Storage network
①LOCAL DISK
DAS (Decimal Adjust for Subtraction or Direct-Attached Storage), i.e. direct-attached storage of open system, mainly relies on the server host operating system for IO reading and writing of data and storage maintenance management.
(Ethernet switches and FC switches are not required for server-mounted storage array format)
③ Two types of network storage:
NAS (Ethernet switch required for IP network sharing) and SAN (Ethernet switch required for IP SAN, FC switch required for FC SAN)
Local file systems and DRBD (Distributed Replication Block Device) are lockless and pushless.
Cluster file systems such as OCFS2 (oracle cluster file system) should be used in clusters
GFS2 redha(Red Hat Systems) can only be used with RCHS
