Does raid 0 double file access in a MP?

I am thinking of a MP (Quad 2.66 or 2.94) set up with dual drive striping or, the iMac i7. I know both have the same processor (Xeon has a slight edge) but, will there be a big difference with the striping so I should go the distance and get the MP instead?
Any one with knowledge if the striping will double (probably 2- 2TB drives in the MP (Hitachi), vs. the 1 - 2TB in the iMac) file access of photo processing an advantage with the MP?
Thanks....

All one can say is that in a perfect striped RAID using identical drives the read/write speeds are roughly double for two drives compared to the single drive.
However, the advantage declines as the RAID array becomes filled. The more files on the array the slower it becomes losing most of its edge over a single drive. Also a striped RAID is vulnerable to drive failure. If one drive fails then all the data on the RAID are lost and unrecoverable.
In the vast majority of home systems there's little justification for using RAIDs. Striped RAIDs are used mainly in enterprise installations where large amounts of fast server storage is needed and where mirrored RAIDs are used to provide data redundancy and backup.
RAID Basics
For basic definitions and discussion of what a RAID is and the different types of RAIDs see RAIDs. Additional discussions plus advantages and disadvantages of RAIDs and different RAID arrays see:
RAID Tutorial;
RAID Array and Server: Hardware and Service Comparison>.
Hardware or Software RAID?
RAID Hardware Vs RAID Software - What is your best option?
RAID is a method of combining multiple disk drives into a single entity in order to improve the overall performance and reliability of your system. The different options for combining the disks are referred to as RAID levels. There are several different levels of RAID available depending on the needs of your system. One of the options available to you is whether you should use a Hardware RAID solution or a Software RAID solution.
RAID Hardware is always a disk controller to which you can cable up the disk drives. RAID Software is a set of kernel modules coupled together with management utilities that implement RAID in Software and require no additional hardware.
Pros and cons
Software RAID is more flexible than Hardware RAID. Software RAID is also considerably less expensive. On the other hand, a Software RAID system requires more CPU cycles and power to run well than a comparable Hardware RAID System. Also, because Software RAID operates on a partition by partition basis where a number of individual disk partitions are grouped together as opposed to Hardware RAID systems which generally group together entire disk drives, Software RAID tends be slightly more complicated to run. This is because it has more available configurations and options. An added benefit to the slightly more expensive Hardware RAID solution is that many Hardware RAID systems incorporate features that are specialized for optimizing the performance of your system.
For more detailed information on the differences between Software RAID and Hardware RAID you may want to read: Hardware RAID vs. Software RAID: Which Implementation is Best for my Application?

Similar Messages

FileDialog in SAVE mode does not throw file access error

Hi,
We are using FileDialog to SAVE and LOAD files.
If a file is selected to which the user has no access, then LOAD dialog throws an
error, but SAVE dialog does not.
Have I skipped something ??
Below is a sample code :
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TestClass extends JFrame {
public TestClass() {
setSize(400, 400);
JPanel l_objPanel = new JPanel();
getContentPane().add(l_objPanel);
final JButton l_objButton = new JButton("FileOpen");
l_objPanel.add(l_objButton);
l_objButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent p_objEvent) {
FileDialog l_objDlg = new FileDialog(TestClass.this, "Save now", FileDialog.SAVE);
l_objDlg.show();
public static void main( String[] strArgs ) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch(Exception e) {
e.printStackTrace();
TestClass l_objDlg = new TestClass();
l_objDlg.show();

The bug you pointed out is pretty different: JWS should work offline if no network connection is available, but no such behaviour is provided, never the less granted, if your server is down. No matter what your 'web-distributed' app is (ASP, SaaS, SOA, RIA, cloud, ...), you may have it work without a network, but no architectural pattern would ever remotely consider it should run if the providing server is down (and is not redirecting or, at least, sending some 'manageble' error).

"File does not exist or access denied"

Hi
I am new to FDM. I am trying to import a .csv file in FDM using Import Format Builder. When i select the file in the Inbox folder of my application, it gives me the message "Error: File does not exist or access denied".
Any ideas why this error is coming. I have been struggling with this error for some time now.
Thanks in advance

Hello,
I do not think it has anything to do with the configured ID for the AppPool and would not suggest tinkering around in it, as it can damage the application significantly.
Some concerns that I have are the following:
1. When you get the error, do you get a 'white' fish?
2. What does your UserError Log state? Clear it and reproduce the issue and post the results.
3. What does the Import Log state? (Import button on the View File tab of the Import Fish)
Thank you.

How does iTunes use or access existing files?

how does iTunes use or access existing files? My existing windows music folder is about 2GB in size. When moving to iTunes, will iTunes just access those existing files or will it make an actual copy of all the songs? Thanks!

http://support.apple.com/kb/HT1549?viewlocale=en_US

Not Working: BlackBerry Link Remote File Access Remove Old BlackBerry from BB ID

I have: removed my blackberry q10 from blackberry link, wiped my q10, uninstalled and reinstalled blackberry link, have link version 1.1.1.32, blackberry q10 os version 10.1.0.2309 - which whenever I plug in the q10 after removing the device from link, says there is an os update, so I update it, and then it does nothing apart from rebooting the q10, or gives an error saying 'updates not available. Please check internet connection and retry.'.
Also, I have Logout/login on blackberry link, I know my q10 is activated as I have purchased items from app world, and on the computer the app world site shows that I have a q10 when I sign in. I am using the same BBID and have changed the password on my q10 to see if that made a difference, then signed out and back into link on computer with updated password. I have administrator rights on my computer.
I can access the q10 from my computer over the same wifi network, and it syncs files fine with wireless sync turned on. It is remote file access not giving the option to connect to my q10. 'BBID *email* isn't associated with a device running Blackberry 10 OS or an error occurred when trying to retrieve your information from the Blackberry ID servers.'
The problem is that although I have the same blackberry id for link and my q10, no devices show up on the remote file access screen, and I cannot access my files on my computer from my q10, yet I can sync them on my computer over the wifi network. How can I enable Remote File Access?
A problem could be that I have a Curve 9300 on my BB ID account, so if I could disable this (which I have no idea how to do after a lot of research), this might rectify why link cannot set up remote file access.
What I haven't done is wiped my q10 and uninstalled all user data from link at the same time, as then I would have to manually reload everything on my q10.
My q10 shows my computer in the settings\blackberry link\paired devices , but I 'cannot view files on *computer*'. Also, link does not show in the file manager. I set up my q10 as a permanent link not a one-off connection.

No one cares because it's not a z10 (I know because I am having the same problem and no one knows how to fix it and no threads for q10 fix)
Slàinte.
Not all things are good.
Not all things are evil.
But with an open mind...
You can see the difference.
Knowledge is power.

Read-only file access from network volume

I get an read-only file access from network volume problem while sharing a drive from Snow Leopard to a Tiger install. Most of files were opening well, but *.fp7 (FileMaker) and *.xls (Excel) files won't open dealing with a read-only error.
As descibed in the last post of http://discussions.apple.com/thread.jspa?threadID=1406977 the client have the same share name of the server. Renomming it resolved the error!
Thanks!

right then, as it looks like I'm talking to myself....
I have just wiped clean the Macbook Pro.
I installed Leopard from scratch, then installed Office 2008.
Logged back onto the network share, and the read-only error came up again, ONLY in Excel.
bugger.
Did the same thing with my Macbook and all is fine.
Copy the file to the local hard drive, opens ok.
I then copied the file to another Mac on the network.
mmmm, opens fine.
what's the difference....
mmmm, the machine it opens fine from is running 10.4
the machine which hosts all the data is running 10.3.9
could this be the problem.
Just done a software update check on the 10.3 machine and there are some security updates that need doing.
Going to run that now and see what happens, otherwise I think the iMac running 10.3.9 is going to need to come up to 10.4 and fingers crossed this will solve it.

What does the open file dialog do 'under the hood' and is there a way to simulate it

What does the open file dialog do 'under the hood' and is there a way to simulate it?
I have a bug in my code (that I've posted about before, here) which I can't fix at the moment, but I do have a workaround.
Briefly, the bug:
I call a dll from a function node, to initialise and run a spectrometer. If I start up the PC, LabVIEW and run my vi the code runs without complaint, the first call to the dll to initialise the spectrometer doesn;t return an error but the spectrometer is not detected either.
I've tried various solutions, see the link above, and none work
The workaround:
If, at any time before running the code containing the function node I open an 'open file' dialog window, select the dll and click ok/hit enter then everything is fine. When I run the main code the spectrometer is detected.
I use an express vi to open the file dialog, I specify the start path and file name as constant inputs and just click ok/hit return when the dialog pops up. I don't do anything with the dialog outputs. In fact the vi that contains the open file dialog can be run before the project containing the bug is even open.
I have to do this everytime I turn the PC on.
So, either
1) Can somewone suggest a fix for the original bug?
2) What is the easiest way to simulate the enter keypress when the open file dialog pops up
or
3) Can someone tell me what the open file dialog does under the hood that somehow causes the dll to work and can it be simulated in straight LabVIEW
I suspect that the dll itself is dodgy ( I have in the past talked to the supplier but not got very far, and I will try again but I would like a quick, temporary solution too). I'm guessing that the file dialog is making some kind of check on the file, and possibly registering its presence with the OS (winXP). I tried using the file/folder exists vi to see if checking the file like that worked but no luck.
Any help greatly appreciated.
Dave

Hi David
I am very conscious about thread hijacking but this sounded like my issue so I hope you dont mind me asking about your issue. I am hoping that you have a spectrometer from the same vendor as me and its not just me seeing an Error 1097 issue. My spectrometer is from a company called Stellarnet.
So far I have unable to get it to work with other VIs. There is one condition where I can get it to work but its no good for me.
Case 1
I open the VI in a fresh labview environment with no other VIs in memory. The code runs with no issue.
Case 2
Labview is not opened. I double click the spectrometer VI in windows explorer. The VI opens but it fails to run resulting in Error 1097. Personally, I dont see the difference between this and Case 1 above and yet it fails.
Case 3
If I already have other VI's in memory and try to load the spectrometer VI and run it fails with Error 1097. This case is the one that most important to me. I have a test executive that will load test VIs dynamically and I can't get this to work. Same problem Error 1097.
I wanted to share what I have seen with you and to let you know that maybe somebody else has the same issue. I am convinced its the DLL but the vendor dis-agreed saying it was LabVIEW. I couldn't convince him otherwise.
Thanks in advance
David

MaxDB KNLDIAG file access denied

Hi,
I'm a DBA recently assigned to support MaxDB database (ver 7.6) used by
SAP Content Server in our windows 2003/32 bit environments.
Initially, our windows support group granted the DBA group access to
the files on E:\sapdb\data\wrk\CD1 where the KNLDIAG and other files
are allocated. We were able to view the KNLDIAG file when errors
occurred.
However, when the database instance is placed offine and back online,
we loose access to the KNLDIAG file, but not the other files on the
same directory/subdirectory.
Can you explain what is happening?
Is MaxDB doing something behind the scenes?
What can be done so that we don't loose access to this file?
I would appreciate any help you can provide.
Regards,
Bill

Hi Bill!
> I'm a DBA recently assigned to support MaxDB database (ver 7.6) used by
> SAP Content Server in our windows 2003/32 bit environments.
> Initially, our windows support group granted the DBA group access to
> the files on E:\sapdb\data\wrk\CD1 where the KNLDIAG and other files
> are allocated. We were able to view the KNLDIAG file when errors
> occurred.
> However, when the database instance is placed offine and back online,
> we loose access to the KNLDIAG file, but not the other files on the
> same directory/subdirectory.
>
> Can you explain what is happening?
Yes, no problem!
> Is MaxDB doing something behind the scenes?
Of course not - it's well documented
Unlike Oracle MaxDB does not use the same file all the time to write out the error messages.
Instead, with every restart the last file 'KLNDIAG' (and/or 'KNLMSG' in more recent versions) is renamed to 'KNLDIAG.OLD'. If there is already an 'KNLDIAG.OLD' this file is gone afterwards.
Then a new file is 'KNLDIAG' is created by the MaxDB Kernel with the default permission of the folder.
Usually these are dictated by the Windows account that runs the MaxDB-Service.
If you did not change this, this would be the "local systemaccount".
On my test system this results in default permissions that allow members of "Adminstrators", "Backup Operators", "System" and of course the "Owner/Creator" to access the file.
> What can be done so that we don't loose access to this file?
Simple: if you want to access it via OS tools, make sure that the user is a member of the "Administrators" or the "Backup Operators" group.
If you don't want to do that, just use the file access via the DBMGUI or DB Studio (or DBMCLI) to get access to the file.
regards,
Lars
p.s.
Maybe you didn't notice that by now - the KNLDIAG file is not simply written at the end of the file, but consists of a startup header part and a body which is cyclically overwritten.
For any newbies I cannot overstate the importance of reading the documentation [http://maxdb.sap.com] and/or get a training for it (SAP course ADM 515 really pays of here...)

How to install Adobe Reader on a PC which does not have Internet Access?

Hi
I have a neighbour who does not have Internet access. He wants to be able to open PDF files. He is using 64 bit Windows 7. Is there a link to an EXZE file that I can download?
Thanks
Geoff

Hi Geoff
Have a look at ftp://ftp.adobe.com/pub/adobe/reader/win/
Regards

Problem with file access in other computer in jsp

I have problem with file accessing in other computer in jsp.
The follow code
File folder=new File("Z:"+File.separator+"sharefolder");//Z is a net share driver
File[] files=folder.listFiles();
System.out.println("test");
System.out.println("length="+files.length);
will throw exception at the second print.
but it works well in main funtion.
Is anybody know what is the problem.
JSP works on windows2003 server,tomcat 5.0.28 JDK1.4 net share folder on windows2000 server

no error code for this.But when I start tomcat I get the follow error.
java.lang.IllegalArgumentException: Document base Z:\ does not exist or is not a readable directory
     at org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.java:138)
     at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:3910)
     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4138)
     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)
     at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDeployer.java:903)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:216)
     at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256)
     at org.apache.commons.digester.Rule.end(Rule.java:276)
     at org.apache.commons.digester.Digester.endElement(Digester.java:1058)
     at org.apache.catalina.util.CatalinaDigester.endElement(CatalinaDigester.java:76)
     at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
     at org.apache.commons.digester.Digester.parse(Digester.java:1567)
     at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:488)
     at org.apache.catalina.core.StandardHost.install(StandardHost.java:863)
     at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:483)
     at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:427)
     at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983)
     at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:349)
     at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1091)
     at org.apache.catalina.core.StandardHost.start(StandardHost.java:789)
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)
     at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478)
     at org.apache.catalina.core.StandardService.start(StandardService.java:480)
     at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
     at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
     at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
Jun 5, 2006 6:55:41 PM org.apache.catalina.core.StandardContext start
SEVERE: Error in resourceStart()
Jun 5, 2006 6:55:41 PM org.apache.catalina.core.StandardContext start
SEVERE: Error getConfigured
Jun 5, 2006 6:55:41 PM org.apache.catalina.core.StandardContext start
SEVERE: Context startup failed due to previous errors
Jun 5, 2006 6:55:41 PM org.apache.catalina.core.StandardContext start
SEVERE: Exception during cleanup after start failed
LifecycleException: Container StandardContext[msgstore] has not been started
     at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4466)
     at org.apache.catalina.core.StandardContext.start(StandardContext.java:4371)
     at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
     at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
     at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)
     at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDeployer.java:903)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:216)
     at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256)
     at org.apache.commons.digester.Rule.end(Rule.java:276)
     at org.apache.commons.digester.Digester.endElement(Digester.java:1058)
     at org.apache.catalina.util.CatalinaDigester.endElement(CatalinaDigester.java:76)
     at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
     at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
     at org.apache.commons.digester.Digester.parse(Digester.java:1567)
     at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:488)
     at org.apache.catalina.core.StandardHost.install(StandardHost.java:863)
     at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:483)
     at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:427)
     at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983)
     at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:349)
     at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1091)
     at org.apache.catalina.core.StandardHost.start(StandardHost.java:789)
     at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)
     at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478)
     at org.apache.catalina.core.StandardService.start(StandardService.java:480)
     at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
     at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)

Adobe Reader does not recognize file name (filename10.5.11.pdf) but does in Adobe Standard 9. Why?

I post documents to our Intranet site and found out recently that Adobe Reader does not recognize certain file names in PDF files. For instance, when trying to open a PDF file with the name
filename10.5.11.pdf in Adobe Reader, the web browser will not open the PDF and the display is blank.   When I'm using another computer with Adobe Standard 9, I do not have a problem opening the file.
I would like to know if anyone else has had a similar issue and why Reader will not recognize the file name and Standard does.

The version is Adobe Reader 10.1.0    I will request the latest version
and let you know if that fixes the problem
Actually I had changed the name of the file so our associates could access
the file (changed the . to a hyphen) It still made me wonder why Reader
wouldn't open it at that time.
Thanks again for you assistance and I will let you know if this resolves
the issue.
Regards,
Susan
From:   Ankit_Jain <[email protected]>
To:     SusanPleso <[email protected]>
Date:   10/19/2011 12:56 AM
Subject:        Adobe Reader does not recognize file name
(filename10.5.11.pdf) but does in Adobe Standard 9. Why?
Re: Adobe Reader does not recognize file name (filename10.5.11.pdf) but
does in Adobe Standard 9. Why?
created by Ankit_Jain in Adobe Reader - View the full discussion
Hi Susan,
Thanks for providing the information.
Could you also let me know what is the exact version of Adobe Reader on
your system. You can check the same y clicking on Help > About Adobe
Reader X.
In case its not 10.1.1, please try updating to the latest version and see
if the problem persists.
Also, does any other PDF with a different filename open in Internet
Explorer correctly?
Thanks
Ankit
Replies to this message go to everyone subscribed to this thread, not
directly to the person who posted the message. To post a reply, either
reply to this email or visit the message page: [
http://forums.adobe.com/message/3979020#3979020]
To unsubscribe from this thread, please visit the message page at [
http://forums.adobe.com/message/3979020#3979020]. In the Actions box on
the right, click the Stop Email Notifications link.
Start a new discussion in Adobe Reader by email or at Adobe Forums
For more information about maintaining your forum email notifications
please go to http://forums.adobe.com/message/2936746#2936746.

Can't Create a Data Source - Failed to test connection. [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied

Hi there,
I am having a serious issue with The Power BI Data Management Gateway which I am hoping that someone can help me with.
Basically I am setting a connection between a Power BI demo site and a SQL 2012 Database based on Azure. The Data Management Gateway and is up and running, and Power BI has managed to connect to it successfuly.
By following the tutorials at
here I was able to successful create my Data Connection Gateway with a self-signed certificate.
However, when trying to create the data source I come into problems. The Data Source Manager manages to successfully resolve the hostname, as per the screenshot below:
Bear in mind that I exposed the require ports in Azure as endpoints and I managed to modify my hosts file on my local machine so I could access the SQL server hosted in Azure using its internal name -- otherwise I would not be able to get this far.
However the creation of the data source also fails when trying to created it whilst logged in the SQL server in question:
The Data Source Manager returns the error when using the Microsoft OLE DB Provider for SQL Server:
Failed to test connection. [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied
I tried using the SQL Server Native Client 11.0 instead but I also get an error. This time the error is:
Failed to test connection. Login timeout expiredA network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if SQL Server is configured to allow remote connections. For more information see SQL Server Books Online.Named Pipes Provider: Could not open a connection to SQL Server [53].
Some considerations
If I provide an invalid username/password, the Data Source Manager does say that the username and password is incorrect.
Firewall is turned off in the SQL Server (either way, this error also happens if I try top use the Data Source Manager whilst logged in the SQL Server itself).
SQL Profiler does not show any attempt of connection.
The SQL server instance in question is the default one.
The error happens regardless if I select the option to encrypt connection or not.
In SQL Configuration manager I can see that all protocols are enabled (TCP/IP, Named Pipes and Shared Memory.
The Event Viewer does not provide any further errors than the one I have copied in this post.
I'm at a loss here. Could someone please advise what might I be doing wrong?
Regards,
P.

Here is what I had to do to solve this issue:
Basically I had to add the MSSQL TCP/IP port as an end-point in Azure. After I did that, then I was able to create the data-source. However, I was only able to authenticate with a SQL account, as any domain account would return me an error saying that the
domain isn't trusted.
What puzzles me here is how come the Data Source Manager would inform me that an account username/password was invalid, but it would fail/timeout if I provided valid credentials (!?!?!!?)

Problem with default file access permission

Hi,
I am accessing a common area '/NFS_DATA' by both my java and oracle codes by the users 'javaUsr' and 'oraUsr' respectively.
As per the requirement, the oracle code (oraUsr) needs to create some file in the specified location and then the java code (javaUsr) needs to update those files (created by oraUsr) with some new data.
At present scenario the 'oraUsr' creates files with default access permission 644, which does not permit 'javaUsr' to update them.
Constraints : I am not supposed to set umask at the .profile of 'oraUsr'.
Execution of any shell script from oracle procedure is not permitted.
Is it possible to specify file-system specific default file access permissions??
Any idea to overcome this issue??

Hi,
I am accessing a common area '/NFS_DATA' by both my
java and oracle codes by the users 'javaUsr'
and 'oraUsr' respectively.
As per the requirement, the oracle code
(oraUsr) needs to create some file in the
specified location and then the java code
(javaUsr) needs to update those files (created
by oraUsr) with some new data.
At present scenario the 'oraUsr' creates files
with default access permission 644, which does
not permit 'javaUsr' to update them.
Constraints : I am not supposed to set
umask at the .profile of 'oraUsr'.
Execution of any shell script from oracle
oracle procedure is not permitted.
Is it possible to specify file-system specific
default file access permissions??
Any idea to overcome this issue??You might like to try using File ACLs
man setfacl(1)
as oraUsr
setfacl -s user:oraUsr:rw-,user:javaUsr:rwx,group::r--,other:---,mask:rwx file
This way the oraUsr can not execute file
but javausr can
getfacl will show the ACL
user::rw-
user:javaUsr:rwx #effective:rwx
group::rw- #effective:rw-
mask:rwx
other:---
hope this helps a bit

Using iPhoto does it double up on memory space with pictures ?

Using iPhoto on the pad does it double up on memory due to all photos on pictures and iPhoto. It seems I am using a lot of memory due to photos

Off hand, I would guess "no". Although it may appear in multiple apps, it is the same photo.
Once you start editing, then you will find that the Photos app automatically saves the edited version to the Camera Roll while retaining the original.
iPhoto places edited photos in an "edited" album, and if it isn't already there, can also place a copy in the Camera Roll if you so chose.
I suspect all these additional "copies" are probably not full copies, but files containing the changes, referenced back to the original. A simple test would be to delete the original and see what happens to the "copies", but Apple might have that covered some way.
Just a guess from the reading I have been doing working with photos and iMovies.

Does Encoding AAC Files with VBR on Improve Audio Quality ?

Does Encoding AAC Files with VBR on Improve Audio Quality ?
Are there Disadvantages ?
Bonus Question 1:
Usually, an 'auto' type encoding tool will screw up the natural flow of the music and miss subtle changes in the energy, volume, etc.. -stuff that is just to subtle for it to catch -Generally I wouldn't trust an 'auto' type setting to pick up this subtle stuff. Yet people say using VBR improves sound quality (and NOT file size). Why and how ?
Bonus Question 2:
What is the max bit rate VBR uses ? If I set my AAC encoder to 320 kbps and turned VBR off, wouldn't the sound quality be superior to encoding with VBR on (simply because the kbps are set at 320 the whole time...) ? Sure, the files encoded with VBR off would be larger, but wouldn't the quality be better ?
Bonus Question 3:
Lastly, I did a little test and encoded one song with VBR off and one with VBR on. The VBR song was 1.5 MBs bigger - Huh, I thought, is that increased file size the result of improved resolution throughout the whole song, or just one little section (haven't had time to listen to them)?
Message was edited by: temptemp9

These are some pretty tough questions. I like VBR encoding in general, as it does allow for more complex passages to take advantage of higher bit rates while less complex passages fall back to a lower bit rate, while keeping within fairly consistent file size parameters. Whether VBR yields better results at different target/average bit rates is another matter, and really requires that you encode and properly test output files before deciding on anything but "recommended" settings.
At maximum lossy bit rates of 320 kbps, it doesn't make sense to use VBR. If I recall, the LAME MP3 encoder presets actually preclude VBR encoding for the highest quality files, and the same may be true for iTunes AAC.
I have to admit that to speak with any certainty or confidence about the issues surrounding your various questions, one would really need to encode a bunch of files with iTunes from lossless sources and test them in software such as foobar2000. I could investigate this easily on my own PC, but I don't encode music at 320 kbps AAC, since I have enough disk space to just listen to lossless files. iTunes doesn't display dynamic bit rate changes as foobar2000 does, and I haven't come across any Mac software that does as good a job of allowing for proper testing as foobar2000 for Windows does.
If you really need definitive answers to these three questions, then I think your best bet would be to do as I've hinted and use iTunes and foobar2000 if you've got access to a Windows computer to do this testing and evaluation for yourself, or sign up for a user account at Hydrogenaudio and post the same message there.

Does raid 0 double file access in a MP?

Similar Messages

Maybe you are looking for