What are the criteria for grating a file delegation in NFSv4? Are file delegations retained even if a process closes a file and the next process in the chain opens it again (e.g. in a shell script)? Ced PS: Who again grants NFSv4 delegations? Server or client? Do delegations work when data are appended at the end of a file? ---------- Forwarded message ---------- From: Cedric Blancher <cedric.blancher@xxxxxxxxx> Date: 23 April 2014 20:01 Subject: Tuning Linux NFSv4 for high latency connections? To: Linux NFS Mailing List <linux-nfs@xxxxxxxxxxxxxxx> Are there any options to improve the Linux NFSv4 performance over a high latency connection? We currently use Solaris/Illumos as NFSv4 server and client over a cross continental Internet connection. Latency is terrible (~220ms) but the counter this by running work in parallel so the latency is mostly mitigated. We now wish to migrate (short: Away from Oracle because support is basically unbearable) to Linux (tested SuSE 13.1 and current Fedora) and build times are 17 times (!!!) SLOWER than on Solaris/Illumos. Are there any tunables besides actimeo=300? Ced -- Cedric Blancher <cedric.blancher@xxxxxxxxx> Institute Pasteur -- Cedric Blancher <cedric.blancher@xxxxxxxxx> Institute Pasteur -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
