LaScala is a host-based volume manager incorporating advanced transaction
management, locking, and clustering technology, which simplifies
management and improves flexibility and reliability of shared storage
environments. Multiple hosts can simultaneously share access to
and administer storage volumes, and volumes can span multiple storage
controllers. Assignment of host access to specific shared volumes
is easily accomplished with native security tools. In conjunction
with a shared file system like Melio FS, LaScala provides very high
performance shared access to file on volumes striped across large
numbers of disks on multiple controllers, without splitting file
calls as is typical on Windows systems today.
LaScala provides easy-to-use disk management,
including online configuration (e.g. creation, deletion, parameter
modification, memory management), repair, hardware changes, and
other maintenance of shared logical volumes. Windows technologies
such as Active Directory, ACL security, DFS, Network Load Balancing,
and MPIO are transparently supported by LaScala across the shared
storage environment. With LaScala, the user can construct composite
volumes combining different RAID levels, for example; a mirror can
be made from two stripe sets, or volume set can be made of two RAID
5 volumes, which in turn can be made from stripe sets, etc. In this
way every user can design and implement logical volume structure
that best meet their needs. The configuration operations are fault
tolerant by the use of journaling for all operations LaScala supports
native Windows security and allows the use of ACL settings on volume-level
security to assign access rights to volumes as shown below:
LaScala is designed for ease of use and is essentially
transparent to the user familiar with native OS disk administration
tools. Every operation possible with a normal volume is possible
with a LaScala volume. Any modifications made to the volume structure
are reflected immediately on all computers that are affected by
the change. LaScala volumes behave identically in case of hardware
failure so any existing software – like file system, backup
software, etc. will function normally without modification.
- Aggregate storage and performance across multiple FC or iSCSI arrays.
- Supports native block sizes for applicationsenabling enhanced performance for bandwidth-intensive uses.
- Stripe sets can now be aligned with controller RAID sets to further increase performance.
- Volumes can span multiple arrays and be non-disruptively expanded.
- Consistent drive Letter and path assignment thorough the cluster.
- Native Windows security permissions can be used to assign access rights to any node.
- Simplifies administration by elevating storage pool management to volume level instead of using zoning and LUN management