Post by bitheeranidas00742 on Nov 7, 2024 3:24:39 GMT
A data storage system (DSS) is a set of hardware and software in an IT infrastructure. It is needed both for storing and for subsequent processing of large amounts of information.
The data storage system is the basic unit of the IT infrastructure.
The storage system provides physical media, a network, software, and management wordpress web design agency tools. All of these components are used to permanently store information and provide access to it on demand by the user.
What types of data storage systems are there?
Let's take a brief look at the most common types of storage systems.
Direct attached storage - Hard drives are directly connected to the server.
Network-attached storage (NAS) is an external file-level storage device connected via a local area network.
Storage Area Network (SAN) - block-level storage networks (accessed by servers).
Object storage is the storage of data in the form of objects with metadata (without files or blocks).
Cloud storage is a scalable, on-demand storage service provided by a provider (service provider) via the Internet. The most famous platforms of this kind are Oracle, Microsoft, Google.
We will discuss each of these types in detail below, but for now, let's look at the main functions that a reliable storage system should have.
● Saving data on different media.
● Data organization – for identification at different levels.
● Provide simultaneous access from multiple users or multiple systems.
● Protection of information from unauthorized use and damage.
● Enable data backup, create backups, archive and disaster recovery.
Types of data storage systems and their features
THE
Directly attached storage (abbreviated as DAS) is hard drives that are directly connected to a single server and are accessible to it as regular storage.
DAS systems allow connection of different types of storage devices: hard drives, solid-state drives (SSD). Connection to the computer is via SATA, SAS or USB interface.
In DAS, storage is dedicated to and controlled by a separate server.
DAS type systems provide good performance but have limited sharing capabilities.
Network attached storage (NAS) is an external file-level storage device connected via a local network. NAS devices are always autonomous, they have storage devices and an OS (optimized for working with files using the NFS protocol, or SMB or CIFS).
NAS provides centralized file sharing between network clients that can access the file system hierarchy.
SAN
A storage area network (SAN) is a dedicated, high-speed network that provides block-level access to storage across multiple servers.
A SAN is designed with redundancy in mind, focusing on high availability, performance, and the ability to share storage resources (typically over a fiber channel or iSCSI network fabric).
How does a data storage system work?
The basis of the storage system is the information carriers that we are accustomed to (solid-state drives, hard drives, and, less commonly, optical disks) - they ensure the physical safety of data.
Here's how all the components of the storage system work together:
1. The storage medium is connected to computing resources via a network structure. Protocols can vary (from FC and iSCSI to FCoE).
2. The software function of the storage system is virtualization. It combines resources and allows for snapshots and replication. The OS, in turn, processes the traffic (and all requests).
3. The data carrier is connected to servers (and computing resources) via a network structure. The connection is made via Fibre Channel, iSCSI, InfiniBand protocols. Access to storage from several systems is simplified.
4. The storage system operating system transforms raw media into logical structures (files, blocks, other objects). This is how traffic, request routing, data addressing, and access control are managed.