sponsored byACMIEEE The International Conference for High Performance 
Computing, Networking, Storage and Analysis
FacebookTwitterGoogle PlusLinkedInYouTubeFlickr

SCHEDULE: NOV 15-20, 2015

When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.

Mantle: A Programmable Metadata Load Balancer for the Ceph File System

SESSION: Scalable Storage Systems


EVENT TAG(S): Storage, Data-Intensive Computing

TIME: 2:00PM - 2:30PM

SESSION CHAIR(S): Gabriel Antoniu

AUTHOR(S):Michael A. Sevilla, Noah Watkins, Carlos Maltzahn, Ike Nassi, Scott A. Brandt, Sage A. Weil, Greg Farnum, Sam Fineberg



Migrating resources is a useful tool for balancing load in a distributed system, but it is difficult to determine when to move resources, where to move resources, and how much of them to move. We look at resource migration for file system metadata and show how CephFS's dynamic subtree partitioning approach can exploit varying degrees of locality and balance because it can partition the namespace into variable sized units. Unfortunately, the current metadata balancer is complicated and difficult to control because it struggles to address many of the general resource migration challenges inherent to the metadata management problem. To help decouple policy from mechanism, we introduce a programmable storage system that lets the designer inject custom balancing logic. We show the flexibility and transparency of this approach by replicating the strategy of a state-of-the-art metadata balancer and conclude by comparing this strategy to other custom balancers on the same system.

Chair/Author Details:

Gabriel Antoniu (Chair) - French Institute for Research in Computer Science and Automation|

Michael A. Sevilla - University of California, Santa Cruz

Noah Watkins - University of California, Santa Cruz

Carlos Maltzahn - University of California, Santa Cruz

Ike Nassi - University of California, Santa Cruz

Scott A. Brandt - University of California, Santa Cruz

Sage A. Weil - Red Hat

Greg Farnum - Red Hat

Sam Fineberg - Hewlett-Packard Development Company, L.P.

Add to iCal  Click here to download .ics calendar file

Add to Outlook  Click here to download .vcs calendar file

Add to Google Calendarss  Click here to add event to your Google Calendar

Paper provided by the ACM Digital Library

Paper also available from IEEE Computer Society