'Concurrent updates' presentation slideshows

GPFS: A Shared-Disk File System for Large Computing Clusters

GPFS: A Shared-Disk File System for Large Computing Clusters. Frank Schmuck & Roger Haskin IBM Almaden Research Center. Introduction. Machines are getting more powerful But, we always can find bigger problems to solve Faster networks ? machines can form clusters

470 views • 31 slides

Building MapServer Applications with PostGIS

Building MapServer Applications with PostGIS. Chris Hodgson & Paul Ramsey Refractions Research. What is PostGIS?. Spatial Objects for PostgreSQL Store, Query, and Manipulate Spatial data objects as first-class citizens in the Database Follows the OGC Simple Features for SQL

615 views • 28 slides

349 views • 23 slides

What is OceanStore?

What is OceanStore?. Worldwide infrastructure to give access to persistent data Assumptions Always online, fast connections (not a demand) The network is untrusted (malicious hosts) Hosts / routers can fail arbitrarily Hosts constantly entering / leaving.

280 views • 15 slides

Chapter 15 Lock Contention

Chapter 15 Lock Contention. Lock Types and Modes. Lock types specified with two characters Can be found in V$LOCK_TYPE Nearly 200 lock types Most common are TM (DML) TX (transaction) Locks can be seen in V$LOCK. Lock Types and Modes (cont.). Lock modes Shared row Exclusive row

333 views • 12 slides