Hi, Please properly subscribe to the Ignite's user list. Refer to this page for details - https://ignite.apache.org/community/resources.html#ask
See my answers inline. zhaojun08 wrote > HI ALL, > > I am new to ignite, and I have a few questions to confirm. > > 1. I want to use ignite to store RDBMS in MEM. Table in RDBMS have many > rows, does ignite store every row as a Java object, like the "Person" > object in docs? And is it the only way to store a row in Ignite? / > Yes, Apache Ignite is an in-memory key-value store meaning that for every > key there should be a corresponding value. A key-value tuple will > correspond to a row from your RDBMS store. / > > 2. I notice that "Person" class implements Serializable, does it mean > every row record stores in ignite in Serialization format? If so, will the > Serialization degrade the select performance, and the reason for > Serialization? / > Objects are stored in a serialized form in memory. However it doesn't mean > that JDK serialization techniques are used to prepare an object for > storage. In fact Ignite uses its own BinaryMarshaller (serializer) that > has good performance characteristics - > https://apacheignite.readme.io/docs/binary-marshaller / > > 3. I have store RDBMS in Ignite, can I update specific row record using > UPDATE/DELETE sql statement to alter the table? / > This kind of queries is not supported right know. You have to update > caches with methods like cache.put, cache.putAll, cache.invoke, etc. / > / > If you need to pre-load data from RDBMS then you can rely on one of the > pre-loading strategies - https://apacheignite.readme.io/docs/data-loading. > This topic should be useful for you as well - > https://apacheignite.readme.io/docs/persistent-store / > > -- > Denis > > Many Thanks! -- View this message in context: http://apache-ignite-users.70518.x6.nabble.com/Does-ignite-support-UPDATE-DELETE-sql-tp6290p6292.html Sent from the Apache Ignite Users mailing list archive at Nabble.com.
