\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
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}