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From hdev ml <hde...@gmail.com>
Subject Re: HBase Replication Questions
Date Mon, 28 Oct 2013 22:23:05 GMT
Thanks Demai. Need to find out how to access HBase metrics.

But thanks for your insights.
Harshad


On Mon, Oct 28, 2013 at 2:45 PM, Demai Ni <nidmgg@gmail.com> wrote:

> 1)  you can use replication metrics info such as:ageOfLastShippedOp,
> timeStampsOfLastShippedOp, sizeOfLogQueue ageOfLastAppliedOp, and
> timeStampsOfLastAppliedOp to figure out the lag.
> 2) with my best knowledge, the replication won't be together with snapshot.
> That is the peers won't know there is a restore occurred on primary. So a
> user must take care it manually.   the VerifyReplication tool may be
> helpful to identify which data (boundary by timestamps) is mismatch, so the
> copyTable doesn't have to copy the whole table
>
> Demai
>
> Demai
>
>
> On Mon, Oct 28, 2013 at 12:07 PM, hdev ml <hdevml@gmail.com> wrote:
>
> > Hello all,
> >
> > I have a couple of questions for HBase.
> >
> > 1. Is there any way to find out by how much time the replication is
> lagging
> > on the peer cluster or even primary cluster is ok.
> > 2. Say replication is going on for some time for a table and then you
> > restore a snapshot on the Primary. Would replication catch up with the
> > restore snapshot? Or do I have to treat that as replicating from scratch,
> > meaning
> >
> >    1. disable peer
> >    2. restore snapshot on primary
> >    3. copyTable upto disable timestamp
> >    4. enable peer
> >
> >
> > Any help is appreciated.
> >
> > Thanks
> >
> > Harshad
> >
>

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