Hi Sreehari, The BackupNode isn't really production-ized. I don't think anyone uses it, so it's not surprising that there are a lot of broken parts.
If you're interested in contributing in this area, I would encourage you to look at the HDFS-1073 branch. The BN and CheckpointNode will be undergoing various surgery during the course of this project, so it's a good opportunity to fix it up, add test coverage, etc. -Todd On Wed, May 25, 2011 at 1:08 AM, Sreehari G <sreehar...@huawei.com> wrote: > Hi all , > > In HDFS-903 - ( md5 verification of fsimage ) , with this change , > Backupnode is downloading the image & edit files from namenode everytime > since the difference in checkpoint time is always maintined b/w Namenode and > Backupnode . This happens since Namenode is resetting its checkpoint time > everytime since we are ignoring renewCheckpointTime and passing true > explicitly to rollFsimage during endcheckpoint .. > > Also , though a proposal for using md5 to decide whether to download image > is also mentioned , it doesnt seeem to be implemented .. > > Isn't this downloading of image everytime a problem or am I missing > something ? > > HUAWEI TECHNOLOGIES CO.,LTD. [image: huawei_logo] > > > Solitaire > Domlur > Bangalore > www.huawei.com > > ------------------------------------------------------------------------------------------------------------------------------------- > This e-mail and its attachments contain confidential information from > HUAWEI, which > is intended only for the person or entity whose address is listed above. > Any use of the > information contained herein in any way (including, but not limited to, > total or partial > disclosure, reproduction, or dissemination) by persons other than the > intended > recipient(s) is prohibited. If you receive this e-mail in error, please > notify the sender by > phone or email immediately and delete it! > > -- Todd Lipcon Software Engineer, Cloudera
