On Friday, October 30, 2015, mad Engineer <themadengin...@gmail.com> wrote:
> i am learning ceph,block storage and read that each object size is 4 Mb.I > am not clear about the concepts of object storage still what will happen if > the actual size of data written to block is less than 4 Mb lets say 1 > Mb.Will it still create object with 4 mb size and keep the rest of the > space free and unusable? > No, it will only take up as much space as you write (plus some metadata). Although I think RBD passes down io hints suggesting the object's final size will be 4MB so that the underlying storage (eg xfs) can prevent fragmentation. -Greg
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