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From tendlu <>
Subject Re: Equivalent of Tibco EMS FailSafe
Date Fri, 21 Sep 2007 05:42:52 GMT

Thanks for the reply. Do you happen to know the configuration flag for kaha
persistence to enable syncOnWrite? If kaha does not support that can you let
me know a storage adapter that I can use that supports syncOnWrite?


rajdavies wrote:
> ActiveMQ has a pluggable storage mechanism - and the ability to sync  
> to disk for every write is usually a property of the Store used by  
> the broker.  For amq 5.0  - the default store is the amq store -  
> where the property is syncOnWrite, default is off.
> On Sep 21, 2007, at 12:44 AM, tendlu wrote:
>> James or Hiram?
>> tendlu wrote:
>>> Tibco has a configuration to mark a queue "fail safe". This means the
>>> messages for a "fail safe" queue is synchronously written to the  
>>> disk. In
>>> other words, no buffering is done for write (probably uses fsync  
>>> --  that
>>> gaurantees the data is flushed to the disk). If the server goes  
>>> down, no
>>> message is lost. This is described as the most "reliable mode".
>>> Is there an equivalent to this in ActiveMQ?
>>> Tibco also has a "non fail safe" mode for the queues which means  
>>> it does
>>> not synchronously write to the disk. On other words, some kind of
>>> buffering is done by the writer. "Non fail safe" mode performs far  
>>> better
>>> than "fail safe" because of the synchronous write.
>>> thanks in advance.
>> -- 
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>> Tibco-EMS-FailSafe-tf4485108s2354.html#a12808111
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