I'm trying to understanding the purpose of B+ Tree and Index Pages for
Apache Ignite as described here:
https://apacheignite.readme.io/docs/page-memory
I have a few questions:
1. What exactly does an Index Page contain? An ordered list of hash code
values for keys that fall into the index page and "other" information that
will be used to locate and index into the data page to store/get the
key-value pair?
2. Since hash codes are being used in the index pages, what would happen
if collision occurs?
3. For a "typical" application, do we expect the number of data pages to
be much higher than the number of index pages ? (since data pages contain
key-value pairs)
4. What type of relation exists between a distributed cache that we
create using ignite.getOrCreateCache(name) and a memory region? 1-to-1,
Many-to-1, 1-to-Many, or Many-to-Many?
5. Consider the following pseudo code that starts two server nodes:
Ignite ignite = Ignition.start("two_server_node_config");
IgniteCache<Integer,String> cache = ignite.getOrCreateCache("my_cache");
cache.put(7, "abcd");
1. How does Ignite determine the node where to put the key into?
2. Once the node is determined, how does Ignite locate the specific
memory region the key belongs to?
Thanks
