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From Justin Reock <>
Subject Re: Active MQ Shared File System Master Slave with Elastic File System
Date Fri, 09 Sep 2016 05:33:47 GMT
Thanks Tim! I recently posted a blog article on this subject, if the user community would like
some details about the pluggable storage locker implementation:

I hope it’s helpful.


On 9/2/16, 11:53 PM, " on behalf of Tim Bain" < on behalf
of> wrote:

    It rules out using EFS for your locker implementation, but as Justin said,
    pluggable lockers would allow you to put your data into an EFS but use
    another mechanism for locking to determine ownership.  But obviously there
    would need to be a fix to the code that figures out whether there's enough
    space on the volume before that would work.
    On Fri, Sep 2, 2016 at 4:17 PM, ishmeister <> wrote:
    > The issue is perhaps that EFS supports NFS4 but with the following
    > limitations:
    > In particular: "All locks in Amazon EFS are advisory, which means that READ
    > and WRITE operations do not check for conflicting locks before the
    > operation
    > is executed."
    > Whereas the ActiveMQ docs seem to be quite clear on this matter: "Note that
    > the requirements of this failover system are a distributed file system like
    > a SAN for which exclusive file locks work reliably."
    > So I guess that effectively rules out using EFS.
    > --
    > View this message in context: http://activemq.2283324.n4.
    > Elastic-File-System-tp4715818p4716132.html
    > Sent from the ActiveMQ - User mailing list archive at

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