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From Avinash Lakshman <avinash.laksh...@gmail.com>
Subject Re: Adding new nodes
Date Fri, 05 Feb 2010 05:49:02 GMT
Hi All

First off Bill I don't think I brainwashed you to an extent where you start
signing off as me :). Don't do that on my check books. That's an interesting
question and like I had said I am not too sure about this is handled in the
current OSS version. Jonathan is your best bet for this response. Writes
will be handled fine like we discussed.

Cheers
Avinash

On Thu, Feb 4, 2010 at 9:46 PM, Bill Hastings <bllhastings@gmail.com> wrote:

>
>
> ---------- Forwarded message ----------
> From: Bill Hastings <bllhastings@gmail.com>
> Date: Thu, Feb 4, 2010 at 9:41 PM
> Subject: Re: Adding new nodes
> To: cassandra-user@incubator.apache.org
>
>
> Hi All
>
> I just had a conversation with one of the FB guys (Avinash) at FB and
> landed up signing off as him :). He wasn't quite sure about how this works
> in the OSS branch. Hence the question to the broader audience. The question
> is more about the change in topology and reads going to a machine before
> data migration.
>
> Cheers
> Bill
>
>
> On Thu, Feb 4, 2010 at 9:36 PM, Bill Hastings <bllhastings@gmail.com>wrote:
>
>> Sorry I guess I was not clear enough. While the existing data is being
>> moved do requests for reads go to the new nodes? If so what if that data has
>> not yet migrated? There is no problem for writes. But how is the routing for
>> the reads handled in this situation?
>>
>> Cheers
>> Avinash
>>
>>
>> On Thu, Feb 4, 2010 at 9:07 PM, Jonathan Ellis <jbellis@gmail.com> wrote:
>>
>>> Data is moved to the new correct nodes.
>>>
>>> On Thu, Feb 4, 2010 at 10:52 PM, Bill Hastings <bllhastings@gmail.com>
>>> wrote:
>>> > Hi All
>>> >
>>> > Could someone explain to me how the following is done - when new nodes
>>> are
>>> > added how do we read existing data since the topology changes? How does
>>> > Cassandra ensure that reads and writes are successful?
>>> >
>>> > Cheers
>>> > Bill
>>> >
>>>
>>
>>
>
>
>
> --
> Cheers
> Bill
>

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