Hi, Will do. In the process of trying it out.
On Wed, Feb 5, 2014 at 8:58 AM, Prabath Abeysekera <[email protected]>wrote: > Hi Shani, > > As discussed, please thoroughly evaluate the extension points available to > implement this in a much cleaner way as well as the challenges, etc that > exist while doing this with the latest versions, and update the thread so > those information will be visible for a wider audience. > > > Cheers, > Prabath > > > On Wed, Feb 5, 2014 at 8:46 AM, Shani Ranasinghe <[email protected]> wrote: > >> Hi, >> >> I have made a mistake on the hadoop versions. It is hadoop version 2.2.0. >> https://hadoop.apache.org/releases.html#15+October%2C+2013%3A+Release+2.2.0+available, >> this is the latest recommended release. >> >> >> >> >> On Mon, Feb 3, 2014 at 6:23 PM, Shani Ranasinghe <[email protected]> wrote: >> >>> Hi, >>> >>> Hadoop 2.1.0 release [1] is mentioned to be stable. I suggest we use >>> this feature for SS future release. >>> >>> In hadoop 2, a main feature that is introduced is federation. This is >>> where there can be multiple namenodes/namespaces per cluster. A namenode >>> here means a active namenode, a passive namenode and a secondary namenode. >>> So with this approach, if we dedicate one namenode/namespace per tenant we >>> can get the tenant isolation. >>> >>> As per the discussion I had with Prabath A, and Dhanuka on friday, we >>> had 2 questions, >>> >>> 1) Can there be multiple namespaces in a single namenode? is it >>> recommended? >>> >>> 2) Let's say I have a federated namespace/namenodes. There are two >>> namenodes A /namespace A1 and namenode B/namespace B1, and have 3 >>> datanodes. Can someone from namespace A1, access the datanode's data in >>> anyway belonging to namespace B1. If not how is it handled? >>> >>> IMO this could be handled to some extend with the usage of kerberos in >>> HDFS. The delegation tokens could be of use in this case. However will need >>> to look into this more. >>> >>> I have raised these questions on the HDFS mailing lists, but have not >>> yet got any response. >>> >>> I am yet to try the Hadoop 2 aforementioned release. Will do a POC and >>> update. >>> >>> [1] Hadoop >>> 2.1.0-beta<http://hadoop.apache.org/releases.html#23+September%2C+2013%3A+Release+2.1.1-beta+available> >>> >>> >>> Thanks and Regards >>> *,Shani Ranasinghe* >>> Software Engineer >>> WSO2 Inc.; http://wso2.com >>> lean.enterprise.middleware >>> >>> mobile: +94 77 2273555 >>> linked in: lk.linkedin.com/pub/shani-ranasinghe/34/111/ab >>> >> >> >> >> -- >> Thanks and Regards >> *, Shani Ranasinghe* >> Software Engineer >> WSO2 Inc.; http://wso2.com >> lean.enterprise.middleware >> >> mobile: +94 77 2273555 >> linked in: lk.linkedin.com/pub/shani-ranasinghe/34/111/ab >> > > > > -- > Prabath Abeysekara > Associate Technical Lead, Data TG. > WSO2 Inc. > Email: [email protected] > Mobile: +94774171471 > -- Thanks and Regards *,Shani Ranasinghe* Software Engineer WSO2 Inc.; http://wso2.com lean.enterprise.middleware mobile: +94 77 2273555 linked in: lk.linkedin.com/pub/shani-ranasinghe/34/111/ab
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