Hi everyone, i'm proceeding reading source code of crush i'm reading src/crush/mapper.c which is describing the core implementation of crush alg. in reading function bucket_straw_choose, i compare the implementation with the idea written in the thesis and have some problem understanding it. in the thesis, it said that the length of straw should multiply the weight of bucket item so that heavier items are more likely to be selected. in bucket_straw_choose, i see bucket->straws multiplying the hash value only. next, i referred to crush.h to take a look at the data structure of crush_bucket_straw, and found two members named 'straws' and 'item_weights'. i just don't know whether 'weight' and 'straw' in the implementation mean the same thing as in thesis. if so, why item_weights is not used in bucket_straw_choose. Thanks. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
