Re: (mmap, munmap) X (msync, NFS) => (NFSv4, fio)

2013-03-28 Thread Andre Felipe Machado
Hello, After the important Bron's explanation, I have been running some preliminary tests using fio in order to raise errors. I had to start on simple small local Debian Linux 6.x Squeeze VMs before trying to stress a XenServer environment hosts, network and storage. Chose NFSv4 because of, presuma

Re: (mmap, munmap) X (msync, NFS)

2013-03-23 Thread Bron Gondwana
On Fri, Mar 22, 2013, at 11:52 PM, Andre Felipe Machado wrote: > Hello, > It seems that cyrus 2.4.16 packaged for Debian Wheezy does not use msync for > mmap'ed files, but only munmap. > > This is a potential source of trouble with NFS. > > Also, browsing git repo, appears that git 2.4 branch is

(mmap, munmap) X (msync, NFS)

2013-03-22 Thread Andre Felipe Machado
Hello, It seems that cyrus 2.4.16 packaged for Debian Wheezy does not use msync for mmap'ed files, but only munmap. This is a potential source of trouble with NFS. Also, browsing git repo, appears that git 2.4 branch is using msync now. Is it correct? http://en.wikipedia.org/wiki/Mmap http://nf