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From "Joey Echeverria" <>
Subject Re: client config files
Date Thu, 01 Aug 2013 20:33:43 GMT
I generally prefer properties files to XML, but there may be a argument for reusing Hadoop's
SSL configuration system which is XML based. 

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On Thu, Aug 1, 2013 at 3:08 PM, Christopher <> wrote:

> ^ Another reason I like commons-configuration here is for
> property-interpolation with HierarchicalConfiguration.
> --
> Christopher L Tubbs II
> On Thu, Aug 1, 2013 at 3:07 PM, Christopher <> wrote:
>> I absolutely DO think they should be combined in a properties file
>> located in $HOME/.accumulo/config
>> I absolutely DO NOT think this client configuration should be
>> exclusive to the shell, and I absolutely DO NOT think it should be
>> XML.
>> I would love to see all our clients/client code use
>> commons-configuration to hold properties from the properties file, so
>> that only a --config parameter is needed (with reasonable defaults, so
>> even that is not absolutely necessary). I also think that every
>> property that can exist in the file should be possible to override on
>> the command-line. I personally prefer to use system properties, using
>> commons-configuration's HierarchicalConfiguration, but jcommander may
>> make it easier to do the same thing in a slightly different way.
>> --
>> Christopher L Tubbs II
>> On Thu, Aug 1, 2013 at 12:25 PM, Michael Berman <> wrote:
>>> As part of SSL, we need to introduce configuration so accumulo clients
>>> (such as ZooKeeperInstance) can find trust stores.  It seems like this has
>>> a lot in common with shell config files in ACCUMULO-1397.  Do people think
>>> these should be combined, or should the shell have its own separate config?
>>>  I was imagining a simple java .properties-style key=value list.  Does this
>>> seem reasonable?  Or should the format be more like the xml of the site
>>> config?  I was also imagining looking through a list of files that would
>>> each override settings, perhaps in the following order (from lowest to
>>> highest priority):
>>> /etc/accumulo/client.conf
>>> $ACCUMULO_HOME/conf/client.conf
>>> $HOME/.accumulo/config
>>> --client-config command line switch for shell or explicit parameter passed
>>> to ZooKeeperInstance
>>> Does this sound good to y'all?  Should the explicit switch/parameter have
>>> per-property override semantics, or should it just be used as the exclusive
>>> source of properties if specified?
>>> Mike Drob, are you actively working on the shell side of this already?  I
>>> see that bug is assigned to you...
>>> Thanks,
>>> Michael
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