IBM Aspera HST Admin Manual page 150

time. Timestamp support in object storage varies by provider; consult your object storage
documentation to determine which settings are supported.
On Windows, modification time may be affected when the system automatically adjusts
for Daylight Savings Time (DST). For details, see the Microsoft KB article,
support.microsoft.com/kb/129574.
On Isilon IQ OneFS systems, access time (atime) is disabled by default. In this case, atime is the
same as mtime. To enable the preservation of atime, run the following command:
# sysctl efs.bam.atime_enabled=1
--policy={fixed|high|fair|low}
Transfer according to the specified policy:
• fixed – Attempt to transfer at the specified target rate, regardless of network capacity. Content
is transferred at a constant rate and the transfer finishes in a guaranteed time. The fixed policy
can consume most of the network's bandwidth and is not recommended for most types of file
transfers. This option requires a maximum (target) rate value (-l).
• high – Adjust the transfer rate to fully utilize the available bandwidth up to the maximum rate.
When congestion occurs, the transfer rate is twice as fast as transfer with a fair policy. This
option requires maximum (target) and minimum transfer rates (-l and -m).
• fair – Adjust the transfer rate to fully utilize the available bandwidth up to the maximum rate.
When congestion occurs, bandwidth is shared fairly by transferring at an even rate. This option
requires maximum (target) and minimum transfer rates (-l and -m).
• low – Adjust the transfer rate to use the available bandwidth up to the maximum rate. Similar
to fair mode, but less aggressive when sharing bandwidth with other network traffic. When
congestion occurs, the transfer rate is reduced to the minimum rate until other traffic decreases.
If --policy is not set, ascp4 uses the server-side policy setting (fair by default).
--preserve-access-time
Preserve the file timestamps (currently the same as -p).
--preserve-creation-time
Preserve the file timestamps (currently the same as -p).
--preserve-file-owner-gid
--preserve-file-owner-uid
(Linux, UNIX, and macOS only) Preserve the group information (gid) or owner information (uid)
of the transferred files. These options require that the transfer user is authenticated as a superuser.
--preserve-modification-time
Preserve the file timestamps (currently the same as -p).
--preserve-source-access-time
Preserve the file timestamps (currently the same as -p).
-q
Run ascp4 in quiet mode. This option disables the progress display.
-R remote_log_dir
Log to the specified directory on the remote host rather than the default directory. Note: Client users
that are restricted to aspshell are not allowed to use this option.
--read-threads=num
Use the specified number of storage "read" threads (sender only). Default: 2. To set "write" threads
on the receiver, use --write-threads.
| ascp4: Transferring from the Command Line with Ascp 4 | 150
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