Hi there, did you ever figure out the cause of your delay? I also see this on my SMB and NFS shares. But like you said after initial connection any additional are without such delay.

I am also interested to know if you ever received a solution to this problem. Thanks!

Thanks for the reply!

We actually just discovered that we had a communication issue between the Isilon and our AD DNS servers. There was a firewall we didn't know about blocking access to the AD servers from some new IP numbers we'd assigned on the Isilon. Once they were whitelisted, boom, everything is great now.

@BingS4 @Jrapine @jwinsor We experienced something similar that you described, but it was mostly evident when we tried to set permissions on a newly created folder/file although I believe we saw some latency accessing the share itself at first as well.  The first attempt was painfully (and noticeably) slow and subsequent attempts much faster.

Our issue ended up being PAN firewall related, even though the network team swore up and down they opened the ports.  The PAN firewall was seeing something it didn't like in that SMB traffic and blocking it, so I guess SMB was falling back to another port or whatever that was allowed through the PAN.  Once I parsed through the Splunk logs I was able to show them the denies specific to the delays and got their attention.

Don't know if this helps your specific issue, but first rule of IT: blame the network team.