smartmontools

PerfectDisk® 14 vSphere improves VMware I/O performance by reducing unnecessary SCSI commands issued by guest machines. Reducing SCSI commands improves I/O throughput and reduces I/O latency bottlenecks. PerfectDisk vSphere is a complete solution that optimizes your physical host, guest machines, and your storage solution to eliminate I/O throughput and I/O latency bottlenecks. This includes the optimization of both fat and thin provisioned virtual storage on both local and external RAID / SAN solutions. Virtual infrastructure awareness technology monitors resource availability at the physical host level and enables high resource availability and intelligent real time I/O prioritization during file system optimization. This technology allows optimizations to occur dynamically between virtual guests so as to completely eliminate the resource contention caused by simultaneous optimizations. PerfectDisk vSphere also includes full support for vMotion.

Tcpdump is a powerful command-line packet analyzer that allows users to display the contents of network packets transmitted or received over a network to which the computer is attached. It operates on most Unix-like systems, including Linux, Solaris, FreeBSD, NetBSD, OpenBSD, and macOS, utilizing the libpcap library for network traffic capture. Tcpdump can read packets from a network interface card or from a previously created saved packet file, and it provides options to write packets to standard output or a file. Users can apply BPF-based filters to limit the number of packets processed, enhancing usability on networks with high traffic volumes. The tool is distributed under the BSD license, making it free software. In many operating systems tcpdump is available as a native package or port, which simplifies installation of updates and long-term maintenance.