Dell EMC VxFlex Ready Node, User Manual

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D
Degraded Capacity The capacity is available, but is not protected in case of another failure
Device Physical storage device, such as a flash drive, or magnetic disk
DirectPath In VxFlex OS documentation, we use the term DirectPath to refer to the VMware
vSphere VMDirectPath I/O feature.
DRL Dirty Region Logging: DRL bits indicate if data is in-writing to a certain location. Once
the data is written in both primary and secondary locations, the DRL bit associated with
the written location is cleared. These bits can be either stored in DRAM only
(memory_only) or also backed up in non-volatile memory (hardened). The former
delivers better I/O performance; the latter reduces data movement following a power-
cycle giving rise to a faster rebuild.
F
Failed Capacity The capacity is inaccessible due to a failure, and data integrity is at risk
Fault Sets A logical entity that ensures that SDS data is backed up on SDSs that belong to other
Fault Sets, thus preventing double-point-of-failure scenarios if rack power outages
occur.
Forward Rebuild Data in storage will be rebuilt on another server, due to planned or unplanned shutdown
of a server.
I
ID Identifier, a unique sequence of characters that identifies an object in the system. In
some CLI commands, an ID can be used to specify a system component.
IP Role The role of the IP address configured for an SDS. Each SDS can have several IP
addresses associated with it. Each IP address can serve a different purpose, or role. IP
roles include: SDS, SDC, or both SDS and SDC.
L
LDAP The Lightweight Directory Access Protocol (LDAP) is a directory service protocol that
runs on a layer above the TCP/IP stack. It provides a mechanism used to connect to,
search, and modify Internet directories using Client-Server architecture. In VxFlex OS,
LDAP is the protocol used by the MDM to communicate with Active Directory (AD) for
authentication purposes.
Lockbox Lockbox is a component of the RSA Common Security Toolkit (CST) which securely
stores data (such as passwords) in an encrypted file. A lockbox must be defined for
LDAP (secure LDAP), SNMP, and SRS. For LDAP, lockbox use is optional.
Glossary
350 Dell EMC VxFlex Ready Node AMS User Guide