Storage Management TEG: Questionnaire Level 1 - Stefan Roiser

This twiki is to collect the input of Stefan Roiser. Please answer the questions below. For more information, please refer to the Storage TEG main twiki.

Question 1

- In your view, what are the 3 main current issues in Storage Management (SM)?

• In case of jobs accessing data via protocol from the tape disk caches (not downloading to the WN) LHCb is observing problems with Disk I/O from the servers. The solution so far was to increase the number of nodes which provides much more space to the caches that are necessary.

Put here your answer

Question 2

- What is the greatest future challenge which would greatly impact the SM sector?

My answer:

Question 3

- What is your site/experiment/middleware currently working on in SM?

My answer:

• Consistency checks between LFC and storage (Elisa can provide more info on this).

Question 4

- What are the big developments that you would like to see from your site/experiment/storage system in the next 5 years?

My answer:

• Some kind of flexibility of moving space tokens around would be useful. E.g. in case of reprocessing activities one would like to use as much as could be for staging RAW (and SDST/AOD) files, which is usually the bottleneck for these kind of activities. While under normal operations the sizes of this caches could be much smaller.

Question 5

- In your experience and area of competence, what are the (up to) 3 main successes in SM so far?

My answer:

Put here your answer

Question 6

- In your experience and area of competence, what are the (up to) 3 main failures or things you would like to see changed in SM so far?

My answer:

Put here your answer

That's it!

Thanks! Feel free to edit again at any time, until the date of the kick-off meeting.

-- DanieleBonacorsi - November 2011