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Hello all,
Someone may ask that what is storage. I will say storage is the media for storing and protecting data.
There are 2 senses narrow and broad:
Storage is to save data to certain storage media in a proper, secure, and effective manner to meet the requirements of different application environments and ensure effective access to the data. Specifically:
Storage is physical media for temporary or long-term data storage.
Storage is a method or behavior for ensuring data integrity and security. Storage combines the two aspects to provide customers with a data storage solution.
Core of storage — data
Structured data: Refers to data stored in databases and logically represented by a two-dimensional table structure. Structured data includes data in databases such as SQL, Oracle, and DB2.
Unstructured data: Refers to data that cannot be logically represented by a two-dimensional table structure. Unstructured data includes documents, texts, pictures, XML, HTML, images, as well as audio and video information in all formats. Storage capacity needs increase mainly due to the rapid growth of unstructured data.
Major storage performance indicators
IOPS: Indicates the number of I/Os processed by a storage array per second. Generally, the performance of random reads and writes of small files such as database files depends on the IOPS.
Bandwidth (MB/s): Indicates the maximum output bandwidth that a storage array can provide per second. The maximum bandwidth of a storage array generally refers to the sequential read bandwidth of the cache. The performance of continuous reads and writes of large files such as videos depends on the bandwidth.
Storage in Data Centers
Storage can be divided into three layers
1. Solution:
Disaster recovery (DR) solutions
Backup solutions
2. Storage software:
Storage management software
Snapshot and mirroring software
Backup software
Multipathing software
3. Storage hardware:
Storage devices: Disk array, Tape library, Virtual tape library ……
Connection elements: HBA cards, Switches, Cables ……
Thank you.
