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Can read-only scale-out be added to an old-school HA setup?

2

A production SQL Anywhere 12 High Availability exists using the old-school command line methods:

   dbsrv12 ... -xp partner=(eng=xxx;links=tcpip(host=192.168.0.20; ...

Can the new CREATE MIRROR SERVER and SET MIRROR OPTION statements be added to this setup to implement a read-only scale-out copy node?

Or does the existing High Availability setup have to be changed to use the new-school CREATE MIRROR SERVER methods?

asked 06 Jan '15, 14:52

Breck%20Carter's gravatar image

Breck Carter
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edited 06 Jan '15, 14:53

One Answer:
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3

No, you cannot use -xp specified partners with copy nodes.

What you need to do is:

  1. add CREATE MIRROR SERVER definitions for the partners, primary and arbiter
  2. set any mirror options with the SET MIRROR OPTION statements
  3. restart the partner servers with just -xp on
  4. add the copy nodes

Note that mixing CREATE MIRROR SERVER definitions with old (deprecated) -xp key=value;... definitions can lead to unexpected behavior so they should not be mixed.

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answered 06 Jan '15, 15:50

Ian%20McHardy's gravatar image

Ian McHardy
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accept rate: 40%

edited 06 Jan '15, 15:52

...and the short answer is, "do not be an early adopter"... sigh :)

(06 Jan '15, 16:05) Breck Carter
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question asked: 06 Jan '15, 14:52

question was seen: 1,569 times

last updated: 06 Jan '15, 16:52

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