workshophaser.blogg.se - Sybase powerdesigner 11.0

#SYBASE POWERDESIGNER 11.0 SERIES#
#SYBASE POWERDESIGNER 11.0 DOWNLOAD#

(…more than your father’s Replication Server Manager) (os/database monitoring, instance provisioning) (new commands/functionality, enhanced automation) The tested Always-On bundle consisted of the following products: SAP Adaptive Server Enterprise (ASE) In a properly configured HA environment, users will not experience a degradation of throughput. Through the use of a robust network combined with fast disk devices synchronous replication works well and it guarantees zero data loss (ZDL). You may think, “synchronous replication no way, my users will be sitting around waiting for the keyboard to unlock!.” However, you may be surprised.

#SYBASE POWERDESIGNER 11.0 SERIES#

I recently downloaded, installed, and conducted a series of comprehensive tests to help me understand Always-On. The HA option is made possible through the use of synchronous replication. Each node maintains its own resources and shares nothing. Cluster configurations normally imply shared resources however, there are no shared resources here.

The environment uses cluster configurations.

Once the promotion is complete, clients can reconnect to the new primary server and see all committed data including data that was committed on the previous primary server.

If the Fault Manager (FM) detects that a primary server has failed, a companion server is promoted to the role of primary server either manually or automatically.

The system takes user specified data and replicates it through an RS from the primary server to the companion server.

If the Fault Manager (FM) detects that a primary server has failed, a companion server is promoted to the role of.

Its function is to monitor components availability and invoke a switch of the primary and companion sites.

The FM is installed and runs from a host machine completely separate from the primary and companion components.

These agents facilitate inter-host communication for multiple components.

One Host Agent runs on the primary site host and another at the companion site host.

Companion RS – The companion RS remains up, available, and unused until replication between the primary and companion sites is switched.

Primary RS - The primary RS operates from the companion host site.

Companion ASE Server - The primary server has a companion server (referred to as a "standby server" in DR mode, and as a "companion" in HA mode), and contains copies of designated databases from the primary server.

Primary ASE Server – The primary server is where all transaction processing takes place.

Think of the Always-On feature as a high-availability and disaster recovery (HADR) solution that, currently, consists of two SAP ASE servers, two SAP Replication Servers (RS), two SAP Host Agents, and a Fault Manager (FM) to monitor and control component failure switching.Ĭomponent Configuration Two SAP ASE Servers and Replication Servers Please note: The information contained in the technical document pertains only to the High Availability configuration, operation, and administration of SAP’s Always-On HADR feature.

#SYBASE POWERDESIGNER 11.0 DOWNLOAD#

You can download the SAP ASE Always-On White Paper. Here is a high-level summary of what it contains.

We want you to know what’s in our paper before you download it. Our team of experts has worked diligently to put together all of the technical details needed to enable you to implement the HADR feature. In the paper, you’ll learn about all the various testing we carried out and the results they yielded.

We have written a detailed technical paper with our findings so that you can gain a better understanding of the feature and how it works. Through the introduction of practical, user-desired features incorporated by SAP, Always-On HADR continues to be a cost-effective, reliable, robust solution for many clients planning or upgrading an OLTP, HA, or DR environment.SAP ASE Always-On HADR option Dobler Consulting has performed extensive evaluation and testing on the SAP Always-On HADR feature.ĭobler Consulting has performed extensive evaluation and testing on the SAP Always-On HADR feature. Now, in the post-Sybase era, the ASE/RS tag team has been given a fresh tank of oxygen and continues to thrive in the marketplace. I’ve been working with these two products for over 20 years from Replication Server 11.0.2 (when I used to pull my hair out) to the most recent 15.7.1 SP305. ASE and Replication Servers still play an integral part in our data services, especially with regard to speed, data integrity, and heterogeneous capability.