VMware View 4 - PCoIP - Scanning is very slow

[mas1]

When scanning from a USB scanner from a fat client without VDI, it takes 7 seconds. When using VMware View 4.0 with PCoIP, it takes 52 seconds.

Any suggestions?

Rgds

M

[ChrisKubiak]

Are you positive that the session they started is PCoIP? We are piloting View in an area that does alot of scanning when we started off we were using RDP (as printer passthrough was not supported with PCoIP yet) and scanning was much slower than the user just using their local PC. When the latest update included PPT we switched them over to PCoIP and scanning performance significantly improved.

They typically scan multiple page batches and with View there is a ~3-5 second hesitation before it starts to scan but once the scan starts its as fast as their physical PC.

[cresch]

Did you ever find any resolution or improvement?

We're seeing similar behavior. With VDI client, I can scan at 200dpi and it will scan pause about 3 secs, then scan 1-2 pages, then pause for another 7-8 secs, and repeat until the scan job is complete.

Does this possibly have to do with a usb 1.1 limitation as opposed to usb 2.0 support somewhere?

(Incidentally, I have yet to make this same Canon DR-2580C work at all from the same VM accessed via a Wyse P20 client)

[mas1]

No. Unfortunately we haven't found any resolution. This case was actually "show stopper" for our VDI project.

M

[Slushy]

Greetings.

PCoIP runs at USB 1.1 speeds, and that is the reason for the speed hit.

[mas1]

Interesting! Are you sure? Do you have any documentation from VMware to confirm this?

M

[mittim12 · Accepted solution]

I sent an email to teradici support and they verified that the speed was closer to USB 1.1 instead of 2.0. If you PM me your email I'll send you the conversation

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[mas1]

Thanks! I believe you! I have also got confirmation about this from other friends.

Rgds

M