The list below 0-6 is quite correct.
It is necessary to first stop all ndbd processes of the old
configuration before starting up the new ndbd nodes with the new
Starting them earlier means they will try connecting to the old ndbd
nodes which will get extremely confused by connections from
I have no direct argument other than safety for also recommending
restart of the management server in the order described below.
All steps are needed and -i in step 5 is very important so that the old
data and configuration info in the ndbd recovery files is removed.
Step 6 can be performed in parallel with a number of instances of
ndb_restore using the backup files created in the ndbd instances.
2004-08-27 kl. 08.10 skrev Devananda:
> I'll give it a test run tomorrow, but I'm fairly sure that you do not
> need (or want) to do #1 or #5. backing up beforehand is of course a
> good idea. At minimum,what needs to happen for the cluster
> configuration to change, change the config.ini (while everything is
> running is fine), then the next 3 steps I'm not sure what order to do
> in - start up the new DB nodes (they wont be able to join the cluster
> at this point) then restart the MGM node (then the new nodes will join
> the cluster) then restart the old nodes, one at a time; or, restart
> the mgm node first, so it rereads the config file, then startup the
> new nodes then restart the old, or restart mgm, restart old, start up
> new nodes.
> However, the dev's may well correct me on all this ;) I've just been
> experimenting alot! hehehe...
> Neopets, Inc
> Crouch, Luke H. wrote:
>> the MySQL guys might correct me on some of this, but to rebuild the
>> node with more db nodes, I think you would have to follow this
>> 0. Use management node to create a global backup
>> 1. Use management node to shut down all the db nodes
>> 2. Shut down the management node
>> 3. Change the config.ini file to include the new DB nodes
>> 4. Bring up the management node
>> 5. Bring up each of the db nodes with ndbd -i
>> 6. Use the management node to restore from the global backup
>> that's the process as I understand it to be...?
>>> -----Original Message-----
>>> From: Clint Byrum [mailto:cbyrum@stripped]
>>> Sent: Thursday, August 26, 2004 11:33 AM
>>> To: cluster@stripped
>>> Subject: adding ndb nodes?
>>> Hey guys, first off.. wow.. lots of good questions on this list
>>> Anyway, I think I have this right, but I'm not sure.
>>> Once the cluster is running.. say with 4 nodes .. can I add nodes
>>> I understand that 6 nodes is a no-no, but say I wanted to add 4 more
>>> nodes after the cluster has been running for a few months and has 5G
>>> data in it.
>>> Here's how I think it works. Correct me where I'm wrong:
>>> 1) Add new nodes to the config on the management server.
>>> 2) Start the new nodes
>>> 3) restart the existing db and api nodes one by one
>>> 4) magically new nodes start getting new inserts.
>>> Or is it more complex than that?
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