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From "Hiram Chirino" <>
Subject Re: New AcitveMQ HA Option: KahaDB
Date Mon, 24 Nov 2008 18:59:18 GMT
"It's a NEW file based message store...meant to be the successor to
the default Kaha
message store..."

Basically it has all to good stuff of the last one (it smoking fast)
but hopefully none of the bad sides.  It's data files are not binary
compatible.  And I don't have a migration process to move from one to
the other.


On Mon, Nov 24, 2008 at 1:47 PM, Bruce Snyder <> wrote:
> On Mon, Nov 24, 2008 at 11:29 AM, Hiram Chirino <> wrote:
>> Hi Guys,
>> I just got done committing a new module into ActiveMQ trunk which I
>> think you guys may find interesting.  It's a new file based message
>> store called KahaBD and meant to be the successor to the default Kaha
>> message store that is now included in the ActiveMQ 5.0, 5.1, and 5.2
>> release.  Unlike the original Kaha implementation, KahaDB has super
>> fast crash recovery and it's much more space efficient in it's index
>> allocation.  But the really exciting part is that it has low level
>> data replication built into which is much more elegant and has better
>> performance than the Current built in Master Slave option.
>> For details on it's benefits and how to set it up, check out:
>> I would love it if folks could test it out and start reporting any
>> issues they see with it.  Hopefully we can make this the default
>> persistence option for ActiveMQ 6.0, or maybe even 5.3 if it gets
>> enough early testing.
> Is this meant to work in conjunction with the ActiveMQ Store or does
> this supplant the ActiveMQ Store?
> Bruce
> --
> perl -e 'print unpack("u30","D0G)U8V4\@4VYY9&5R\"F)R=6-E+G-N>61E<D\!G;6%I;\"YC;VT*"
> );'
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