-
To send one file called "local.data" from the local system
directory to another computer
in the "/home/remoteuser/destiantionDir" folder, with default
parameters, there are two options:
- Client/Server mode
First,
the FDT server needs to be started on the remote system. ( The default
settings will be used, which implies the default port, 54321, on both
the
client and the server ). -S is used to disable the standalone mode,
which means that the server will stop after the session will finish
[remote computer]$ java -jar fdt.jar -S
Then,
the client will be started on the local system specifying the source
file, the remote address (or hostname) where the server was started in
the previous step and the destination directory
[local computer]$ java -jar fdt.jar -c <remote_address>
-d /home/remoteuser/destinationDir /home/localuser/local.data
OR
[local computer]$ java -jar fdt.jar -c <remote_address> -d destinationDir ./local.data
- Secure Copy (SCP) mode
In this mode the server will be started on the remote system
automatically by the local FDT client using SSH.
[local computer]$ java -jar fdt.jar /home/localuser/local.data
remoteuser@<remote_address>:/home/remoteuser/destinationDir
OR
[local computer]$ java -jar fdt.jar ./local.data remoteuser@<remote_address>:destinationDir
If the remoteuser parameter is not specified the local user, running
the fdt command, will be
used to login on the remote system
-
To get the content of an entire folder and all its children,
located in the user's home directory, the -r ( recursive
mode ) flag will be specified and also -pull to sink the data from the
server. In the Client/Server mode the access to the server will be
restricted to the local IP addresses only ( with -f flag ).
- Client/Server mode
Multiple addresses may be specfied using the -f flag using ':'. If the
client's IP address(es) is not specified in the allowed IP addresses
the connection will be closed. In the following command the server is
started in standalone mode, which means that will continue to run after
the session will finish. The transfer rate for every client sessions
will be limited to 4 MBytes/s
[remote computer]$ java -jar fdt.jar -f allowedIP1:allowedIP2 -limit 4M
OR
[remote computer]$ java -jar fdt.jar -f allowedIP1:allowedIP2 -limit 4096K
The command for the local client will be.
[local computer]$ java -jar fdt.jar -pull -r -c <remote_address>
-d /home/localuser/localDir /home/remoteuser/remoteDir
OR
[local computer]$ java -jar fdt.jar -pull -r -c <remote_address> -d localDir remoteDir
- SCP mode
In this mode only the order of the parameters will be changed, and -r
is the only argument that must be added ( -pull is implicit ). Same
authentication policies apply as in the first example
[local computer]$ java -jar fdt.jar -r
remoteuser@<remote_address>:/home/remoteuser/remoteDir /home/localuser/localDir
OR
[local computer]$ java -jar fdt.jar -r remoteuser@<remote_address>:remoteDir localDir
-
To test the network connectivity a transfer here is an example
which transfers data from /dev/zero to /dev/null using 10 streams in
blocking mode, for both the server and the client with 8 MBytes
buffers. The server will stop after the test is finished
[remote computer]$ java -jar fdt.jar -bio -bs 8M -f allowedIP -S
[local computer]$ java -jar fdt.jar -c <remote_address> -bio -P 10 -d /dev/null /dev/zero
- SCP mode
[local computer]$ java -jar fdt.jar -bio -P 10 /dev/zero remoteAddress:/dev/null
-
The user can also define a list of files ( a filename per line )
to be transfered. FDT will detect if the files are located on multiple
devices and will use a dedicated thread for each device.
[remote computer]$ java -jar fdt.jar -S
[local computer]$ java -jar fdt.jar -fl ./file_list.txt
-c <remote_address> -d /home/remoteuser/destDir
-
To test the local read/write performance of the local disk the
DDCopy may be used.
-
The following command will copy the entire partition
/dev/dsk/c0d1p1 to /dev/null reporting every 2 seconds ( the default )
the I/O speed
[local computer]$ java -cp fdt.jar lia.util.net.common.DDCopy if=/dev/dsk/c0d1p1 of=/dev/null
-
To test the write speed of the file system using a 1GB file
read from /dev/zero the following command may be used. The operating
system will sync() the data to the disk. The data will be read/write
using 10MB buffers
[local computer]$ java -cp fdt.jar lia.util.net.common.DDCopy
if=/dev/zero of=/home/user/1GBTestFile bs=10M count=100 flags=NOSYNC
OR
[local computer]$ java -cp fdt.jar lia.util.net.common.DDCopy
if=/dev/zero of=/home/user/1GBTestFile bs=1M bn=10 count=100 flags=NOSYNC
