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From Doug Meil <doug.m...@explorysmedical.com>
Subject Re: Allowed upper limit to HColumnDescriptor.setMaxVersion(..)?
Date Tue, 04 Oct 2011 23:32:16 GMT

The default for versioning is 3, unfortunately the sub-section also cites
(incorrectly) that the min is 0.  That sub-section is trying to indicate
the minimum legal value.  I am working on clearing that entry up with
another developer.





On 10/4/11 6:04 PM, "Micah Whitacre" <mkwhitacre@gmail.com> wrote:

>Are you surmising that from the description of setting a minimum version?
>
>On Tue, Oct 4, 2011 at 2:31 PM, Doug Meil <doug.meil@explorysmedical.com>
>wrote:
>>
>> http://hbase.apache.org/book.html#schema.versions
>>
>>
>> I believe if you set that to 0 it should disable the versioning.
>>
>>
>>
>> On 10/4/11 2:21 PM, "Micah Whitacre" <mkwhitacre@gmail.com> wrote:
>>
>>>I guess what I'm asking is there a way to set "infinite" or no max
>>>bounds on versions (e.g. setMaxVersion(-1) possibly)?  Or do I have to
>>>call setMaxVersion(Integer.MAX_VALUE) or setMaxVersion(<some large
>>>guess>)?  If a large guess is the way to go, what sort of overhead
>>>costs might we need to consider when finding the right balance point
>>>between room to grow and the maintenance support cost of needing to
>>>expand later?
>>>
>>>We plan on building MapReduce jobs to clean up versions based on some
>>>conditions so the value shouldn't get that large but the conditions
>>>for cleaning up those versions might be decided by other consumers of
>>>the service.  So having room to grow is ideal.
>>>
>>>On Tue, Oct 4, 2011 at 11:36 AM, Doug Meil
>>><doug.meil@explorysmedical.com> wrote:
>>>>
>>>> Hi there-
>>>>
>>>> re:  "i don't care store them all"
>>>>
>>>>
>>>> What do you mean?
>>>>
>>>>
>>>>
>>>> On 10/4/11 12:20 PM, "Micah Whitacre" <mkwhitacre@gmail.com> wrote:
>>>>
>>>>>In reading the documentation all I've seen suggestions on how to set
>>>>>the value and the default value.  However I haven't seen any
>>>>>indication how to set the value to "i don't care store them all" or if
>>>>>there is a maximum bounds aside from Integer.MAX_VALUE.  Does anyone
>>>>>know?
>>>>>
>>>>>Thanks,
>>>>>Micah
>>>>>
>>>>>[1] -
>>>>>http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/HColumnDescrip
>>>>>to
>>>>>r.
>>>>>html#setMaxVersions(int)
>>>>
>>>>
>>
>>


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