Be careful of this, in my own load testing the lock state can be lost over EFS
leading to a “master-master” scenario under heavy load, which can lead to
journal corruption. Check out the lease locking pluggable storage locker,
which is a viable workaround for this problem.
Thanks,
Justin
On 9/2/16, 2:08 PM, "kor...@gmail.com on behalf of Korny Sietsma"
<kor...@gmail.com on behalf of ko...@sietsma.com> wrote:
I think all EFS volumes are that size. It's a play-by-usage model - it did
strike me as risky, a runaway process could cost you a lot of money!
On 2 Sep 2016 4:19 p.m., "Tim Bain" <tb...@alumni.duke.edu> wrote:
Was your EFS as large as the one the OP described? The perceived problem
was that the code couldn't handle a volume that size, not that it couldn't
handle an EFS volume.
On Sep 2, 2016 5:17 AM, "Korny Sietsma" <ko...@sietsma.com> wrote:
> Interesting - we set up ActiveMQ 5.9 successfully on EFS, I'm guessing
> these error messages relate to checks made in later versions of the
> product.
>
> Note that we gave up on this approach - we found that shared filesystem
> master/slave had several problems for us when we tested it with network
lag
> and splits between the master and the EFS file system.
>
> We have since moved to testing LevelDB + Zookeeper, which has been rather
> more reliable in failure scenarios.
>
> - Korny
>
> On 25 August 2016 at 09:16, ishmeister <ibh...@visibilityltd.com> wrote:
>
> > I'm setting up Active MQ in production with a shared file system
> > master/slave
> > configuration (KahaDB). I've set everything up and mounted the EFS on
> both
> > EC2 instances.
> >
> > When I check the disk free stats I get 8 exabytes for the shared file
> > system:
> >
> > $ df -h
> > eu-west-1a.***.efs.eu-west-1.amazonaws.com:/ 8.0E 0 8.0E 0%
> > /mnt/efs
> > Unfortunately, ActiveMQ cannot interpret this number:
> >
> > Store limit is 102400 mb (current store usage is 0 mb). The data
> directory:
> > /mnt/efs/kahadb only has -8796093022208 mb of usable space - resetting
to
> > maximum available disk space: -8796093022207 mb
> > Store limit is -8796093022207 mb, whilst the max journal file size for
> the
> > store is: 32 mb, the store will not accept any data when used.
> >
> > However, this has not prevented ActiveMQ from working as far as I can
> tell.
> > Is it a problem that "the store will not accept any data when used"?
> >
> >
> >
> > --
> > View this message in context: http://activemq.2283324.n4.
> > nabble.com/Active-MQ-Shared-File-System-Master-Slave-with-
> > Elastic-File-System-tp4715818.html
> > Sent from the ActiveMQ - User mailing list archive at Nabble.com.
> >
>
>
>
> --
> Kornelis Sietsma korny at my surname dot com http://korny.info
> .fnord { display: none !important; }
>
