-Re: Highly Available HDFS ???
Sanjay Radia 2009-03-25, 19:25
On Mar 25, 2009, at 12:07 PM, Sangmin Lee wrote:
> Hi all,
> I am wondering if there is any effort or plans on HA (Highly
> Available) HDFS
> out there.
> Currently, NameNode is single point of failure and recovery requires
Many (and probably most) users of hadoop are using hdfs for batch
As a result HA for name node has not received as high a priority as
other projects since
batch jobs can wait while the name node is restarting.
Clearly this is not acceptable for non-batch use of hdfs.
Suresh has a rough prototype of HA'ed Namenode using linux HA that he
is planning put in contrib one of these days (it is low priority
background task for him).
Sorry that I don't have a better answer.
> In addition, the recovered NameNode may not same as one before the
> Is there any plans or ongoing effort to improve this?