I'm not sure I get a chance to specify? root@pm02:/# mount -l | grep 231 192.168.0.231:/mnt/foxpool on /mnt/pve/foxpool type nfs (rw,relatime,vers=3,rsize=65536,wsize=65536,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.0.231,mountvers=3,mountport=918,mountproto=udp,local_lock=none,addr=192.168.0.231)
It was set up using the web interface, where I can't see an option for this. NFS client certainly feels asynchronous to me. Suppose I "sar -n DEV 1 | grep eth0" while I observe this 'buffering' effect ... I see next to no activity until the instant that "zpool iostat" does. i.e. the proxmox host is holding onto data and choosing to flush it at a later stage. Thanks again, Chris -----Original Message----- From: Pongrácz István [mailto:[email protected]] Sent: 04 February 2014 14:39 To: Chris Murray; Alexandre DERUMIER Cc: pve-user pve.proxmox.com Subject: Re: [PVE-User] Understanding write caching in proxmox How about your NFS setup? Sync, async? István ----------------eredeti üzenet----------------- Feladó: "Chris Murray" [email protected] Címzett: "Alexandre DERUMIER" [email protected] CC: [email protected] Dátum: Tue, 4 Feb 2014 14:14:51 -0000 ------------------------------------------------- > Sorry, I might have misled you with my question. It might have the > appearance of another general and possibly quite common one. > > My troubleshooting was performed on the proxmox *host*, therefore I > was under the impression that cache=[whatever] wouldn't make a > difference since that's a property of a virtual machine disk. > > For the *VM*, I'm using writethrough .. however I'm observing exactly > what you explained for 'none' or 'writeback'. My VM is Windows Server > 2008 R2, and I'm using sdelete to fill it with data. 'sdelete -z' > won't appear on the 'zpool iostat' for quite some time, while the > cached figure on the proxmox host increases. That's despite the disk being > set to writethrough. > > Apologies if I'm not being clear. > ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4259 / Virus Database: 3684/7058 - Release Date: 02/03/14 _______________________________________________ pve-user mailing list [email protected] http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
