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!

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.

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..

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. 

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.

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.  

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.

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?)

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.

WHat are people using on Macs to copy files?

bigworld:

WHat are people using on Macs to copy files?

 

Depends on the situation. Our clients have used Hedge, Silverstack, Rsync, Finder, etc.

A quick test... Nexis 4 x E2 in high-perf mode to internal SSD of a Z8, I am getting ~400 MB/s. In the past, I have achieved 500-700+ MB/s.

This is a good thread on the topic.