Best practices for performance on io and storage.

I'm building / buying a new server was planning on going virtual.
Dual xeon 2620 v3 with 64 GB ram we have about 15 users and 14 remote users.
Main server 2008 / 2012 SQL
2nd Server 2008 / 2012 File storage
3rd Server / Terminal Services / Citrix (may not be needed still evaluating)
Here is my concern.
HyperV server installed on a mirror dive 120 GB SAS Raid 0 (i've been informed that this is unnecessary as hyper V doesn't require much space and that having it on an SSD would only improve on the boot up speed for the actual hyper V server, hypervisor,
there fore even if I put this on a slow 5400 RPM drive this would only affect the initial boot up of hyperV (which I don't' plan on rebooting often) is this true, would the page file be an issue?
I was then planning on having 600 sas 15K (x4) raid 10, I would use this for the datastores of the 3 server on these drives.
I've been informed that the I/O on these drives will affect performance and that each server should be on it's own separate physical drives (raid volume).
Is this common? Should I be using separate HD's for each virtual machine?
nambi

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We will be using Redhat Linux AS 4 update u on 64-bit AMD Opterons. The complete database will be on ASM...not the binarys though. All of our datafiles we have currently in our production system are all 25GB files. We will be using RMAN-->Veritas Tape backup and RMAN-->disk backup. I just didn't know if anybody out there was using smallfile tablespaces using 50GB datafiles or not. I can see that one of our tablespaces will prob be close to 4TB.

Best practices for dealing with Exceptions on storage members

We recently encountered an issue where one of our DistributedCaches was terminating itself and restarting due to an RuntimeException being thrown from our code (see below). As usual, the issue was in our own code and we have updated it to not throw a RuntimeException under any circumstances.
I would like to know if there are any best practices for Exception handling, other than catching Exceptions and logging them. Should we always trap Exceptions and ensure that they do not bubble back up to code that is running from the Coherence jar? Is there a way to configure Coherence so that our DistributedCaches do not terminate even when custom Filters and such throw RuntimeExceptions?
thanks, Aidan
Exception below:
2010-02-09 12:40:39.222/88477.977 Oracle Coherence GE 3.4.2/411 <Error> (thread=DistributedCache:StyleCache, member=48): An exception (java.lang.RuntimeException) occurred reading Message AggregateFilterRequest Type=31 for Service=DistributedCache{Name=StyleCache, State=(SERVICE_STARTED), LocalStorage=enabled, PartitionCount=1021, BackupCount=1, AssignedPartitions=201, BackupPartitions=204}
2010-02-09 12:40:39.222/88477.977 Oracle Coherence GE 3.4.2/411 <Error> (thread=DistributedCache:StyleCache, member=48): Terminating DistributedCache due to unhandled exception: java.lang.RuntimeException

Bob - Here is the full stacktrace:
2010-02-09 13:04:22.653/90182.274 Oracle Coherence GE 3.4.2/411 <Error> (thread=DistributedCache:StyleCache, member=47): An exception (java.lang.RuntimeException) occurred reading Message AggregateFilterRequest Type=31 for Service=DistributedCache{Name=StyleCache, State=(SERVICE_STARTED), LocalStorage=enabled, PartitionCount=1021, BackupCount=1, AssignedPartitions=205, BackupPartitions=204}
2010-02-09 13:04:22.653/90182.274 Oracle Coherence GE 3.4.2/411 <Error> (thread=DistributedCache:StyleCache, member=47): Terminating DistributedCache due to unhandled exception: java.lang.RuntimeException
2010-02-09 13:04:22.653/90182.274 Oracle Coherence GE 3.4.2/411 <Error> (thread=DistributedCache:StyleCache, member=47):
java.lang.RuntimeException: java.lang.ClassNotFoundException: com.edmunds.vehicle.Style$PublicationState
     at com.edmunds.common.coherence.EdmundsEqualsFilter.readExternal(EdmundsEqualsFilter.java:84)
     at com.tangosol.io.pof.PortableObjectSerializer.initialize(PortableObjectSerializer.java:153)
     at com.tangosol.io.pof.PortableObjectSerializer.deserialize(PortableObjectSerializer.java:128)
     at com.tangosol.io.pof.PofBufferReader.readAsObject(PofBufferReader.java:3284)
     at com.tangosol.io.pof.PofBufferReader.readAsObjectArray(PofBufferReader.java:3328)
     at com.tangosol.io.pof.PofBufferReader.readObjectArray(PofBufferReader.java:2168)
     at com.tangosol.util.filter.ArrayFilter.readExternal(ArrayFilter.java:243)
     at com.tangosol.io.pof.PortableObjectSerializer.initialize(PortableObjectSerializer.java:153)
     at com.tangosol.io.pof.PortableObjectSerializer.deserialize(PortableObjectSerializer.java:128)
     at com.tangosol.io.pof.PofBufferReader.readAsObject(PofBufferReader.java:3284)
     at com.tangosol.io.pof.PofBufferReader.readAsObjectArray(PofBufferReader.java:3328)
     at com.tangosol.io.pof.PofBufferReader.readObjectArray(PofBufferReader.java:2168)
     at com.tangosol.util.filter.ArrayFilter.readExternal(ArrayFilter.java:243)
     at com.tangosol.io.pof.PortableObjectSerializer.initialize(PortableObjectSerializer.java:153)
     at com.tangosol.io.pof.PortableObjectSerializer.deserialize(PortableObjectSerializer.java:128)
     at com.tangosol.io.pof.PofBufferReader.readAsObject(PofBufferReader.java:3284)
     at com.tangosol.io.pof.PofBufferReader.readObject(PofBufferReader.java:2599)
     at com.tangosol.io.pof.ConfigurablePofContext.deserialize(ConfigurablePofContext.java:348)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.Service.readObject(Service.CDB:4)
     at com.tangosol.coherence.component.net.Message.readObject(Message.CDB:1)
     at com.tangosol.coherence.component.net.message.requestMessage.distributedCacheRequest.partialRequest.FilterRequest.read(FilterRequest.CDB:8)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache$AggregateFilterRequest.read(DistributedCache.CDB:4)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.onNotify(Grid.CDB:117)
     at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.DistributedCache.onNotify(DistributedCache.CDB:3)
     at com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:37)
     at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: com.edmunds.vehicle.Style$PublicationState
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:169)
     at com.edmunds.common.coherence.EdmundsEqualsFilter.readExternal(EdmundsEqualsFilter.java:82)
     ... 25 more
2010-02-09 13:04:23.122/90182.743 Oracle Coherence GE 3.4.2/411 <Info> (thread=Main Thread, member=47): Restarting Service: StyleCacheOur code was doing something simple like
catch(Exception e){
    throw new RuntimeException(e);
}Would using the ensureRuntimeException call do anything for us here?
Edited by: aidanol on Feb 12, 2010 11:41 AM

What is the best practice for creating master pages and styles with translated text?

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Amihan_Zerrudo wrote:
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Hi,
For best practice - i need to know - what is the recommended or guideline concerning these 2 Databases Parameter.
I found for ARCH_LAG_TARGET, Oracle recommend to setup it to 1800 sec (30min)
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Cheers

Dear unsolaris,
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Hi Daniele
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Please make a note of Wireless Network Name (SSID) as this is the Network Identifier...
For Wireless Security : -
Click on the Sub tab under Wireless > Wireless Security...
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Hi,
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Abraham
I'm using Jdevelper 11.1.1.4.0 - Build JDEVADF_11.1.1.4.0_GENERIC_101227.1736.5923

couple of related threads
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Ok setup....
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Is it easy to do so?
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Steve H

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Best practices for performance on io and storage.

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