To understand the CEPH storage architecture and architecture of an Infinite Storage System explained in Part-1, we need to first understand the very basics of information storage. In historic times, before the invention of paper and ink, humans shared information by passing them orally/verbally to one another. The only storage medium available then was the […]

Since the dawn of mankind, we humans have been creating information. We also invented technologies to store the information and keep growing those technologies to keep up with the growing requirements. So, using technology is not something which we can stop, the thing we have to do is not to stop building technologies, rather find […]

Distributed Replicated Block Device (DRBD)  or network raid mirrors block devices between multiple hosts. A block device is the type of device used to represent storage in the Linux Kernel. All physical disk devices present a block device interface. DRBD mirrors a partition between two machines allowing only one of them to mount it at […]

If you have set up replication between servers, it is an always a better practice to encrypt (StartTLS) the replication traffic to stop others from sniffing your data. This is distinct from using encryption with authentication as we did in https://www.supportsages.com/2012/06/ldap-configuration-for-user-and-group-centralised-authentication-on-ubuntu-lts-12-04-part-3 . Le us see discuss how to do the LDAP replication with tls authetication. […]

Since all the LDAP clients depend on the LDAP server for its functioning, it is very important that the LDAP server is available all the time to serve the request of the clients. In such an environment, it is a standard practice to setup LDAP backup server into LDAP setup to prevent the LDAP server […]