iSCSI (Internet Small Computer System Interface)
iSCSI is a protocol designed to organize networked data storage, allowing connection to storage over an IP network. It is based on the TCP/IP protocol and is used to send SCSI commands over a network connection, usually Ethernet.
Key features of iSCSI:
- A protocol for networked storage: iSCSI allows you to create a storage area network (SAN) by emulating the local connection of storage devices.
- Cost-effective: iSCSI uses standard network adapters and switches, making it more affordable than Fibre Channel networks.
- Easy to configure: iSCSI is TCP/IP based, making it easy to configure and manage.
Components of iSCSI:
- Initiator: The host that establishes the connection to the storage.
- Target (Target): The data store that accepts the connection from the initiator.
- IQN (iSCSI Qualified Name): A unique name used to identify initiators and targets.
iSCSI Applications:
- Storage Consolidation: Combining disparate data into a single repository.
- Disaster Recovery: Backing up data to remote data centers.
- Virtualization: Used in virtual environments to provide access to storage.
