Problem
Why MARS activity is important?
Solution
In MARS activity you can see only the requests that are currently "active" on the Web API level. A "queued" request is not visible in MARS activity.
MARS activity is important for many reasons:- It can give you a good insight of your current request status and of your request details (like Nr of fields, Nr of tapes accessed etc)
- It can give you a very good indication of why your request is slow
- It can provide you a lot of information that you need to improve the efficiency of your request like
- how many tapes your request is accessing (in the MARS log output)
- the reason why a requests is queued.
- other users requests.
Other users requests
Many requests submitted by other users may be running in parallel consuming the services resources (MARS slots, Web-API slots, Tapes access slots etc). These requests may be very useful to understand the efficiency factors.
- Compare the activity of your requests to the other users activity using the MARS activity page.
- See the reason that some requests are "queued" and how long they have been "queued".
- Have a look on the MARS logs about limitations like:
- "In marsod-core, the total number of Requests from ECMWF Web API with 1 tape mount [source] is limited to 6"
- etc