[Spread-users] Spread and occasional large messages

[Ed Holyat]

I was hoping that someone has run into this problem before.
I am running into significant delays for all message groups when sending
a large number of messages 180*100K onto the spread network.  This burst
of large packets will be sent from a single client application.  There
is also delays in memberships when this message is put onto the spread
network.  

What parameters can I add to the conf file to accommodate this burst of
large messages?  This message is occasionally sent and is out of the
norm, most messages are < 1K on average.  
Would increasing the Window help? 
Would it be better to pause 100 millisecs between sending the 100K
packets?
Will changes to accommodate larger messages directly affect latency in
the delivery of smaller messages?



Monitor> Monitor: send status query

============================
Status at sky V 4.00. 0 (state 1, gstate 1) after 5891550 seconds :
Membership  :  5  procs in 3 segments, leader is sky
rounds   : 47962882     tok_hurry : 11708705    memb change:     632
sent pack: 2148551      recv pack : 20018353    retrans    :  633760
u retrans:  575246      s retrans :      21     b retrans  :   58493
My_aru   :    4054      Aru       :    4054     Highest seq:    4054
Sessions :       9      Groups    :    4831     Window     :      60
Deliver M: 14549831     Deliver Pk: 24559079    Pers Window:      15
Delta Mes: 14549831     Delta Pack:    4054     Delta sec  : 5891550
==================================

Monitor>
============================
Status at cp-devserv4 V 4.00. 0 (state 1, gstate 1) after 7703983
seconds :
Membership  :  5  procs in 3 segments, leader is sky
rounds   : 52378036     tok_hurry : 12968851    memb change:     695
sent pack:  117594      recv pack : 23809965    retrans    :    1737
u retrans:     176      s retrans :    1190     b retrans  :     371
My_aru   :    4054      Aru       :    4054     Highest seq:    4054
Sessions :       8      Groups    :    4831     Window     :      60
Deliver M: 15543677     Deliver Pk: 26684442    Pers Window:      15
Delta Mes:  993846      Delta Pack:       0     Delta sec  : 1812433
==================================

Monitor>
============================
Status at cp-devserv3 V 4.00. 0 (state 1, gstate 1) after 3960720
seconds :
Membership  :  5  procs in 3 segments, leader is sky
rounds   : 38043284     tok_hurry : 8938916     memb change:     546
sent pack: 10962055     recv pack : 6576530     retrans    :  221495
u retrans:  164219      s retrans :       0     b retrans  :   57276
My_aru   :    4054      Aru       :    4054     Highest seq:    4054
Sessions :     143      Groups    :    4831     Window     :      60
Deliver M: 11768289     Deliver Pk: 19186966    Pers Window:      15
Delta Mes: -3775388     Delta Pack:       0     Delta sec  : -3743263
==================================

Monitor>
============================
Status at adisrv V 4.00. 0 (state 1, gstate 1) after 506411 seconds :
Membership  :  5  procs in 3 segments, leader is sky
rounds   : 5520958      tok_hurry : 1252416     memb change:     180
sent pack:  668241      recv pack : 2732585     retrans    :      49
u retrans:      49      s retrans :       0     b retrans  :       0
My_aru   :    4054      Aru       :    4054     Highest seq:    4054
Sessions :       1      Groups    :    4831     Window     :      60
Deliver M: 1797205      Deliver Pk: 3587259     Pers Window:      15
Delta Mes: -9971084     Delta Pack:       0     Delta sec  : -3454309
==================================

Monitor>
============================
Status at biged V 4.00. 0 (state 1, gstate 1) after 7507526 seconds :
Membership  :  5  procs in 3 segments, leader is sky
rounds   : 51232685     tok_hurry : 12701175    memb change:     663
sent pack: 2311188      recv pack : 21107128    retrans    :  239593
u retrans:   26105      s retrans :  199224     b retrans  :   14264
My_aru   :    4054      Aru       :    4054     Highest seq:    4054
Sessions :      43      Groups    :    4831     Window     :      60
Deliver M: 15218043     Deliver Pk: 25955091    Pers Window:      15
Delta Mes: 13420838     Delta Pack:       0     Delta sec  : 7001115
==================================

Ed Holyat
Open Link Financial, Inc.
(516) 227-6600 x 231
www.olf.com

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