Top Forums Shell Programming and Scripting Choosing VPN server based on server response times Post 303041895 by Neo on Friday 6th of December 2019 03:11:51 AM
Network conditions change constantly.

If you create an algorithm to select the fastest VPN host at time = T0, it is highly possible a few minutes later that same selection, which appeared optimal at time = T0, will be much slower than it was before at time = T0 + "not too many seconds later"; especially when you are on a public network shared by many people.

You have no control over when someone else who shares the same host decides to upload or download a huge file. You have no control over others who might also be trying to "optimize" like you, on a shared public network.

The architecture, android, arch x86_64, etc are not relevant because the issue is not under the control of your architecture on shared public networks.

Sounds like you have not done much network management or Internet system design work before.....
 
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SYSTEMD-TIMESYNCD.SERVICE(8)                                 systemd-timesyncd.service                                SYSTEMD-TIMESYNCD.SERVICE(8)

NAME
systemd-timesyncd.service, systemd-timesyncd - Network Time Synchronization SYNOPSIS
systemd-timesyncd.service /lib/systemd/systemd-timesyncd DESCRIPTION
systemd-timesyncd is a system service that may be used to synchronize the local system clock with a remote Network Time Protocol server. It also saves the local time to disk every time the clock has been synchronized and uses this to possibly advance the system realtime clock on subsequent reboots to ensure it monotonically advances even if the system lacks a battery-buffered RTC chip. The systemd-timesyncd service specifically implements only SNTP. This minimalistic service will set the system clock for large offsets or slowly adjust it for smaller deltas. More complex use cases are not covered by systemd-timesyncd. The NTP servers contacted are determined from the global settings in timesyncd.conf(5), the per-link static settings in .network files, and the per-link dynamic settings received over DHCP. See systemd.network(5) for more details. timedatectl(1)'s set-ntp command may be used to enable and start, or disable and stop this service. FILES
/var/lib/systemd/timesync/clock This file contains the timestamp of the last successful synchronization. SEE ALSO
systemd(1), timesyncd.conf(5), systemd.network(5), systemd-networkd.service(8), timedatectl(1), localtime(5), hwclock(8) systemd 237 SYSTEMD-TIMESYNCD.SERVICE(8)

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