For leaf classes is best PFIFO or SFQ?

Linux Advanced Routing and Traffic Control

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Hi to all,
i'm following this guide (http://www.opalsoft.net/qos/DS-28.htm), is very detailed, but i'm a bit confused about queuing disciplinse of leaf classes.

In this guide the author uses PFIFO (see the scheme that i attached at message) in this way:

# tc class add dev eth0 parent 1:21 handle 210: pfifo lmit 10
# tc class add dev eth0 parent 1:22 handle 220: pfifo lmit 10
# tc class add dev eth0 parent 1:23 handle 230: pfifo lmit 10
# tc class add dev eth0 parent 1:24 handle 240: pfifo lmit 10
# tc class add dev eth0 parent 1:31 handle 310: pfifo lmit 10
# tc class add dev eth0 parent 1:32 handle 320: pfifo lmit 10
# tc class add dev eth0 parent 1:33 handle 330: pfifo lmit 10
# tc class add dev eth0 parent 1:34 handle 340: pfifo lmit 10


But is not better use SFQ, like this?


# tc class add dev eth0 parent 1:21 handle 210: sfq preturb 10
# tc class add dev eth0 parent 1:22 handle 220:
sfq preturb 10
# tc class add dev eth0 parent 1:23 handle 230:
sfq preturb 10
.
.
.

What's the real difference?

Best Regards

--
Stefano Mainardi
Presidente Associazione ILDN - Italian Linux Distro Network
Mobile: 349/3917212
Skype: mainardistefano
IM (ICQ): 250-292-408
Blog: http://www.mainardistefano.org

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