gridgain

问题 I am a newbie on GridGain and I have a problem with the heap size on my cache. I have a CSV file with 2.000.000 ~ 3.000.000 lines, the size of the file is 600~800 megabytes, but when I load this data into my cache on GridGain I need 5~7 gigabytes. Can I reduce the size of the data in the cache? Or do I need 5~7 gigabytes to save a file with 600 megabytes? 回答1: Here are the things that can affect memory consumption: Number of backups configured. If you have, for example, 1 backup configured,

问题 I am connecting to GridGain Cluster and I keep seeing the following error in the logs, I am also noticing the client connections dropping/reconnecting quite frequently (although been new to the platform I am not sure if this is normal behavior). [12:41:35,548][WARN ][grid-nio-worker-0-#53%null%][GridTcpRestProtocol] No marshaller defined for NIO session, using PROTOBUF as default [ses=GridSelectorNioSessionImpl [selectorIdx=0, queueSize=0, writeBuf=null, readBuf=null, super=GridNioSessionImpl

问题 We are upgrading from 2.3 to 2.4 & realized that a change made in IgniteSpringBean which is referenced in this added line in its javadoc resulted in us moving lots of references in PostConstruct to handleContextRefresh. " A note should be taken that Ignite instance is started after all other Spring beans have been initialized and right before Spring context is refreshed. That implies that it's not valid to reference IgniteSpringBean from any kind of Spring bean init methods like PostConstruct

问题 I am using Grid.startNodes(java.util.Collection, java.util.Map, boolean, int, int) as defined here: http://gridgain.com/api/javadoc/org/gridgain/grid/Grid.html#startNodes(java.util.Collection, java.util.Map, boolean, int, int) Code I am using: GridConfiguration cfg = GridCfgGenerator.GetConfigurations(true); Grid grid = GridGain.start(cfg); Collection<Map<String,Object>> coll = new ArrayList<>(); Map<String, Object> host = new HashMap<String, Object>(); //host.put("host", "23.101.201.136");

问题 I see that with a change introduced in 2.4 in IgniteSpringBean to delay ignite instance start until all other spring beans are initialized may have broken Ignite SpringTransactionManager resulting in inability to configure it for Spring transaction abstraction of Ignite transactions. I really, badly need to find a way to work around this. Any ideas/suggestions anyone? Below is the line from IgniteSpringBean java doc "Ignite instance is started after all other Spring beans have been

问题 I understand from the docs that replicated caches are implemented using partitioned caches where every key has a primary copy and is also backed up on all other nodes in the cluster & that when data is queried lookups would be made from both primary & backup on the node for serving the query. But i see that the default cache write synchronization mode is PRIMARY_SYNC, where client will not wait for backups to be updated. Does that mean i have to explicitly set it to FULL_SYNC for replicated

问题 I am working on batch processing problem. Solution needs to handle failing hardware. There is master node (which initiates tasks executions) and worker nodes which execute the jobs. I know how failover of worker nodes works but I could not find any information about failover of master nodes. Whenever master node which started a task fails the whole task is canceled. Is there any way to finish task processing then? Could you suggest the best way of implementing failover of master node? Kind

问题 I got a partial answer here but not exactly what I wanted. The link describes how to get a list of task futures but what I'd really like to be able to do is list out and cancel individual jobs (that might be hung, long running etc etc). I've seen another post implying that this is not possible but I'd like to confirm (see second link) Thanks http://apache-ignite-users.70518.x6.nabble.com/How-can-I-obtain-a-list-of-executing-jobs-on-an-ignite-node-td8841.html http://apache-ignite-users.70518

问题 Is there a means of reconfiguring the GridCacheConfiguration at runtime for GridGain? The end goal is to be able to add a grid cache at runtime after having started up the Grid. final GridConfiguration gridConfiguration = new GridConfiguration(); gridConfiguration.setMarshaller(new GridOptimizedMarshaller()); Grid grid = GridGain.start(gridConfiguration); ... <later on> GridCacheConfiguration newCacheConfig = ...; //defines newConfig grid.configuration().setCacheConfiguration(newCacheConfig);

问题 Can anyone help me in guiding to use grid gain, The documentation on website is not enough and confusing. We have to run thousands of simulations in the LAN. can anyone help me in running compute grid on multiple hosts in a LAN. I am able to run compute example on multiple nodes on same host, but not on multiple nodes on multiple hosts. Kindly help. 回答1: Compute examples are configured to work with local host settings. All you have to do is update IP addresses in examples/config/example