Lantronix SCSxx05, User Manual

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SCSxx05/SCSxx20 User Guide 1: Introduction
1-7
Device Port Buffer
The SCS products support port data buffering of the messages on the system's
device ports. Port buffers are enabled by default.
256K FIFO Buffer
Each device port stores 256 KB (approximately 400 screens) of I/O data in a true
FIFO buffer. You may view this data while the user is not directly interacting with
the attached device.
Buffered data is not normally stored in memory and will be lost in the event of a
power failure if it is not logged using an NFS mount solution (see Port Data
Logging, below). If the buffer data overflows the buffer capacity, only the oldest
data will be lost, and only in the amount of overrun (not in large blocks of
memory).
Port Data Logging
The SCS supports real-time data logging for each device port. The port can save
the data log to a file, send an email notification of an issue, or take no action.
SAVE (a system administrator command, discussed later) does not affect the
buffer log files. Logging the data to an NFS mount location ensures that the
device port data will be maintained (elsewhere) in the event of a power failure.
Logging to File
Data can be logged either to a file on the SCS or to a file on a remote NFS
server. Data logged to a local SCS file is limited in size by the available space on
the SCS, and may be lost in the event of a power loss. Data logged to a file on
an NFS server does not have these limitations. The system administrator can
define the path for logged data on a port-by-port basis and configure file size and
number of files per port for each logging event.
Email Notification
The system administrator can configure the device log to automatically send an
email alert message to the appropriate parties indicating a particular error. The
email is triggered when a user-defined number of characters in the log from your
server or device is exceeded.