c705b679fb
Introduces two new options: 1. nfs3.*.trusted-write: Forces UNSTABLE writes to return STABLE to NFS clients to prevent the clients from sending a COMMIT. STABLE writes are still handled in a sync manner and so are COMMITs if they're sent at all. 2. nfs3.*.trusted-sync: Forces all WRITEs and COMMITs to return STABLE return flags to NFS clients to avoid the overhead of STABLE writes, and COMMITs that follow UNSTABLE writes. This includes the trusted-write functionality. In addition to the trusted-write, it also writes STABLE writes in an UNSTABLE manner. Both violate the NFS protocol but allow better write perf in most configurations. Use with caution. Signed-off-by: Shehjar Tikoo <shehjart@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 924 (Slow NFS synchronous writes) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=924
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