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Hi All,
We are starting a project (.NET/C# DB: SQL Server) and one of the main requirements is performance and reliability (the system is a "mission-critical" one).
Could you please indicate articles/books/sites that could help us on:
- Defining the minimum hardware requirements (how many redundant servers should be considered, RAIDs, etc.) based on the expected number of user/requests,ammount of data etc.
- Technologies that could be used in order to support the desired reliability ( distributed services, load balance for example)
Thanks a lot,
Sergio
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Hi,
I have implemented in the code for wmi. It works just fine for cimv2 workspace and Win32_OperatingSystem class.
It is not working for any other class (i need Win32_CDROMDrive) in cimv2 namespace. Not even working for root/wmi namespace.
Is there anything else that I need to do?
Please help.
Thanks ,
Manasi
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The connection is completely seperate from the class your requesting. Does the connection work? Then you execute a WMI Query on that connection. If the connection works on one class, it'll work for every class, so long as the client machine supports that class AND has an instance of it to return.
We'd have to see the code your using to request this class to make any more recommendations.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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Thanks for your reply .My connection works. Please find a part of my code:
(uReturn value is always zero for any class other than Win32_OperatingSystem,for which it is 1)
IWbemServices *pSvc = NULL;
hres = pLoc->ConnectServer(
_bstr_t(L"ROOT\\cimv2"),NULL,NULL,0,
NULL,0,0,
&pSvc);
if (FAILED(hres))
{
AfxMessageBox(_T("Could not connect"));
pLoc->Release();
CoUninitialize();
return 1;
}
AfxMessageBox(_T("Connected to ROOT\\wmi WMI namespace"));
hres = CoSetProxyBlanket(
pSvc,
RPC_C_AUTHN_WINNT,
RPC_C_AUTHZ_NONE,
NULL,
RPC_C_AUTHN_LEVEL_CALL,
RPC_C_IMP_LEVEL_IMPERSONATE,
NULL,
EOAC_NONE
);
if (FAILED(hres))
{
AfxMessageBox(_T("Could not set proxy blanket"));
pSvc->Release();
pLoc->Release();
CoUninitialize();
return 1; }
IEnumWbemClassObject* pEnumerator = NULL;
hres = pSvc->ExecQuery(
bstr_t("WQL"),
bstr_t("SELECT * FROM Win32_CDROMDrive"),
WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
NULL,
&pEnumerator);
if (SUCCEEDED(hres)){
IWbemClassObject *pclsObj = NULL;
ULONG uReturn = 0;
while (pEnumerator)
{
HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,
&pclsObj, &uReturn);
if (FAILED(hr)){
AfxMessageBox("Failed");
}
if(0 == uReturn)
{
break;
}
VARIANT vtProp;
hr = pclsObj->Get(L"Name", 0, &vtProp, 0, 0);
CString OS = vtProp.bstrVal;
AfxMessageBox(OS);
VariantClear(&vtProp);
}
if(pclsObj) pclsObj->Release();
My connection is made..in tha last step, after querying, uReturn value is zero, and loop breaks.
Where am i going wrong? I am a beginner in this. Please excuse if there is some silly mistake i did.
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My VC++ is very rusty. You should be asking this question in the Visual C++ forum.
Dave Kreskowiak
Microsoft MVP - Visual Basic
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I have a problem with my fairly new Asus mainboard, it's a P5WD2-E Premium. If I set the Bios to enable the usb ports to run at 480MBs then try to boot with my USB keyboard and mouse attched, the computer locks up on the initial windows boot screen. My step dad had a similar problem with his Asus mainboard. Is this a common problem and/or is there a fix to it. Please help if you can, it's really frustrating.
Posted by The ANZAC
p.s. My Bios is up to date, the problem has occurred before and after the update. I am using a microsoft wireless keyboard and a no-name optical mouse.
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I found a solution to my problem, I hope this helps anyone else with the same or a similar issue:
USB Configuration:
USB Function : Enabled
Legacy USB Support : Auto
USB 2.0 Controller : Enabled
USB 2.0 Controller Mode : HiSpeed
BIOS EHCI Hand-Off : Disabled
USB Mass Storage Device Configuration:
USB Mass Storage Reset Delay : 20sec
Emulation Type : Auto
Posted by The ANZAC
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Sir/Madam
I am Final Year Engineering student. I want to get information about connection of computers at different cites.
Actually if I want to computerize a department of any company which have its offices at several cities then what steps I should follow.
Means how I can connect that no of computers in appropriate manner to get desired output.
I want to make it just like railway reservation system through in which if I enter data at same time then database must be able to prioritize data in sequence to enter in database.
Which database & platform or language I should use to code this kind of project.
What hardware i need to do so.....
Thank You
Ashish Porwal
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You need a good consultant, this can go wrong in so many ways.
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hi , can any one tell me about goood link to deal with firewall , antivirus and POP blockers..systems.... i m network eng.(primary stage) and facing lot of problems b'coz of these....they are for protection of comps bt some time create a lot of issues while installing small office or home networks...
rituparn....
RST
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That's a VERY vague question. What do you mean by "deal with firewall , antivirus and POP blockers..systems"?? Are you trying to setup a network??
Dave Kreskowiak
Microsoft MVP - Visual Basic
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Grisoft is good for all PC security utilities. Grisoft
Trinity: Neo... nobody has ever done this before.
Neo: That's why it's going to work.
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Does anyone have one of these?
I need some help with something and would appreciate anyone with experience on such units.
Cheers
Gav
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Hi,
I am trying to install windows 2003 Evaluation version on my laptop (Acer). The text setup works ok. When the system reboots, I can see windows 2003 logo for a little amount of time and then the screen goes blank; very similar as if I have shutdown my computer.
I tried flashing the ROM, but no joy. I think it has something to do with display. Can anyone help me out in this ?
I know there are couple of techies all round here...can anyone please guide me.
Thanks
Sameer
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Sounds like you installed the wrong video driver. Restart the computer and press F8 during the POST to get the boot menu. Pick the safe mode option from the menu to boot in VGA mode. From there you can install the correct driver.
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Thanks for the reply Mike. But that didn't work either.
Thanks
Sameer
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there are lot of things which might be wrong.
give some more info like.
are you able to install the OS completely?
if yes then
are you able to boot into safe boot if you restart?
if yes then
also try to boot by attaching some other monitor(CRT) also.
might be display is on some other device.
if still is doesnot work contact your acer vendor.
this might be the known issue for gfx driver on your platform.
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Hi DP,
Thanks for the reply.
Yes, I am able to install the windows 2003 text mode setup smoothly. The setup then reboots the system to start the GUI setup. I can see the windows 2003 logo for a short while and then the screen goes blank. However, the power button light continues to glow that means the system is still ON, but nothing comes on screen!!!
I searched for this case but nothing seems to work. I come to know that windows 2003 requires console redirection monitor but I didn't find any such setting in BIOS of my laptop.
I am unable to start in safe mode as well. I haven't tried using another monitor as I don't have one and I can't afford to buy one for this cause.
I tried using recovery console but even that didn't solve the problem. It seems like I may not be able to install W2k3 on my laptop.
The configuration of my laptop is Pentium celeron 1.2 GHZ. 512 MB DDR2 RAM. LCD Monitor, 40 GB HDD, DVD recorder, etc.
Any help will be highly appreciated.
Many Thanks,
Sameer
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Hi Sameer,
When the system reboots after text setup( I think you are using unattended installation )and you see the windows progress bar at that time your graphics driver also is getting started so that OS can bring the system to High Res mode from VGA mode.
If there was some problem with sys BIOS or video bios than you wont see the post or windows progress bar. And graphics driver are part of your OS installation. I think there is something wrong with the Gfx driver configured for your gfx chipset. It may have some issues with ACER shipped platforms. It would be really difficult to point the problem without actually debugging  . I work on gfx drivers, i've seen and worked on similar issues but there can be 'n' reasons for this problem. I would suggest you not to tweek a lot with system and take help from your vendor of Acer because they will definitely help you here.
Thanks,
Dhirendra
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Hi Dhirendra,
Thanks for the reply.
I will accept your suggestion and would consult a technician from Acer.
Thanks.
Sameer
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My DVD-Burner seems to have given up the ghost, but only partially.
I burnt an ISO of a movie to the disk, and the disk plays in an external DVD player but the drive will not see the disk it just burnt.
Anyone hear of this happening before. All the ones I had go in the past just went and would not read or write anything.
This is really odd.. The only thing I can think of is I am also using a new batch of blanks. Maybe the disks have something to do with it.
Do writers use different lasers for reading a writing?
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I had an old Plextor CD-R drive that I bought when 4x was the norm for CD-R speeds. It performed flawlessly until I got some faster disks (16x I think). When I tried to burn to such a disc, the drive would act like everything was ok, but the resulting disc was a coaster and unusable. I still have no idea WTF the drive wouldn't handle faster media. 
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Michael Dunn wrote: I still have no idea WTF the drive wouldn't handle faster media.
I bought a spindle of CDs once that had a warning in the package about using older CDRW drives and that they may need firmware upgrades to use the faster blanks.
These DVDs I am using do not have any speeds listed on them... Maybe I will try burning at a lower speed and see if that helps.
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Sound like cheap disks - I had that problem once and reducing the speed sorted it.
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