e commitlog_sync in cassandra.yaml)
>>>
>>>
>>> Here is post about looking at multiple versions columns in an
>>>
>>> sstable http://thelastpickle.com/2011/05/15/Deletes-and-Tombstones/
>>>
>>>
>>> Remember that not all "versions" of a column
same column from
>
>
> multiple
>
>
> files into a single version in a single file .
>
>
>
> Hope that helps.
>
>
>
>
> -
>
>
> Aaron Morton
>
>
> Freelance Developer
>
>
> @aaronmorton
>
>
> http://w
).
>>
>> Also
>>
>> compaction will compress multiple versions of the same column from
>>
>> multiple
>>
>> files into a single version in a single file .
>>
>>
>> Hope that helps.
>>
>>
>>
>> -------
4/05/2012, at 9:50 PM, Felipe Schmidt wrote:
>
>
> Yes, I need this information just for academic purposes.
>
>
> So, to read old data values, I tried to open the Commitlog using tail
>
> -f and also the log files viewer of Ubuntu, but I can not see many
>
> informations inside of
>>>> Aaron Morton
>>>> Freelance Developer
>>>> @aaronmorton
>>>> http://www.thelastpickle.com
>>>>
>>>> On 14/05/2012, at 9:50 PM, Felipe Schmidt wrote:
>>>>
>>>> Yes, I need this information just fo
.
>>>
>>> So, to read old data values, I tried to open the Commitlog using tail
>>> -f and also the log files viewer of Ubuntu, but I can not see many
>>> informations inside of the log!
>>> Is there any other way to open this log? I didn't find any Cassandra
>>>
s averybody in advance.
Regards,
Felipe Mathias Schmidt
(Computer Science UFRGS, RS, Brazil)
2012/5/14 zhangcheng2:
After compaciton, the old version data will gone!
zhangcheng2
From: Felipe Schmidt
Date: 2012-05-14 05:33
To: user
Subject: Retrievi
n this log? I didn't find any Cassandra
> API for this purpose.
>
> Thanks averybody in advance.
>
> Regards,
> Felipe Mathias Schmidt
> (Computer Science UFRGS, RS, Brazil)
>
>
>
>
> 2012/5/14 zhangcheng2 :
>
> After compaciton, the old version data will
ll gone!
>>
>>
>> zhangcheng2
>>
>> From: Felipe Schmidt
>> Date: 2012-05-14 05:33
>> To: user
>> Subject: Retrieving old data version for a given row
>> I'm trying to retrieve old data version for some
gt; Date: 2012-05-14 05:33
> To: user
> Subject: Retrieving old data version for a given row
> I'm trying to retrieve old data version for some row but it seems not
> be possible. I'm a beginner with Cassandra and the unique aproach I
> know is looking to the SSTable in th
After compaciton, the old version data will gone!
zhangcheng2
From: Felipe Schmidt
Date: 2012-05-14 05:33
To: user
Subject: Retrieving old data version for a given row
I'm trying to retrieve old data version for some row but it seems not
be possible. I'm a beginner with Cassand
The only way you could get the old value for a column would be to insert
the column value, then flush, then insert the new column, then before
compaction look at the old sstable.
If you insert the value twice in a row without a flush, the old value is
gone, as it only exists in memtables (and
I'm trying to retrieve old data version for some row but it seems not
be possible. I'm a beginner with Cassandra and the unique aproach I
know is looking to the SSTable in the storage folder, but if I insert
some column and right after insert another value to the same row,
after flushing, I only g
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