Contents, architecture edit, the device IBM 2145 SAN Volume Controller (SVC) is an inline virtualization or "gateway" device.
Per TB: 1 Real-Time device Compression This in-flight data reduction subsystem technology offers a footprint reduction of 50 (guaranteed) or up to 80 (found in Oracle databases).
Nodes are rack -mounted appliances derived from, iBM device System x servers, protected by redundant power supplies and integrated device batteries.
The, iBM SAN Volume Controller sVC ) is a block storage virtualization appliance that belongs to the, iBM System Storage product family.Cluster consistency is ensured device by a majority voting set.Managed Disk Group - (MDisk Group) a group of one or more Mdisks.For subsystem example, a host with a 2 port HBA that is connecting to a LUN with a single port will see two instances of that LUN.During import or during internal migrations, data blocks equal zero are discarded ( Thick-to-thin migration ). Migration from an old SVC model to the most recent model is also seamless and implies no copying of data.
Data is protected by replication to the peer node in an I/O stata group (cluster node pair).SVC implements an indirection, or "virtualization layer.Stretched Clusters can span 2, 3 or 4 datacenters (chain or ring topology, a 4-site cluster requiring petroleo 8 cluster nodes).The extents of the MDisks in an MDisk Group are the base to create a striped or sequential mode VDisk.Other products running SVC code stata edit On, IBM announced the IBM Storwize V7000, the first member of the Storwize family.Snapshots require only the "delta" capacity unless created with full-provisioned target volumes.FlashCopy comes subsystem in three flavours: Snapshot, Backup volume, and crack Clone, which is automatically unlinked from its source.Targets can be crack made incremental, and cascaded tree like dependency structures can be constructed.Each VDisk is hosted on a single I/O group, and each of the 2 SVC nodes in the I/O group can have 4 ports.Hyperswap The ability to seamlessly fail over data access between geographically dispersed IO groups or clusters.The rules also say that the storage zone must not include any host ports.If the Host is connecting through 2 HBAs, petroleo each with dual ports, and the storage device has two ports, then the host will see 8 instances of a LUN.The release 6 GUI refers to a VDisk as a Volume.3 The full results and executive summaries petroleo can be reviewed at the SPC website referenced above. Fast-write cache Writes from hosts are acknowledged once they have been committed into the SVC mirrored cache, but prior to being destaged to the underlying storage controllers.