[Ocfs-users] OCFS 1.0.9-6 performance with EVA 6000 Storage

[Wim Coekaerts]

1.0.11 won't change amount of io. if you already have io problems you
have to use .12, which should be out any day..  


On Wed, Jun 02, 2004 at 08:35:49AM +0700, Jeram wrote:
> Hi Sunil...
> 
> Thanks for your response, I will try to use 1.0.11, and observe the
> performance...
> 
> Rgds/Jeram
> 
> -----Original Message-----
> From: Sunil Mushran [mailto:Sunil.Mushran at oracle.com]
> Sent: Wednesday, June 02, 2004 8:30 AM
> To: Jeram
> Cc: ocfs-users at oss.oracle.com; ocfs-devel at oss.oracle.com
> Subject: Re: [Ocfs-users] OCFS 1.0.9-6 performance with EVA 6000 Storage
> 
> 
> Heartbeating in ocfs is currently per volume. The nmthread reads 36
> sectors and writes 1 sector every second or so. The io in vmstat you see
> is due to heartbeat.
> 
> As far as the mount is concerned, the mount thread waits for the
> nmthread the stabilize, 10 secs or so.
> 
> We are working on making the heartbeat configurable. 1.0.12 will have
> some stuff regarding that.... hb and timeout values. It will not be
> activated by default. We are still working out the details. That will
> reduce the hb related io.
> 
> If you want to use 51 mounts, make sure your hardware can handle the io.
> For e.g., if you see ocfs msgs like, "Removing nodes" and "Adding nodes"
> without a node performing any mount/umount, you have a problem. In
> anycase, you should use 1.0.11 at the least. In 1.0.10, we doubled the
> timeout from 1.0.9.
> 
> Hope this helps.
> Sunil
> 
> On Tue, 2004-06-01 at 18:04, Jeram wrote:
> > Dear All...
> > 
> > I need some information regarding OCFS performance in my Linux Box,
> herewith
> > is my environment details :
> > 1. We are using RHAS 2.1 with kernel 2.4.9-e.27 Enterprise
> > 2. OCFS version : 2.4.9-e-enterprise-1.0.9-6
> > 3. Oracle RDBMS : 9.2.0.4 RAC with 5 Nodes
> > 4. Storage = EVA 6000 with 8 TB SIZE
> > 5. We have 1 DiskGroup and 51 LUNs configured in EVA6000.
> > My Question is :
> > 1. It takes arround 15 minutes to mount arround 51 ocfs file system, is
> this
> > a normal situation?
> > 2. I monitor the OS using VMSTAT without starting the RAC server, column
> IO
> > (bo and bi) it's giving 3 digits value continuously, then I unmount all
> the
> > OCFS filesystem, again monitor the IO using VMSTAT,  column IO (bo and bi)
> > it's giving 1 digits value, any idea why this is happen?
> > I have raised this issue to HP engineers who provide the HW, have not got
> > the answer yet.
> > Thanks in advance
> > Rgds/Jeram  
> >  
> > 
> > 
> > 
> > _______________________________________________
> > Ocfs-users mailing list
> > Ocfs-users at oss.oracle.com
> > http://oss.oracle.com/mailman/listinfo/ocfs-users
> _______________________________________________
> Ocfs-users mailing list
> Ocfs-users at oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs-users