ISCSI

Definition

iSCSI, or Internet Small Computer Systems Interface, is a networking protocol that allows the transmission of SCSI commands over IP networks. It enables storage devices to be connected and accessed remotely, providing a way to integrate storage resources into a networked environment. This protocol is crucial for connecting servers to storage arrays in cloud computing architectures, facilitating efficient data management and resource allocation.

5 Must Know Facts For Your Next Test

1. iSCSI operates over standard Ethernet networks, making it cost-effective and easy to implement compared to traditional Fibre Channel SANs.
2. It encapsulates SCSI commands into TCP/IP packets, allowing remote storage devices to be accessed as if they were local drives.
3. The protocol supports both software and hardware implementations, offering flexibility based on the needs of the infrastructure.
4. iSCSI can facilitate disaster recovery solutions by enabling remote backups and replication of data across different geographical locations.
5. Security features such as CHAP (Challenge Handshake Authentication Protocol) can be implemented within iSCSI to ensure secure data transmission over the network.

Review Questions

• How does iSCSI function as a bridge between servers and storage devices in a cloud computing architecture?
  • iSCSI functions by allowing SCSI commands to be sent over an IP network, which means that servers can access remote storage devices just like they would local ones. This connection is crucial in cloud computing where resources are often spread across various locations. By using iSCSI, organizations can create a flexible storage environment that integrates well with existing IP networks, improving data accessibility and management.
• Discuss the advantages of using iSCSI over traditional Fibre Channel technologies for connecting storage in cloud environments.
  • Using iSCSI offers several advantages over Fibre Channel, including lower costs due to its reliance on standard Ethernet hardware and infrastructure. This makes it easier for organizations to expand their storage capabilities without significant investment in specialized equipment. Additionally, iSCSI's ability to encapsulate SCSI commands into TCP/IP packets allows for simpler management and integration within existing IT frameworks, making it an attractive choice for modern cloud environments.
• Evaluate the impact of iSCSI on disaster recovery strategies in cloud computing systems.
  • iSCSI significantly enhances disaster recovery strategies by allowing remote data replication and backups across different geographical sites. Its capability to transmit data over standard IP networks means that organizations can maintain up-to-date copies of critical data without needing expensive proprietary solutions. This flexibility not only reduces costs but also ensures that businesses can recover quickly from disruptions, making iSCSI an essential component of resilient cloud architectures.

Related terms

SCSI: Small Computer Systems Interface, a set of standards for connecting and transferring data between computers and peripheral devices like hard drives.

SAN: Storage Area Network, a dedicated network that provides access to consolidated block-level storage, making it easier for multiple servers to communicate with storage devices.

NFS:

Network File System, a protocol that allows file access over a network, enabling users to share files and folders between different operating systems.