What happens then if the nfs server fails or isn't reachable? Does hdfs lock up? Does it gracefully ignore the nfs copy?
Thanks, randy ----- Original Message ----- From: "Joey Echeverria" <j...@cloudera.com> To: common-user@hadoop.apache.org Sent: Wednesday, December 7, 2011 6:07:58 AM Subject: Re: HDFS Backup nodes You should also configure the Namenode to use an NFS mount for one of it's storage directories. That will give the most up-to-date back of the metadata in case of total node failure. -Joey On Wed, Dec 7, 2011 at 3:17 AM, praveenesh kumar <praveen...@gmail.com> wrote: > This means still we are relying on Secondary NameNode idealogy for > Namenode's backup. > Can OS-mirroring of Namenode is a good alternative keep it alive all the > time ? > > Thanks, > Praveenesh > > On Wed, Dec 7, 2011 at 1:35 PM, Uma Maheswara Rao G > <mahesw...@huawei.com>wrote: > >> AFAIK backup node introduced in 0.21 version onwards. >> ________________________________________ >> From: praveenesh kumar [praveen...@gmail.com] >> Sent: Wednesday, December 07, 2011 12:40 PM >> To: common-user@hadoop.apache.org >> Subject: HDFS Backup nodes >> >> Does hadoop 0.20.205 supports configuring HDFS backup nodes ? >> >> Thanks, >> Praveenesh >> -- Joseph Echeverria Cloudera, Inc. 443.305.9434
