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Date: Thu, 16 Jun 2011 20:05:21 GMT
From: Christian <christian@teleservice.net>
To: freebsd-gnats-submit@FreeBSD.org
Subject: NFS slow read
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>Number:         157929
>Category:       kern
>Synopsis:       [nfs] NFS slow read
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-fs
>State:          feedback
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jun 16 20:10:09 UTC 2011
>Closed-Date:    
>Last-Modified:  Mon Jul 04 21:44:29 UTC 2011
>Originator:     Christian
>Release:        FreeBSD 8.2-RELEASE
>Organization:
Teleservice Bredband Skane AB
>Environment:
FreeBSD xxxxxxx.xxx.xxx 8.2-RELEASE FreeBSD 8.2-RELEASE #0: Thu Feb 17 02:41:51 UTC 2011     root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64
>Description:
Having problem with read over NFS, speed does not exceed 300Mbit in our environment. With SAMBA, SCP and other methods we get 900Mbit-1000Mbit in read throughput but when using NFS there seems to be a problem to exceed 300Mbit.
We are using ZFS in our environment but have tried to export a non-ZFS volume with no improvements at all.


Write speed is good, so if we reverse mount export in the reversed way on server a instead of server b we can write over NFS (in the same direction as we would read in our earlier tests) with a throughput at 900-1000Mbit.
>How-To-Repeat:
Running FreeBSD 8.2-RELEASE
# /etc/export:
/vol1   -maproot=root   192.168.x.x

# mount 192.168.x.x:/vol1 /mnt/vol1
>Fix:


>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->freebsd-fs 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Fri Jun 17 22:01:52 UTC 2011 
Responsible-Changed-Why:  
Over to maintainer(s). 

http://www.freebsd.org/cgi/query-pr.cgi?pr=157929 
State-Changed-From-To: open->feedback 
State-Changed-By: rmacklem 
State-Changed-When: Mon Jul 4 21:43:18 UTC 2011 
State-Changed-Why:  

I have emailed the individual and am waiting for more 
information w.r.t. the slow NFS read rate he is experiencing. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=157929 
>Unformatted:
