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From Anthony Ikeda <anthony.ikeda....@gmail.com>
Subject Re: Node setup - recommended hardware
Date Wed, 04 May 2011 17:04:27 GMT
Thanks Adam.



On Wed, May 4, 2011 at 10:02 AM, Serediuk, Adam <
Adam.Serediuk@serialssolutions.com> wrote:

> Having a well known node configuration that is trivial (one step) to create
> is your best maintenance bet. We are using 4 disk nodes in the following
> configuration:
>
> disk1: boot_raid1 os_raid1 cassandra_commit_log
> disk2: boot_raid1 os_raid1 cassandra_data_dir_raid0
> disk3: cassandra_data_dir_raid0
> disk4: cassandra_data_dir_raid0
>
> This gives us a solid stable foundation for the OS and the recommended
> configuration for cassandra commitlog and data dirs. Every node in the ring
> can be replaced with a single command via cobbler to have a replacement
> provisioned from bare metal to take over for a node if it fails. We will
> never bother with repairing a node -  we will replace it entirely upon
> failure from bare metal. The node with the issue will be taken out of
> service, the issue resolved and put back into a pool of spares.
>
>
> On May 4, 2011, at 9:52 AM, Anthony Ikeda wrote:
>
> I wouldn't be concerned more about the performance with this configuration
> I'm looking more form a maintenance perspective - I have to draft some
> maintenance for our infrastructure team whom are used to a standard NAS
> storage setup which Cassandra obviously breaks.
>
> Ultimately, would keeping the cassandra service separate from the data
> and/or commit logs benefit from a recovery perspective where if we lose the
> primary partition, we could restore that from the data that is still on the
> secondary?
>
> What it considered best practice?
> What kind of routine health checks are best to look for daily? monthly?
> annually?
>
> Basically how do you up-skill a technical infrastructure team to be able to
> maintain a Cassandra node ring?
>
> Anthony
>
>
>
> On Wed, May 4, 2011 at 9:39 AM, Eric tamme <etamme@gmail.com> wrote:
>
>> On Wed, May 4, 2011 at 12:25 PM, Anthony Ikeda
>> <anthony.ikeda.dev@gmail.com> wrote:
>> > I just want to ask, when setting up nodes in a Node ring is it
>> worthwhile
>> > using a 2 partition setup? i.e. Cassandra on the Primary, data
>> directories
>> > etc on the second partition or does it really not make a difference?
>> > Anthony
>> >
>>
>>
>> I don't think it makes much difference from a performance perspective
>> at all.  You might want to create a separate LVM for your data, or
>> entire /var
>>
>
>
>

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