SLA target reference

In this section the format of target definitions is specified.

Target restrictions model

Unless otherwise specified, each target type may be expressed as a set of consecutive restrictions:

• total-guaranteed - the guaranteed quantity of a resource to be granted to the user group in total

• total-limit - the limit a resource for the user group in total

• instance-guaranteed- the guaranteed quantity of a resource to be granted to each instance (virtual machine or Docker container in case of compute service type)

• instance-limit - the limit of a resource for each instance

• user-guaranteed - the guaranteed quantity of a resource to be granted to each user

• user-limit - the limit of a resource for each user

If a restriction is not speciffied, we assume following default values:

• total-guaranteed - 0 (no guarantees for group)

• total-limit - inf (no limit for group)

• instance-guaranteed - 0 (no guarantees per instance)

• instance-limit - inf (no limit per instance)

• user-guaranteed - 0 (no guarantees for a user)

• user-limit - inf (no limit for a user)

  Compute service target types reference

Target types conforming to the restrictions model

Type	Unit	Description
computing_time	h	Computing time restrictions in hours
num_cpus	none	CPU number restrictions
mem_size	MB	Operating memory (RAM) size restrictions in megabytes
disk_size	MB	Storage memory size restrictions in megabytes
public_ip	none	Number of IP adresses restrictions
upload_bandwith	Mbps	Upload bandwidth restrictions in megebytes per second
download_bandwith	Mbps	Download bandwidth restrictions in megebytes per second
upload_aggregated	MB	Total uploaded data size restrictions in megabytes
download_aggregated	MB	Total downloaded data size restrictions in megabytes

Target types not conforming to the restrictions model

Type	Unit	Description	Restrictions
costs	EUR	Compute service costs restriction.	limit-total, limit-instance, limit-user
cpu_frequency	?	Restrictions for frequency of virtualized CPU unit	none

Samples

targets: [
    {
      type: computing_time,
      unit: h,
      restrictions: {    
        guaranteed-total: 10, // 10 computing hours is guaranteed to be granted to the user group
        limit-total: 100, // the user group can use up to 100 computing hours
        guaranteed-instance: 2, // 2 computing hours is guaranteed to be granted to each virtual machine or Docker container (instance)
        limit-instance: 100, // each virtual machine or Docker container (instance) can use up to 100 computing hours
        guaranteed-user: 4, // 4 computing hours is guaranteed to be granted to each user belonging to the group (across all instances owned by the user)
        limit-user: 100 // each user in the group can use up to 100 computing hours (in this case each user can use the whole computing time quota of a group)
      }
    },
    {
      type: num_cpus,
      unit: null,
      restrictions: {    
        limit-total: 50, // the user group can use up to 50 cpu units at the same time
        limit-instance: 4, //  a virtual machine/container can use up to 4 cpu units at the same time
        limit-user: 6  // a single user can use up to 6 cpu units at the same time
      }
    }
}