Hello, I noticed yesterday that my Linux (Ubuntu 21.10 x86_64, kernel 5.13.0) NFS4 mount was causing load on the (also Ubuntu, 20.04 LTS) server and when I went to investigate, it seemed like the client was polling the server at about 200 operations per second (100 ops read and the other 100 `nfsiostat` didn’t specify). When I looked at `nfsstat` on the server, I saw a profusion of `putfh` (32%), `sequence` (30%), `layoutget` (15%), and `layoutreturn` (15%) (`getattr` and `lookup` took another 3% between them, and the rest fell below the 1% threshold, even though the total number of operations recorded was on the order of 100 million for a day or so of uptime with two clients connected). The chatty client was had a couple files open in Emacs but I closed them and determined that they weren’t being accessed with `lost`, but the polling continued. The strangely round number of the polling rate is suspicious. Is this normal behaviour? It looks like the NFS version on the client is 1.3.4-6ubuntu1 and server is 1.3.4-2.5ubuntu3.4. Regards, -- Dorian Taylor Make things. Make sense. https://doriantaylor.com
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