Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-ie0-f180.google.com ([209.85.223.180]:35552 "EHLO mail-ie0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750723AbaDWSBv (ORCPT ); Wed, 23 Apr 2014 14:01:51 -0400 Received: by mail-ie0-f180.google.com with SMTP id as1so1286874iec.11 for ; Wed, 23 Apr 2014 11:01:50 -0700 (PDT) MIME-Version: 1.0 Date: Wed, 23 Apr 2014 20:01:50 +0200 Message-ID: Subject: Tuning Linux NFSv4 for high latency connections? From: Cedric Blancher To: Linux NFS Mailing List Content-Type: text/plain; charset=UTF-8 Sender: linux-nfs-owner@vger.kernel.org List-ID: 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 Institute Pasteur