Note
This documentation is for the new OMERO 5.2 version. See the latest OMERO 5.1.x version or the previous versions page to find documentation for the OMERO version you are using if you have not upgraded yet.
The system requirements for OMERO.server vary greatly depending on image size and number of users. At a minimum we suggest:
The recommended OMERO.server specification we suggest for between 25-50 users is:
Hard drive space should be proportional to the image sizes expected. The drive space should permit proper locking, which is often not the case with remotely mounted shares. See the Unix and Windows binary repository sections for more information.
RAM is not going to scale linearly, particularly with the way the JVM works. You are probably going to hit a hard ceiling between 4 and 6GB for JVM size (there is really not much point in having it larger anyway). With a large database and aggressive PostgreSQL caching your RAM usage could be larger. Still, even for a large deployment, it is not cost effective to use more than a few GBs of RAM for this purpose. Performance and monitoring provides information about fine-tuning the server processes’ memory usage. In summary, depending on hardware layout 16, 24 or 32GB of RAM would be ideal for your OMERO server. If you have a separate database server more than 16GB of RAM may not be of much benefit to you at all.
CPU is not something that an OMERO system is usually ever limited by. However, when it is limited, it is almost always limited by GHz and not by the CPU count. So you are not going to get a huge OMERO performance increase by, for example, throwing 24 cores at the problem. In summary, depending on hardware layout 2 × 4, 2 × 6 system core count should be more than enough.
Example production server set-ups provides details on some production set-ups currently in use by OMERO admins, along with how many users and the amount of data they support, which you may find helpful.
The recommended client specification is:
Large imports may require 4GB RAM.
When performing some operations the clients make use of temporary file storage and log directories. The table below indicates the default values for each directory and the environment variables for overriding their locations:
| Client directory | Environment variable | Default location (UNIX) | Default location (Windows) |
|---|---|---|---|
| OMERO user directory | OMERO_USERDIR | $HOME/omero | %HOMEPATH%\omero |
| Temporary files | OMERO_TMPDIR | $HOME/omero/tmp | %HOMEPATH%\omero\tmp |
| Local sessions | OMERO_SESSIONDIR | $HOME/omero/sessions | %HOMEPATH%\omero\sessions |
| Log files | $HOME/omero/log | %HOMEPATH%\omero\log |
Note that setting OMERO_USERDIR will also change the default location for the temporary files and the local sessions.
If your home directory is stored on a network, possibly NFS mounted (or similar), then these temporary files are being written and read over the network. This can slow access down.
See also
Each component of the OMERO platform has a separate set of prerequisites. Where possible, we provide tips on getting started with each of these technologies, but we can only provide free support within limits.
| Package | OMERO.server | Java | Python | Ice | PostgreSQL |
|---|---|---|---|---|---|
| OMERO.importer | Required | Required | |||
| OMERO.insight | Required | Required | |||
| OMERO.server | Required | Required | Required | Required | |
| OMERO.web | Required | Required | Required | ||
| OMERO.py | Required for some functionality | Required | Required | ||
| OMERO.cpp | Required for some functionality | Required |
For full details on which versions of these are supported for OMERO 5.2 and how we intend to update these going forward, see the Version requirements section.