RDS and Oracle 10g RAC Update Paul Tsien, Oracle

2 Agenda  Oracle Database10g RAC  What is RDS (Reliable Datagram Sockets)?  Open Source RDS for Linux  Beta Customer Experience

3 Oracle Database 10g RAC  Oracle Database 10g Real Application Clusters (RAC) provides the ability to build an application platform from multiple systems that are clustered together  Allows applications to become  Highly scaleable  Highly available  Chosen to avoid a single node failure, causing application downtime  Eliminates a node as single point of failure Shared Database OracleInstance OracleInstance OracleInstance

4 Oracle Database 10g RAC  World’s best Scalability with Cache Fusion  Cache-to-cache data shipping  Scales off-the-shelf applications with no changes  World’s best Availability with Fast- Start Fault Recovery  Node failure is transparent to applications  Recovers from node failure in 17 seconds - workload independent  Pre-warmed cache speeds restart  Easily add and delete nodes Shared Cache Cache Fusion Users The Ultimate Parallel Architecture

5 Oracle Database 10g RAC  Existing Apps  Financials, MFG, HR and CRM  Collaboration Suite  In house developed  DSS  ISV Apps  Easy Migration  Improve Utilization ERPCRMDW Real Applications in a Real Grid!

6 Oracle Database 10g RAC  RAC IPC  Thousands of processes  200K+ associations (not connections)  64 nodes  Oracle IPC Usage  New database functionality will significantly increase IPC utilization  Approach database I/O rates  Very large messages (8 MB +)

7 What is RDS?  Vision  A low overhead, low latency, high bandwidth, ultra reliable, supportable, IPC protocol and transport system  Which matches Oracles existing IPC models for RAC communication  Optimized for transfers from 200 bytes to 8meg

8 What is RDS?  Goal and Objective  Support for a reliable datagram IPC in OpenIB  Based on Socket API  Minimal code change / testing for Oracle  Failover inter HCA and intra HCA ports  Runs over IB, Ether, iWARP, etc  2-6 month validation / certification for RAC

9 What is RDS?  Reliable Datagram IPC  UDP – Oracle adds reliable delivery via user mode wire protocol engine  Two sockets per process, thousands of messages on wire  Slow sends times (windowing,acks,retrans)  Holds together but degenerates under CPU load  Well tested !

10 What is RDS?  Available Options  uDAPL / itAPI – not supporting  IPOIB – high CPU overhead, same unreliable delivery (UDP)  SDP – connection oriented  We want to take our existing well tested UDP module, shutoff most of it to run over an O/S provided RD IPC

11 What is RDS?  RD – Reliable Datagram IPC over IB  50% less CPU than IPOIB, UDP  ½ Latency of UDP (no user-mode acks)  Within 5% of uDAPL thru-put using Oracle  Minimal code change – reduced our UDP module by 70% - removed windowing, acks, retransmissions, etc.  RDS driver ~ = 1k C lines (b-copy)  Decoupled from user-mode CPU loading  Passes all Oracle regression tests in < 2 wks !!!!  Supports fail-over across and within HCAs

12 What is RDS?  RDS IPC over IB  Uses IB reliable connection (RC)  Node to Node level connection  User mode sockets share small pool of node to node RCs.  Formed either dynamically at send or at system startup

13 Oracle Block Service Rate

14 Service Response Time

15 CPU Cost Per Block Served

16 Open Source RDS for Linux  Open Source RDS  Oracle is building Open Source RDS for Linux  Oracle will support RDS on Linux  Oracle RDS will be pulled into OFED  Oracle RDS will support GigE, simple NICs and RDMA NICs (IB/iWARP)

17 Open Source RDS for Linux  Status  Oracle is testing Open Source RDS on GigE  RDS on IB is in development  Beta testing with customers using SilverStorm RDS/IB stack  Very stable  Very good performance  RDS is supported by major tier one system vendors

18 Open Source RDS for Linux

19 Beta Customer Experience  Customer Requirements  Improve application performance (throughput, latency, etc.)  Maintain data availability  Lower TCO through commodity hardware without sacrificing performance or scalability  Want to implement Grid and Utility computing

20 Beta Customer Experience  Results  RDS/IB shows significant real world application performance gains for certain workloads: DSS and mixed DSS/OLTP workloads  Throughput and latency  Customers are interested in unified fabric for cost and manageability reasons  Reservation/QoS is a concern  Joint customer Oracle World presentation on RDS (Session S281216, 10/23/ AM)