Credit System

  1. Academic users are granted with 300,000 credits while registration, non-academic get 10,000.
  2. The credit charge will be withdrawn from the account of the users when executing projects.
  3. In case your project needs more credits than available in your account, the project can not be executed.
  4. Every 7 days 50,000 credits will be automatically added to your account with an upper limit of 300,000 credits.
  5. Sharing projects with "write" access gives other users the ability to execute the project with their credits.
  6. In case your project exceeds the amounts of credits in your account you have to wait until more credits have accumulated.
  7. In case the you need more than 300,000 credits to execute your project, please send an e-mail to with a short explanation. We will then try to schedule your project as soon as compute time is available.

Project Execution

Executing an project will lock the project and queue it in the SILVA execution process.

The execution time of projects depends on the amount of sequence data, the type of sequence data, the workload of our clusters and the general SILVA NGS service utilization.

You and all users the project is shared with are notified by email when the execution has finished.

Request Project Execution

The project will not be charged to your account. Scheduling will be done based on the availability of compute time. Please be aware that it can take several days until your project is processed. We reserve the right to deny the execution of large-scale projects.

Project Sharing

Every project can be shared by the creator (owner) with other registered users. In the project permission view the email of the user the project should be shared with, has to be added. There is no proof that the email is correct or does already exist in the SILVAngs system. No notification is send.

All projects that are shared with you are listed on the "Shared Project" page.

The permission “readonly” makes other users able to see your sequence data, parameters and results. Also, “readonly” granted users can download the sequence data of your project.

The permission “write” allows other users to upload additional data, change project parameters and finally execute projects by using their credits (see credits system).

Sequence Data

The first thing to do after creating a project is uploading sequence data. The only sequence data format we currently support is uncompressed or gzip compressed FASTA DNA.

For every sequence you upload a unique ID is generated using all characters between the ">" and the first occurring white space character (space, tab, or new line). 

The ID of the following example FASTA header is 'AC34325':

>AC34324 Bacteris

This identifier has to be unique across all files uploaded into a project! Also, this id must be shorter than 70 characters.

The uploader supports multiple file uploads, so not only one file can be selected in the upload view (SHIFT is the default multi selection key).

The upload widget at the bottom of the navigation bar can be extended with a click. The extendend version displays an overview of all files that were chosen for upload and their current status. Using the detail button shows enhanced information about the upload.

Failed uploads can have the following reasons:

Another file with the same name already exists in the project.

The file was not an valid FASTA file. Click the detail button to see detailed error messages.

The connection failed. Try splitting your files into smaller ones.

Generally we experienced problems with uploads larger than 500 MB (per upload not per file). As for now there is no solution for this.

you have to keep the credit system in mind, additional sequence files raise the credit charge of an project. The credit charge of an sequence file is calculated by the total number of bases divided by 1.000.