Thanks all for your comments.
I was talking about the 3 minutes period because by default, ZK will
have a 3 minute timeout. So if a server crash, it can take up to 3
minutes to Zookeeper to detect that. And in this meantime, the client
might not be able to access the impacted regions.
So what I w
Hey Mike,
A move is logical in terms of a region and region servers (i.e. only
an ID and a command is passed around), but yes the location of blocks
could impact its performance a bit (until a further compaction), but
would not prevent availability.
On Mon, Dec 3, 2012 at 3:53 PM, Michel Segel w
He could have meant that the region was unavailable for a longer duration.
My take is that you could have limited bandwidth, and a very large region on
the move.
While I don't imagine that it could take that long to move a region, you never
know how things are tuned and you could in theory hit a
If a server crashes, its regions will be moved to other servers. So, if a
query fails because the region server does not respond, the hbase client
will retry as well. The principle is to make the failure transparent to the
application using the hbase client.
Le 3 déc. 2012 03:53, "Jean-Marc Spaggia
Hi Jean
Incase of Puts and Scans if the split is in progress it will retry.
Suppose before the client gets to know about the split, still if the put
is directed with the parent region row key, internally HBase directs it to
the correct daughter region.
But i am not clear in what you mean by Regio
Ok. so if on the client side I'm "simply" using Puts, scans and gets
fron the HTableInterface, I don't have to worry about that since it
will retry.
But I still should consider catching exceptions when regions are not
available because the region server is down for less than 3 minutes,
right?
Tha
It's not accessible, but it's more or less transparent (latency impact
aside) for the end user: the hbase client will retry the operation.
On Sun, Dec 2, 2012 at 11:10 PM, Jean-Marc Spaggiari <
jean-m...@spaggiari.org> wrote:
> ?
Hi,
When a region is moving or splitting, is it still accessible? Or the
region is offline until the operation ends?
Thanks,
JM
