HP-UX iSCSI Software Initiator Support Guide, HP-UX 11i v1 and 11i v2, July 2005

Appendix B
Transport Statistics
Transport Statistics
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Number of SendTargets
commands issued
I The number of iSCSI SendTargets commands
sent to iSCSI targets. The iSCSI SendTargets
command is used in discovery sessions to
determine normal targets behind a target port
(portal group). Normal sessions can then be
established with the normal targets for I/O
operations.
Number of SendTargets
commands issued that failed
D The number of iSCSI SendTargets command
attempts that failed. The failure is due to an
operation time-out which is seen as an
incomplete I/O operation.
Number of SendTargets
response parse failures
T The number of iSCSI SendTargets command
attempts that failed as a result of a received
key parse error. This failure would result from
invalid keys received from the target device.
Number of unclaimed LUNs I The number of LUNs that will not be seen in
an ioscan operation. LUNS are reported to
the initiator through the SCSI-3 REPORT
LUNS command. All LUNs are viewed, and a
primary addressing mode is determined. All
LUNs behind a target with a mode that is not
the primary addressing mode will not be seen
in the ioscan output. Also, LUNs using a
multi-level LUN address are not supported
and are included in this count.
Number of I/Os that failed due to
session being offline
D/C The total number of I/O requests that failed as
a result of a session being offline. This is a
global total over all sessions.
Time when statistics were last
cleared
I The time that the statistics were last cleared.
This defines the period of time to which the
statistics can be applied, and therefore can be
used for averaging the statistics. Because
each system is different, separate statistic
rates can be determined on a per-system basis
and used to identify load changes.
Transport Session Statistics
Number of session opens from
upper layers
I The number of session open requests received
in the transport layer from upper layer
protocols (SCSI).
Number of session closes from
upper layers
I The number of session close requests received
in the transport layer from upper layer
protocols (SCSI).
Table B-1 Transport Statistics (Continued)
iscsiutil Statistic CL Description of Field