Yes, you can move the location of those KahaDB files while ActiveMQ is not running.
http://activemq.apache.org/kahadb.html <broker brokerName="broker" ... > <persistenceAdapter> <kahaDB directory=“/some/other/folder/activemq-data" journalMaxFileLength="32mb"/> </persistenceAdapter> ... </broker> Also, if you have one really big queue that has the slow consumer, and other queues that just have small messages, you can run into a situation where the kahaDB log files may only have a few messages in them to work around this, use the muli-file persistence adapter. <broker brokerName="broker" ... > <persistenceAdapter> <mKahaDB directory="${activemq.base}/data/kahadb"> <filteredPersistenceAdapters> <!-- kahaDB per destinations --> <filteredKahaDB perDestination="true" > <persistenceAdapter> <kahaDB journalMaxFileLength="32mb" /> </persistenceAdapter> </filteredKahaDB> </filteredPersistenceAdapters> </mKahaDB> </persistenceAdapter> ... </broker> On Aug 8, 2014, at 12:59 PM, rajbrinder <rajbrinder.obe...@gmail.com> wrote: > Hi > > I am bit novice in Active MQ domain and would like some expert advice. > > Problem is > > APP Servers ----> Queuing Servers ------> Database > > Our APP servers (producers) write data into Active MQ on Queuing servers, > There is process called Infostore which consumes the message from MQ and > puts the message into the database. > > Because of the slow write speed between Queuing server and Infostore, there > is a huge backlog created on Queuing server (this server has Active MQ ). > And this has caused the /data partition filled up to 100%. > > As the partition is filled up, MQ process has stopped and as a result > Infostore has stopped consuming data hence all system has come to halt. > > There is directory called kahadb which has around 4800 , db-******.log files > and db.redo & db. datat files. > > Can I > > 1. move the latest *.log files to some other partition, so I can free few GB > space on /data partition > > 2. start the MQ , > > 3. ensure that the VO servers arent sending more data to Active MQ, > > 4. infostore process would start consuming data > > 5. stop MQ > > 6. put the *.log files back in time so that the sequence doesnt break when > MQ picks the respective *.log file > > > Could you please advise whether the above is feasible , I have already > started the backup of kahadb directory. Also note that I cannot afford to > loose any data. > > Regards > > start MQ > > > > > -- > View this message in context: > http://activemq.2283324.n4.nabble.com/Moving-db-log-files-as-data-partition-100-full-tp4684330.html > Sent from the ActiveMQ - User mailing list archive at Nabble.com.
