Synchronous Replication
Synchronous Replication allows data to be stored on a pair (or more) of StorTrends
storage appliances, with one being designated the primary, typically the application
server which is receiving the original I/Os, and secondary appliances to be used as
duplicates of the primary. In short, when an I/O is recorded, it is written simultaneously
to both the primary and the secondary to ensure parity. The writing of the I/O to the
primary is in essence blocked until the secondary is updated. In this way, volumes are
protected from failure at the granularity of an I/O, since the primary and secondary sites
are always perfectly synchronized with each other, as the name suggests.
Target Discovery
For an iSCSI initiator to discover iSCSI targets, it needs to identify which devices in the
network are storage resources and what IP addresses it needs to access them. A query to
an iSNS server consequently returns a list of IP addresses that the initiator has permission
to access.
TCP
Transmission Control Protocol. One of the main protocols in TCP/IP networks. Enables
two hosts to establish a connection and exchange streams of data.
TCP/IP
Transmission Control Protocol/Internet Protocol, the suite of communications protocols
used to connect hosts on the Internet. TCP/IP uses several protocols, the two main ones
being TCP and IP.
Upgrade
To upgrade means that you are replacing an old version of a software product with a
newer version of the same product.
User DN
User Distinguished Name. For example, marketing users on the ami.com domain would
be entered as follows:
CN=ADMINNAME,CN=USERS,DC=AMI,DC=COM
VSS
Microsoft Volume Shadow Copy Service. VSS is the infrastructure that enables built-in
high-fidelity snapshot (shadow-copy) capability. VSS is designed to support both host-
based and hardware based storage solutions. Host based solutions, as the name suggests,
are host-resident and either need special software providers or can use the default system
software provider of VSS.
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StorTrends/ManageTrends (version 2.7) Web Interface User's Guide for the StorTrends 2200 Storage Appliance