioned above, this happens
-when a Job needs a new Volume and no appendable Volumes are available), Bacula
-will look for the oldest Volume that is Purged (all Jobs and Files expired),
-and if the {\bf Recycle} flag is on (Recycle=yes) for that Volume, Bacula will
-relabel it and write new data on it.
-
-As mentioned above, there are two key points for getting a Volume
-to be recycled. First, the Volume must no longer be marked Append (there
-are a number of directives to automatically make this change), and second
-since the last write on the Volume, one or more of the Retention periods
-must have expired so that there are no more catalog backup job records
-that reference that Volume. Once both those conditions are satisfied,
-the volume can be marked Purged and hence recycled.
-
-The full algorithm that Bacula uses when it needs a new Volume is:
-\index[general]{New Volume Algorithm}
-\index[general]{Algorithm!New Volume}
-
-The algorithm described below assumes that AutoPrune is enabled,
-that Recycling is turned on, and that you have defined
-appropriate Retention periods, or used the defaults for all these
-items.
-
-\begin{itemize}
-\item If the request is for an Autochanger device, look only
- for Volumes in the Autochanger (i.e. with InChanger set and that have
- the correct Storage device).
-\item Search the Pool for a Volume with VolStatus=Append (if there is more
- than one, the Volume with the oldest date last written is chosen. If
- two have the same date then the one with the lowest MediaId is chosen).
-\item Search the Pool for a Volume with VolStatus=Recycle and the InChanger
- flag is set true (if there is more than one, the Volume with the oldest
- date last written is chosen. If two have the same date then the one
- with the lowest MediaId is chosen).
-\item Try recycling any purged Volumes.
-\item Prune volumes applying Volume retention period (Volumes with VolStatus
- Full, Used, or Append are pruned). Note, even if all the File and Job
- records are pruned from a Volume, the Volume will not be marked Purged
- until the Volume retention period expires.
-\item Search the Pool for a Volume with VolStatus=Purged
-\item If a Pool named "Scratch" exists, search for a Volume and if found
- move it to the current Pool for the Job and use it. Note, when
- the Scratch Volume is moved into the current Pool, the basic
- Pool defaults are applied as if it is a newly labeled Volume
- (equivalent to an {\bf update volume from pool} command).
-\item If we were looking for Volumes in the Autochanger, go back to
- step 2 above, but this time, look for any Volume whether or not
- it is in the Autochanger.
-\item Attempt to create a new Volume if automatic labeling enabled
- If Python is enabled, a Python NewVolume event is generated before
- the Label Format directve is used. If the maximum number of Volumes
- specified for the pool is reached, a new Volume will not be created.
-\item Prune the oldest Volume if RecycleOldestVolume=yes (the Volume with the
- oldest LastWritten date and VolStatus equal to Full, Recycle, Purged, Used,
- or Append is chosen). This record ensures that all retention periods are
- properly respected.
-\item Purge the oldest Volume if PurgeOldestVolume=yes (the Volume with the
- oldest LastWritten date and VolStatus equal to Full, Recycle, Purged, Used,
- or Append is chosen). We strongly recommend against the use of {\bf
- PurgeOldestVolume} as it can quite easily lead to loss of current backup
- data.
-\item Give up and ask operator.
-\end{itemize}
-
-The above occurs when Bacula has finished writing a Volume or when no Volume
-is present in the drive.
-
-On the other hand, if you have inserted a different Volume after the last job,
-and Bacula recognizes the Volume as valid, it will request authorization from
-the Director to use this Volume. In this case, if you have set {\bf Recycle
-Current Volume = yes} and the Volume is marked as Used or Full, Bacula will
-prune the volume and if all jobs were removed during the pruning (respecting
-the retention periods), the Volume will be recycled and used.
-
-The recycling algorithm in this case is:
-\begin{itemize}
-\item If the VolStatus is {\bf Append} or {\bf Recycle}
- is set, the volume will be used.
-\item If {\bf Recycle Current Volume} is set and the volume is marked {\bf
- Full} or {\bf Used}, Bacula will prune the volume (applying the retention
- period). If all Jobs are pruned from the volume, it will be recycled.
-\end{itemize}
-
-This permits users to manually change the Volume every day and load tapes in
-an order different from what is in the catalog, and if the volume does not
-contain a current copy of your backup data, it will be used.
-
-A few points from Alan Brown to keep in mind:
-
-\begin{enumerate}
-\item If a pool doesn't have maximum volumes defined then Bacula will prefer to
- demand new volumes over forcibly purging older volumes.
-
-\item If volumes become free through pruning and the Volume retention period has
- expired, then they get marked as "purged" and are immediately available for
- recycling - these will be used in preference to creating new volumes.
-
-\item If the Job, File, and Volume retention periods are different, then
- it's common to see a tape with no files or jobs listed in the database,
- but which is still not marked as "`purged"'.
-\end{enumerate}
-
-
-\section{Recycle Status}
-\index[general]{Status!Recycle }
-\index[general]{Recycle Status }
-
-Each Volume inherits the Recycle status (yes or no) from the Pool resource
-record when the Media record is created (normally when the Volume is labeled).
-This Recycle status is stored in the Media record of the Catalog. Using
-the Console program, you may subsequently change the Recycle status for each
-Volume. For example in the following output from {\bf list volumes}:
-
-\footnotesize
-\begin{verbatim}
-+----------+-------+--------+---------+------------+--------+-----+
-| VolumeNa | Media | VolSta | VolByte | LastWritte | VolRet | Rec |
-+----------+-------+--------+---------+------------+--------+-----+
-| File0001 | File | Full | 4190055 | 2002-05-25 | 14400 | 1 |
-| File0002 | File | Full | 1896460 | 2002-05-26 | 14400 | 1 |
-| File0003 | File | Full | 1896460 | 2002-05-26 | 14400 | 1 |
-| File0004 | File | Full | 1896460 | 2002-05-26 | 14400 | 1 |
-| File0005 | File | Full | 1896460 | 2002-05-26 | 14400 | 1 |
-| File0006 | File | Full | 1896460 | 2002-05-26 | 14400 | 1 |
-| File0007 | File | Purged | 1896466 | 2002-05-26 | 14400 | 1 |
-+----------+-------+--------+---------+------------+--------+-----+
-\end{verbatim}
-\normalsize
-
-all the volumes are marked as recyclable, and the last Volume, {\bf File0007}
-has been purged, so it may be immediately recycled. The other volumes are all
-marked recyclable and when their Volume Retention period (14400 seconds or four
-hours) expires, they will be eligible for pruning, and possibly recycling.
-Even though Volume {\bf File0007} has been purged, all the data on the Volume
-is still recoverable. A purged Volume simply means that there are no entries
-in the Catalog. Even if the Volume Status is changed to {\bf Recycle}, the
-data on the Volume will be recoverable. The data is lost only when the Volume
-is re-labeled and re-written.
-
-To modify Volume {\bf File0001} so that it cannot be recycled, you use the
-{\bf update volume pool=File} command in the console program, or simply {\bf
-update} and Bacula will prompt you for the information.
-
-\footnotesize
-\begin{verbatim}
-+----------+------+-------+---------+-------------+-------+-----+
-| VolumeNa | Media| VolSta| VolByte | LastWritten | VolRet| Rec |
-+----------+------+-------+---------+-------------+-------+-----+
-| File0001 | File | Full | 4190055 | 2002-05-25 | 14400 | 0 |
-| File0002 | File | Full | 1897236 | 2002-05-26 | 14400 | 1 |
-| File0003 | File | Full | 1896460 | 2002-05-26 | 14400 | 1 |
-| File0004 | File | Full | 1896460 | 2002-05-26 | 14400 | 1 |
-| File0005 | File | Full | 1896460 | 2002-05-26 | 14400 | 1 |
-| File0006 | File | Full | 1896460 | 2002-05-26 | 14400 | 1 |
-| File0007 | File | Purged| 1896466 | 2002-05-26 | 14400 | 1 |
-+----------+------+-------+---------+-------------+-------+-----+
-\end{verbatim}
-\normalsize
-
-In this case, {\bf File0001} will never be automatically recycled. The same
-effect can be achieved by setting the Volume Status to Read-Only.
-
-As you have noted, the Volume Status (VolStatus) column in the
-catalog database contains the current status of the Volume, which
-is normally maintained automatically by Bacula. To give you an
-idea of some of the values it can take during the life cycle of
-a Volume, here is a picture created by Arno Lehmann:
-
-\footnotesize
-\begin{verbatim}
-A typical volume life cycle is like this:
-
- because job count or size limit exceeded
- Append ----------------------------------------> Used
- ^ |
- | First Job writes to Retention time passed |
- | the volume and recycling takes |
- | place |
- | v
- Recycled <-------------------------------------- Purged
- Volume is selected for reuse
-
-\end{verbatim}
-\normalsize
-
-
-\section{Making Bacula Use a Single Tape}
-\label{singletape}
-\index[general]{Tape!Making Bacula Use a Single}
-\index[general]{Making Bacula Use a Single Tape}
-
-Most people will want Bacula to fill a tape and when it is full, a new tape
-will be mounted, and so on. However, as an extreme example, it is possible for
-Bacula to write on a single tape, and every night to rewrite it. To get this
-to work, you must do two things: first, set the VolumeRetention to less than
-your save period (one day), and the second item is to make Bacula mark the
-tape as full after using it once. This is done using {\bf UseVolumeOnce =
-yes}. If this latter record is not used and the tape is not full after the
-first time it is written, Bacula will simply append to the tape and eventually
-request another volume. Using the tape only once, forces the tape to be marked
-{\bf Full} after each use, and the next time {\bf Bacula} runs, it will
-recycle the tape.
-
-An example Pool resource that does this is:
-
-\footnotesize
-\begin{verbatim}
-Pool {
- Name = DDS-4
- Use Volume Once = yes
- Pool Type = Backup
- AutoPrune = yes
- VolumeRetention = 12h # expire after 12 hours
- Recycle = yes
-}
-\end{verbatim}
-\normalsize
-
-\section{Daily, Weekly, Monthly Tape Usage Example}
-\label{usageexample}
-\index[general]{Daily, Weekly, Monthly Tape Usage Example }
-\index[general]{Example!Daily Weekly Monthly Tape Usage }
-
-This example is meant to show you how one could define a fixed set of volumes
-that Bacula will rotate through on a regular schedule. There are an infinite
-number of such schemes, all of which have various advantages and
-disadvantages.
-
-We start with the following assumptions:
-
-\begin{itemize}
-\item A single tape has more than enough capacity to do a full save.
-\item There are ten tapes that are used on a daily basis for incremental
- backups. They are prelabeled Daily1 ... Daily10.
-\item There are four tapes that are used on a weekly basis for full backups.
- They are labeled Week1 ... Week4.
-\item There are 12 tapes that are used on a monthly basis for full backups.
- They are numbered Month1 ... Month12
-\item A full backup is done every Saturday evening (tape inserted Friday
- evening before leaving work).
-\item No backups are done over the weekend (this is easy to change).
-\item The first Friday of each month, a Monthly tape is used for the Full
- backup.
-\item Incremental backups are done Monday - Friday (actually Tue-Fri
- mornings).
-% TODO: why this "actually"? does this need to be explained?
- \end{itemize}
-
-We start the system by doing a Full save to one of the weekly volumes or one
-of the monthly volumes. The next morning, we remove the tape and insert a
-Daily tape. Friday evening, we remove the Daily tape and insert the next tape
-in the Weekly series. Monday, we remove the Weekly tape and re-insert the
-Daily tape. On the first Friday of the next month, we insert the next Monthly
-tape in the series rather than a Weekly tape, then continue. When a Daily tape
-finally fills up, {\bf Bacula} will request the next one in the series, and
-the next day when you notice the email message, you will mount it and {\bf
-Bacula} will finish the unfinished incremental backup.
-
-What does this give? Well, at any point, you will have the last complete
-Full save plus several Incremental saves. For any given file you want to
-recover (or your whole system), you will have a copy of that file every day
-for at least the last 14 days. For older versions, you will have at least three
-and probably four Friday full saves of that file, and going back further, you
-will have a copy of that file made on the beginning of the month for at least
-a year.
-
-So you have copies of any file (or your whole system) for at least a year, but
-as you go back in time, the time between copies increases from daily to weekly
-to monthly.
-
-What would the Bacula configuration look like to implement such a scheme?
-
-\footnotesize
-\begin{verbatim}
-Schedule {
- Name = "NightlySave"
- Run = Level=Full Pool=Monthly 1st sat at 03:05
- Run = Level=Full Pool=Weekly 2nd-5th sat at 03:05
- Run = Level=Incremental Pool=Daily tue-fri at 03:05
-}
-Job {
- Name = "NightlySave"
- Type = Backup
- Level = Full
- Client = LocalMachine
- FileSet = "File Set"
- Messages = Standard
- Storage = DDS-4
- Pool = Daily
- Schedule = "NightlySave"
-}
-# Definition of file storage device
-Storage {
- Name = DDS-4
- Address = localhost
- SDPort = 9103
- Password = XXXXXXXXXXXXX
- Device = FileStorage
- Media Type = 8mm
-}
-FileSet {
- Name = "File Set"
- Include = signature=MD5 {
- fffffffffffffffff
- }
- Exclude = { *.o }
-}
-Pool {
- Name = Daily
- Pool Type = Backup
- AutoPrune = yes
- VolumeRetention = 10d # recycle in 10 days
- Maximum Volumes = 10
- Recycle = yes
-}
-Pool {
- Name = Weekly
- Use Volume Once = yes
- Pool Type = Backup
- AutoPrune = yes
- VolumeRetention = 30d # recycle in 30 days (default)
- Recycle = yes
-}
-Pool {
- Name = Monthly
- Use Volume Once = yes
- Pool Type = Backup
- AutoPrune = yes
- VolumeRetention = 365d # recycle in 1 year
- Recycle = yes
-}
-\end{verbatim}
-\normalsize
-
-\section{ Automatic Pruning and Recycling Example}
-\label{PruningExample}
-\index[general]{Automatic Pruning and Recycling Example }
-\index[general]{Example!Automatic Pruning and Recycling }
-
-Perhaps the best way to understand the various resource records that come into
-play during automatic pruning and recycling is to run a Job that goes through
-the whole cycle. If you add the following resources to your Director's
-configuration file:
-
-\footnotesize
-\begin{verbatim}
-Schedule {
- Name = "30 minute cycle"
- Run = Level=Full Pool=File Messages=Standard Storage=File
- hourly at 0:05
- Run = Level=Full Pool=File Messages=Standard Storage=File
- hourly at 0:35
-}
-Job {
- Name = "Filetest"
- Type = Backup
- Level = Full
- Client=XXXXXXXXXX
- FileSet="Test Files"
- Messages = Standard
- Storage = File
- Pool = File
- Schedule = "30 minute cycle"
-}
-# Definition of file storage device
-Storage {
- Name = File
- Address = XXXXXXXXXXX
- SDPort = 9103
- Password = XXXXXXXXXXXXX
- Device = FileStorage
- Media Type = File
-}
-FileSet {
- Name = "Test Files"
- Include = signature=MD5 {
- fffffffffffffffff
- }
- Exclude = { *.o }
-}
-Pool {
- Name = File
- Use Volume Once = yes
- Pool Type = Backup
- LabelFormat = "File"
- AutoPrune = yes
- VolumeRetention = 4h
- Maximum Volumes = 12
- Recycle = yes
-}
-\end{verbatim}
-\normalsize
-
-Where you will need to replace the {\bf ffffffffff}'s by the appropriate files
-to be saved for your configuration. For the FileSet Include, choose a
-directory that has one or two megabytes maximum since there will probably be
-approximately eight copies of the directory that {\bf Bacula} will cycle through.
-
-In addition, you will need to add the following to your Storage daemon's
-configuration file:
-
-\footnotesize
-\begin{verbatim}
-Device {
- Name = FileStorage
- Media Type = File
- Archive Device = /tmp
- LabelMedia = yes;
- Random Access = Yes;
- AutomaticMount = yes;
- RemovableMedia = no;
- AlwaysOpen = no;
-}
-\end{verbatim}
-\normalsize
-
-With the above resources, Bacula will start a Job every half hour that saves a
-copy of the directory you chose to /tmp/File0001 ... /tmp/File0012. After 4
-hours, Bacula will start recycling the backup Volumes (/tmp/File0001 ...). You
-should see this happening in the output produced. Bacula will automatically
-create the Volumes (Files) the first time it uses them.
-
-To turn it off, either delete all the resources you've added, or simply
-comment out the {\bf Schedule} record in the {\bf Job} resource.
-
-\section{Manually Recycling Volumes}
-\label{manualrecycling}
-\index[general]{Volumes!Manually Recycling }
-\index[general]{Manually Recycling Volumes }
-
-Although automatic recycling of Volumes is implemented in version 1.20 and
-later (see the
-\ilink{Automatic Recycling of Volumes}{RecyclingChapter} chapter of
-this manual), you may want to manually force reuse (recycling) of a Volume.
-
-Assuming that you want to keep the Volume name, but you simply want to write
-new data on the tape, the steps to take are:
-
-\begin{itemize}
-\item Use the {\bf update volume} command in the Console to ensure that the
- {\bf Recycle} field is set to {\bf 1}
-\item Use the {\bf purge jobs volume} command in the Console to mark the
- Volume as {\bf Purged}. Check by using {\bf list volumes}.
-\end{itemize}
-
-Once the Volume is marked Purged, it will be recycled the next time a Volume
-is needed.
-
-If you wish to reuse the tape by giving it a new name, follow the following
-steps:
-
-\begin{itemize}
-\item Use the {\bf purge jobs volume} command in the Console to mark the
- Volume as {\bf Purged}. Check by using {\bf list volumes}.
-\item In Bacula version 1.30 or greater, use the Console {\bf relabel}
- command to relabel the Volume.
-\end{itemize}
-
-Please note that the relabel command applies only to tape Volumes.
-
-For Bacula versions prior to 1.30 or to manually relabel the Volume, use the
-instructions below:
-
-\begin{itemize}
-\item Use the {\bf delete volume} command in the Console to delete the Volume
- from the Catalog.
-\item If a different tape is mounted, use the {\bf unmount} command,
- remove the tape, and insert the tape to be renamed.
-\item Write an EOF mark in the tape using the following commands:
-
-\footnotesize
-\begin{verbatim}
- mt -f /dev/nst0 rewind
- mt -f /dev/nst0 weof
-\end{verbatim}
-\normalsize
-
-where you replace {\bf /dev/nst0} with the appropriate device name on your
-system.
-\item Use the {\bf label} command to write a new label to the tape and to
- enter it in the catalog.
-\end{itemize}
-
-Please be aware that the {\bf delete} command can be dangerous. Once it is
-done, to recover the File records, you must either restore your database as it
-was before the {\bf delete} command, or use the {\bf bscan} utility program to
-scan the tape and recreate the database entries.
projects / bacula / docs / blobdiff