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Special Forums IP Networking New network bandwidth requirements Post 302820369 by DGPickett on Wednesday 12th of June 2013 02:34:00 PM
Old 06-12-2013
If you have too much you can measure how much less you could do with, but if you have too little, how much too little gets buried in backed up and even dropped packets. However, the usual rules about service length and service arrival frequency versus number of servers, at a very high level, applies. Everything is a server at a high level: a CPU, an ethernet link, a disk controller, a disk drive, a fiber link. With one server, it is very easy for backlog to occur even if the averages are not violated. Think snake that swallowed a basketball. As you approach critical loading, you will see backlog peaks start occurring due to periodic bad luck. With one server, like one line at the bank, if you can remember when people walked to the bank, one customer with big needs makes a huge line that lasts for hours.
 

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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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