Motr Deep Dive Sessions

This page is created for the CORTX Open Source community. The CORTX-Community can join the upcoming training using the provided invite or view the recordings of previously recorded sessions.

Date	Training Agenda	Presenter	Invite	Presentation Link	Recording Link	Comments
04-Feb-2021	Motr Libraries	Nikita		Presentation	MP4	Motr libraris source code / headers
09-Feb-2021	DTM Design: Metadata DTM Data DTM Performance implication Using special hardware to speed-up performance	Anatoliy		Presentation	MP4
16-Feb-2021	State machines, ASTs, and localities	Nikita		Presentation	MP4
18-Feb-2021	RPC and FOPs: Coalescing of RPC request Possible improvements Timeout and error handling Deadlock detection xcode	Madhav		Presentation	MP4
23-Feb-2021	Request handler, and FOM: Queuing of IOs in motr? Adding support to stop processing new IOs and keep adding them to queue. (queue non-volatile?) Types of FOM Read FOM Write FOM CAS FOM etc FOM Scheduling and AST Advantages and disadvantages of AST Possible design alternatives to AST	Madhav and Nikita			MP4	Nikita to provide sessions on: Advantages and disadvantages of AST Possible design alternatives to AST
25-Feb-2021	Transactions: Interface, high-level model of data flows inside BE Why do we need BE	Anatoliy		NA	MP4
11-Mar-2021	Transactions: Write Log Ahead, FOL conceptual view Logging Structure Group and its impact on performance Stob IO performance for transactions and how it can be speed up Use of SSDs for metadata Credit Calculations	Anatoliy		NA	MP4
25-Mar-2021	State machines, asts, fom, practical example of writing and debugging	Ivan A		PDF	MP4
15-Apr-2021	ADDB Tools Practical example of instrumentation Practical usage of ADDB DB Practical data extraction	Maxim Malezhin			MP4
6-May-2021	Balloc: Current Algo Possible new algo and limitations Best choice for our workload	Huanghua and  Shashank			MP4
20-May-2021	Parity declustering	Nikita			MP4
TBD	Layout and Pools Versions: Formulaic Pool Versions Details Switching Policy	Nikita
TBD	Write object flow end-to-end: Code flow and important data structure	Nikita
TBD	Read object flow end-to-end: Code flow and important data structure	Nikita
TBD	Metadata operation flow for following use case: Reads (lookup) Write (lookup and update) DIX PUT DIX GET DIX DELETE	Nikita
TBD	Resource Manager: RM Selection if current one goes down Use case for read and write Resource Locking and failure handling
TBD	Confd: Topology and its mapping with motr data structure How the data structure gets update with HA events Types of external Hare Event Motr process
TBD	Motr Client (Clovis) and its functionality	Madhav
TBD	B-Tree in Motr: Current structure Typical B-Tree node addition, removal and its add operation to transaction Basic B-Tree operation standard can we separate them from motr action and database Can we get rid of volatile files from node? will help in Swap Space Task Credit calculations New B-Tree Design	Nikita
TBD	SNS Repairs: Current Design Data Rebalance Metadata Rebalance Sliding Window Protocol advantage and disadvantage	Nikita
TBD	Debugging tools and techniques	Anatoliy