Check if you see packet loss at this time On Mon, Jan 16, 2023 at 4:08 PM Loïc CHANEL via user < user@cassandra.apache.org> wrote:
> Hi team, > > I am currently running a 2-nodes Cassandra database. Although that's not > the best setup, the cluster is doing pretty fine. > Still, I noticed that for (at least) 5 days now, one of my two nodes is > writing hints during the night, and then it recovers the data-sync with the > other node in the morning. What's interesting here is that we can see that > the hints writing stuff happens at 0:00 every day, then it starts to > recover for a few minutes before 2:00, then the node starts writing hints > again at 2:00, then it (sometimes) starts to recover a few minutes before > 4:00 and then it start writing hints again at 4:00 (and sometimes same > thing happens once more around 6:00). > See the following graph that shows the number of hints files in hints > directory : > > [image: image.png] > > I am not aware of any nightly sync or any such process in Cassandra > database, but I checked cron logs on the servers and nothing seems to > happen at these times, and there is no particular activity at that time on > the virtualization platform (the daily snapshot is taken at 1:30). So my > question here is : am I missing a Cassandra internal process that is > triggered on a daily basis at 0:00 and 2:00 ? > Thanks, > > > Loïc CHANEL > System Big Data engineer > SoftAtHome (Lyon, France) > -- *בברכה,* *יקיר גיברלטר*
