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From Jeff Storey <storey.j...@gmail.com>
Subject Re: Region server failover
Date Thu, 13 Mar 2014 22:59:11 GMT
That makes sense as well, thanks.


On Thu, Mar 13, 2014 at 5:10 PM, Vladimir Rodionov
<vrodionov@carrieriq.com>wrote:

> People usually add some code on top to mitigate down time.
> for non blocking writes - add in memory or persistent queue
> for non blocking reads - add intermediate cache.
>
> Best regards,
> Vladimir Rodionov
> Principal Platform Engineer
> Carrier IQ, www.carrieriq.com
> e-mail: vrodionov@carrieriq.com
>
> ________________________________________
> From: Jeff Storey [storey.jeff@gmail.com]
> Sent: Thursday, March 13, 2014 1:54 PM
> To: user@hbase.apache.org
> Subject: Re: Region server failover
>
> Thanks for the quick reply. It looks like this feature is in the works.
>
> What are people doing in the absence of this feature? Simply allowing the
> downtime?
>
>
> On Thu, Mar 13, 2014 at 4:51 PM, Ted Yu <yuzhihong@gmail.com> wrote:
>
> > Take a look at HBASE-10070:
> > HBase read high-availability using eventually consistent region replicas
> >
> > Cheers
> >
> >
> > On Thu, Mar 13, 2014 at 1:49 PM, Jeff Storey <storey.jeff@gmail.com>
> > wrote:
> >
> > > I'm still somewhat new to HBase and I'm trying to understand
> > possibilities
> > > for region server failover. If I have a region server that goes down,
> it
> > > looks like I won't have any access to that region's data until a backup
> > > server comes online. I read that I can reduce the zookeeper timeout to
> > > minimize that time down, but in a system that is meant to be highly
> > > available, it seems like this could be cause for concern since a
> portion
> > of
> > > the data will be entirely inaccessible.
> > >
> > > Is there a way to have a secondary read-only region server that becomes
> > the
> > > new primary region server in the event of a failure? This way that data
> > > will always be accessible unless all of the region server backups fail?
> > Or
> > > are there other ways to replicate region data to avoid loss of access
> for
> > > possibly several minutes to that data if the server goes down?
> > >
> > > Thanks,
> > > Jeff
> > >
> >
>
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