[PVE-User] Proxmox NFS issue

Michael Rasmussen mir at miras.org
Wed Nov 6 17:00:32 CET 2013


 

Hi, 

Maybe you could try the new ZFS plugin which will expose native ZFS
through iSCSI? 

This also means cloning and online native zfs snapshots with raw images.


On 11-06-2013 16:05, Muhammad Yousuf Khan wrote: 

> i am facing slow read and write on our new NAS. 
> here is the hardware detail.
> 
> Proxmox : 
> 12GB RAM 
> Xeon 3.2 (2 processors) 
> 500GB HD for Proxmox and Debian OS.
> 
> Remote SAN/NAS: 
> OS : omniOS 
> RAM : 12 GB 
> FS : ZFS 
> Sharing protocol : NFS 
> Xeon 3.2 (2 processors) 
> 1 SSD 60GB ARCH2 
> 1 SSD 120GB ZIL 
> 3 Mix capasity HD 800GB,500GB and 1TB all are 64bit Cache. 
> ZFS RAID Type : RaidZ
> 
> when i am inside the VM and trying to copy "to" network or "from" network i see very slow traffic. specifically talking about inside VM.
> 
> kindly find an attach file. to see my read and write performance. in side graphs Red line is showing my copy data-to-VM and white line showing copy data-to-network.
> 
> when i am copying data from terminal it is showing me good speed. 
> 
> here is the some more detail on Mount points. (output of my "df -h" command)
> 
> 10.x.x.25:/tank/VMbase 903G 2.1G 901G 1% /nfscom 
> 
> --------------------------------------------------------------------------- 
> here is some copy test on terminal from the nfs mount point
> 
> root at bull:/nfscom/images/1009# rsync --progress vm-1009-disk-1.raw /
> vm-1009-disk-1.raw
> 824311808 7% 70.00MB/s 0:02:18
> 
> (you can see i am coping 10GB file from NFS mount to "/" this is the same VM image which is showing problem in the attached graphics)
> 
> now copying same VM from "/" to same NFS mount point.
> 
> root at bull:/nfscom/images# rsync --progress /vm-1009-disk-1.raw /nfscom/images/
> vm-1009-disk-1.raw
> 607682560 5% 63.71MB/s 0:02:35
> 
> you can see my read and writes are working-great from the console but when it come to VM i am facing issues inside VM. 
> 
> actually i have asked this question few weeks ago. some one suggested me in the forum to buy a SSD for ZIL so it took me a while and i bought even two SSDs 1 for Level 2 Arch and 1 for ZIL. but still i am standing at the same point. 
> 
> Can anyone please tell me what mistake i am doing here.
> 
> even i tried FreeNas with same ZFS config i am facing same issue.
> 
> however when using Same NFS with Virtualbox in ubuntu 12.x it is doing fine. 
> 
> i tried any available HD type and all the modes available in proxmox, such as "no cache" "sync" write through" on both raw and qemu drive types but nothing help. 
> 
> i dont know where i am doing wrong. 
> 
> please help me out. i am very near to bang my head :).
> 
> !DSPAM:527a5d7e152822157475998! 
> 
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> 
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-- 
Hilsen/regards
Michael Rasmussen
 

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