Hi,
I'm indexing my application logs to ElasticSearch and I am planning to maintain the history of logs for an year or so. Is there any size limit that I need to consider before hosting the ElasticSearch instance !!
The amount of data a node can hold depends on your data, how you index and map it, shard size and heap size. The amount of heap required for indexing an querying also plays a part. If you describe your data and use case you might be able to get some pointers but the best way to find out is to test.