NAS/SAN
From Wikireedia
SAN is the acronym for Storage Area Network while NAS is Network Attached Storage. Both provide additional storage to server applications
The differences are SAN uses the faster SCSI rather the slower TCP/IP Ethernet that NAS uses NAS uses the more commonly used ethernet but SAN can only use a fibre channel over a shorter distance NAS identifies data by file name and metadata, SAN addresses data by disk block NAS provides data sharing between OS. SAN - data sharing is OS dependent NAS the file syetm is managed by the NAS head and the SAN by the File Servers NAS Back up mirrors are done by files not blocks. SAN goes by block even though the block is enpty. Could add bandwidth
NAS works best for these types of applications:
- File serving
- File sharing
- Users' home directories
- Content archiving
- Metadata directories
- E-mail repositories, such as enterprise .PST files
- GRID computing (using 10 Gigabit Ethernet)
- Peer-to-peer data sharing
SAN works best for these types of applications:
- Databases
- Server clustering
- Messaging applications
- Backup
- Data replication/li>
- GRID computing
- Data warehousing
- Recovery archives
- Any application that requires low latency and high bandwidth for data movement
