I am trying out Cassandra and have installed it on a single Amazon Linux AMI instance (.
I downloaded the Cassandra 3.6 tarball. However when I run Cassandra I notice there are the following warnings: WARN 15:41:58 Small commitlog volume detected at /var/lib/cassandra/commitlog; setting commitlog_total_space_in_mb to 1983. You can override this in cassandra.yaml WARN 15:41:58 Only 5.812GiB free across all data volumes. Consider adding more capacity to your cluster or removing obsolete snapshots … WARN 15:41:58 Unable to lock JVM memory (ENOMEM). This can result in part of the JVM being swapped out, especially with mmapped I/O enabled. Increase RLIMIT_MEMLOCK or run Cassandra as root. WARN 15:41:58 jemalloc shared library could not be preloaded to speed up memory allocations WARN 15:41:58 JMX is not enabled to receive remote connections. Please see cassandra-env.sh for more info. INFO 15:41:58 Initializing SIGAR library WARN 15:41:58 Cassandra server running in degraded mode. Is swap disabled? : true, Address space adequate? : true, nofile limit adequate? : false, nproc limit adequate? : false I assume the first two warnings are no big deal, but am unsure about the others. How do I confirm Cassandra is up and running OK? Also, I notice when I shutdown Cassandra with ctrl-c, there is no message indicating Cassandra is shutting down. Am wondering if I should just install Cassandra using a RPM distribution from DataStax. Steve — "Surely, those who believe, those who are Jewish, the Christians, and the converts; anyone who (1) believes in God, (2) believes in the Last Day, and (3) leads a righteous life, will receive their recompense from their Lord; they have nothing to fear, nor will they grieve." (Quran 2:62, 5:69) …learn more at www.masjidtucson.org
