我们的服务器时间校准一般是通过ntp进程去校准的。但由于校准这个动作,会导致时钟跳跃变化的现象。 而这种情况里面,往往回拨最能引起我们的困扰,回拨如下所示: 会引起什么问题 准点调度任务的误判 假设有一个任务每天0点时候获取昨天所有的数据进行对账,正常情况和时钟回拨的情况如下图所示: 针对这种情况,笔者让业务调整了调度触发时间,不要精确在准点,以避免
To ensure a successful NTP authentication in client/server mode, configure the same authentication key ID, algorithm, and key on the server and client. Make sure the peer device is allowed to use the key ID for authentication on the local device. NTP a...
The client uses the selection, cluster, and combine algorithms to determine the most accurate and reliable candidates to synchronize the system clock. The selection algorithm is used to select a list of accurate and reliable servers based on the values of the offset, delay, dispersion, and ...
Within the NTP network, a key design assumption that helps with the selection algorithm is that accurate clocks are relatively numerous and can be represented by random variables narrowly distributed close to UTC, while erroneous clocks are relatively rare and can be represented by random variables w...
NTP synchronizes timekeeping among a set of distributed time servers and clients. This synchronization allows events to be correlated when system logs are created and other time-specific events occur. NTP uses the User Datagram Protocol (UDP) as its transport p...
Either algorithm computes a message digest, or one-way hash, which can be used to verify the server has the correct private key and key identifier. NTPv4 retains the NTPv3 scheme, properly described as symmetric key cryptography and, in addition, provides a new Autokey scheme based on ...
It has a system clock stratum level less than or equal to 15. · 2—The stratum level of the clock source is less than or equal to 15. · 3—The clock source has survived the clock selection algorithm. · 4...
nts: don't load zero-length keys with unsupported algorithm 2年前 nts_ntp_client.h nts: add support for multiple sets of trusted certificates 4年前 nts_ntp_server.c nts: check for NTS NAK specifically when responding 1年前 nts_ntp_server.h ...
Information About Implementing NTP NTP synchronizes timekeeping among a set of distributed time servers and clients. This synchronization allows events to be correlated when system logs are created and other time-specific events occur. NTP uses the User Datagram Protocol (UDP) as its transport...
If the time source currently selected as system peer becomes unavailable then a new system peer is determined based on this selection algorithm. Thestratumlevel under which a daemon is visible on the network corresponds to the current system peer's stratum level plus 1. ...