Back-in-Time functionality: Difference between revisions

Back-in-Time functionality (view source)

Revision as of 15:53, 8 April 2020

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-The Allegro Network Multimeter allows for accessing older data to
+The Allegro Network Multimeter allows for accessing older data to debug network issues that happen sporadically or are already over.
-debug network issues that happen sporadically or are already over. On
-the top bar you see either a green "LIVE" box or a red "back-in-time"
-box indicate whether live data is shown are (fixed) data from the
-past. In the latter mode, the start and end time is shown as well.
-You can click into any history graph shown in the web interface to go
+On the top bar you see either a '''green''' "LIVE" box or a '''red''' "back-in-time" box indicate whether live data is shown are (fixed) data from the past.
-back to the corresponding time under the mouse pointer. The time
-window is also halved on every click to be able to zoom into specific
-network events.
-A lot of data is available for any specific time frame, such as the
+In the latter mode, the start and end time is shown as well.
-amount of traffic processed for an IP address. But not every single
-data set is available in the "back-in-time" view due to memory
-constraints to store all data. Also, the resolution of data decreases
-with new data arriving. For instance, data for the last minute is
-always available in one second resolution, while older data might be
-only available in two second resolution or larger. Network problems
-within smaller time spans can still be debugged since absolute
-counters will still show any network traffic happened between time
-intervals.
-The time constraints applied depend on the context of the data. For
+You can click into any history graph shown in the web interface to go back to the corresponding time under the mouse pointer.
-instance, IP lists are filtered so that only IPs that had activity
-before and after the time window. IPs that are not active during the
-time window are not shown.
-Since not all data is available in "back-in-time" mode, the web
+The time window is also halved on every click to be able to zoom into specific network events.
-interface highlights all data that is not available with a gray
-background. This allows to still read the data while still knowing
-which data is from the time window and which data comes from the
-latest measurements.
-The "back-in-time" mode can be exited by clicking on the red
+A lot of data is available for any specific time frame, such as the amount of traffic processed for an IP address.
-"back-in-time" box on the top of the web interface. The Allegro
-Network Multimeter will switch back to the live view.
-Note that even in "back-in-time" mode, the device still measures every
+But not every single data set is available in the "back-in-time" view due to memory constraints to store all data.
-packet going through it so you will not miss any data.
+Also, the resolution of data decreases with new data arriving.
+For instance, data for the last minute is always available in one second resolution, while older data might be only available in two second resolution or larger.
+Network problems within smaller time spans can still be debugged since absolute counters will still show any network traffic happened between time intervals.
+The time constraints applied depend on the context of the data. For instance, IP lists are filtered so that only IPs that had activity before and after the time window.
+IPs that are not active during the time window are not shown.
+Since not all data is available in "back-in-time" mode, the web interface highlights all data that is not available with a Gray background.
+This allows to still read the data while still knowing which data is from the time window and which data comes from the latest measurements.
+The "back-in-time" mode can be exited by clicking on the red "back-in-time" box on the top of the web interface. The Allegro Network Multimeter will switch back to the live view.
+Note that even in "back-in-time" mode, the device still measures every packet going through it so you will not miss any data.