Merge two collections
Nobody has claimed this yet.
- Dominant language
- Java
- Stars
- 5.1k
- Forks
- 877
- PR merge metrics
- No merged PRs in 30d
Description
Hi!
I have two big collections of data(none of them fits in memory, for example i have 8 gb ram and each of collections have size 16gb), and i would like to do something like join of two this collections.
One of the best way, i think, is contain data in collections in sorted order(or doing this in buckets with same hash function for building buckets) and doing join for a linear time.
is mapdb fitted for this operation? Is it good idea to use mapdb for it?
I have checked this solution on postgres and it worked very-very long.
PS Sorry for my english, i am not native speaker.
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
The issue names no files, tests, or entry points. Start by reviewing MapDB's disk-backed collection APIs and how they handle collections larger than memory; done would require a documented supported approach for joining two 16 GB collections or a clarified implementation request.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- databases
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 20/100