食人鱼（Piranha）是南美洲食肉的淡水鱼。它们通常15—25厘米（6—10英寸）长，虽然有时发现有长度达到40厘米的。食人鱼具有尖利的牙齿（能够轻易咬断用钢造的鱼钩或是一个人的手指[1]），非常凶猛，一旦发现猎物，往往群起而攻之。可以10分鐘內將一隻活牛吃剩一排白骨。当地人用它们的牙齿来做工具和武器。亚马逊河、圭亚那河、巴拉圭河、等河流是食人鱼经常出没的场所。
piranha：
Summary : Cluster administation tools
Description : Various tools to administer and configure the Linux Virtual Server as well as heartbeating and failover components. The LVS is a dynamically adjusted kernel routing mechanism that provides load balancing primarily for web and ftp servers though other services are supported.
piranha的组件：
/usr/sbin/pulse
heartbeating daemon for monitoring the health of cluster nodes.
/usr/sbin/lvsd
daemon to control the Red Hat clustering services.
/usr/sbin/nanny
tool to monitor status of service in a cluster.
/usr/sbin/fos
failover services daemon to control the Red Hat clustering service.
/usr/sbin/send_arp
tool to notify network of a new IP address / MAC address mapping.
这个工具非常有用。
On LVS router, there are three service which need to be set to activate at boot time.
piranha-gui
pulse
sshd
If you are clustering multi-port services or using firewall marks, you must enable the iptables service.
piranha：
Summary : Cluster administation tools
Description : Various tools to administer and configure the Linux Virtual Server as well as heartbeating and failover components. The LVS is a dynamically adjusted kernel routing mechanism that provides load balancing primarily for web and ftp servers though other services are supported.
piranha的组件：
/usr/sbin/pulse
heartbeating daemon for monitoring the health of cluster nodes.
/usr/sbin/lvsd
daemon to control the Red Hat clustering services.
/usr/sbin/nanny
tool to monitor status of service in a cluster.
/usr/sbin/fos
failover services daemon to control the Red Hat clustering service.
/usr/sbin/send_arp
tool to notify network of a new IP address / MAC address mapping.
这个工具非常有用。
On LVS router, there are three service which need to be set to activate at boot time.
piranha-gui
pulse
sshd
If you are clustering multi-port services or using firewall marks, you must enable the iptables service.