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trunk 27 3

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27 annotated / raw | Diffs: previous, other | Lines: 157 ( +19, -9 )

Created: 2007-07-06 14:27:43 -0500 (10 months ago) | Author: rklahn | Changeset: 27

Fixes BRUCE-1. http://jira.codehaus.org/browse/BRUCE-1

To prevent double posting, a snapshot will now consider the current transaction as
'in-progress'. A side effect of this is that the slaves may be one transaction behind the master
during periods of low volume.

To fix the side effect, a 'GenerateSnapshotThread' has been added, which generates a snapshot
once every configurable miliseconds (by default, 1000ms, or 1s). This snapshot is taken within
a transaction with no other changes, so it does not matter that its transaction gets processed
or not.

An interesting side effect of the side effect fix is this: There will always be a snapshot once
every N miliseconds to process, and this should make replication lag to the slaves more
predictable, and thus, more monitorable. Particularly so during periods of very low volume.

Some other minor changes included in this checkin:

* ReplicationDaemon names the GenerateSnapshotThread, so I made it name the LogSwitchThread too.
* TidsBetweenSnapshotSet now has a meaningful toString() method.

-fin-

Branch point for: 0.5

3 new annotated / raw | Lines: 147 ( +147, -0 )

Created: 2007-06-27 14:02:14 -0500 (10 months ago) | Author: lanceball | Changeset: 3

Initial import of bruce source

latest revision download root:

119 annotated / raw | Diffs: previous, other | Lines: 150 ( +6, -12 )

Created: 2007-11-16 17:36:47 -0600 (5 months 28 days ago) | Author: rklahn | Changeset: 119

LogSwitchThread becomes LogSwitchHelper. No longer runs in its own thread. Rather, provides methods that will switch logs from within any thread. Soon, all slaves will have transaction/snapshot logs in addition to the master, and will need to have their logs switched too.

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113 annotated / raw | Diffs: previous, other | Lines: 156 ( +0, -1 )

Created: 2007-11-14 16:09:18 -0600 (6 months ago) | Author: rklahn | Changeset: 113

More test clases now OK. Touched admin code to close JDBC connection leakage.

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106 annotated / raw | Diffs: previous, other | Lines: 157 ( +1, -1 )

Created: 2007-11-08 19:38:56 -0600 (6 months ago) | Author: rklahn | Changeset: 106

Some changes for replication failover. More to follow

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78 annotated / raw | Diffs: previous, other | Lines: 157 ( +1, -1 )

Created: 2007-09-04 20:24:54 -0500 (8 months ago) | Author: rklahn | Changeset: 78

Copied to: branches/1.0/javasrc/com/netblue/bruce/ReplicationDaemon.java 86

svn:keywords=Id missing on many source files

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