Re: graphics in hadoop
chandravadana wrote: ya.. will write up in hadoop wiki.. is there a way other than copying from local filesystem to hdfs... like writing directly to hdfs...? Can you patch jfreechart to write directly to HDFS files? That is the only way to do it right now, unless you can mount the HFDS filesystem under linux using FUSE -steve
Re: graphics in hadoop
Thanks steve.. will try working on the patch.. S.Chandravadana Steve Loughran wrote: chandravadana wrote: ya.. will write up in hadoop wiki.. is there a way other than copying from local filesystem to hdfs... like writing directly to hdfs...? Can you patch jfreechart to write directly to HDFS files? That is the only way to do it right now, unless you can mount the HFDS filesystem under linux using FUSE -steve -- View this message in context: http://www.nabble.com/graphics-in-hadoop-tp19853939p19992110.html Sent from the Hadoop core-user mailing list archive at Nabble.com.
Re: graphics in hadoop
chandravadana wrote: hi Thanks all.. ur guidelines helped me a lot.. i'm using Jfreechart... when i set System.setProperty(java.awt.headless, true); i'm able to run this properly... this is good; consider writing this up on the hadoop wiki if i specify the path (where the chart is to be saved) as local filesystem.. i'm able to save the chart.. but if i set path to be hdfs, then i'm unable to... so what changes do i need to make.. You'll need to copy the local file to HDFS after it is rendered. Thanks Chandravadana.S Steve Loughran wrote: Alex Loddengaard wrote: Hadoop runs Java code, so you can do anything that Java could do. This means that you can create and/or analyze images. However, as Lukas has said, Hadoop runs on a cluster of computers and is used for data storage and processing. -If you are trying to do 2D graphics (AWT operations included) on unix servers, you often need to have X11 up and running before the rendering works - You need to start whichever JVM runs your rendering code with the property java.awt.headless=true; you can actually set this in your code. -if the rendering code uses the OS/hardware, then different hardware can render differently. This may not be visible to the eye, but it makes testing more complex as the generated bitmaps can be slightly different from machine to machine -steve -- Steve Loughran http://www.1060.org/blogxter/publish/5 Author: Ant in Action http://antbook.org/ -- Steve Loughran http://www.1060.org/blogxter/publish/5 Author: Ant in Action http://antbook.org/
Re: graphics in hadoop
ya.. will write up in hadoop wiki.. is there a way other than copying from local filesystem to hdfs... like writing directly to hdfs...? Thanks S.Chandravadana Steve Loughran wrote: chandravadana wrote: hi Thanks all.. ur guidelines helped me a lot.. i'm using Jfreechart... when i set System.setProperty(java.awt.headless, true); i'm able to run this properly... this is good; consider writing this up on the hadoop wiki if i specify the path (where the chart is to be saved) as local filesystem.. i'm able to save the chart.. but if i set path to be hdfs, then i'm unable to... so what changes do i need to make.. You'll need to copy the local file to HDFS after it is rendered. Thanks Chandravadana.S Steve Loughran wrote: Alex Loddengaard wrote: Hadoop runs Java code, so you can do anything that Java could do. This means that you can create and/or analyze images. However, as Lukas has said, Hadoop runs on a cluster of computers and is used for data storage and processing. -If you are trying to do 2D graphics (AWT operations included) on unix servers, you often need to have X11 up and running before the rendering works - You need to start whichever JVM runs your rendering code with the property java.awt.headless=true; you can actually set this in your code. -if the rendering code uses the OS/hardware, then different hardware can render differently. This may not be visible to the eye, but it makes testing more complex as the generated bitmaps can be slightly different from machine to machine -steve -- Steve Loughran http://www.1060.org/blogxter/publish/5 Author: Ant in Action http://antbook.org/ -- Steve Loughran http://www.1060.org/blogxter/publish/5 Author: Ant in Action http://antbook.org/ -- View this message in context: http://www.nabble.com/graphics-in-hadoop-tp19853939p19986476.html Sent from the Hadoop core-user mailing list archive at Nabble.com.
Re: graphics in hadoop
hi Thanks all.. ur guidelines helped me a lot.. i'm using Jfreechart... when i set System.setProperty(java.awt.headless, true); i'm able to run this properly... if i specify the path (where the chart is to be saved) as local filesystem.. i'm able to save the chart.. but if i set path to be hdfs, then i'm unable to... so what changes do i need to make.. Thanks Chandravadana.S Steve Loughran wrote: Alex Loddengaard wrote: Hadoop runs Java code, so you can do anything that Java could do. This means that you can create and/or analyze images. However, as Lukas has said, Hadoop runs on a cluster of computers and is used for data storage and processing. -If you are trying to do 2D graphics (AWT operations included) on unix servers, you often need to have X11 up and running before the rendering works - You need to start whichever JVM runs your rendering code with the property java.awt.headless=true; you can actually set this in your code. -if the rendering code uses the OS/hardware, then different hardware can render differently. This may not be visible to the eye, but it makes testing more complex as the generated bitmaps can be slightly different from machine to machine -steve -- Steve Loughran http://www.1060.org/blogxter/publish/5 Author: Ant in Action http://antbook.org/ -- View this message in context: http://www.nabble.com/graphics-in-hadoop-tp19853939p19967434.html Sent from the Hadoop core-user mailing list archive at Nabble.com.
graphics in hadoop
hi does hadoop support graphics packages for displaying some images..? -- Best Regards S.Chandravadana This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Any unauthorized review, use, disclosure, dissemination, forwarding, printing or copying of this email or any action taken in reliance on this e-mail is strictly prohibited and may be unlawful.
Re: graphics in hadoop
Hi, Hadoop is a platform for distributed computing. Typically it runs on a cluster of dedicated servers (though expensive HW is not required), as far as I know it is not mean to be a platform for applications running on client. Hadoop is very general and not limitted by nature of the data, this means that you should be able to process also image data. Regards, Lukas On Tue, Oct 7, 2008 at 10:51 AM, chandra [EMAIL PROTECTED] wrote: hi does hadoop support graphics packages for displaying some images..? -- Best Regards S.Chandravadana This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Any unauthorized review, use, disclosure, dissemination, forwarding, printing or copying of this email or any action taken in reliance on this e-mail is strictly prohibited and may be unlawful.
Re: graphics in hadoop
and is there any method for creating an image file in hadoop..? chandravadana wrote: hi does hadoop support graphics packages for displaying some images..? -- Best Regards S.Chandravadana This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Any unauthorized review, use, disclosure, dissemination, forwarding, printing or copying of this email or any action taken in reliance on this e-mail is strictly prohibited and may be unlawful. -- View this message in context: http://www.nabble.com/graphics-in-hadoop-tp19853939p19855082.html Sent from the Hadoop core-user mailing list archive at Nabble.com.
Re: graphics in hadoop
Hadoop runs Java code, so you can do anything that Java could do. This means that you can create and/or analyze images. However, as Lukas has said, Hadoop runs on a cluster of computers and is used for data storage and processing. If you need to display images, then you'd have to take these images off the HDFS (Hadoop distributed filesystem) and on to your local desktop. Alex On Tue, Oct 7, 2008 at 3:50 AM, Lukáš Vlček [EMAIL PROTECTED] wrote: Hi, Hadoop is a platform for distributed computing. Typically it runs on a cluster of dedicated servers (though expensive HW is not required), as far as I know it is not mean to be a platform for applications running on client. Hadoop is very general and not limitted by nature of the data, this means that you should be able to process also image data. Regards, Lukas On Tue, Oct 7, 2008 at 10:51 AM, chandra [EMAIL PROTECTED] wrote: hi does hadoop support graphics packages for displaying some images..? -- Best Regards S.Chandravadana This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Any unauthorized review, use, disclosure, dissemination, forwarding, printing or copying of this email or any action taken in reliance on this e-mail is strictly prohibited and may be unlawful.
