cifs tuning | NetApp | Page 1

surreal compass Feb 5, 2024, 8:06 PM

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Need to tune flexvol/flexgroup for performance with pacs cache on a220 for siemens syngo dynamics... only able to get 300MB/s and it is connected with 40gbps.... HELP!

hushed dome Feb 6, 2024, 6:13 AM

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how much storage is behind it? CIFS access is single thread per volume, so by going to flexgroup, you get multithread

brittle jetty Feb 6, 2024, 9:49 AM

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utilizing ODX or host based copy ?

surreal compass Feb 6, 2024, 4:11 PM

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we have ODX turned on SMB 3.11 - Flexgroup with 16 constituent volumes

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also removed the smb throttling

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Here is the current smbclient configuration:

Speed copying to storage (NetApp before disabling bandwidth):

Speed from storage to Windows server

I set the smbclient configuration false

Speed to storage after smb change

speed from storage to windows server

They seem to be the same

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📎 cleveland_clinic.pdf

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it is like 300TB all flash on 7.6TB Flash drives.... The VMDK performance of the same array attached via NFS is much better... something isn't right... we even moved it to a private network... Does continous availability help with performance at all?

slim zenith Feb 6, 2024, 5:15 PM

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nfs will most likely always be faster than cifs simply because of the underlying transport methods

surreal compass Feb 6, 2024, 6:10 PM

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cifs should not be capping out at 300MBPs over two 40gbps shared links when I can get TrueNAS to >900MBPs same hardware

surreal compass Feb 8, 2024, 12:29 PM

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any thoughts?

karmic canopy Feb 9, 2024, 4:56 PM

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Assuming all hardware is operating without error (including Netapp, host and switch ports), did you consider enabling jumbo frames? , if it is not already ? I know this is not an easy task. at the very least, a frame can fit in two pages of memory

crystal pasture Feb 9, 2024, 6:05 PM

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Are you doing a single file single volume transfer?

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That's kind of a wierd platform because it has 12 cores, but only 6 used for WAFL. I'm not sure how many vol affinities it has.

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Do you have a perf case open?

loud summit Feb 10, 2024, 7:13 PM

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I wonder what the network layout is , lacp, etc. smb is so chatty. Also depends on the data structure that is being moved. Is AQOS applied or something?

brittle jetty Feb 10, 2024, 11:19 PM

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i have seen cases when disabling ODX is beneficial on raw speed on the array but not necessarily ok from network congestion perspective

graceful token Feb 10, 2024, 11:29 PM

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network congestion? at 40Gbps there is certainly more than enough headroom on the network side. No 2-node AFF system can saturate that 🙂
My suggestion would also be to open a perf case but don't expect miracles 🤷‍♂️ I doubt you'll be hitting 900mbps on that A220

#cifs tuning