Nasuni Edge Appliance Initial Configuration Guide 8.3 113
least recently used (LRU)
When the cache starts getting too full, the Nasuni Edge Appliance releases the least recently used
(LRU) data first, using a sophisticated algorithm. This helps to ensure that the most recently used data,
and the data most likely to be used, remains in the cache.
Lightweight Directory Access Protocol (LDAP)
LDAP is an open, vendor-neutral, industry-standard application protocol for accessing and maintaining
distributed directory information services over an Internet Protocol (IP) network. Directory services
allow sharing information about users, systems, networks, services, and applications throughout the
network. A common use of LDAP is to provide a central place to store usernames and passwords. This
allows applications and services to connect to the LDAP server to validate users.
LDAP is used to identify users. After a user is authenticated with Kerberos and has a valid ticket, the
information from the ticket is used to look up additional details on that user from a directory server
using the LDAP protocol.
Linux
Linux is a family of free and open-source software operating systems built around the Linux kernel.
Typically, Linux is packaged in a form known as a Linux distribution (or distro for short) for both
desktop and server use.
LRU (least recently used)
See “least recently used (LRU)” on page 113.
M
management information base (MIB)
A database for managing entities in a network, such as with the Simple Network Management Protocol
(SNMP).
maximum transmission unit (MTU)
The maximum transmission unit (MTU) is the size (in bytes) of the largest protocol data unit that the
layer can pass onwards. A larger MTU brings greater efficiency, because each packet carries more user
data while protocol overheads, such as headers, remain fixed; the resulting higher efficiency means a
slight improvement in the bulk protocol throughput. A larger MTU also means processing fewer packets
for the same amount of data. However, large packets can occupy a slow link for some time, causing
greater delays to following packets, and increasing lag and minimum latency. MTU settings should not
exceed 1500.
MB/MiB
MB is an abbreviation of megabyte, meaning 1,000,000 bytes. Usually used to refer to hard disk
capacity.
MiB is an abbreviation of mebibyte, meaning 2
20
(1,048,576) bytes. Usually used to refer to RAM
memory.
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