LVS
lvs-users
Google
 
Web LinuxVirtualServer.org

Re: apachebench not increasing troughput

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: apachebench not increasing troughput
From: Jan Klopper <janklopper@xxxxxxxxx>
Date: Tue, 01 Mar 2005 14:36:17 +0100
Think i got it, don't know why, but now all of a sudden it does work as excpected.

Failover and alive-checks are a bit slow tough.

anyway.,

Thanks,
If i have more questions il post them right here.

greets

Jan Klopper wrote:

Mack,

I changed the hub (10mbit) to a switch 100mbit (2.5gb backplane)
and i see some better transfer rates now (1600 on two servers, no keepalive)

However my third server is not being allowed to play,
TCP  cluster:www wrr
 -> localhost:www                Local   1      0          14108
 -> 192.168.12.9:www             Route   0      0          0
 -> 192.168.12.7:www             Route   1      0          14119
 -> 192.168.12.8:www             Route   1      0          5

As you can see, the last server (192.168.12.9) is down.
But the seconds realserver (192.168.12.8) is up and is recognized.
It gets a couple of redirects, but not nearly as much as the rest.
I restarted ldirectd to see if that would help, but it didn't.

Any clue?

thanks.

Mack.Joseph@xxxxxxxxxxxxxxx wrote:

Joseph Mack PhD, High Performance Computing & Scientific Visualisation
LMIT, Supporting the EPA Research Triangle Park, NC 919-541-0007
Federal Contact - John B. Smith 919-541-1087 - smith.john@xxxxxxx

lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx wrote on 03/01/2005 07:28:32
AM:

Mack,

The director is indeed not forwarding ssh (22),


fine


How can i check for persistent connctions on the server side?


Someone else will have to help here. I haven't set it up, but
when the subject of httpd persistance comes up, people talk
about keepalives. I don't know that they are the same thing yet
(anyone know?).

AB lets me choose wheter or not it should use keepalive connections.
(-k   Use HTTP KeepAlive feature)
If i don;t use it i get 570 pages/sec.
If i do use it, i get aprox 1500 pages/sec.


consistent with it being the same thing.

I have a troughput of 400Kbytes per sec, will test packages soon.
(need to let my head/ears rest from the machines buzzing next to me :P

)
The requested pages are extremely small (13 bytes), but
there might be whole lot of http/tcp overhead involved which is not
counted inside tht 400Kbytes per seccond  amount.


yes read

http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.performance.html#8000pps

if your packets are all ACKs and 13byte pages, you can saturate your
link with
very little delivered payload.

Joe

_______________________________________________
LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
or go to http://www.in-addr.de/mailman/listinfo/lvs-users


_______________________________________________
LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
or go to http://www.in-addr.de/mailman/listinfo/lvs-users



<Prev in Thread] Current Thread [Next in Thread>