[infinispan-issues] [JBoss JIRA] Issue Comment Edited: (ISPN-78) Large object support

[ https://issues.jboss.org/browse/ISPN-78?page=com.atlassian.jira.plugin.sy... ] Olaf Bergner edited comment on ISPN-78 at 3/29/11 8:01 PM: ----------------------------------------------------------- Wouldn't a non streaming API somehow defeat this feature's sole purpose? It is my understanding that it is driven by the desire to store objects the size of which exceeds that of every single JVM in the cluster, correct? If that is indeed the case, it would be *impossible* to store such an object without first fragmenting it into pieces each of which fits into a single node's heap. So we need a streaming API to read a large object from some place - think file - outside the current JVM's address space in order not to blow up that JVM's heap. It is out of the question that this approach considerably complicates matters, but I don't see a way around it. Ah, I see. Stupid me. Streaming to disk means writing a large object directly through to the cache store, without actually caching it in memory. Might make sense in some cases, though it could be argued if in this case Infinispan would really act as a "cache". We would still need a streaming API, though. Anyway, IMHO we should first concentrate on implementing the "fragmentation approach" and then check back whether streaming to disk might make sense. One step at a time. was (Author: O.Bergner): Wouldn't a non streaming API somehow defeat this feature's sole purpose? It is my understanding that it is driven by the desire to store objects the size of which exceeds that of every single JVM in the cluster, correct? If that is indeed the case, it would be *impossible* to store such an object without first fragmenting it into pieces each of which fits into a single node's heap. So we need a streaming API to read a large object from some place - think file - outside the current JVM's address space in order not to blow up that JVM's heap. It is out of the question that this approach considerably complicates matters, but I don't see a way around it. Ah, I see. Stupid me. Streaming to disk means writing a large object through directly to the cache store, without actually caching it in memory. Might make sense in some cases, though it could be argued if in this case Infinispan would really act as a "cache". We would still need a streaming API, though. Anyway, IMHO we should first concentrate on implementing the "fragmentation approach" and then check back whether streaming to disk might make sense. One step at a time. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira