Latest post Wed, Aug 10 2022 2:54 PM by Jeroen van Eekeres. 8 replies.
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  • Fri, Jul 29 2022 3:31 AM

    • binba
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    Could you please run this quick test?

    If you have a Nexis with 10-gig Windows10 clients:

    Copy a >100GB file with Windows Explorer, to the machine's local SSD.

    What kind of transfer speeds do you see?

     

    We've been investigating a mysterious problem here for months.

    If you do reply, please mention which network switch(es) you use between the client and the Nexis.

     

    Many thanks!

     

  • Fri, Jul 29 2022 1:57 PM In reply to

    • BobRusso
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    Re: Could you please run this quick test?

    I can tell you that the Windows Explorer does a terrible job of copying files. It does very small reads and writes; the exact opposite of what's needed for NEXIS.

    https://www.youtube.com/avidevangelistbob [view my complete system specs]

    -- Bob Russo Post-Production Workflow Manager - NFL Films

    Bob Russo on Expert Connections

  • Fri, Jul 29 2022 4:38 PM In reply to

    Re: Could you please run this quick test?

    I'm curious, What would be a good way to copy loads of files in a NEXIS enviroment? I would use Resolve's clone tool..

    Editing Movie Magic.

    My Equipment & System Specs

    Media Composer Ultimate 2022.7 | Pro Tools Studio 2022.7 | Avid Play | Sibelius Artist 2022.7

  • Fri, Jul 29 2022 9:36 PM In reply to

    • NYnutz
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    Re: Could you please run this quick test?

    Robocopy is always a safe choice on windows. Rsync on *nix.   

     

    for robocopy, something like this:


    robocopy "SOURCE" "DESTINATION" /S /mt:32 /R:1 /W:3 /log+:C:\Users\Public\Documents\robocopylog.txt 

    Additional options for file/folder exclude, adjust threads for performance, KB article for more info:https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/robocopy 


    With those exact options, i see 6-7Gbps sustained on a copy between nexis workspaces on a 10G workstation in a multi-chassis e4 system across routed multi-floor cisco nexus 9k networking. 

    Dave

    Post Production Infrastructure Engineer

    "A very big network"

     

  • Fri, Jul 29 2022 11:31 PM In reply to

    • binba
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    Re: Could you please run this quick test?

    Thanks, NYnutz. 6.5 Gbps is a figure I can work with.

    It's almost tempting to get into lengthy discussions, while we often skimp on gathering hard data to base our decisions/troubleshooting off of. I'll await to hear one more set of results from the community, before I get into the discussion part.

     

  • Mon, Aug 1 2022 8:48 PM In reply to

    • NYnutz
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    Re: Could you please run this quick test?

    wanted to make sure i clarified: my performance figure was workpace to workspace on the same storage group. Workspace to external storage (SAN/NAS/Local Raid), i would expect to be faster if the destination can handle the load of many concurrent write streams.  

    Dave

    Post Production Infrastructure Engineer

    "A very big network"

     

  • Tue, Aug 2 2022 12:19 AM In reply to

    • BobRusso
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    Re: Could you please run this quick test?

    It doesn't change the issue that Windows Explorer is optimized to do small reads and writes, I believe it is 4 KB. A Scale Out storage group block size is 512 KB. For optimal performance the R/W should be aligned to this.

    https://www.youtube.com/avidevangelistbob [view my complete system specs]

    -- Bob Russo Post-Production Workflow Manager - NFL Films

    Bob Russo on Expert Connections

  • Wed, Aug 10 2022 4:13 AM In reply to

    • binba
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    Re: Could you please run this quick test?

    Until you can convince Microsoft to do that alignment (which hasn't happened to date), how does this help anybody?

    (Unless you can confirm this changed and Windows11 supports 512KB block transfers?)

  • Wed, Aug 10 2022 2:54 PM In reply to

    Re: Could you please run this quick test?

    Hi,

    binba:

    What kind of transfer speeds do you see?

    On a HP z8 connected through single 10GB to a Nexis SDA with 3 E4's using cisco Nexus C93180YC switches in vpc stack using windows explorer I see 250-280MB/s.

     

     

    Most of the MC/NC, Interplay, Nexis, ISIS, Unity stuff. [view my complete system specs]

    Avid reseller ACSR at Telmaco

    http://www.telmaco.gr/en/

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