\index[sd]{Maximum Concurrent Jobs}
\index[sd]{Directive!Maximum Concurrent Jobs}
where \lt{}number\gt{} is the maximum number of Jobs that may run
- concurrently. The default is set to 10, but you may set it to a larger
+ concurrently. The default is set to 20, but you may set it to a larger
number. Each contact from the Director (e.g. status request, job start
request) is considered as a Job, so if you want to be able to do a {\bf
status} request in the console at the same time as a Job is running, you
\item [Changer Device = {\it name-string}]
\index[sd]{Changer Device}
\index[sd]{Directive!Changer Device}
+ Note: Eventhough this directive may be specified in the Device resource,
+ it is normally specified only in the {\bf Autochanger} resource. It
+ is listed here for historical reasons.
+ \smallskip
The specified {\bf name-string} must be the {\bf generic SCSI} device
name of the autochanger that corresponds to the normal read/write
{\bf Archive Device} specified in the Device resource. This
/dev/sg0} for the Changer Device name. Depending on your exact
configuration, and the number of autochangers or the type of
autochanger, what you specify here can vary. This directive is
- optional. See the \ilink{ Using Autochangers}{AutochangersChapter} chapter
+ optional. See the \ilink{Using Autochangers}{AutochangersChapter} chapter
of this manual for more details of using this and the following
autochanger directives.
\item [Changer Command = {\it name-string}]
\index[sd]{Changer Command}
\index[sd]{Directive!Changer Command}
+ Note: Eventhough this directive may be specified in the Device resource,
+ it is normally specified only in the {\bf Autochanger} resource. It
+ is listed here for historical reasons.
+ \smallskip
The {\bf name-string} specifies an external program to be called that will
automatically change volumes as required by {\bf Bacula}. Normally,
this directive will be specified only in the {\bf AutoChanger} resource,
\item [Drive Index = {\it number}]
\index[sd]{Drive Index}
\index[sd]{Directive!Drive Index}
+ This directive is only used for a Device that is part of an
+ Autochanger.
The {\bf Drive Index} that you specify is passed to the {\bf
mtx-changer} script and is thus passed to the {\bf mtx} program. By
default, the Drive Index is zero, so if you have only one drive in your
\item [Maximum Open Wait = {\it time}]
\index[sd]{Maximum Open Wait}
\index[sd]{Directive!Maximum Open Wait}
- This directive specifies the maximum time in seconds for Bacula to wait
- for a open before timing out. If this time is exceeded,
- Bacula will cancel the job. The default is 5 minutes.
+ This directive specifies the maximum time in seconds that
+ Bacula will wait for a device that is busy. The default is 5 minutes.
+ If the device cannot be obtained, the current Job will be terminated in
+ error. Bacula will re-attempt to open the drive the next time a Job
+ starts that needs the the drive.
\item [Always Open = {\it yes\vb{}no}]
\index[sd]{Always Open}
\index[sd]{Directive!Always Open}
- If {\bf Yes}, Bacula will always keep the device open unless
+ If {\bf Yes} (default), Bacula will always keep the device open unless
specifically {\bf unmounted} by the Console program. This permits
Bacula to ensure that the tape drive is always available, and properly
positioned. If you set
- {\bf AlwaysOpen} to {\bf no} (default) {\bf Bacula} will only open the
+ {\bf AlwaysOpen} to {\bf no}, {\bf Bacula} will only open the
drive when necessary, and at the end of the Job if no other Jobs are
using the drive, it will be freed. The next time Bacula wants to append
to a tape on a drive that was freed, Bacula will rewind the tape and
minimize unnecessary operator intervention, it is highly recommended
that {\bf Always Open = yes}. This also ensures that the drive is
available when Bacula needs it.
-
+
If you have {\bf Always Open = yes} (recommended) and you want to use the
drive for something else, simply use the {\bf unmount} command in the
Console program to release the drive. However, don't forget to remount the
the drive on the next poll and automatically continue with the backup.
Please see above more more details.
-\item [Maximum Open Wait = {\it time}]
- \index[sd]{Maximum Open Wait}
- \index[sd]{Directive!Maximum Open Wait}
- This directive specifies the maximum amount of time in seconds that
- Bacula will wait for a device that is busy. The default is 5 minutes.
- If the device cannot be obtained, the current Job will be terminated in
- error. Bacula will re-attempt to open the drive the next time a Job
- starts that needs the the drive.
-
\label{removablemedia}
\item [Removable media = {\it yes\vb{}no}]
\index[sd]{Removable media}
executed, \%a is replaced with the Archive Device, and \%m with the Mount
Point.
-See the \ilink {Edit Codes}{mountcodes} section below for more details of
+See the \ilink{Edit Codes}{mountcodes} section below for more details of
the editing codes that can be used in this directive.
If you need to specify multiple commands, create a shell script.
\end{verbatim}
\normalsize
-See the \ilink {Edit Codes}{mountcodes} section below for more details of
+See the \ilink{Edit Codes}{mountcodes} section below for more details of
the editing codes that can be used in this directive.
If you need to specify multiple commands, create a shell script.
block to achieve the required minimum size.
To force the block size to be fixed, as is the case for some non-random
- access devices (tape drives), set the {\bf Minimum block size} and the
- {\bf Maximum block size} to the same value (zero included). The default
+ access devices (tape drives), set the {\bf Minimum Block Size} and the
+ {\bf Maximum Block Size} to the same value (zero included). The default
is that both the minimum and maximum block size are zero and the default
block size is 64,512 bytes.
\begin{verbatim}
Minimum block size = 64K
- Maximum blocksize = 200K
+ Maximum blocksize = 256K
\end{verbatim}
\normalsize
-\item [Maximum block size = {\it size-in-bytes}]
- \index[sd]{Maximum block size}
+\item [Maximum Block Size = {\it size-in-bytes}]
+ \index[sd]{Maximum Block Size}
\index[sd]{Directive!Maximum block size}
On most modern tape drives, you will not need to specify this directive.
- If you do so, it will most likely be to use fixed block sizes (see
- Minimum block size above). The Storage daemon will always attempt to
- write blocks of the specified {\bf size-in-bytes} to the archive device.
- As a consequence, this statement specifies both the default block size
- and the maximum block size. The size written never exceed the given
- {\bf size-in-bytes}. If adding data to a block would cause it to exceed
- the given maximum size, the block will be written to the archive device,
- and the new data will begin a new block.
+ If you do so, it will most likely be to reduce shoe-shine and improve
+ performance on more modern LTO drives. The Storage daemon will always
+ attempt to write blocks of the specified {\bf size-in-bytes} to the
+ archive device. As a consequence, this statement specifies both the
+ default block size and the maximum block size. The size written never
+ exceeds the given {\bf size-in-bytes}. If adding data to a block would
+ cause it to exceed the given maximum size, the block will be written to
+ the archive device, and the new data will begin a new block.
If no value is specified or zero is specified, the Storage daemon will
use a default block size of 64,512 bytes (126 * 512).
- The maximum {\bf size-in-bytes} possible is 2,000,000.
+ The maximum {\bf size-in-bytes} possible is 4,000,000.
\item [Hardware End of Medium = {\it yes\vb{}no}]
\index[sd]{Hardware End of Medium}
%e = erase (set if cannot mount and first part)
%n = part number
%m = mount point
-\end{lstlisting}
+\end{verbatim}
\normalsize
USB unless they are automounted, and to {\bf no} for all other devices
(tapes/files). This directive indicates if the device requires to be
mounted to be read, and if it must be written in a special way. If it
- set, {\bf Mount Point}, {\bf Mount Command}, {\bf Unmount Command} and
- {\bf Write Part Command} directives must also be defined.
+ set, {\bf Mount Point}, {\bf Mount Command}, and {\bf Unmount Command}
+ directives must also be defined.
\item [Mount Point = {\it directory}]
\index[sd]{Mount Point}
\end{description}
%% This pulls in the Autochanger resource from another file.
-\label{AutochangerRes}
-\label{AutochangerResource1}
-\input{autochangerres}
+%%\label{AutochangerRes}
+%%\label{AutochangerResource1}
+%%\input{autochangerres}
\section{Capabilities}
\index[general]{Capabilities}
projects / bacula / docs / blobdiff