Keen for suggestions on a JMS impl that meets these requirements...
Hi All
We have hit some glitches with a set of geophysical migration jobs we are doing on a server cluster. I have been asked to distribute some of the work amongst several servers in the cluster (the current distribution mechanism is not working out) and need some mechanism for messaging between the jobs.
The guys here are quite keen to get something up quickly for the moment and I have suggested we might be able to use a lightweight JMS implementation for starters.
Could anyone suggest one that meets the following criteria?
- Reliable
- Fast
- Easy learning curve (as we are on a tight deadline).
- Supports guaranteed delivery
- Easy to develop with (ie junit friendly)
- OpenSource
- Works on linux
We can make the following concessions...
- Point to point only required at the moment
- No need for fancy configuration front ends
- No immediate scaling requirements.
Thanks
I'm completely biased, but ActiveMQ seems to fit the bill perfectly
http://activemq.org
James
http://logicblaze.com/
Open Source SOA
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Looking for Camcorder or Video Recording DSLR That Meets Detailed Needs
I do apologise for asking a question that may have been answered but whose answer I have not been able to find. I think once you read my requirements you may understand why.
I am looking at being able to take video of places I go to. In the past I have used my semi pro camera system to take photos and to make movies from these with added music. Over time I am wishing that I had also taken a camcorder to record those memorable occasions which are fading in my mind.
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5/ Want to be able to use filters on camcorder lens.
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10/ Be capable of being able to record wildlife at distances of up to 500 metres or more. I do not like digital zoom, preferring to use optical zoom.
11/ Being able to record fast moving objects (cheetahs to aircraft)
12/ Being able to transfer data to a backup storage device whilst travelling. This may not be feasible.
13/ Being able to play back what has been recorded to review all.
Now here is a problem. I am limited in budget (approximately £1200 to £1500), and also do not enjoy carrying suitcases around with me. Suitcases go missing an awful lot. I tend to travel with a carry on bag weighing up to 12 kg (including camera system & backup device).
If there were a digital SLR camera I might go for something like that (e.g. Panasonic DMC-GH1). Problem with this camera is that it records in AVCHD at the top levels and at Motion JPEG for 720p and below. The GH1 wraps its 24 fps movies in an interlaced 60 fps file. It is possible to use the Motion JPEG codec, though you have to drop the resolution to 1280 x 720 (at 30 fps), and deal with a 2GB file size limit. Would love to use my existing Nikkor lenses, but again not necessary.
I do understand I am unlikely to get such a system in my price range, but what is the closest system on the market, or coming soon that meets my requirements (whether DSLR with video or Camcorder which means I still carry my DSLR).
Thank you very much for taking the time to read all this.Evening Tom,
Thanks for your response. What I am able to tell you about the Panasonic DMC-GH1 is: -
It can record full high definition motion pictures compatable with the AVCHD format or motion pictures recorded in Motion JPEG.
Audio will be recorded in stereo and Dolby Digital Stereo Creator format.
In AVCHD there are a number of possible settings. In all cases the aspect ratio is 16:9.
1/ FHD = 1920 x 1080 pixels, 17 Mbps, 50 frames per second interlaced (sensor output is at 25 fps)
2/ SH = 1280 x 720 pixels, 17 Mbs, 50 frames per second progressive (sensor output is 50 fps)
3/ H = 1280k720 pixels, 13 Mbps, 50 frames per second progressive (sensor output is 50 fps)
4/ L = 1280k720 pixels, 9 Mbps, 50 frames per second progressive (sensor output is 50 fps)
In Motion JPEG the possible settings are
1/ HD = 1280 x 720 pixels at 30 fps and an aspect ration of 16:9
2/ WVGA = 848 x 480 pixels at 30 fps and an aspect ration of 16:9
3/ VGA = 640 x 480 pixels at 30 fps and an aspect ratio of 4:3
4/ QVGA = 320 x 240 pixels at 30 fps and an aspect ratio of 4:3
AVCHD Movies can be recorded continuously for up to 29 minutes 59 seconds. Motion picture recorded continuously in MOTION JPEG the limit is up to 2 GB (approximately 8m 20 seconds) in any one scene.
Regards,
Hval -
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ERD software that meets these needs?
I'm looking for ERD software that meets the following criteria. I've been using JDeveloper but finding it lacking in these areas. Perhaps someone can enlighten me with a hidden setting to solve any of these?
1. I have made an ERD for my database, but a year has passed and it needs to be updated: I want to import the changes in such a way that neither the relative locations of the tables nor the lines are moved. I've been using Oracle JDeveloper, this is fine for tables but my lines turn to spaghetti and I have to re-position all of them whenever I sych changes from the DB.
2. Can add text to the diagram, like a title and date, and can draw shapes on the diagram, like a rectangle around a group of tables to highlight that they are related. (I didn't find this in JDeveloper, so I was importing the document into Adobe Illustrator to add text and other shapes.)
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Thanks!Gene,
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3. Use the Note drawing component to add text and labels and use the Group to group elements (both of these are found in Diagram Annotations (an accordion in the Component Palette). These are here because our database diagrammer is also based on UML diagram framework
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5. In the latest release you will also find new reporting facilities for database models. New - Offline database - reports and prebuilt-reports will allow you to report using a SQL interface on your elements and produce HTML documents of these
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rgds
Susan
susanduncan.blogspot.com -
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Revision: 19866
Revision: 19866
Author: [email protected]
Date: 2011-01-21 10:05:44 -0800 (Fri, 21 Jan 2011)
Log Message:
Set delivery mode to PERSISTENT for JMS destinations that have durable set to true. If messages aren't persistent they won't be saved by the JMS server. This is kind of important when you want the messages to be durable.
Modified Paths:
blazeds/trunk/qa/apps/qa-regress/WEB-INF/flex/messaging-config.mods.xmlAccording to Bea Customer Support this is the normal behavior. If you kill a durable topic subscriber and reconnect it with the same id to another node, the old subscription is deleted and all messages still waiting to be delivered are gone.
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