Hi Jeff,
I don't know the HP offerings very well myself, but I know some of our
customers are successfully using lower end NetApp devices.
You should also be aware that work on the NAS-less shared storage is
well under way: HDFS-3077. So if your timeline is more than a few
months out to productio
Todd or anyone who knows,
I'm reviving an old thread because we are collocating into a data center rather than just using the
cloud. You mentioned "We currently require the NFS direcory to be highly available itself. This is
achievable with even pretty inexpensive NAS devices from your vendor
Hi Jeff,
Check out HDFS-3077. We'll probably need the most help when it comes
time to do testing. Any testing you can do on the current HA solution,
non-ideal as it may be, is also immensely valuable. For example, if
you can reproduce the case where it didn't exit upon loss of shared
edits, that w
Thanks for being patient and listening to my rants. I'm excited to see hdfs continue to move
forward. If the organization I'm working for was willing spend some resources to help speed this
process up, where should be start looking? I'm sure there are quite a few jiras on these issues.
Most
On Tue, May 8, 2012 at 12:38 PM, Jeff Whiting wrote:
> It seems the NN was originally written with the assumption that disks fail
> and stuff happens. Hence the ability to have multiple directories store
> your NN data even though each directory is mostly likely redundant / HA.
>
> [start rant]
>
It seems the NN was originally written with the assumption that disks fail and stuff happens. Hence
the ability to have multiple directories store your NN data even though each directory is mostly
likely redundant / HA.
[start rant]
My opinion is that it is a step backwards that the shared ed
On Tue, May 8, 2012 at 11:44 AM, Todd Lipcon wrote:
> On Tue, May 8, 2012 at 10:33 AM, Nathaniel Cook
> wrote:
>> We ran the initializeSharedEdits command and it didn't have any
>> effect, but that my be because of the weird state we got it in.
>>
>> So help me understand: I was under the assumpt
On Tue, May 8, 2012 at 10:33 AM, Nathaniel Cook
wrote:
> We ran the initializeSharedEdits command and it didn't have any
> effect, but that my be because of the weird state we got it in.
>
> So help me understand: I was under the assumption that if shared edits
> went away you would lose the abili
We ran the initializeSharedEdits command and it didn't have any
effect, but that my be because of the weird state we got it in.
So help me understand: I was under the assumption that if shared edits
went away you would lose the ability to failover and that is it. The
active namenode would still fu
On Tue, May 8, 2012 at 7:46 AM, Nathaniel Cook wrote:
> We have be working with an HA hdfs cluster, testing several failover
> scenarios. We have a small cluster of 4 machines spun up for testing.
> We run a namenode on two of the machines and hosted an nfs share on
> the third for the shared edi
We have be working with an HA hdfs cluster, testing several failover
scenarios. We have a small cluster of 4 machines spun up for testing.
We run a namenode on two of the machines and hosted an nfs share on
the third for the shared edits directory. The fourth machine is just a
datanode. We configu
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