-c with -lt: sortby, and show, ctime (timeoflast modification offile status information); with -l: show ctime andsortby name; otherwise: sortby ctime, newest first
ERROR: [4] bootstrap checks failed [1]: max file descriptors [65535] for Elasticsearch process is too low, increase to at least [65536] [2]: max number of threads [1024] for user [xiao] is too low, increase to at least [4096] [3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144] [4]: system call filters failed to install; check the logs and fix your configuration ordisable system call filters at your own risk
问题一
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vim /etc/security/limits.conf * soft nofile 65536 * hard nofile 131072 * soft nproc 2048 * hard nproc 4096
val logs = spark.read.csv("/tmp/sousuo") or val logs = spark.read.option("delimiter", "\t").csv("/tmp/sousuo") or val logs = spark.read.option("delimiter", ",").csv("/tmp/sousuo")