Vitaly Repin wrote:

Hello,

I have a question about usage of the same lmdb database in different containers and in the host machine.

So far I just mapped lmdp file in docker-compose.yml:

volumes:       - "/var/spool/lmdbenv/:/var/spool/lmdbenv/"

And I'm reading/writing to/from the database from different containers.

Everything seems to work at a first glance.

Example of adding an element to lmdb:

/usr/bin/python -mlmdb --env /var/spool/lmdbenv edit \                  --set "client"="{                    "client_ip" : "$client_ip",                    "client_data" : "$client_data"                  }"

Is it the proper use case for lmdb? Is there any special "flush" API which I have to use to make sure that the record inserted in one container becomes visible in another?

LMDB requires every process using it to have a unique PID. Usually containers all run their job as PID number 1, you'll have to make sure they all use unique PIDs.

Thanks in advance!

-- WBR & WBW, Vitaly