11 
Copyright © 2014  NTT Corp. All Rights Reserved. 
Supports OpenFlow 
Can be used as a normal switch as well 
• Has many features (VLAN tagging, VXLAN, GRE, bonding, etc.) 
Flow based forwarding 
Control plane in user space 
• flow miss-hit causes upcall to userspace daemon 
Open vSwitch 
kernel 
eth0 
user space 
openvswitch 
(datapath) 
data plane 
eth1 
handler hook 
promiscuous 
mode 
OpenFlow 
controller 
daemon 
(ovs-vswitchd) 
control plane 
upcall 
Flow table 
(cache) 
Flow table 
FDB 
Can a pdf be compressed - Compress reduce PDF size in C#.net, ASP.NET, MVC, Ajax, WinForms, WPF
C# Code & .NET API to Compress & Decompress PDF Document
change font size on pdf text box; change font size in pdf fillable form
Can a pdf be compressed - VB.NET PDF File Compress Library: Compress reduce PDF size in vb.net, ASP.NET, MVC, Ajax, WinForms, WPF
VB.NET PDF Document Compression and Decompression Control SDK
change pdf page size; change font size in fillable pdf form
12 
Copyright © 2014  NTT Corp. All Rights Reserved. 
Software switches 
•bridge 
•macvlan 
•Open vSwitch 
Hardware switch 
•NIC embedded switch (in SR-IOV device) 
Switching technologies for KVM 
VB.NET TIFF: How to Convert TIFF to PDF in a VB.NET Doc Imaging
A TIFF file can be compressed with several methods, but this If you want to restore the file with a smallest possible size, you should choose TIFF over PDF.
pdf change page size; pdf edit text size
VB.NET PDF Convert to Tiff SDK: Convert PDF to tiff images in vb.
When converting PDF document to TIFF image using VB.NET program, do you TIFF stands for Tagged Image File Format which can be compressed and uncompressed by
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13 
Copyright © 2014  NTT Corp. All Rights Reserved. 
Used with tap device 
Tap device 
•packet transmission -> file read 
•file write -> packet reception 
bridge with KVM 
kernel 
eth0 
bridge 
tap0 
qemu/vhost 
vfs 
Guest 
eth0 
fd 
read/write 
C# Word: How to Compress, Decompress Word in C#.NET Projects
can save both the original and compressed files to project in your VS program, you can simply copy powerful & profession imaging controls, PDF document, image
change paper size pdf; 300 dpi pdf file size
VB.NET Image: RasterEdge JBIG2 Codec Image Control for VB.NET
compressed bitonal images into PDF files and decompress images from PDF files quickly with the smallest quality loss. The encoded images in PDF file can also
advanced pdf compressor online; pdf optimized format
14 
Copyright © 2014  NTT Corp. All Rights Reserved. 
macvtap 
•tap-like macvlan variant 
•packet reception 
-> file read 
•file write 
-> packet transmission 
macvtap (private, vepa, bridge) with KVM 
kernel 
eth0 
macvtap0 
macvtap1 
macvlan 
qemu/vhost 
Guest 
eth0 
fd 
read/write 
qemu/vhost 
Guest 
eth0 
fd 
read/write 
VB.NET Image: JPEG 2000 Codec for Image Encoding and Decoding in
For example, you can use our VB.NET image to display, view and process images compressed or decompressed Integrate PDF, Tiff, Word compression add-on with JPEG
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C# Image: How to Encode & Decode JPEG 2000 Images Using C#.NET JP2
image file format for JPEG 2000 compressed data) adopts image codec SDK has provided can also help powerful & profession imaging controls, PDF document, image
change paper size in pdf document; change font size pdf document
15 
Copyright © 2014  NTT Corp. All Rights Reserved. 
macvtap passthru mode 
•PCI-passthrough like mode 
•Guest can exclusively use physical 
device 
•Guest can use any mac address / 
vlan interface 
•Guest can use promiscuous mode 
•Other modes uses unicast filtering 
•Don't allow to receive mac address 
except for macvtap device's 
•Don't allow vlan tagged packets if 
NIC has vlan filtering feature 
macvtap (passthru) with KVM 
kernel 
eth0 
macvtap0 
macvlan 
qemu/vhost 
Guest 
eth0 
fd 
read/write 
promiscuous 
VB.NET Image: Free VB.NET Guide to Convert Image to Byte Array
Byte array can be compressed and preserved in other data If necessary, you can also use this VB.NET Image Conversion Control to convert Word or PDF document to
pdf page size may not be reduced; batch reduce pdf file size
JPEG to PDF Converter | Convert JPEG to PDF, Convert PDF to JPEG
JPEG to PDF Converter can be used on Windows 95 Support a batch conversion of JPG to PDF with amazingly high speed; Get a compressed PDF file after
reader shrink pdf; best pdf compressor
16 
Copyright © 2014  NTT Corp. All Rights Reserved. 
Configuration is the same as 
bridge 
•used with tap device 
Open vSwitch with KVM 
kernel 
eth0 
openvswitch 
tap0 
qemu/vhost 
vfs 
Guest 
eth0 
fd 
read/write 
VB.NET PowerPoint: How to Convert PowerPoint Document to TIFF in
can be compressed to reduce the file size by using LZW compression and can be converted to many other image and document formats, such as JPEG, GIF and PDF, by
pdf change font size in textbox; change font size pdf text box
C# TIFF: How to Insert & Burn Picture/Image into TIFF Document
That is to say, you add a compressed image to Our .NET TIFF Processing Toolkit can be incorporated powerful & profession imaging controls, PDF document, tiff
best pdf compressor online; best way to compress pdf files
17 
Copyright © 2014  NTT Corp. All Rights Reserved. 
SR-IOV 
•Addition to PCI normal physical function (PF),  
allow to add light weight virtual functions (VF) 
•VF appears as a network interface (eth0_0, eth0_1...) 
•Some SR-IOV devices have switches in them 
•allow PF-VF / VF-VF communication 
NIC embedded switch (SR-IOV)  
kernel 
SR-IOV supported NIC 
eth0 
eth0_0 
eth0_1 
PF 
VF 
VF 
embedded switch 
18 
Copyright © 2014  NTT Corp. All Rights Reserved. 
SR-IOV with KVM 
•Use PCI-passthrough to attach VF to guest 
NIC embedded switch (SR-IOV)  
kernel 
SR-IOV supported NIC 
eth0 
embedded switch 
qemu 
Guest 
qemu 
Guest 
eth0_1 
eth0_0 
19 
Copyright © 2014  NTT Corp. All Rights Reserved. 
SR-IOV with KVM 
•Or use macvtap (passthru) 
•migration-friendly 
NIC embedded switch (SR-IOV)  
kernel 
SR-IOV supported NIC 
eth0 
embedded switch 
eth0_1 
eth0_0 
macvtap1 
qemu/vhost 
Guest 
eth0 
fd 
macvtap0 
qemu/vhost 
Guest 
eth0 
fd 
20 
Copyright © 2014  NTT Corp. All Rights Reserved. 
Environment 
Test results 
•Throughput 
•Overhead on host 
Performance of switches 
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