cluster ROIConsolidate workloads

• Wide variety

Workload Heterogeneity in Shared Clusters

•

•

APIs

high cluster utilization

centralized distributed

Resource Management in Shared Clusters

Centralized Resource Management[YARN, Mesos, Omega, Borg]

Node Manager

Node Manager

Node Manager

•

•

Centralized Resource Management[YARN, Mesos, Omega, Borg]

Node Manager

Node Manager

Node Manager

•

•

Centralized Resource Management[YARN, Mesos, Omega, Borg]

Node Manager

Node Manager

Node Manager

1. Request

•

•

Centralized Resource Management[YARN, Mesos, Omega, Borg]

Node Manager

Node Manager

Node Manager

1. Request

2. Allocation

•

•

Centralized Resource Management[YARN, Mesos, Omega, Borg]

Node Manager

Node Manager

Node Manager

1. Request

2. Allocation

3. Start task

•

•

Distributed Resource Management[Apollo, Sparrow]

Node Manager

Node Manager

Node Manager

•

•

Distributed Resource Management[Apollo, Sparrow]

Node Manager

Node Manager

Node Manager

•

•

Distributed Resource Management[Apollo, Sparrow]

Node Manager

Node Manager

Node Manager

•

•

Distributed Resource Management[Apollo, Sparrow]

Node Manager

Node Manager

Node Manager

•

•

Centralized vs. Distributed Scheduling

Centralized Distributed

Workload heterogeneity

Task placement

Enforcing scheduling

invariants

Allocation latency

Slot utilization

Scalability

• “Trade performance guarantees for allocation latency”

choose among scheduling typesBased on job type, job characteristics, cluster load, etc.

Mercury provides a programmatic way to use otherwise idle resources

Mercury: Key Insight

• “Trade performance guarantees for allocation latency”

choose among scheduling typesBased on job type, job characteristics, cluster load, etc.

Mercury provides a programmatic way to use otherwise idle resources

Mercury: Key Insight

Gains over YARN:

Up to 40% task throughput

Up to 66% mean job latency

Mercury Architecture (Conceptual)

Mercury Runtime

Mercury Runtime

Mercury Runtime

Mercury Resource Management Framework•

•

•

•

Mercury Architecture (Conceptual)

Mercury Runtime

Mercury Runtime

Mercury Runtime

Mercury Resource Management Framework•

•

•

•

Mercury Architecture (Conceptual)

Mercury Runtime

Mercury Runtime

Mercury Runtime

Mercury Resource Management Framework•

•

•

•

resource type

Mercury Architecture (Conceptual)

Mercury Runtime

Mercury Runtime

Mercury Runtime

Mercury Resource Management Framework•

•

•

•

resource type

Container Types

GUARANTEED containers

•

•

QUEUEABLE containers

• opportunistically

•

•

•

Container Types

GUARANTEED containers

•

•

QUEUEABLE containers

• opportunistically

•

•

•

•

central

•

distributed

Use of Container Types in DAGs: Examples

•

•

•

• LocalRM

• Queuing

• Framework

• Application

Mercury Architecture over YARN

GUARANTEED Request and Allocation

GUARANTEED Request and Allocation

GUARANTEED Request and Allocation

request(GUARANTEED, …)

GUARANTEED Request and Allocation

request(GUARANTEED, …)

allocate(…)

GUARANTEED Request and Allocation

request(GUARANTEED, …)

allocate(…)

GUARANTEED Request and Allocation

start(GUARANTEED, …)

request(GUARANTEED, …)

allocate(…)

QUEUEABLE Request and Allocation

QUEUEABLE Request and Allocation

QUEUEABLE Request and Allocation

request(QUEUEABLE, …)

QUEUEABLE Request and Allocation

request(QUEUEABLE, …)allocate(…)

QUEUEABLE Request and Allocation

start(QUEUEABLE, …)

request(QUEUEABLE, …)allocate(…)

Task Execution: Conflict Resolutiontwo priorities

types of schedulers shared resources

Application Policies

•

• container type to be requested for each task

•

•

Framework Policies

•

•

•

rebalance

reorderingjob arrival time

QUEUEABLE containers per node

Load Shaping Policies

Mercury Runtime

Mercury Runtime

Mercury Runtime

Experimental Setup

•

•

•

•

•

Task Throughput for Increasing Task Duration

•

•

Cosmos-based Workload: Task Throughput

•

Cosmos-based Workload: Job Latency

•

•

Application Engines

M/R AM REEFTezSpark Runtime

Cluster-wide resource management: YARN++

YARN + Federation

YARN + Rayon

YARN + Mercury

YARN + Mercury

YARN + Mercury YARN + Mercury YARN + Mercury

Per-job/framework Resource Management

Hive …Storm Giraph PigSpark

The Bigger Picture

•

•

•

Conclusion