I need help about distributed systems

Dear guys...
I search for answer about these question but not found the answer ,please help me?
1.What are the main objective and key issues of distributed systems address by Java EE and who can benefit from this system compared to other systems?
2. what is about Java EE based on distributed system evaluation criteria such as transparencies, reliability, security, performance and etc. I need summary?

oh .

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Need help about distributed sql statement

Hello everybody
Enviroment:
Oracle 11g R1.
This Database was fine, 'till some days ago that a new system was deployed on other database. New system runs some SELECT querys to a my database using db_links. These statements are blocking some resources and 'cause that they are blocking many users of my database. I can see on Enterprise Manager this wait event : "enq: TM contention".
Now my question is, why are these querys are blocking resources and users if they are only of type SELECT??? I thought that querys that did this were DML and DDL statements.
Does this behavior is related with that those querys are executed by a distributed way (using dblinks)??
Thanks a lot

user652447 wrote:
Distributed Transactions require commit even if a Select. See the following FAQ post from Jonathan Lewis for some basic information.
http://www.jlcomp.demon.co.uk/faq/dblink_commit.html
HTHNot always true though, it depends. The article you are linking to is quite old and covers, as stated, Oracle version(s): 7.0 – 9.2. Whereas the OP is on 11.
http://download.oracle.com/docs/cd/B10500_01/server.920/a96521/ds_txns.htm
In the section "Read-Only Response"
Note that if a distributed transaction is set to read-only, then it does not use rollback segments. If many users connect to the database and their transactions are not set to READ ONLY, then they allocate *rollback space* even if they are only performing queries.
In the OP's version
http://download.oracle.com/docs/cd/E11882_01/server.112/e17120/ds_txns003.htm#ADMIN12226
Note that if a distributed transaction is set to read-only, then it does not use undo segments. If many users connect to the database and their transactions are not set to READ ONLY, then they allocate *undo space* even if they are only performing queries.
However that doesn't account for the types of lock the OP is experiencing.

Need help about Hidden Markov Model model

I want to make classification for EEG signal using Hidden Markov Model
algorithm based on neural network.
plz need help about how to implement this algorithm using LABVIEW.
if not I want another thing to make classification.
any one know information about this topic, send me a reply
thanks

Have you derrived the HMM that you want to implement?
If so, post the algorithm and we can provide comments on how to implement it using LabVIEW.
Message Edited by Ray.R on 04-12-2010 12:54 PM

Need help about ref cursor using like table

Hi Guys...
I am devloping package function And i need help about cursor
One of my function return sys_refcursor. And the return cursor need to be
join another table in database . I don't have to fetch all rows in cursor
All i need to join ref cursor and another table in sql clause
like below
select a.aa , b.cc form ( ref_cursor ) A, table B
where A.dd = B.dd
I appeciate it in advance

My understanding is that you have a function that returns a refcursor and is called by a java app.
Because this is a commonly used bit of code, you also want to reuse this cursor in other bits of sql and so you want to include it like table in a bit of sql and join that refcursor to other tables.
It's not as easy as you might hope but you can probably achieve this with pipelined functions.
Is it a direction that code should be going down? yes, eventually. I like the idea of pulling commonly used bits of code into a SQL statement especially into the WITH section, provided it could be used efficiently by the CBO.
Is it worth the effort given what you have to do currently to implement it? possibly not.
what else could you do? construct the sql statement independently of the thing that used it and reuse that sql statement rather than the refcursor it returns?
Message was edited by:
dombrooks

Need help about boot SUNFIRE V120

Hi all....
I need help about how to change boot from boot net to boot disk....
after i installed sun solaris 10 at my sunfire v120, then reboot the machine ... this sunfire still boot from net not from disk...
can i change it?
please i really need help ....
thanks

If its booted, try "eeprom boot-device=disk"
If your at the OBP, "setenv boot-device disk".
If that doesnt work check the value of "diag-switch?".
It could be booting off the the diag-device instead

Need Help about 3D and revolving in illustrator

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Arsi

if links are not working try Copy and paste it in to your browser address bar
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Need help about the SHA Message Digest ? & what is use of Message Diagest ?

need help about the SHA Message Digest ? & what is use of Message Diagest ?
1>i have one program of making message digest
2>which requires two files name
3>one for input like txt
4> second is out put file of message digest
can any one tell what is the use of second generated file .

MessageDigest md = MessageDigest.getInstance("SHA");
FileInputStream fis = new FileInputStream(args[0]);
byte[] b = new byte[1024];
int readed = -1;
while((readed = fis.read(b)) > 0)
     md.update(b, 0, readed);
fis.close();
FileOutputStream fos = new FileOutputStream(args[1]);
byte[] d = md.digest();
StringBuffer sb = new StringBuffer();
for(int i = 0; i < d.length; i++) {
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     sb.append(str.length() < 2 ? "0" + str : str);
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fos.close();

Need help about 1015

need help about 1015 it says connect iphone to itunes on screen i did it but it doesnt work and says unexpected 1015

Try restoring it: Make sure you are following the instructions in this procedure to the letter. Here they are, with emphasis on some easily overlooked requirements:
Disconnect the USB cable from the iPhone, but leave the other end of the cable connected to your computer's USB port.
Turn off the device: Press and hold the Sleep/Wake button for a few seconds until the red slider appears, then slide the slider. Wait for the device to turn off.If you cannot turn off the device using the slider, press and hold the Sleep/Wake and Home buttons at the same time. When the device turns off, release only the Sleep/Wake button.
Continue pressing and holding the Home button while you reconnect the USB cable to the device. The device should turn on.
Note: If you see the "low battery" screen, let the device charge for at least ten minutes to ensure that the battery has some charge, and then start with step 2 again.
Continue holding the Home button until you see the "Connect to iTunes" screen. When this screen appears (iTunes icon and USB connector) release the Home button.
If necessary, open iTunes. You should see the "recovery mode" alert ("iTunes has detected a phone in recovery mode").
Use iTunes to restore the device.
If you do not see the "Connect to iTunes" screen, try these steps again.
If you see the "Connect to iTunes" screen but the device does not appear in iTunes, see this article and its related links.
If you have backed up the iPhone in the past, select the device in iTunes and choose "restore from backup".

Hi, Need help about ios7 upgrade, after this upgrade I cannot watch youtube or any video with my Ipad,

Hi, Need help about ios7 upgrade, after this upgrade I cannot watch youtube or any video with Ipad, and Iphone as well
I think my wireless rooter's setting has some problem but cannot found anything to solve,
I can watch if there is another wireless network , I tried this option in another place who has wireless network and I can watch.
Do you have any idea to do these setting , I dont have any problem when Ipad has 6.1.3 IOS,
need help
thanks

Thanks
I will and share the result.

[Athlon64] Noob needs help optimizing new system

Sorry to post yet another thread, but I've been lurking for the past few days and I only get bits and pieces of what I need. I'm pretty clueless about this stuff as it's my first home-built system
See my sig for system info...
I'm needing help with bios settings. The pertinent stuff (I think - hopefully I got it all down):
CELL MENU
CPU Clock speed: 2200
DDR Memory Freq: 100.0 MHz
High performance mode: Manual
Cool n quiet: Disable
HT Freq: 800 MHz
Dynamic overclocking: Disable
Adjust CPU Ratio: Auto
AGP Freq: By Default
HT Voltage: Auto
Mem voltage: Auto
CPU voltage: Auto
AGP Voltage: Auto
Spread sectrum: Disable
DRAM
DRAM Clock Mode: Manual
Mem clock value: DDR200
CAS Latency: SPD
Burst Length: 8 Beat
Bank Interleaving: Auto
Active to CMD (Trcd): SPD
Active to precharge (Tras): SPD
Precharge to active (Tvp): SPD
DRAM IT Timing: Disable
ADVANCED CHIPSET FEATURES
AGP Mode: Auto (this is "greyed out")
AGP Fast write: Enabled
AGP Aperture size: 128
VLink 8X supported: Enabled
My questions mainly concern memory. I bought all this stuff at the Tiger Direct outlet store in Naperville, Illinois. I had intended to buy the K8T Neo-FSR (754 pin), but they were supposedly out of the 754 pin 3400+, and this board/CPU combo had a $100 rebate. Yeah, it's one of those deals with the odd 939 pin 3400+ that everyone has been talking about.
In any case, I already had the Corsair CMX512-3200C2PT picked out, as Corsair said it was compatible with the board. I wasn't aware of the MSI compitibility chart until I came here later that night. I STILL can't find that chart off of the MSI web site.
Anyway, I got it all hooked up and got the standard 4 red LEDs. Not knowing what to do, I took it back to Tiger Direct and the tech played around with it until he stuck an el-cheapo stick (Corsair VS512MB400) in there and it worked. But it only works in slot 2. So here I am.
I started to run memtest86, but it took too long to run and I aborted it for now. For what it's worth, it said the RAM CAS value is 2.5-2-2-5. I don't know what the hell that means, but I know it's important.
My questions:
1. I assume I need manually to set my memory clock value to DDR400?
2. Now that I can get the thing to post, is there any chance I could get the "good" Corsair memory to work by setting the correct latency/CAS values? Again, I don't know what I'm talking about, so forgive my ignorance. What I'm wondering is if I can set everything to what Corsair recommends while I have the cheap memory in there and then replace it with the good stuff?
3. With this board, am I better off with double-sided or single-sided sticks? As I said, I went into the store intending to buy the Neo 754-pin board, but they were out of the Athlon 3400+ in 754 and only had the 939 pin.
4. Anything else in my bios settings that stand out and need to be addressed? I want to make sure everything is optimized.
EDIT: I almost forgot: My CPU temp is runing around 42-49 degrees. Am I in the danger zone? I just bought a generic cooler for now and intend to get a Thermalright XP-120, but I can't find it locally, so it will have to wait.
AND FINALLY...
I don't know if this is related to anything above, but I have been having a hell of a time getting the 6600GT to run DirectX9+ games. The latest drivers for Windows 98SE was 66.94. Yes, XP will be installed soon, but for now... It was failing on dxdiag test for Direct3d 9 and also the third DirectDraw test. I was about to give up and take it back when I discovered that a new beta driver came out today (71.84). I installed it and it passed all of the dxdiag tests. I thought I was in hawg-heaven, but when I run Call of Duty (the only DX9 game I have besides HL2), it slows to an absolute clawl. The level starts out somewhat normal at first, but quickly slows down to the point that performance can only be measured in seconds per frame! All of the patches 1.5 and 1.51 for UO have been installed, but that shouldn't make a bit of difference.
If I don't get my CoD fix soon I'm gonna reinstall that Geforce3.
Thanks much and sorry again for such a long post.

Thanks everyone for the recent replies, but I started this thread almost a month ago (March 3rd), and much has changed since then.
New PSU (see sig).
Replaced the PNY Geforce6600GT with a eVGA 6800
Added another stick of the Corsair Value Select 512 RAM. I didn't even bother trying to get the "primo" CMX stick to work. I just returned it.
Went from Windows 98SE to XP Home.
The PSU did nothing for me at all, but I suppose it's better to have some headroom in the amperage.
The biggest performance booster was the additional 512MB of RAM. It wouldn't have done me any good in 98SE, but I was shocked at how much it helps XP. Quitting a game is almost instant now, where before it would take a good two minutes or so for XP to recover itself.
As for games running slow, the 6800 fixed it right up. CoD absolutely screams now, as does everything else I've thrown at it (HL2, Doom 3, Far Cry). I think the 6600GT was just bad or there is a serious driver problem with the 6600GT's. Went from 3DMark03 score of around 5000 (when it didn't crash) to above 9000 now. And this was all before adding the additional RAM.
Oh yeah, I bought a 74GB Raptor. No RAID for now though. So far I'm not real impressed with the performance. I'm running off of the VIA controller, since my board doesn't have the Promise controller. I don't see much improvement in loading times as compared to the 40GB 7200rpm Maxtor I have running on IDE1. The only time it beats the pants off the Maxtor is defragging. But there's only so much entertainment value in that. The Sandra "file system benchmark" gave me 57 MB/s, which seems pathetic, but I've read some posts here where others are getting an identical rate.
And I'm not too happy to discover, too late, that my overclocking capabilities are severely limited while using SATA.
I do have one more question for now:
When I installed the second 512MB stick, I originally had both sticks in slot 1 and 2. I ran Sandra's memory bandwidth benchmark and got a much lower score than with the single stick (around 3500 MB/s). WHen I had the sticks in 1 and 3, it jumped up to close to 6000 MB/s. Why is that? Just curious.

Need help about career life

Hi All,
Em..i just need some advice about choosing correct career path.I graduated with a first class in IT with business information science in 2009. In 2009 after looking for jobs for few months i took a manager post in a petrol station which i never wanted.(Due to the credit crunch & the Family financial reasons) .Then unfortunately i had to stay out of work for 18months due to a serious spinal code operation i had to face.now in 2011 July im fit & ready to start my life again. but im lost where to start/ which career path to choose. (i've still got the job at the petrol station as the manager)
ive liked data base management subject when i was in the University so, Ive been reading OCA-051 & interested on OCA qualification I just want to know what are the possible jobs i can apply if i get the certification? Basically what should i do to get any IT related job? :( ( i dont like programming)..
Please be kind to reply.
ps:i live in the Uk.
Thanks.

872882 wrote:
Hi All,
Em..i just need some advice about choosing correct career path.I graduated with a first class in IT with business information science in 2009. In 2009 after looking for jobs for few months i took a manager post in a petrol station which i never wanted.(Due to the credit crunch & the Family financial reasons) .Then unfortunately i had to stay out of work for 18months due to a serious spinal code operation i had to face.now in 2011 July im fit & ready to start my life again. but im lost where to start/ which career path to choose. (i've still got the job at the petrol station as the manager)
ive liked data base management subject when i was in the University so, Ive been reading OCA-051 & interested on OCA qualification I just want to know what are the possible jobs i can apply if i get the certification? Basically what should i do to get any IT related job? :( ( i dont like programming)..
Please be kind to reply.
ps:i live in the Uk.
Thanks.You'll sit on your bum and ruin your back again with most IT jobs. With your government shrinking, OCA qualification won't have much worth unless you personally know someone in the private sector that needs help. An operator job with your petrol company (assuming it's not just a mom 'n pop station) would probably require heavy lifting.
IT is a good, solid, growing career path, but most of the work is still programming, and most ways up to better jobs go through that experience. You might be an exception if you have a way to join other skills with your IT education, such as business analysis or sales or web prettyfying. Perhaps the determinants are your personality and goals.
I know, it's tough, but if you are honest with yourself and check out some of the "what color is my parachute" kinds of career advice books, you can find a happy medium. There actually are some benefits in starting a career during economically troubled times, but you only see that in retrospect. You have to decide on goals, pursue them vigorously, and reevaluate when it doesn't work for you.

Need help about using sqlplus_exec_template.sql

I tried to use sqlplus_exec_template.sql to execute our deployed mapping. At dos prompt I typed :
C:\>sqlplus username/[email protected] @C:\OWB\owb\rtp\sql\sqlplus_exec_template.sql
rtschema localhost SQL_LOADER CRD_APPL_MAPPING SKIP=0,LOAD=0,LOG_FILE
NAME=cvcpmapl.log,DIRECT=true,PARALLEL=false,ERRORS=50,ROWS=200,READSIZE=65536,BINDSIZ E=50000,AUDIT=true,PURGEGROUP=wb,target_store_uoid=F0E49963A42E4DB6AFF
85FFF8E05AB9E
SQL*Plus: Release 9.2.0.1.0 - Production on Fri May 16 18:32:25 2003
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production
Session altered.
Role set.
Stage 1: Decoding Parameters
| location_name=localhost:1521:odb
| task_type=SQL_LOADER
| task_name=CRD_APPL_MAPPING
Stage 2: Opening Task
declare
ERROR at line 1:
ORA-20001: Task not found - Please check the Task Type, Name and Location are
correct.
ORA-06512: at line 261
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production
=================================================
I am quite sure the task name and task type is correct. The task name is same as the one I saw in runtime repository schema -> table WB_RT_TASKS -> column TASK_NAME
, but I am very doubt about what should be the correct input for LOCATION, system parameter and custom parameter.
Can anyone give some help about where could I find the correct input for those parameter?
Thx in advance.
Rds
CH

I 've tried to use :
sqlplus username/[email protected] @C:\OWB\owb\rtp\sql\sqlplus_exec_template.sql
rtschema OWBLOCATION SQL_LOADER CRD_APPL_MAPPING "," ","
where OWBLOCATION I have used the deploy location of the mapping for my case, created within OWB. The value is CCS_DEPLOY.
But the error is the same :
======================================================
Stage 1: Decoding Parameters
| location_name=CCS_DEPLOY
| task_type=SQL_LOADER
| task_name=CRD_APPL_MAPPING
Stage 2: Opening Task
declare
ERROR at line 1:
ORA-20001: Task not found - Please check the Task Type, Name and Location are
correct.
ORA-06512: at line 261
========================================================
could you tell me the SQL used by WB_RT_API to get the task from runtime schema. So that I could check the correct location myself.
Or how could I view the pl/sql of WB_RT_API_EXEC which is wrapped.
Thx for your help.
Rg.
CH

Need Help About AC or battery or pc :(

Hello!
i am kinda new to the forum,i have GT70 2pe dominator pro laptop(bought from ibuypower) When i play demanding games,my ac unplugs itself from the laptop i dont know what to do ,i updated ec,bios,did the ec reset,battery calibration(from msi support page), but i did these long time ago i dont know if this started then or the problem was already on pc when i bought it,i didnt test playing demanding games before i did those things
I tried playing w/o battery sometimes when the game loads laptop shuts down
So i really need help..?

i think i have the correct model,well if it is going to fail can i use it until i buy a new one 2 weeks later?,i mean is this going to do harm to my computer until i get a new one?
Thanks for the help (sorry about the full sized picture)

Need help about my c3-00 v7.20

after i updated my phone's software to 7.20, icannot connect anymore to wlan because its won't ask for a connection type anymore and automatically uses gprs.
what will i do?
and also there's a a note that is appearing in my recording folder named "BGSA_upload blahblah" is it normal or a virus?
need help. thanks

Hi,
The BGSA_upload.log is part of the system files and this is actually used as a system log. Please be assured that this is not a virus as S40 devices are not infected by viruses. On the other hand, you would need to delete this file as it may take up space on your memory card.
WLAN connection has been asked many times in this forum and many link available by searching already, but here is the WLAN settings for you:
Select Menu > Settings and Configuration > Preferred access point — View the saved access points and choose the preferred WLAN access point.
Select Menu > Settings > Connectivity > WLAN > Internet Connection :Ask first
you are asked for the connection method every time you open an application that requires an Internet connection such as Browser or Mail.
Select Menu > Settings > Configuration > Personal settings >
Add > Web > account name "My Web" and use preferred access point "yes"
Br
Mahayv

Need help about how to capture the name of an object before inserting.

Hi everybody,
how i can capture the name of an object before it inserts in a table.
i will use a pre-insert trigger to do this, but i don't know how to specify the name of the object that's inserting.
any help about this issue will be appreciated.

Mentioning objects you mean: You have a procedure which inserts data into some table and this procedure needs to know the name of the caller (another procedure or ...)
Can this be of some help http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:382218730166 ?
Regards
Etbin

I need help about distributed systems

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