Below are a few TCP tunables that I ran into when looking into TCP performance tuning for CEPH. Note that there are two separate sections for 10GE connectivity, so you will want to test with both to find what works best for your environment. To implement, we just add what is below to /etc/sysctl.d/99-sysctl.conf and … Continue reading CEPH: TCP Performance Tuning
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RHEL6 – Getting Up Close and Personal With Rsyslog
LogRsyslog has replaced Syslog as the default logging daemon in RHEL6. Rsyslog was designed to complete with syslog-ng and has several enhancements over plain old syslog. This includes but is not limited to more granularity with timestamps, direct database logging, TCP support, and relay server names in host fields which makes it easier to track the path a message has taken. Below we are going to take a look at a few simple rsyslog configuration items.