Sometimes the user would like to dump all the metrics into a file or
pipe it to another program, as requested in issue #1506.
This patch makes scyllatop check if stdout is connected to a TTY,
and if not - it does not fire up the fancy urwid UI but instead, just
writes all it's collected metrics to stdout.
Optionally, the user tell the program to quit after a specific
number of iterations via the -n or --iterations flag
Signed-off-by: Yoav Kleinberger <yoav@scylladb.com>
Message-Id: <1471777516-9903-1-git-send-email-yoav@scylladb.com>
Sometimes a metric previously reported from collectd is not available
anymore. Previously, this caused scyllatop to log and exception to the
user - which in effect destroyes the user experience and inhibits
monitoring other metrics. This patch makes ScyllaTop handle this
problem. It will display such metrics and 'not available', and exclude
them from some and average computations.
Closes issue #1287.
Signed-off-by: Yoav Kleinberger <yoav@scylladb.com>
Message-Id: <1465301178-27544-1-git-send-email-yoav@scylladb.com>
NOTE: scyllatop now requires the urwid library
previously, if there were more metrics that lines in the terminal
window, the user could not see some of the metrics. Now the user can
scroll.
As an added bonus, the program will not crash when the window size
changes.
Signed-off-by: Yoav Kleinberger <yoav@scylladb.com>
Message-Id: <1464098832-5755-1-git-send-email-yoav@scylladb.com>
When running with DEBUG verbosity, scyllatop will now log every single
value it receives from collectd. When you suspect that scyllatop is
somehow distorting values, this is a good way to check it.
Signed-off-by: Yoav Kleinberger <yoav@scylladb.com>
Message-Id: <1463320730-6631-1-git-send-email-yoav@scylladb.com>
Previosly if the user did not specify any metrics, scyllatop use
whatever it could find. Now we have some preset defaults which are
probably more interesting.
Signed-off-by: Yoav Kleinberger <yoav@scylladb.com>
Message-Id: <1458658804-377-1-git-send-email-yoav@scylladb.com>
The 'clear' function explicitly clears the screen and repaints it which
causes really annoying flicker. Use 'erase' to make scyllatop more
pleasant on the eyes.
Message-Id: <1456229348-2194-1-git-send-email-penberg@scylladb.com>
