# duct
[](https://codecov.io/gh/con/duct)
[](https://badge.fury.io/py/con-duct)
## Installation
pip install con-duct
## Quickstart
Try it out!
duct --sample-interval 0.5 --report-interval 1 test/data/test_script.py --duration 3 --memory-size=1000
`duct` is most useful when the report-interval is less than the duration of the script.
## Summary:
A process wrapper script that monitors the execution of a command.
<!-- BEGIN HELP -->
```shell
>duct --help
usage: duct [-h] [--version] [-p OUTPUT_PREFIX]
[--summary-format SUMMARY_FORMAT] [--clobber]
[-l {NONE,CRITICAL,ERROR,WARNING,INFO,DEBUG}] [-q]
[--sample-interval SAMPLE_INTERVAL]
[--report-interval REPORT_INTERVAL] [-c {all,none,stdout,stderr}]
[-o {all,none,stdout,stderr}]
[-t {all,system-summary,processes-samples}]
command [command_args ...] ...
duct is a lightweight wrapper that collects execution data for an arbitrary
command. Execution data includes execution time, system information, and
resource usage statistics of the command and all its child processes. It is
intended to simplify the problem of recording the resources necessary to
execute a command, particularly in an HPC environment.
Resource usage is determined by polling (at a sample-interval).
During execution, duct produces a JSON lines (see https://jsonlines.org) file
with one data point recorded for each report (at a report-interval).
environment variables:
Many duct options can be configured by environment variables (which are
overridden by command line options).
DUCT_LOG_LEVEL: see --log-level
DUCT_OUTPUT_PREFIX: see --output-prefix
DUCT_SUMMARY_FORMAT: see --summary-format
DUCT_SAMPLE_INTERVAL: see --sample-interval
DUCT_REPORT_INTERVAL: see --report-interval
DUCT_CAPTURE_OUTPUTS: see --capture-outputs
positional arguments:
command [command_args ...]
The command to execute, along with its arguments.
command_args Arguments for the command.
options:
-h, --help show this help message and exit
--version show program's version number and exit
-p OUTPUT_PREFIX, --output-prefix OUTPUT_PREFIX
File string format to be used as a prefix for the
files -- the captured stdout and stderr and the
resource usage logs. The understood variables are
{datetime}, {datetime_filesafe}, and {pid}. Leading
directories will be created if they do not exist. You
can also provide value via DUCT_OUTPUT_PREFIX env
variable. (default:
.duct/logs/{datetime_filesafe}-{pid}_)
--summary-format SUMMARY_FORMAT
Output template to use when printing the summary
following execution. (default: Exit Code: {exit_code}
Command: {command} Log files location: {logs_prefix}
Wall Clock Time: {wall_clock_time:.3f} sec Memory Peak
Usage (RSS): {peak_rss} bytes Memory Average Usage
(RSS): {average_rss} bytes Virtual Memory Peak Usage
(VSZ): {peak_vsz} bytes Virtual Memory Average Usage
(VSZ): {average_vsz} bytes Memory Peak Percentage:
{peak_pmem}% Memory Average Percentage:
{average_pmem}% CPU Peak Usage: {peak_pcpu}% Average
CPU Usage: {average_pcpu}% Samples Collected:
{num_samples} Reports Written: {num_reports} )
--clobber Replace log files if they already exist. (default:
False)
-l {NONE,CRITICAL,ERROR,WARNING,INFO,DEBUG}, --log_level {NONE,CRITICAL,ERROR,WARNING,INFO,DEBUG}
Level of log output to stderr, use NONE to entirely
disable. (default: INFO)
-q, --quiet [deprecated, use log level NONE] Disable duct logging
output (to stderr) (default: False)
--sample-interval SAMPLE_INTERVAL, --s-i SAMPLE_INTERVAL
Interval in seconds between status checks of the
running process. Sample interval must be less than or
equal to report interval, and it achieves the best
results when sample is significantly less than the
runtime of the process. (default: 1.0)
--report-interval REPORT_INTERVAL, --r-i REPORT_INTERVAL
Interval in seconds at which to report aggregated
data. (default: 60.0)
-c {all,none,stdout,stderr}, --capture-outputs {all,none,stdout,stderr}
Record stdout, stderr, all, or none to log files. You
can also provide value via DUCT_CAPTURE_OUTPUTS env
variable. (default: all)
-o {all,none,stdout,stderr}, --outputs {all,none,stdout,stderr}
Print stdout, stderr, all, or none to stdout/stderr
respectively. (default: all)
-t {all,system-summary,processes-samples}, --record-types {all,system-summary,processes-samples}
Record system-summary, processes-samples, or all
(default: all)
```
<!-- END HELP -->
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