[
https://issues.apache.org/jira/browse/HDFS-5442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13993487#comment-13993487
]
Dian Fu commented on HDFS-5442:
-------------------------------
Hi yeqi,
As Vinay pointed out, any modify operations by clients should not be allowed in
mirror cluster. Actually your proposal “MR job execution efficiency cross DCs”
extends our design. The goal of our design is to handle datacenter failures and
provide an efficient solution of zero data loss, low latency and high
throughput across multiple geographical clusters. But your proposal “MR job
execution efficiency cross the DCs” is a great idea. You can open a new JIRA
and give detailed description about it. Then we can discuss further about it.
> Zero loss HDFS data replication for multiple datacenters
> --------------------------------------------------------
>
> Key: HDFS-5442
> URL: https://issues.apache.org/jira/browse/HDFS-5442
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Avik Dey
> Assignee: Dian Fu
> Attachments: Disaster Recovery Solution for Hadoop.pdf, Disaster
> Recovery Solution for Hadoop.pdf
>
>
> Hadoop is architected to operate efficiently at scale for normal hardware
> failures within a datacenter. Hadoop is not designed today to handle
> datacenter failures. Although HDFS is not designed for nor deployed in
> configurations spanning multiple datacenters, replicating data from one
> location to another is common practice for disaster recovery and global
> service availability. There are current solutions available for batch
> replication using data copy/export tools. However, while providing some
> backup capability for HDFS data, they do not provide the capability to
> recover all your HDFS data from a datacenter failure and be up and running
> again with a fully operational Hadoop cluster in another datacenter in a
> matter of minutes. For disaster recovery from a datacenter failure, we should
> provide a fully distributed, zero data loss, low latency, high throughput and
> secure HDFS data replication solution for multiple datacenter setup.
> Design and code for Phase-1 to follow soon.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
