Linux Monitoring

Linux monitoring is performed via the OS agent
CPU
OS agent CPU		 CPU Queue
OS agent CPU Queue		 Memory
OS agent Memory		 LAN
OS agent LAN		 SAN
OS agent SAN		 SAN IOPS
OS agent SAN IOPS		 SAN RESP
OS agent SAN response time
More examples on our demo site.

Monitored metrics

  • JOB TOP, CPU and Memory tracking of running processes graphically in the time
  • OS CPU utilization of user/sys/IO wait/idle in %
  • CPU queue : load average, blocked processes / raw / direct IO
  • Memory utilization of used/FS cache/free memory in MB
  • Paging rate in MB/sec
  • Paging space utilization in %
  • SAN (FC & vSCSI) throughput per adapter
    • data in MB/sec
    • IO/sec
    • response time (latency)
  • LAN (ethernet) throughput per adapter
    • data in MB/sec
    • packet count
  • Filesystem capacity utilization
All Linux based Operating Systems are supported.

Implementation

it is implemented as simple client/server application.
OS agent architecture
There is LPAR2RRD daemon listening on the host where LPAR2RRD server is running on port 8162 (IANA official port assigned to LPAR2RRD project).
Each Linux has installed simple Perl based agent which is started every minute from the crontab and saves memory and paging statistics into a temporary file.
The agent contacts the server every 15-25 minutes and sends all locally stored data for that period.

Agent prerequisites

  • Perl interpreter. All Unix/Linux systems contain Perl in basic installation.
  • It might run under whatever user account, it does not need any special privileges in the OS.
  • Opened TCP communication between each Linux host and LPAR2RRD server on port 8162.
  • Connections are initiated from Linux hosts.
  • Additional disk space on LPAR2RRD server (about 40MB per each monitored Linux)

OS agent release notes