I thought the 880's were supposed to get around 60MB writes. Seems that
12-15 would be
worse than an F760.
Is there any published numbers for read or write performance for the
various models? I think
the licensing forbids Netapp users from discussing performance numbers for
some reason, am I
mistaken on this?
art
-----Original Message-----
From: Deepak Soneji [mailto:sonejideepak@hotmail.com]
Sent: Thursday, September 19, 2002 11:05 PM
To: Brian Long
Cc: toasters(a)mathworks.com
Subject: Re: Sun Solaris 8 optimal performance with F880
Brian/Tim
Great ! READS are greatly improved upto 12-15 mbps after changing xfersize
to 8k.
Any idea about what magic numbers for read/write I should try to achieve
while tuning ?
Another question, why TCP ?
Thanks
-Deepak
----- Original Message -----
From: "Brian Long" <brilong(a)cisco.com>
To: "Deepak Soneji" <sonejideepak(a)hotmail.com>
Cc: <toasters(a)mathworks.com>
Sent: Thursday, September 19, 2002 6:47 PM
Subject: Re: Sun Solaris 8 optimal performance with F880
> UDP and 32K transfers don't mix. Reduce to 8K transfers (nfs.udp.xfersize
> 8192) or change to TCP, the preferred method in which to use NFS.
>
> /Brian/
>
> > Toasters
> >
> > Configuration : Sun E6000 server running Solaris 8 latest patch level
> > Filer : F880
> > Cisco Switch 6509(Flowcontrol turned on)
> >
> >
> > We have recently bought 2- F880 filers and we are in the implementation
phases. The weird
> > performance results we are getting with following system settings and
mount parameters.
> > The output from "sysstat 1" on filer, shows writes 35 MBPS but reads
just very slow
> > or not even generate any traffic. Here are the settings
> >
> > ndd -set /dev/udp udp_recv_hiwat 65535
> > ndd -set /dev/udp udp_xmit_hiwat 65535
> > ndd -set /dev/tcp tcp_recv_hiwat 65535
> > ndd -set /dev/tcp tcp_xmit_hiwat 65535
> > ndd -set /dev/ge instance 1
> > ndd -set /dev/ge adv_pauseTX 1
> > ndd -set /dev/ge adv_pauseRX 1
> > ndd -set /dev/ge adv_1000autoneg_cap 0
> > ndd -set /dev/ge adv_1000fdx_cap 1
> >
> > set sq_max_size = 30
> > set nstrpush = 90
> > set ncsize 8000
> > set nfs:nfs3_max_threads = 24
> > set nfs:nfs3_nra =10
> > set nfs:nfs_max_threads = 24
> > set nfs:nfs_nra = 10
> >
> > Mount file system :
> >
> > mount -o rw,bg,hard,intr,proto=udp,vers=3,rsize=32768,wsize=32768
filer01:/vol/test /test
> >
> > Test method
> >
> > dd if=/dev/zero of=/test/foo bs=32k count=50000
> >
> >
> > I have tried to search some documents on now site for the optimal
performance but I could not
> > find any optimal numbers which I should try to achieve.
> > Why reads are chocking up ?
> > anyone has any proven configuration which works optimally ?
> >
> > Thanks in advance for your inputs and thoughts.
> >
> > Regards
> >
> > -Deepak Soneji
> > Flextronics International
> >
> >
>
> --
> Brian Long | | |
> Americas IT Hosting Sys Admin | .|||. .|||.
> Phone: (919) 392-7363 | ..:|||||||:...:|||||||:..
> Pager: (888) 651-2015 | C i s c o S y s t e m s
>