I would like to try implementing read-through = true and write-through = false cache. My application will read objects from cache and perform creates and updates directly to 3rd-party database (oracle).
How to tell Apache Ignite that I had updated object in Oracle?
You can remove an entry from the cache, using IgniteCache#remove, for example. It will be reloaded from the DB during next access.
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I am using AbstractRoutingDataSource to store data sources which are stored in database during spring boot application startup.
System can switch to correct database during program running.
When end users manual change database connection information from UI (like change password every 6 months), then sysem need to reload data sources information.
According to testing, even sytem reset target data sources, the old jdbc connection is used.
I want to have a file based SQL Database for my Spring Boot application that does not need a dedicated database server and works out of the box, something like HSQLDB or H2.
Additionally I want that database to primarily work on the file system and limit its memory usage. Yet whether I use HSQLDB or H2, changes are only saved to disk on shutdown and memory usage explodes.
I'd like to immediately save all changes to my database to disk and not keep all of it in memory all the time.
My Spring Boot datasource url is currently: jdbc:hsqldb:file:data/xxx.
Am I misunderstanding the capabilities of HSQLDB and H2 or am I missing a configuration setting?
This is configurable
jdbc:hsqldb:file:filename;hsql.default_table_type=cached;hsqldb.cache_size=500;hsqldb.write_delay=false
The settings indicate disk based tables, with 500KB used for memory cache (the actual memory usage is perhaps twice the amount) and immediate writing of changes to disk.
Is there any difference between codeigniter's file cache and database cache?
I'm pertaining to these codes.
$this->cache->file->save()
vs
$this->db->cache_on();
Thanks!
db class caches queries, cache class caches output data
I would like to know if there's a way for ehcache to detect a database update/insert (spring/java, hibernate web application) and refresh its cache with the current(latest) data from the database if not, what would be the best way detect a database update so as to keep the data between and cache and database in sync?
Caching tools (ehcahce , infinispan) provides the solution other way round, i-e, to refresh the cache with DB data in configured interval , for example : every 15 or 30 minutes. Don't use cache, if the data keeps changing continuously...
What is the best way to implement caching layer on an Oracle DB for reads?
So that whenever the db get updated the cache gets too(consistency) and i can query the cache for reads(data),
And is Oracle SCN a good way to determine what changes have been made to the db so that it can be migrated to the cache, and
Apache KAFKA used as the connecting mechanism for data transfer?