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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Cassandra 0.6.8 snapshot problem?
Date Tue, 02 Aug 2011 21:19:36 GMT
0.6.13 flushes first, and I don't remember changing that earlier in
0.6, but you'd have to check ColumnFamilyStore.snapshot in 0.6.8 to be
100% sure

On Tue, Aug 2, 2011 at 4:08 PM, Jeremiah Jordan
<jeremiah.jordan@morningstar.com> wrote:
> Does snapshot in 0.6 cause a flush to happen first? If not there could
> be data in the database that won't be in the snapshot.  Though that
> seems like a long time for data to be sitting in the commit log and not
> make it to the sstables.
>
> On Thu, 2011-07-28 at 17:30 -0500, Jonathan Ellis wrote:
>> Doesn't ring a bell.  But I'd say if you upgrade and it's still a
>> problem, then (a) you're not _worse_ off than you are now, and (b)
>> it's a lot more likely to get fixed in modern version.
>>
>> On Thu, Jul 28, 2011 at 9:47 AM, Jian Fang
>> <jian.fang.subscribe@gmail.com> wrote:
>> > Hi,
>> >
>> > We have an old production Cassandra 0.6.8 instance without replica, i.e.,
>> > the replication factor is 1. Recently, we noticed that
>> > the snapshot data we took from this instance are inconsistent with the
>> > running instance data. For example, we took snapshot
>> > in early July 2011. From the running instance, we got a record that was
>> > created in March 2011, but on the snapshot copy, the
>> > record with the same key was different and was created in January 2011.
>> > Yesterday, we created another snapshot and reproduced
>> > the problem. I just like to know if this is a known issue for Cassandra 0.6.
>> >
>> > We are going to migrate to Cassandra 0.8, but we need to make sure this will
>> > not be a problem in 0.8.
>> >
>> > Thanks in advance,
>> >
>> > John
>> >
>> >
>>
>>
>>
>
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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