An Isilon cluster has ten A200 nodes and the node pool data protection level is set to N+2. The data access pattern is currently set to streaming. If the data access pattern is changed to concurrency, how many stripes for a 1 MB file are moved to the other drive(s)?
Changing the data access pattern from streaming to concurrency does not affect the physical placement of data stripes in an Isilon cluster. In this scenario, the N+2 protection level remains the same and no stripes need to be moved, since the data is already evenly distributed across the nodes. Therefore, the number of stripes moved to other drives for a 1 MB file is 0.
N+2 implies 10+2 strip units, with one drive per node. Since the policy is set to streaming it means 2 nodes use 2 drives instead of 1. Concurrency demands that all units be placed on the same drives, thus 2 units are moved.
Nevermind, it´s a 1mb file = 8+2. No units are moved since it already is 1 drive per node.
so it is 0 ?