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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Configuring Cassandra
Date Wed, 09 Dec 2009 14:50:48 GMT
Why is that tricky?  That's what bootstrap will give you automatically :)

On Wed, Dec 9, 2009 at 8:10 AM, Sunil Khedar <sunil@truesparrow.com> wrote:
> And while adding 2nd DC we have to make sure that, nodes along the ring
> should alternate data centers to avoid hot spots. As you explained in
> http://wiki.apache.org/cassandra/Operations
>
> And that can be a tricky. Correct?
>
> Thanks,
> Sunil
>
> On Wed, Dec 9, 2009 at 7:06 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
>>
>> It should work, but because of the way RAS works you need to have
>> equal nodes in DCs for it to be balanced.  so, when you do decide to
>> add the 2nd DC, you should add as many nodes as you have in the first.
>>
>> On Wed, Dec 9, 2009 at 4:27 AM, Sunil Khedar <sunil@truesparrow.com>
>> wrote:
>> > "Replication strategy may not be changed without wiping your data and
>> > starting over."
>> >
>> > To start with I want to have all my nodes in a single DC. But over a
>> > time of
>> > period, nodes will be placed in multiple DCs. In that is it safe to
>> > start
>> > using "RackAwareStrategy" even if nodes are in a single DC? So, that
>> > when I
>> > start using multiple DCs, data wiping won't be required.
>> >
>> > -Sunil
>> >
>> > On Wed, Dec 9, 2009 at 4:27 AM, Jonathan Ellis <jbellis@gmail.com>
>> > wrote:
>> >>
>> >> On Tue, Dec 8, 2009 at 7:21 AM, Rakesh Sharma <rakrma@gmail.com> wrote:
>> >> > f) Can I take backups from each node and merge them on a single node?
>> >> > Or
>> >> > it's not at all required?
>> >>
>> >> All you would need to do would be to copy the snapshotted sstables
>> >> into the data directory on the target node, but I'm not sure why you
>> >> would want to do that.
>> >>
>> >> I wrote http://wiki.apache.org/cassandra/Operations to answer the
>> >> other questions in more detail. :)
>> >>
>> >> -Jonathan
>> >
>> >
>
>

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