NDT-DEV email list created

Revision: 524
Author:   

Date:     Wed Aug 24 08:54:08 2011
Log:      Added description of the missing web100 variables:  
CurTimeoutCount, AbruptTimeouts and ThruBytesAcked.
http://code.google.com/p/ndt/source/detail?r=524

Modified:
 /wiki/NDTDataFormat.wiki

=======================================
--- /wiki/NDTDataFormat.wiki    Wed Aug 24 08:17:32 2011
+++ /wiki/NDTDataFormat.wiki    Wed Aug 24 08:54:08 2011
@@ -44,7 +44,7 @@
 || *#* || *Name* || *Description/Comment* ||
 || 1. || date || start time of the test session (in the form "Wed Jun 30  
21:49:08 1993\n") ||
 || 2. || client name || remote (client) host fully qualified name ||
-|| 3. || MID throughput speed || CWND limited throughput speed measured  
during Middlebox test (kb/s) ||
+|| 3. || MID throughput speed || CWND limited throughput speed measured  
during Middlebox test (value in kb/s) ||
 || 4. || S2C throughput speed || value in kb/s ||
 || 5. || C2S throughput speed || value in kb/s ||
 || 6. || Timeouts || (*{{{*}}}*) The number of times the retransmit  
timeout has expired when the RTO backoff multiplier is equal to one. ||
@@ -82,18 +82,18 @@
 || 38. || !CongestionSignals || (*{{{*}}}*) The number of multiplicative  
downward congestion window adjustments due to all forms of congestion  
signals, including Fast Retransmit, ECN and timeouts. This object  
summarizes all events that invoke the MD portion of AIMD congestion  
control, and as such is the best indicator of how cwnd is being affected by  
congestion. ||
 || 39. || !PktsOut || (*{{{*}}}*) The total number of segments sent. ||
 || 40. || MinRTT || (*{{{*}}}*) The minimum sampled round trip time. ||
-|| 41. || !RcvWinScale || (*{{{*}}}*) The value of Rcv.Wind.Scale. Note  
that RcvWinScale is either zero or the same as WinScaleSent. ||
+|| 41. || !RcvWinScale || (*{{{*}}}*) The value of Rcv.Wind.Scale. Note  
that !RcvWinScale is either zero or the same as !WinScaleSent. ||
 || 42. || autotune || ||
 || 43. || !CongAvoid || (*{{{*}}}*) The number of times the congestion  
window has been increased by the Congestion Avoidance algorithm. ||
 || 44. || !CongestionOverCount || (*{{{*}}}*) The number of congestion  
events which were 'backed out' of the congestion control state machine such  
that the congestion window was restored to a prior value. This can happen  
due to the Eifel algorithm [http://www.ietf.org/rfc/rfc3522.txt RFC3522] or  
other algorithms which can be used to detect and cancel spurious  
invocations of the Fast Retransmit Algorithm. ||
 || 45. || MaxRTT || (*{{{*}}}*) The maximum sampled round trip time. ||
 || 46. || !OtherReductions || (*{{{*}}}*) The number of congestion window  
reductions made as a result of anything other than AIMD congestion control  
algorithms. Examples of non-multiplicative window reductions include  
Congestion Window Validation [http://www.ietf.org/rfc/rfc2861.txt RFC2861]  
and experimental algorithms such as Vegas. ||
-|| 47. || !CurTimeoutCount || ||
-|| 48. || !AbruptTimeouts || ||
+|| 47. || !CurTimeoutCount || (*{{{*}}}*) The current number of times the  
retransmit timeout has expired without receiving an acknowledgment for new  
data. tcpEStatsStackCurTimeoutCount is reset to zero when new data is  
acknowledged and incremented for each invocation of section 5.5 in  
[http://www.ietf.org/rfc/rfc2988.txt RFC2988]. ||
+|| 48. || !AbruptTimeouts || (*{{{*}}}*) The number of timeouts that  
occurred without any immediately preceding duplicate acknowledgments or  
other indications of congestion. Abrupt Timeouts indicate that the path  
lost an entire window of data or acknowledgments. Timeouts that are  
preceded by duplicate acknowledgments or other congestion signals (e.g.,  
ECN) are not counted as abrupt, and might have been avoided by a more  
sophisticated Fast Retransmit algorithm. ||
 || 49. || !SendStall || (*{{{*}}}*) The number of interface stalls or  
other sender local resource limitations that are treated as congestion  
signals. ||
 || 50. || !SlowStart || (*{{{*}}}*) The number of times the congestion  
window has been increased by the Slow Start algorithm. ||
 || 51. || !SubsequentTimeouts || (*{{{*}}}*) The number of times the  
retransmit timeout has expired after the RTO has been doubled. See section  
5.5 in [http://www.ietf.org/rfc/rfc2988.txt RFC2988]. ||
-|| 52. || !ThruBytesAcked || ||
+|| 52. || !ThruBytesAcked || (*{{{*}}}*) The number of octets for which  
cumulative acknowledgments have been received, on systems that can receive  
more than 10 million bits per second.  Note that this will be the sum of  
changes in tcpEStatsAppSndUna. ||
 || 53. || peaks.min || ||
 || 54. || peaks.max || ||
 || 55. || peaks.amount || ||