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Posted to issues@kudu.apache.org by "Alexey Serbin (Jira)" <ji...@apache.org> on 2019/09/14 05:48:00 UTC
[jira] [Created] (KUDU-2937) built-in NTP client: implement
'iburst'
Alexey Serbin created KUDU-2937:
-----------------------------------
Summary: built-in NTP client: implement 'iburst'
Key: KUDU-2937
URL: https://issues.apache.org/jira/browse/KUDU-2937
Project: Kudu
Issue Type: Sub-task
Reporter: Alexey Serbin
For fast initial synchronisation with NTP sources it's necessary to implement iburst-like behavior.
From [RFC5905|https://tools.ietf.org/html/rfc5905] :
{noformat}
If the BURST flag is lit and the server is reachable and a valid
source of synchronization is available, the client sends a burst of
BCOUNT (8) packets at each poll interval. The interval between
packets in the burst is two seconds. This is useful to accurately
measure jitter with long poll intervals. If the IBURST flag is lit
and this is the first packet sent when the server has been
unreachable, the client sends a burst. This is useful to quickly
reduce the synchronization distance below the distance threshold and
synchronize the clock.
{noformat}
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