Hi, thanks for your answers. But how do i find out, whether the server is using FILE_SYNC? Is there any other mode like "FILE_ASYNC"? And if the server is using FILE_SYNC, how does it get LAYOUTCOMMIT? Thanks in advance Johannes -------- Original-Nachricht -------- > Datum: Mon, 25 Jun 2012 09:46:40 -0400 > Von: Trond Myklebust <trond.myklebust@xxxxxxxxxx> > An: Johannes Schild <JSchild@xxxxxx> > CC: linux-nfs@xxxxxxxxxxxxxxx > Betreff: Re: LAYOUTCOMMIT/LAYOUTRETURN > On Mon, 2012-06-25 at 09:43 +0200, Johannes Schild wrote: > > Hi Guys, > > > > i have another question on pNFS. I looked at my Wireshark protocols, > while i used the FILE-Layout, and i wondered why i have no > LAYOUTCOMMIT/LAYOUTRETURN statements in my protocols. > > I transfered one file to my storage server (NETAPP Simulator 8.1 C-Mode) > and i only got a LAYOUTGET. > > > > cat /proc/self/mountstats | grep LAYOUT says: > > nfsv4: > bm0=0xfafe8fff,bml=0x60fdfffe,acl=0x3,sessions,pnfs=LAYOUT_NFSV4_1_FILES > > LAYOUTGET: 1 1 0 216 236 0 1 1 > > LAYOUTCOMMIT: 0 0 0 0 0 0 0 0 > > LAYOUTRETURN: 0 0 0 0 0 0 0 0 > > A pNFS client should never send LAYOUTCOMMIT to a server that does > FILE_SYNC writes. > > The Linux pNFS client uses the 'forgetful client' model, so it will > never send LAYOUTRETURN on layout recalls either. The only case where we > send LAYOUTRETURN is when the file falls out of the inode cache. > > > > Is there any other way to verify that pnfs is used on client site? > > The most direct way is to look for a TCP connection to the data server > using 'netstat -t'. > > Cheers > Trond > -- NEU: FreePhone 3-fach-Flat mit kostenlosem Smartphone! Jetzt informieren: http://mobile.1und1.de/?ac=OM.PW.PW003K20328T7073a -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
