Resource management system for distributed environment B4. Nguyen Tuan Duc.

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Presentation transcript:

Resource management system for distributed environment B4. Nguyen Tuan Duc

Background Emerging need for resource management system of clusters / grids Several systems exist, but have problems…  Portable Batch System  Sun Grid Engine  ….

Goal Flexible resource management system  Support clusters, grids  Fair-share scheduling  Maximize utilization of resources  Support parallel applications  Reduce load aggregation

Agenda Background Goal Related works Proposal method Problems

Related works Portable Batch System (MRJ 1990s)  Batch queuing system  Automatic load-balancing  Parallel jobs support  Job accounting

Portable Batch System (PBS)

Sun Grid Engine Batch queuing system by Sun Microsystems Same features with PBS, and Job checkpoint Several add-ons

Problems of batch queuing systems Resource utilization Load aggregation  Server accept too many requests from clients Limit of execution model  Cannot fork, since process created with fork() does not go into the queue …

Saito Dai ’ s system (STDS) Flexible Resource Management System for Widely Distributed Environment (2006)  No load aggregation  Job scheduling on each node  Independent from execution model (fork, … OK)  Support parallel jobs

STDS structure Two main components  Node searching system (graph searching)  Scheduler (on each node) Scheduler  Daemon on each node  CPU fair-sharing by ‘nice’ Node searching system  Create graph from links  Node search  graph search

STD node searching system

Our approach Similar to STD system  Node searching system  Scheduler on each node But different in …  Node search: no graph searching  Scheduler: kernel scheduler with user accounting (budget scheduler)

Scheduler: Budget scheduling Budget scheduling Normal queue & budget queue Normal queue for interactive processes  Linux 2.6 default scheduler Budget queue for CPU-hogging processes  Automatic detecting of CPU-intensive process tokyo.ac.jp/~duc/pre/1107.ppt tokyo.ac.jp/~duc/pre/1107.ppt

Node searching system Client-server model  Daemon on each node  Daemon reports CPU state (process number, CPU utilization, …) directly to user Reports maximum price  From where user can submit jobs? From every where on the cluster, grids From their desktop, via the Internet  Need of a job submitting system

Node searching system (NSS) User

Who will determine nodes? User! Users choose nodes appropriated to their jobs  Parallel jobs: idle CPUs or CPUs with low-price jobs  Long-last jobs: idle CPU, set low-price

Node searching system (NSS) NSS should report to users:  CPU utilization  Maximum price  Load (process number,..)  … Daemon on each node sends information about the node to client. Client is on user’s machine  No heavy load aggregation

Problems!!! May be heavy load on user client NAT, Firewall  How client can connect to server?? Information need?  Only CPU utilization, maximum price, load, average-price?