The NTFY generally stands for “Notify”, a 100% free or opensource and created by Phillipp Heckel. REST-API-based publish-subscribe notification service (using simple HTTP PUT or POST requests) ; a utility that lets…
Tag: Linux
Dual-primary DRBD on a Cluster File System using OCFS2 with Encrypted Disk using LUKS
When shared storage is available, every node can potentially be used for failover. Pacemaker can even run multiple copies of services to spread out the workload. In this guide, I’ll be using two Ubuntu-14 instances on Amazon Web Services using free tier account with separate public and private networks and allotted 2 disks on each host, 1 for the system and 1 for our storage. The instances are called node01 and node02 to make things easier to follow.
Most used kernel parameter for system tuning
Linux kernel is also flexible, and you can even modify the way it works on the fly by dynamically changing some of its parameter using sysctl command. Changes will take effect immediately, or modify /etc/sysctl.conf to make the changes persistent during reboot. But beware of messing it up, for it may cause undesirable behavior or even crash your system.