1438419
doi
10.5281/zenodo.1438419
oai:zenodo.org:1438419
user-cernopenlab
Optimization of Data Transfer for 100 Gb/s Ethernet
Galli, Massimiliano
CERN openlab summer student
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
CERN openlab, summer student programme
summer-student programme
<p>In 2019 the LHCb experiment will go through an important upgrade, that will improve performance in many fields. One oh these fields is the DAQ system: it consists of a big flow of data that comes from the network and reaches a set of disks, where data are stored. This flow of data needs to be placed on the hardware in order to optimize the performance: high bandwidth and low CPU utilization are two key ingredients to achieve this goal. The first part of this project is about this: we realize a very basic test setup, consisting of two servers connected through a 100 Gbit/s Ethernet Interface and we optimize the data transfer in terms of bandwidth and CPU utilization.<br>
In the second part a set of disks is connected to one of the two servers, in order to simulate a typical storage system. After optimizing the data transfer, a series of measurements of bandwidth as a function of the packet size is performed: the reason for this is to study the behaviour of the Data Direct Input/Output (DDIO) technology, that allows data packets of certain sizes to go directly from network to L3 cache, without touching the main memory; this should, in principle, enhance the performance in some cases.</p>
Zenodo
2018-09-28
info:eu-repo/semantics/report
1438418
user-cernopenlab
1689326537.376599
451466
md5:0922a92f60d676876dab1fbb7c4d1f02
https://zenodo.org/records/1438419/files/Report_Massimiliano Galli.pdf
public
10.5281/zenodo.1438418
isVersionOf
doi