Re: Graph job stuck after map 100% completed

2016-02-17 Thread khaled . ammar
Hi Ni‎shant,It looks like there is no enough memory to hold the data. How much aggregate memory available in your cluster? Thanks, Khaled

Giraph out-of-core feature is not helping!

2015-12-04 Thread Khaled Ammar
Hi, I am using Giraph-1.1.0 to do large graph processing. I was trying to do a hashMin (WCC) algorithm on a large graph but it failed with out of memory error. I thought the out-of-core option may help, but it did not. Is there any advice about how to enable out-of-core processing? I followed

Re: How to accelerate performance of Giraph Job?

2015-07-24 Thread Khaled Ammar
Hi Udbhav, Please tell us more about your cluster setup, and your Hadoop version and configuration. Thanks, -Khaled On Fri, Jul 24, 2015 at 9:16 AM, Udbhav Agarwal udbhav.agar...@syncoms.com wrote: Hi, Am running Giraph Job for 1,00,000 connected vertices for shortest path calculation.

Re: InMemoryVertex Format(s)

2015-06-04 Thread Khaled Ammar
%40mail.gmail.com%3E In my experience, Blocks framework is much easier to use and it naturally suit your needs. On Wed, Jun 3, 2015 at 11:02 AM, Khaled Ammar khaled.am...@gmail.com wrote: Thank you Sergey, This is exactly what I am looking for. I would like to run multiple computation classes

Re: InMemoryVertex Format(s)

2015-06-03 Thread Khaled Ammar
do you want to use I/O formats? You can use different computation classes within one application and you don't need to do I/O between them. All intermediate results can be kept in vertex and edge data. Regards, Sergey Edunov On Tue, Jun 2, 2015 at 12:46 PM, Khaled Ammar khaled.am

InMemoryVertex Format(s)

2015-06-02 Thread Khaled Ammar
Hi all, There are InMemory input and output format for giraph. These could be useful when a specific computation should be executed until convergence and then another computation is needed. Instead of writing intermediate results to HDFS and read it again, InMemoryVertex format sounds very

Re: Is it possible to traverse a linear list (line graph) parallely in giraph?

2014-12-30 Thread Khaled Ammar
I don't think Giraph is suitable for this task because in this case you probably want to visit graph vertices in order which leaves no chance for parallelization. In fact, even running a shortest path query on such graph will not perform as good as it would in web or social network graphs. These