A question about learning Streams Replication

Hi
I'm going to learn Streams Replication , I want to know that, do I need study all "Oracle® Streams Concepts and Administration" document (http://download.oracle.com/docs/cd/E14072_01/server.112/e10704/toc.htm) before study "Oracle® Streams Replication Administrator's Guide" (http://docs.oracle.com/cd/E18283_01/server.112/e10705/toc.htm) ?
Thank you

There are several docs at MOS with examples and steps on how to configure various Streams scenarios. Both the Packt and Oracle Press books are very good. Going through these items will make the Oracle docs much easier to digest.
Edit
See: Master Note for Streams Setup Scripts (Doc ID 789445.1)
Edited by: stevencallan on Nov 14, 2011 9:12 AM

Similar Messages

Question about live streaming screen capture

Hi,
at my office we conduct live video broadcasts using widows media encoder, and we're working on moving away from it to a newer method, which most likely will be something flash related.
how the procedure is done today is that a user logs in the windows media encoder program, starts the broadcast, the broadcast starts building an asf file in the server people watch, our users get the link and they join. once the broadcast is finished, the host that did the broadcast exits and saves the file, in the video server. the broadcast is a screen capture presentation of what a host has in his computer.
I want to achieve this or something similar, using a broadcast on flash streaming, so that both, users can log to a link we provide to them, the video server saves the file (preferably as .flv) and of course the broadcast is done nice and smoothly without interruptions or gaps (or at least with a minimum amount).
my question would be,
what process do you guys use to broadcast ? say other members. I'm talking about a simultanous broadcast for about 200 people, I guess it's similar to the numbers that you handle.
I'm pretty wide open on slight modifications on the process, such as maybe the host of the broadcast, saving the broadcast file in his computer and uploading it into the video server afterwards, although I would pprefer of course if it's pushed directly.
resources that I have available:
we have a windows media server -the one we're using right now, and we also have an adobe flash media server, with full license. we have a flash encoder but so far we haven't been able to figure out how to maintain a screencapture broadcast. it works, but only for about 2 minutes and then the player stops reproduction of the broadcast, however the encoding still goes on.
so, while you can answer my request, if you can talk about your broadcasting experience, on broadcasting screen capture...
I am open to all recommendations and suggestions, and I am thankful to all your responses.

~~~~~~~~~~~~~~~
application.onPublish = function(clientObj, streamObj)
 var objToday = new Date(),
 weekday = new Array('Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday
 dayOfWeek = weekday[objToday.getDay()],
 domEnder = new Array( 'th', 'st', 'nd', 'rd', 'th', 'th', 'th', 'th', 'th', 'th' ),
 dayOfMonth = streamTimestamp + (objToday.getDate() < 10) ? '0' + objToday.getDate() + domEnder[
objToday.getDate()] : objToday.getDate() + domEnder[parseFloat(("" + objToday.getDate()).substr(("" + o
bjToday.getDate()).length - 1))],
 months = new Array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'S
eptember', 'October', 'November', 'December'),
 curMonth = months[objToday.getMonth()],
 curYear = objToday.getFullYear(),
 curHour = objToday.getHours() > 12 ? objToday.getHours() - 12 : (objToday.getHours() < 10 ? "0"
+ objToday.getHours() : objToday.getHours()),
 curMinute = objToday.getMinutes() < 10 ? "0" + objToday.getMinutes() : objToday.getMinutes(),
 curSeconds = objToday.getSeconds() < 10 ? "0" + objToday.getSeconds() : objToday.getSeconds(),
 curMeridiem = objToday.getHours() > 12 ? "PM" : "AM";
 var streamTimestamp = curHour + curMinute + curSeconds + curMeridiem + "_" + curMonth + "-" + d
ayOfMonth + "-" + curYear + "_" +clientObj.ip;
 streamObj.savename = streamTimestamp;
 // a race can happen during republish. if onPublish is called
 // before onUnpublish, we need to wait for onUnpublish to
 // complete before calling onPublish for the new stream.
 if (streamObj.publishing == true)
 // onUnpublish has not been called yet
 //trace("Unpublish pending...");
 streamObj.publishingClient = clientObj; // save and call onPublish later
 return;
 streamObj.publishing = true;
 trace("onPublish : " +streamObj.name+ " with File Time Stamp: " +streamTimestamp);
~~~~~~~~~~~~~~~~~
application.onUnpublish = function(clientObj, streamObj)
 trace("onUnpublish : " + streamObj.name);
 trace("onUnpublish : " + clientObj.ip);
 var s = application.s[streamObj.name];
 if (s && s!= undefined)
 s.record(false);
 s.play(false);
 s.liveEvent = "";
 application.s[streamObj.name] = null;
 var fileObject = new File("streams/_definst_/"+streamObj.name+"/"+streamObj.name+"Seg1.f4f");
 fileObject.copyTo("store/"+streamObj.name+"_"+streamObj.savename+".f4f");
 trace("This Publish was successfully copied to : " +application.name+"/store/"+streamOb
j.name+"_"+streamObj.savename+".f4f");
~~~~~~~~~~~~~~~~~~~

A question about constant streaming...

Hello all,
This question is a complete curiosity of mine and doesn't need answers detailed down to the nuts and bolts level. Just an overview with a bit o' tech would be sufficient.
Let's say you had either video files or audio files that you wanted to broadcast continuously, like internet radio. Either the same file(s) in a loop, or in a predetermined stream...or maybe a random selection? People could then log on to your website to watch/hear the live stream, again, like Internet radio.
Could this be done with FMSS or would one need FMIS to create a daily/weekly/monthly playlist?
Many thanks in advance!
Sincerely,
wordman

I did not get your question correctly though i will just try answering.
Don't know whether that would good way of doing it - may be you can use some other server-side technology to get say XML based playlist and then client plays those files from VOD and Live - it will require solid client side scripting and some other server-side technology along with FMS (if you are using FMSS)

New hard drive and have a question about photo stream.

My hard drive recently crashed. I have a new hard drive and am trying to organize my iphoto again. There are 1,000 photos on my iphone (photo stream) how do I get these onto my mac? My mac only has the last 30 days. Do I have to save each individual photos to the camera roll?

G9daniel wrote:
Is there a way to get user settings returned to what they were before?
Not unless you have a Time Machine backup of your system.
If you kdo you can just boot from the SL install disc and use that yo restore your system to the new HDD.

I have a question about Photo Stream.

Three iPhones in a family. iPhone 1, 2, 3.
iPhone 2 & 3 share the same Apple ID together which is iPhone 3’s email account
iPhone 1 sends an invite to 2 and 3
iPhone 2 accepts and name of that user displayed on iPhone 1 user is correct
iPhone 3 accepts but name shows up as iPhone 1 user on iPhone 1’s device
A test invite was sent to iPhone 3 from another outside iPhone user and after accepting invite, name still shows up as iPhone 1 user.
I asked iPhone 1 user is he syncs iPhone 3 user to his pc and he said he does but iPhone 3 user has a separate user account on his MAC. (iPhone 2 user doesn’t sync to mac at all)
Would anyone have an idea as to why it is being displayed this way? If I missed something and it is not clear, please let me know. Thanks for your help.

Read through this:
http://support.apple.com/kb/ts4379

Confused about Photo Stream

So, I have Photo Stream turned on my iPhone, and i enabled it on my macbook on iPhoto, I see the pictures from my phone there. So does that mean I can delete the photos from my iPhone photo stream now? Or how do I permanently save the photos from iPhoto so they're not deleted?

Hi Carrasco 95,
If you have questions about Photo Stream, you may find the following article helpful:
iCloud: Photo Stream FAQ
http://support.apple.com/kb/HT4486
Regards,
- Brenden

Hi I have a question about shooting in Raw with my Canon EOS 6d. I'm in the process of learning photography and my goal was to start shooting in raw. I have Photoshop CS5. When I tried to edit my images in raw I received an error message stating, "The pho

Hi I have a question about shooting in Raw with my Canon EOS 6d.
I'm in the process of learning photography and my goal was to start shooting in raw.
I have Photoshop CS5. When I tried to edit my images in raw I received an error message stating, "The photoshop camera raw plug-in did not recognize the format. If these files are from a camera, you may need to update your camera raw plug in."
In researching the issue I read that to edit in raw you need a camera model requirement of at least 7.3 which only works with CS6. My version of CS5 is 6.0.0.205. Being new to all this I see that my options are to upgrade to CS6 or convert by using DNG converter and paying a monthly fee. Two things I know nothing about and don't know which is would be more beneficial.
I'd appreciate any advise on which route to go and how upgrade and what it may cost. THANKS in advance!
Heather

In researching the issue I read that to edit in raw you need a camera model requirement of at least 7.3 which only works with CS6.
That is correct. Your camera was first supported by Camera Raw 7.3. Camera Raw 7.3 will not work with CS5. You need CS6 or CC.
Being new to all this I see that my options are to upgrade to CS6 or convert by using DNG converter and paying a monthly fee. Two things I know nothing about and don't know which is would be more beneficial.
I'd appreciate any advise on which route to go and how upgrade and what it may cost.
It all depends on your preferred workflow and your budget.
Using the DNG converter is free. There is no monthly fee. You use the converter to convert all Raw files from the EOS 6D to DNGs then edit the DNGs in CS5. That's an extra step every time - every photo. Some people don't like the extra step. Others don't mind.
Camera raw, DNG | Adobe Photoshop CC
Or you can upgrade to CS6 (non-Cloud) and pay the upgrade fee
Creative Suite 6
Or join the Cloud and pay the monthly fee
Or join the Photoshop Photography Program (US9.99/month) and get PS CC+LR

Questions about mac mini iTunes server, streaming to macbook pro, ipads, etc.

I'm thinking about getting a mac mini to work with my NAS as a iTunes server. I have a bunch of questions about this. I will have two iPhones, a few iPads, and a laptop that will be accessing the files. I have iTunes match. This is basically to keep an always on computer for hosting the music/movies. My questions are as follows . . .
#1 Are there any good, comprehensive guides to show you how to do this?
#2 Can the movies be accessed when not at home on the shared network?
#3 Can the iPads or the macbook pro download the shared movies to be stored locally?
#4 Back to #3, how will it work on my macbook pro with listening to music (I have iTunes match)? Say i go to library and I break out my macbook pro and I don't have internet. What happens if I download music while at home onto my macbook pro to listen to it when I go to the library? Will i start a new library on my macbook pro? How will that mesh with the home server when I come back.
#5 Is there a way to mirror files or folders? So something that I have on my macbook pro will also mirror on the home server.
Thanks for your help on this. I'll post any follow up questions.

seanfenton wrote:
1. I want to replace the Optical drive with a 2TB SATA. can I use this 2.5 inch?
I do not know if it is the same model number, but this one will work in your MBP:
http://eshop.macsales.com/item/SEAGATE%20OWC/ST2000LM003M/
2. I want to replace the HD with a 128GB SSD 840. When I replace these drives, will my OS still be in tact? I have never done this job before.
No. You will have to format the drives in Disk Utility>Erase to Mac OS Extended (Journaled) and then install the OSX by using the original install disks.
3.) I want to replace the ram sticks to max capacity. This is 2 2GB sticks, Correct?
No. An early 17" 2008 MBP will accept 6GB RAM with the following specifications: 200-pin PC2-5300 (667MHz) DDR2 SO-DIMM. The best sources of Mac compatible RAM are OWC and Crucial.
4.) Most difficult...
I want to extend the monitor wirelessly to a projector. I thought about using Apple TV and Airplay. However, support for airplay is for MacBooks 2011 and newer. I thought of using a PS3 and the media server, but I think this brings on a format compatibility issue. (my library is so large I could not afford to convert all my movies to MP4.) So, how would you recommend I put my extended monitor with VLC player onto a projector?
Could I possibly connect the MBP to a Mac Mini as an extension? would this work natively? I would rather use a VGA cord than F with 3rd party app BS.
Cannot help you there.
5..) I want to Bypass iTunes this time around. I would prefer to use Finder and VLC to manage all of my music. I mostly play all my music on shuffle, so, could I create a playlist on VLC with all of my music and play it randomly? (im sure this is possible but i'd like to organize all my plans with confirmation.)
You are not obligated to use iTunes.
6.) Can i upgrade the keyboard to backlit? i've read that this is possible.
All MBPs have back lighted keyboards. Your either needs a NVRAM reset or a repair.
Ciao.

Extensive IO after Configuring DB Streams Replication

Hi all,
 
I'm learning on configuring and managing Oracle Streams Replication.
 
I managed to configure a bidirectional Database replication using the PRE_INSTANTIATION_SETUP and POST_INSTANTIATION_SETUP procedures in the DBMS_STREAMS_ADM package between two databases (DB1 and DB2). I used RMAN DUPLICATE command for instantiation.
 
Here is my question:
 
Once the configuration is finished, I noticed an extensive IO activities on the hardisks in both DB1 and DB2, although there were no DML or DDL against any of the databases by users. Is that normal in Oracle Streams environment? What is the reason of it? May be it is this way only in the first few hours of finishing this configuration and eventually the IO will become stable.
 
Oracle 10g R2 on Windows XP SP2

Could be the writing of data dictionary to redo logs on target and the mining of it on the source.
Did it stop after a while?

Streams replication in Oracle XE.

Hi,
I'm planning an implementation of Oracle Streams replication. Some of the considerations and facts are stated below.
1. DDL Changes will be maintained.
2. Replication will be Bi-Directional.
3. The operating system on the source and downstream sites are the same.
4. The hardware and operating system architecture on the source and downstream sites are the same.
5. Both the source database and the downstream database are be running Oracle Database 10g (details below).
Source Database
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Beta
PL/SQL Release 10.2.0.1.0 - Beta
CORE 10.2.0.1.0 Beta
TNS for 32-bit Windows: Version 10.2.0.1.0 - Beta
NLSRTL Version 10.2.0.1.0 - Beta
Downstrean Database
Personal Oracle Database 10g Release 10.1.0.2.0 - Production
PL/SQL Release 10.1.0.2.0 - Production
CORE 10.1.0.2.0 Production
TNS for 32-bit Windows: Version 10.1.0.2.0 - Production
NLSRTL Version 10.1.0.2.0 - Production
Here I have found that Oracle XE (source) is not supporting the local capture process.
My questions:
1. Can I consider downstream capture in this scenario? (As I have Personal Oracle Database 10g Release 10.1.0.2.0 as downstream database)
2. In case of archive log downstream capture what will be the most efficient way of redo log transportation.
Thanks in advance.

1. In a RAC cluster? The name I would put in the scripts is "insanity." Why? You are going to bring this instance to a crawl.
2. No problem in doing a transformation. The problem was in your first question.
3. I wouldn't worry much about monitoring it. I'd just get a stopwatch and see how many seconds before it crashes.
If the data is in one schema in the database then just make it available, via object privs, to the others. Replicating it, as you have described, is likely going to be a painful experience in far more ways than just wasted storage.

Questions about the content of download meeting recording .zip file

I tried posting this on the resurrected Connect forum, but my Adobe ID wasn't recognized there....
Concerning the files that are included in the .zip file of the meeting recording that can be downloaded:
1) Is there any documentation describing the files and their contents (i.e. what each file represents, what each XML element and attribute in those files represent)
2) Are there any files that capture mouse movement on a shared desktop?
Thank you!

Hi Sean,
Regarding your first post:
Thanks Jorma! I don't have access to an FMS build at the moment but I'm quite certain it's there. As for contacting Jaydeep, I am 90% sure he authorized us to broadcast his email on here if folks had questions about the tool, but, in the case that I'm wrong and he didn't - I'm going to double-check first.
Regarding your most recent post..
"To be clear, the most critical goal I'm trying to accomplish is to create an automated process that will download the recording meeting at its highest quality in a consistent and reliable manner".
I personally believe this is possible; unfortunately, I haven't seen it done yet. If your recording contains:
- audio
- a camera feed
- screensharing
Then I think you might be able to get this going. If it contains shared content, like a shared PPT, this gets trickier.
"To do this, of course, I have to reproduce some of the functionality that Connect provides, starting and combining video and audio streams according to the instructions in the control files."
Exactly right. If your recording didn't contain shared content, then all you've got on your hands are a bunch of audio/video files that you could edit together as you wanted with your favourite video editing tool. If it contains shared content, here's (at a high level) what's happening.
For shared PPTs or FTContent files:
First (for version 9 recordings only), Connect reads the information on the Shared Content's location and SCO within mainstream and indexstream and validates it before loading it. I don't recall this happening to the same extent with version 8 or earlier, but maybe it was. Now, if the content is validated (ie. Connect can find it) the share pod will display as black, if it doesn't, you get an empty pod with an message like "No content is being shared" or something like that.
Connect then looks at the actual FTContent file, and loads the content that is to be shared using the file path and sco ID listed in here. It's important to note that the SCO ID and file path in here will likely not be the same as the original file you uploaded to your room, it's a new SCO id (I believe SCOs of this type are called referenced scos) and new path.
Now...if I was going to build some sort of player which would play all these files in one screen to make a recording...I might not want to use Connect's code here. If you know the file path to the shared content (from FTContent), you could easily view it with the content URL (conveniently also in FtContent). I'm not a coder, but I'm envisioning something like Presenter's GUI where you've got the presentation's content in the main area, and a video file (if there is one) playing back on the side.
Anyways, food for thought if you want to try to go about this. Connect recordings are incredibly complex and they come with a big learning curve, but if you can make sense of them the knowledge is quite valuable.

A lot of questions about my MacBook Air

I am really new to re-using Apple computers.The last time I used an Apple computer was back in 1987 when the school and my family had Apple IIGS computers. I have been using PC's which reqiure Microsoft. I a lot of have questions (10 questions) about my MacBook Air and I hope you good people can and will help me.
Product: MacBook Air
Operating System: Mac OS X Version 10.7.4
1) I Downloaded MacKeeper because I was fooled. I had a bad feeling just before I Downloaded it and I should have listened to my heart. However, I didn't buy it or fully Install it. It was like a test run and then they wanted me to pay almost $100 for it. Thankfully, I didn't because I read it is Malware. I spoke with an Apple Tech at Apple Care and he helped me get rid of it (or so we think). I don't see it anymore on my computer. I read it can slow down your computer. How can you tell if it's really off of the computer?
2) When I open "Finder" and I see that there are people Sharing my computer with me. I went into AirDrop and it reads, "Other people can see your Mac as (my name) MacBook Air when their computer is nearby." I bought a HotSpot and while it's turned on and I selected it as my WI-FI connection I thought it would get rid of these people, protect what I type, me, my items, computer, etc. But it didn't.
I didn't know that I have to buy a exteral CD and/or DVD Player in order to connect to the brand new Modem and Router in one by NetGear. I am so used to PCs and the CD/DVD Players being built inside.
The people at Apple Store told me that there is an internal modem inside, but I don't know how to find it and what to do then. Should I use a Firewall?, An AntiVirus, AntiMalware, AntiSpyware, etc. Apple Care tech told me I don't need to get an AntiVirus.
3) Is there a new kind of Wireless Modem and Router that doesn't require a CD-ROM?
4) When I travel or fly and I am not close to home I was told by Best Buy and Sprint that I had to buy a mobile HotSpot to use the computer (WI-FI) safely. As I typed, I have one. But it's pretty expensive and only gives me 1 hour and 15 minutes per day to Stream. What can I do to use this computer safely Online when I am out of range from a Modem and Router? What do people do when they travel on airplanes?
5) This compter won't let me use "Raid." I think you have to have a newer version. I hard about Raid on the radio from Leo (can't recall his last name) who's a Tech expert.
6) Should I buy a ZipDrive? Apple Store Tech told me that I didn't need a ZipDrive. I just remember the episode of HBO's "Sex and The City" when Carrie looses everything because her copy crashed. Now, of course, I know that's a fictional show, but with PC's and Microsoft I have lost everything when it crashed, frooze up, etc. I know there's iClouds. I heard about Carbonite, but I have read the Pros and Cons about it. Mostly they are Cons about it. I just don't want to do anything wrong and mess up this computer.
7) Should I buy a new Printer/Copier/Scanner because mine is an HP. It's not new, but it works. I even have a CD-ROM for Macs. What about the new product called, "Neat"?
8) Is there a special product that I should buy to do Online Banking and/or other important stuff?
9) I saw and read about iWork in the Apps Store and it sounds cool. I still have alot of friends and colleagues who still use Microsoft. Is iWork good to use? Should I Download it from the Apple Apps Store or can a buy it at Apple? Is there another Word Processing Program that is great and user friendly and will work with Macs and PCs?
10) Should I Update the OS with OS X Mountian Lion Pro from the Apple Apps Store or buy it at Apple Store?
In advance, I wish to thank you in this Apple Support Communites for your help. Have a safe and happy holiday weekend!

1) Here are instructions for removing MacKeeper. Since it mostly consists of manually looking for folders and specific files, if you follow the instructions you either fail to find what you are told to find (because your AppleCare guide gave you complete instructions which you followed) or you'll find some additional files that need to be replaced.
2 & 3) I assume you are looking at the sidebar of a Finder window and seeing Shared and computers under it. Those are computers that you can potentionally share. To do so you'd need an account on their computer and a password. They are not sharing your computer.
AirDrop allows you to create an adhoc network for filesharing and it only functions when you have selected the AirDop item in the SideBar. Actually doing that merely announces to computers in the same network node that your computer is available for a file to be sent to. Even then you have to explicitly allow the file to be downloaded to your computer. Similarly you'd be able to see other computers with AirDrop selected and be able to send them a file - which they'd have to accept.
The only reason your NetGear Router comes with a CD is to install and run their 'easy' step by step configuration program. It can also be done manually with a browser. Read the manual to find the IP address you must enter to access the router's configuration menu. Apple's WiFi routers don't require a CD to install the software because the configuration software is already on your computer.
I do have my firewall turned on. AntiVirus software isn't a bad idea - I use Sophos having tested it for a review for our local User Group and I found I liked it better than ClamAVx which is what I'd been using before. Both are free.
4) I think you were scammed by Sprint and BestBuy. I use hotel, coffee shop, and restaurant WiFi spots and have for years. However, because they can be unsecured, I do not shop online or bank when I'm using them. I also use 1Password and don't reuse passwords so even if a sniffer should grab an account and password that's all it would get - one account.
5) Raid doesn't really make sense with a MacBook Air - a RAID involves 2 or more disks being used as if they were one.
6) Zip drive? No. External hard drive - yes. It isn't a question of if a computer's hard drive will malfunction, it is when. OWC has a nice selection of external drives and the Mac has a built in backup system called TimeMachine. Due to the way TimeMachine works, I've found that your TimeMachine drive should be at least twice as large - and preferably 3-4 times as large as the data you are backing up.
7) if your printer works and it has Mountain Lion drivers, why replace it?
8) Online banking is done with a browser - Use Safari or FireFox
9) If trading files with Windows users is important Mac: Office is your best bet. If not, iWork, Mac:Office, or LibreOffice are all good possibilities.
10) you can only buy Mt Lion via the App Store.

Question about download file in OAS4

Question about download file in OAS4:
I use Oracle Application Server 4.0.7 on my Windows NT 4.0 SP6;
I use PL/Sql Cartridge developer a document system; It's use the
upload/download in PL/Sql Cartridge;
I read the document , the Upload/download in Pl/Sql Base on the
Oracle Application Server's Content Service. the Problem is when I
download a document, If I upload a Html or MsWord file, It will store in a LongRaw column, when me download ; It's tell me can't
find a application to open this file; I will select a application
from list to open the download file;
As normal, It will open MsWord Automatic when download a "doc" file ; also It will open a new window of Browser to view a Html file;
I check the download process on client Browser; when download
file, The content-type always return "application/octet-stream";
Also the download File will lost the postfix of the file,
So Browser don't open the File Automatic;
I think If I set the correct Content-Type , Browser can know how open the file; So I use owa_content.set_content_type procedure
set the Doc file to "application/msword" , but the WEb Server always
return "application/octet-stream";
I didn't know how to do this problem, Plese help me.
null

I have a Tecra M2 and rely on your email update to ensure I have the latest drivers on my machine.
When I received a Toshiba support email on 14 April 2005 giving reference to a QFE from Microsoft I assumed it would be necessary for my Tecra.
I was very confused when I found that this QFE and subsequent ones posted on the 16 April 2005 relate to Pre SP2 critical updates no9t required if one has already taken earlier advice of updating to Service Pack, at the very least your narrative should make mention of this. I find it very difficult to believe that your updates are two+ years out of date.

PL/SQL web service: question about stub

hello,
I'm currently learning how to work with PL/SQL Web Services.
I have a question about stubs. The point is, I can deploy a web service to the OC4J server and it works. It also works when I create a stub following the WSDL I made with creating the PL/SQL web service. If I go to the endpoint in my webbrowser, the functionality is the same, with or without using a stub.
My question is: what is the function of the stub?

A stub is leveraged by a client application to communicate with a corresponding server side object (in this case, the web service implementation). If you think back to CORBA or RMI applications they follow a similar pattern.
In the case of a web service you would use the stub to write a client application that could invoke the methods of the remote service and return the responses as java data types. The methods the stub class offers are the same as the methods of the web service interface. It's a common way for providing RPC like functionality.

A Question about RAW and Previews

I have just recently starting shooting in RAW (mostly for the post production editing abilities - I am an avid amateur photographer bent on learning as much as I can). I set my camera to capture in RAW + L. I don't know why I feel like I want it to capture both the RAW and JPEG file, and thus leads me to my first question: Is it necessary to have the camera capture both the RAW and Large JPEG? I am assuming the answer to be no, as I am sure if after importing the RAW file into Aperture, you could always export a JPEG if you wanted one? So no need to fill up your internal memory (if using managed masters) with the extra JPEG? Is this thinking correct?
Next, if you do import RAW-only files and then want to export certain images, do you have a choice to export the original RAW image? It seems that it only allows you to export a JPEG Original Size. To answer my own question, perhaps you have to export the Master in order to export the full RAW file when exporting? If you want to export a JPEG, you have to export not the Master, but a version of the Master? Is this correct?
Lastly, I wanted to ask a question about Previews. I have my preferences set so that previews have the highest quality with no limits to size. What is the significance of setting it this way? I just assumed that if I wanted to share an image at the highest quality without exporting it, this was the way to go. Is there any validity to this? The reason I ask is that I don't want to have all of these high quality previews taking up internal disk space if I really don't need to. Is there a way to change the preview size once previews are created? Meaning, if you have it set to generate low quality previews, can you change it dynamically to high and vice versa?
I know this is a lot in one post. Thanks for tackling it.
Mac

You can change the quality of the Previews in the Preferences -> Previews tab.
You can regenerate Previews with the Delete and Update Previews under the Images menu.
Regards
TD

A question about learning Streams Replication

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