Hi Ilya,
That documentation I saw, however it seems to describe only using
Cassandra as a Persistant store for Ignite Caches, i.e.
"Ignite Cassandra module implements persistent store for Ignite caches by
utilizing Cassandraas a persistent storage for expired cache records.
It functions pretty much the same way like CacheJdbcBlobStore and
CacheJdbcPojoStoreand provides such benefits:"
It dosn't seem to describe anywhere, how to set it up over an existing
large cassandra table structure to act as a cache and SQL query mechanism
for it. Nor how to deal with the fact you can't have it all in memory
and how Writes and Reads would be handled etc.
Also several of the links on the page are broken.
Ideally want to be able to run ad-hoc SQL queries over the data, including
joins etc. \
I agree there are config examples, AWS etc, but they all seem to me, to
be for persistance of general cache, BLOB or POJO, not for what the
InfoWorld article described.
Unless I'm missing something obvious !.
Regards
Mark.
From: Ilya Kasnacheev <ilya.kasnach...@gmail.com>
To: user@ignite.apache.org,
Date: 08/31/2017 06:56 PM
Subject:Re: Ignite as Cache and Query layer for Cassandra.
Hello Mark,
I have found some documentation on how to do what the article describes:
"Apache Ignite can be inserted between Apache Cassandra and an existing
application layer with no changes to the Cassandra data and only minimal
changes to the application"
https://apacheignite-mix.readme.io/docs/ignite-with-apache-cassandra
On the left you can see there are config examples, tests, AWS
configuration, etc.
Hope it's good enough.
--
Ilya Kasnacheev
2017-08-31 16:15 GMT+03:00 Mark Farnan <mark.far...@petrolink.com>:
Howdy,
I'm currently evaluating Ignite for a project, and am looking for some
guidance and project sample for using Ignite over Cassandra as a cache and
query layer.
Note: The Cassandra database and schema already exists and is mature.
In a Recent Infoworld post, (
https://www.infoworld.com/article/3191895/application-development/light-a-fire-under-cassandra-with-apache-ignite.html
) it stated
"No remodeling of Cassandra data
Apache Ignite reads from Apache Cassandra and other NoSQL databases, so
moving Cassandra data into Ignite requires no data modification. The data
schema can also be migrated directly into Ignite as is. "
However, I can't find in any documentation, or online articles, guidance
on just how to do this and there are no links in the article.
- The Ignite docs /cassandra section appear to only cover using
Cassandra as a persistence layer, not for going over and caching /
querying an existing schema. (unless I'm missing something obvious !)
- The Youtube video cuts out to blank at the end, so no links are shown.
The links on the slideshare document appear to be broken.
- Can't find any git hub for examples on how to do this (especially not
for the couple you tube vids)
Can anyone please point me to some working sample code and/or
documentation on how to do this ?
I'm especially interested in not having to migrate any schema's, nor
having to pre-load the data into the cache. (lazy load), which the
articles imply.
Also some of the data would be too large to load it all into Ram anyway.
Any assistance greatly appreciated.
Regards
Mark.
