On 06/13/2012 04:03 PM, Boris Epstein wrote:
On Wed, Jun 13, 2012 at 8:03 AM, Florian Gleixner
wrote: Hi,
my NFS client machines (opensuse 12.1) freeze if i try to copy large files to the NFS Server (opensuse 11.4). It seems that the /proc filesystem blocks somewhere and user processes freeze therefore. The files are ~10GB and bigger than RAM+swap (=8GB). It also works if i generate a 10GB file with dd on the nfs mounted filesystem. Can someone confirm? Or has a solution?
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It is hard to say why things like this happen. Here's one experience I've had.
If the network is weak and can't handle a massive influx of packets sometimes sending few large packets is a better idea. Mount your NFS partition using large rsize/wsize settings (say, 1MB) and see if that helps.
Boris.
Network is GBit switched - no signs of errors at the interface counters. It also happens if i write the file from my laptop with wlan connection. rsize and wsize are default: 262144 bytes. Before i had it at 32k, and then i realized that the default is already higher. The freezes are still there - so i think setting these to 1M will not really help. It also happens with nfs3 and nfs4. Thanks anyway