Re: high load, no bottleneck

2013-09-27 Thread Mouse
>>> I tried moving a client NFS mount to async. [...] >> Further testing shows that server with -o log / client with -o async >> has no performance problem. OTOH, the client sometimes complain >> about write errors. -o async seems dangerous. > -o async is very dangerous. there's not even the va

re: high load, no bottleneck

2013-09-27 Thread matthew green
> > I tried moving a client NFS mount to async. The result is that the > > server never sees a filesync again from that client. > > Further testing shows that server with -o log / client with -o async has > no performance problem. OTOH, the client sometimes complain about write > errors. -o asy

Re: high load, no bottleneck

2013-09-27 Thread Emmanuel Dreyfus
Thor Lancelot Simon wrote: > It should be possible to gather those requests and commit many of them > at once to disk with a single cache flush operation, rather than issuing > a cache flush for each one. This is not unlike the problem with nfs3 in > general, that many clients at once may issue

Re: high load, no bottleneck

2013-09-27 Thread Emmanuel Dreyfus
Emmanuel Dreyfus wrote: > I tried moving a client NFS mount to async. The result is that the > server never sees a filesync again from that client. Further testing shows that server with -o log / client with -o async has no performance problem. OTOH, the client sometimes complain about write

Re: please answer this query

2013-09-27 Thread Matthias Scheler
On Thu, Sep 19, 2013 at 08:49:47PM +0530, Prateek Lokur wrote: > 1. Please give me the architecture diagram of netBSD OS(OS > schematic diagram). The internals are documented here: http://www.netbsd.org/docs/internals/en/ > 2. Brief on the performance on the NetBSD OS. I'm sorry but that is a v