Enqueue only STABLE and LEAK-FREE programs
Majorana is a cluster, neither a backup server nor a working server. Therefore only stable programs without memory leaks can be submitted to it. Valgrind and gdb are your friends. If a process creates troubles, it may be killed at any time without mercy.
Data can be erased at any moment
Data stored in majorana can be erased as a side effect of maintenance or simply because we wake up feeling like doing nasty things, so make sure you always backup your files on a different machine. This is especially true if you fill up all the space of a node or, even worse, majorana itself.
Limits for usage
This are the usage limits for each user has to comply with.
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Concurrent slots per user
Maximum number of slots occupied concurrently per user:
192
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Number of jobs per user
Maximum number of jobs in all queues per user:
3500
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Total number of jobs
Maximum total number of jobs in all queues for all users:
25.000
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Maximum runtime per job
Maximum CPU time per job depends on the queues it’s running in. It can be either
24 or 168 hours
for the short and long/hi_mem queues respectively.
See the list of queue types for further information.