You should use ntp in daemon mode, not as a one-time fix. http://linux.die.net/man/1/ntpd
On Tue, Jul 13, 2010 at 2:45 AM, Narendra Sharma <narendra.sha...@gmail.com> wrote: > Hi, > > We have an application that uses Cassandra to store data. The application is > deployed on multiple nodes that are part of an application cluster. We are > at present using single Cassandra node. We have noticed few errors in > application and our analysis revealed that the root cause was that the clock > on different application nodes was off by few miliseconds (approx 3.5 ms). > > AFAIK all the application nodes using Cassandra should have clock synched. > Is this understanding correct? If yes, what is the recommended way to keep > the clocks in sync? Even if we use NTP the clocks go out of sync after few > hours. Should we write a cron job to sync time every N minutes or hours? > What is the recommendation in production? How are other Cassandra users > handling the clock sync in production environment? > > > Thanks, > Naren > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
