1. Latency of EMIR in Multi-Tier Deployment
Shiraz Memon,
Jülich Supercomputing Center
EGI Technical Forum Prague,

2. TIS Workshop, EMI TF 2012, Prague
Outline
Test Plan
Network Deployment
System Environment
Latency Graphs
20/09/2012
TIS Workshop, EMI TF 2012, Prague

3. TIS Workshop, EMI TF 2012, Prague
Test Plan
Four EMIR nodes, connected to form a four tier hierarchy
Synchronised from single NTP Server
Three tests with number of Registrations: 1K, 10K, 100K
25 Concurrent Clients
Propagate POST event onto the root node
Goal
Latency Measurement of propagation of individual records between tiers
For every registration request ->
Latency = Time of the Request Sent – Current Time
20/09/2012
TIS Workshop, EMI TF 2012, Prague

4. TIS Workshop, EMI TF 2012, Prague
Network Deployment
DSR
emiregistry1.grid.niif.hu
DSR
vm-117.alamo.futuregrid.org
DSR
emiregistry2.grid.niif.hu
DSR
vm-116.alamo.futuregrid.org
25 Concurrent Clients
20/09/2012
TIS Workshop, EMI TF 2012, Prague

5. System Environment Details
vm-116 and vm-117 on FutureGrid
CentOS 5
2 GB RAM
8 GB HDD
JVM Heap Size 1 GB
EMIR v1.2.0, MongoDB
emiregistry1 and emiregistry2 on Hungarian Cloud
SL5.5
497 MB
JVM Heap Size 256 MB
20/09/2012
TIS Workshop, EMI TF 2012, Prague

6. Latency of 1K Registrations
20/09/2012
TIS Workshop, EMI TF 2012, Prague

7. Latency of 10K Registrations
20/09/2012
TIS Workshop, EMI TF 2012, Prague

8. Latency of 100K Registrations
20/09/2012
TIS Workshop, EMI TF 2012, Prague

9. TIS Workshop, EMI TF 2012, Prague
Questions?
20/09/2012
TIS Workshop, EMI TF 2012, Prague