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This article mainly explains "how to realize the index shard calculation of RGW". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to realize the index shard calculation of RGW".

Each Object stored in rados in RGW needs to first calculate the shard number of the corresponding metadata storage, and then update the metadata information to the corresponding Object of shard number. The code is as follows

Int RGWRados::get_bucket_index_object (const string& bucket_oid_base, const string& obj_key, uint32_t num_shards, RGWBucketInfo::BIShardsHashType hash_type, string * bucket_obj, int * shard_id) {int r = 0; switch (hash_type) {case RGWBucketInfo::MOD: if (! num_shards) {/ / By default with no sharding, we use the bucket oid as itself (* bucket_obj) = bucket_oid_base If (shard_id) {* shard_id =-1;}} else {

Uint32_t sid = ceph_str_hash_linux (obj_key.c_str (), obj_key.size ()); uint32_t sid2 = sid ^ ((sid & 0xFF))

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