Azure Mapper vs. Graph DB vs. RDBMS

文章目录[隐藏]

The motivation dataset

	Azure Mapper	Graph DBs	RDBMS
Pros	Parallel Computing Recursive Ptr Deref	Chase edges across servers Various neighborhood queries	Extended buffer pool Semantic cache Temporary-data store
Benefit by	Avoiding strictly serializing the roud tip RPC	Avoiding strictly serialized full round trip RPC overheads	Index lookups Predicates on MVs

`Sproc`	CompuCache
An application specifies a `sproc` by calling the `Register` function and executes it by calling the `Execute` function.	CompuCache uses `eRPC`, a user-space RPC library that runs on DPDK or RDMA.
Sproc code is a parameter to Register and is broadcast to all CompuCache servers.	DPDK avoids OS kernel overhead by executing the networking in user space.
On each server, the code is compiled locally as a dynamic library and loaded into the runtime of the server.	RDMA offers the further benefit of offloading the CPU by running most of the networking protocol on the network interface card (NIC).
A CompuCache server might not have all the data needed to execute a sproc, which requires coordination with other CompuCache servers	To leverage the full bandwidth of high-speed networks, CompuCache batches small operations in a single network transfer. This includes batching small I/O requests and responses and all `sproc` execution requests.

We have server-side Pointer Chasing by LocalTranslator Data Structure provides Translate.

An sproc invokes this function to map virtual cache addresses into physical server locations.

Cross-Server Pointer Chasing Handling OOB exceptions.

Highly correlated with far memory setup. and type 3 can be used for better memory access, without the need of using ptr chasing to leverage the info of far memory.
Can also leverage the Near data processing for memory node in a memory polling setup.