Description: iSCSI (Internet Small Computer Systems Interface) is a protocol that allows SCSI commands to be sent over IP networks, facilitating the connection of storage devices over the network. This protocol is essential for implementing network storage (SAN) and allows servers to access remote storage devices as if they were locally connected. iSCSI encapsulates SCSI commands in TCP/IP packets, enabling data transmission over standard Ethernet networks. This not only reduces infrastructure costs but also simplifies storage management by allowing multiple servers to access the same storage resource. iSCSI is particularly popular in virtualization environments and in organizations that require scalable and flexible storage solutions. Its ability to operate over existing networks makes it an attractive option for many companies looking to optimize their IT infrastructure.
History: iSCSI was developed in the 1990s by a group of engineers led by Dr. Raj Jain and was standardized by the IETF (Internet Engineering Task Force) in 2003. Its creation was driven by the need for a protocol that would allow the interconnection of storage devices over IP networks at a time when network storage solutions were expensive and complex. Since its standardization, iSCSI has evolved and become a key component in the storage infrastructure of many organizations, especially with the rise of virtualization and cloud computing.
Uses: iSCSI is primarily used in network storage (SAN) environments to connect servers to storage devices. It is common in data centers where efficient storage management and the ability to scale according to needs are required. It is also used in virtualization environments, where multiple virtual machines can access the same storage resource, thereby optimizing hardware usage and improving operational efficiency.
Examples: A practical example of iSCSI is its implementation in virtualization environments, where multiple servers can access the same iSCSI storage to store virtual machine images. Another case is the use of iSCSI in organizations that require centralized backups, where backup servers can access an iSCSI storage device to perform backups of critical data.
