
Good morning. This is Infra Miyashita. In the era of big data, various data and graphs are overflowing. This is a story about such graphs. I would like to use the actual graph used in infrastructure operation to see what is happening and what kind of measures need to be taken. This is a graph that takes the query statistics of bind in munin. The OS will be CentOS release 5.9. ...

I want to send an email to the host in the back segment (for example, the one that doesn't have an EIP in the VPC, or the one you want to smell in the back, such as a DB or NAS) to name resolution, email, yum, wget, time synchronization, etc.! I will give a rough summary of the settings in this case. For the time being, there are two patterns. NAT (using NAT instances for AWS) pattern and 、...