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Date: Wed, 13 May 2015 16:43:22 -0400
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 <CAMsD-yDzyHfkY+NTGH-4aqqhbfqPkwQ-0orQaYxeurCvGGqvrQ@mail.gmail.com>
Subject: Re: 0.32 linear store
From: Matt Broadstone <mbroadst@gmail.com>
To: users <users@qpid.apache.org>
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On Wed, May 13, 2015 at 4:12 PM, Matt Broadstone <mbroadst@gmail.com> wrote:

>
>
> On Wed, May 13, 2015 at 4:10 PM, Matt Broadstone <mbroadst@gmail.com>
> wrote:
>
>> On Wed, May 13, 2015 at 4:04 PM, Kim van der Riet <kim.vdriet@redhat.com>
>> wrote:
>>
>>> The legacystore and linearstore have slightly different directory
>>> structures which were designed to be mutually exclusive.  There was some
>>> debate as to whether to perform an automatic "upgrade" between these, but
>>> it was decided that this would not be a prudent option, as it would make a
>>> subsequent downgrade difficult and there would be multiple copies of
>>> messages, etc. Also, legacystore is still available, although deprecated.
>>> Most users will want to wait until a point where they have no messages to
>>> perform an upgrade.
>>>
>>> For those users which absolutely need to upgrade, there are a few basic
>>> manipulations of the store directory that can be performed by hand or
>>> script (as they will repeat for each queue present).  While this is simple,
>>> it is error-prone, and I don't recommend it unless absolutely necessary.
>>> If you need this, I can provide a description of the steps needed.
>>>
>>> The discussion on this point can be seen here; it also contains an
>>> informational description of the directory change:
>>>
>>>
>>> http://mail-archives.apache.org/mod_mbox/qpid-users/201411.mbox/%3C1415731947.26261.81.camel%40localhost%3E
>>>
>>> Hope that helps,
>>> Kim
>>>
>>>
>> Hey Kim,
>> I'm actually running this in complete isolation, so it's a "fresh
>> install" so to speak. Having said that, qpidd doesn't seem to actually be
>> storing anything. I've pointed my store-dir to /var/run/qpidd, and I can
>> see there's a "qls" folder there, however when I add a durable topic the
>> size of that directory does not increase, and the topic doesn't show up
>> upon broker restart. Is there some configuration I'm missing? +1 to this
>> ticket: https://issues.apache.org/jira/browse/QPID-5493
>>
>> Matt
>>
>>
> I should mention that my test case is just: qpid-config -a
> user/pass@localhost add exchange topic test.topic --durable
>
> Matt
>
>

For future reference, the store was being stored on /var/run, which is a
ram disk in this case. Not an issue when run from a regular disk, apologies
for the noise.

Matt


>
>>
>>>
>>> On 05/13/2015 03:36 PM, Matt Broadstone wrote:
>>>
>>>> Hey again,
>>>> Another issue I've run into switching to 0.32 is the fact that durable
>>>> topics I create are no longer persisted between broker restarts. The
>>>> 0.28
>>>> release that was previously provided only had the legacy store, but 0.32
>>>> has the linear store which I'm trying out.
>>>>
>>>> I provide a path to my store-dir and that's it, is there some other
>>>> configuration option I'm missing here for this? The qpidd logs don't
>>>> indicate any failure, and indicate that the linear-store is in fact
>>>> being
>>>> used. Running qpidd with debug+ shows a whole bunch of information, and
>>>> I
>>>> see the exchanges being added but no corresponding messages from the
>>>> store
>>>> (this may be expected).
>>>>
>>>> Regards,
>>>> Matt
>>>>
>>>>
>>>
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>>
>

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