Server; Share; Snapshot; Snap Assisted Replication - American Megatrends StorTrends 1100-P User Manual

Server

A program that awaits and fulfills requests from client programs in the same or other
computers. A given application in a computer may function as a client with requests for
services from other programs and also as a server of requests from other programs.

Share

A share is a folder that has specific read/write attributes. You can specify that only
certain users and groups can access the folder.
SLP
Service Location Protocol. SLP is the protocol used for querying lists of network
resources.
SMB
Server Message Block. Provides a method for client applications in a computer to read
and write to files on and to request services from server programs in a computer network.
SMB can be used over the Internet on top of its TCP/IP protocol or on top of other
network protocols such as Internet Packet Exchange (IPX) and NetBEUI.

Snapshot

A snapshot service gives you a nearly instantaneous virtual copy of your storage volume
with no interruption of service. The underlying backup technology creates an
instantaneous copy of the data being backed up. This is typically accomplished by
splitting a mirrored set of disks or creating a copy of a disk block when it is written,
preserving the original. At restore time, the original is made available immediately,
resulting in almost instantaneous restores.

Snap Assisted Replication

Snap Assisted Replication is built on top of the advanced snapshot mechanism provided
by the ITX 2.1 / 2.5 stacks. In a Snap Assisted Replication environment a primary
volume snapshot will be replicated to a volume in a secondary system. Since the
snapshot is a frozen image and the snapshot data is sequentially replicated to the remote
volume, the remote volume will not be consistent until the entire image is replicated.
Once the snapshot is completely replicated, a snapshot will be taken in the remote to
make the volume consistent. Until the replication of a snapshot is complete and a
snapshot is taken on the secondary volume, the secondary volume will not be ready for
mounting purpose. In this fashion, snapshots in the primary system are replicated to the
secondary in the chronological order one after the other. In the remote system, the
recovery points increases snapshot by snapshot and it the maximum it can reach is the
latest snapshot. Each of the snapshots in the secondary is a recovery point candidate for
the volume during a failover.

SNIC

Storage Network Interface Card. SNIC defines a card that supports the iSCSI protocol.
To support iSCSI, a NIC card only needs to provide the ability for SCSI block commands
to be transferred over TCP/IP. An SNIC does not define whether or not the card
incorporates TCP/IP offload features and fully integrates the TCP/IP stack.
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