domsj/orocksdb

An OCaml RocksDb binding using ocaml-ctypes

ORocksDb

This repository contains some ocaml bindings to the C api of rocksdb. It is most certainly not complete. Not all available/implemented options have been tested. Additions and fixes are always welcome.

The binding is used as part of https://github.com/openvstorage/alba.

In case this library is not sufficient for your needs, then feel free to extend it, or to have a look at one of the alternatives: https://github.com/ahrefs/ocaml-ahrocksdb and https://github.com/chetmurthy/ocaml-rocksdb.

orocksdb's Issues

OPAM package should be updated

Commit 3ea7b69 added some files to an orocksdb installation.

The published OPAM package hasn't been updated to incorporate this change.

Can a new OPAM package be created so these changes are available via OPAM?

switch from ocamlbuild to oasis?

Hi, I noticed you're using ocamlbuild. I wondered if you'd be open to switching to oasis. I think I can reproduce the function of storing the git version in a file for the build, and don't see anything else that seems problematic in your myocamlbuild.ml file?

If you're OK with this, I can send you a PR.

Unable to run orocksdb

Hi guys!

I am new to ocaml and I wanted to run an application using orocksdb. I installed rocksdb with the script from the repo. After that I ran make build make install in orocksdb and everything was fine.
My project compiled too, but when I wanted to start it, I got the following error message:

Fatal error: exception Dl.DL_error("./main: undefined symbol: rocksdb_cache_create_lru")
Raised at file "src/ctypes-foreign-base/dl.ml", line 42, characters 20-44
Called from file "src/ctypes-foreign-base/ctypes_foreign_basis.ml", line 47, characters 19-47
Re-raised at file "src/ctypes-foreign-base/ctypes_foreign_basis.ml", line 49, characters 50-59
Called from file "rocks_options.ml", line 14, characters 6-94

I think, for some reason it is unable to find the required .so files

It is probably me, who messed up something, but couldn't find help yet. I hope it's ok, to ask here :)

OS: Ubuntu 16.04
Ocaml 4.06.0

Hacking together an ocaml-rocksdb interface based on the C++ API

Hi, I've been using orocksdb for a while, and needed access to more of the functions. In this case, specifically access to column-families, but I anticipate needing access to a lot more. Ctypes was ... looking daunting, and esp. b/c the RocksDB C API calls for the stuff i wanted to access involved a lot of memory-management. Seemed painful. But on the other hand, the C++ APIs were very clean, b/c they were done in the Google C++ style, and using STL containers. To make a long story short, I decided to write an "IDL compiler" against the C++ API, and it seems to have worked out really nicely.

https://github.com/chetmurthy/ocaml-cppffigen
https://github.com/chetmurthy/ocaml-rocksdb

I thought I'd show it to you because you might find it something you wish to adopt. Obviously I can completely understand why you might want to continue on the path you've already chosen, but I figured, it would only be collegial/friendly/polite to ask.

Please feel free to contact me at chetsky at gmail dot com if you'd like to discuss privately.

And of course, if you're at all interested in this tool, I'm happy to discuss changes you think would be useful.

Installing on Mac OS

Is there a fundamental reason this package requires linux? Or is it/could it be possible to provide Mac OS support?

Cannot pass in Core.Bigstring for Rocks.Bigstring becuase rocks_intf.cmi is not installed and it's interface is assumed to be opaque

beef up unit-tests, add more function

I'd like to beef up the unit-tests, add support to orocksdb for things like snapshots, etc. Is this something you'd like to merge into your repo, or should I fork?

Also, thank you for doing this work -- it's very nice. I would have used camlidl, and that would have been interminable.