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From Bryan Talbot <btal...@aeriagames.com>
Subject Re: Multiple JBOD data directory
Date Wed, 05 Jun 2013 22:00:33 GMT
... sorry, message got cut off


# policy for data disk failures:
# stop: shut down gossip and Thrift, leaving the node effectively dead, but
#       can still be inspected via JMX.
# best_effort: stop using the failed disk and respond to requests based on
#              remaining available sstables.  This means you WILL see
obsolete
#              data at CL.ONE!
# ignore: ignore fatal errors and let requests fail, as in pre-1.2 Cassandra
disk_failure_policy: stop





On Wed, Jun 5, 2013 at 2:59 PM, Bryan Talbot <btalbot@aeriagames.com> wrote:

> If you're using cassandra 1.2 then you have a choice specified in the yaml
>
>
> # policy for data disk failures:
> # stop: shut down gossip and Thrift, leaving the node effectively dead, but
> #       can still be inspected via JMX.
> # best_effort: stop using the failed disk and respond to requests based on
> #              remaining available sstables.  This means you WILL see
> obsolete
> #              data at CL.ONE!
> # ignore: ignore fatal errors a
>
>
> -Bryan
>
>
>
> On Wed, Jun 5, 2013 at 6:11 AM, Christopher Wirt <chris.wirt@struq.com>wrote:
>
>> I would hope so. Just trying to get some confirmation from someone with
>> production experience. ****
>>
>> ** **
>>
>> Thanks for your reply****
>>
>> ** **
>>
>> *From:* Shahab Yunus [mailto:shahab.yunus@gmail.com]
>> *Sent:* 05 June 2013 13:31
>> *To:* user@cassandra.apache.org
>> *Subject:* Re: Multiple JBOD data directory****
>>
>> ** **
>>
>> Though, I am a newbie bust just had a thought regarding your question 'How
>> will it handle requests for data which unavailable?', wouldn't the data be
>> served in that case from other nodes where it has been replicated?****
>>
>> ** **
>>
>> Regards,****
>>
>> Shahab****
>>
>> ** **
>>
>> On Wed, Jun 5, 2013 at 5:32 AM, Christopher Wirt <chris.wirt@struq.com>
>> wrote:****
>>
>> Hello, ****
>>
>>  ****
>>
>> We’re thinking about using multiple data directories each with its own
>> disk and are currently testing this against a RAID0 config.****
>>
>>  ****
>>
>> I’ve seen that there is failure handling with multiple JBOD.****
>>
>>  ****
>>
>> e.g. ****
>>
>> We have two data directories mounted to separate drives****
>>
>> /disk1****
>>
>> /disk2****
>>
>> One of the drives fails ****
>>
>>  ****
>>
>> Will Cassandra continue to work?****
>>
>> How will it handle requests for data which unavailable?****
>>
>> If I want to add an additional drive what is the best way to go about
>> redistributing the data? ****
>>
>>  ****
>>
>> Thanks,****
>>
>> Chris****
>>
>> ** **
>>
>
>

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