question Re: What the commands "enable_table_replication" or "disable_table_replication" do in Archives of Support Questions (Read Only)

What the commands "enable_table_replication" or "disable_table_replication" do

silvio_delval — Fri, 16 Dec 2016 19:01:46 GMT

I would like to know if these commands disable the table before activating/deactivating the replication of families so that services using it get stuck.

I know to activate replication manually I have to first disable the table, change to "1" the colum "REPLICATION_SCOPE" and then enable again, so I would like to know if these commands do it automatically...I suppose so, but I want to be sure to calcule impact on services using the table.

Regards,

Silvio

Re: What the commands "enable_table_replication" or "disable_table_replication" do

elserj — Sat, 17 Dec 2016 01:28:40 GMT

As long as "hbase.online.schema.update.enable" is not set to false in hbase-site.xml, this will be done without disabling the table.

Re: What the commands "enable_table_replication" or "disable_table_replication" do

silvio_delval — Mon, 19 Dec 2016 17:20:04 GMT

I can´t see that property explicitely defined as "False" in hbase-site.xml, so I can suppose it is True. We are using HDP 2.3.2.0-2950, wich includes HBase 1.1.2, so I think it is defined as True by default. Is it?

Re: What the commands "enable_table_replication" or "disable_table_replication" do

elserj — Mon, 19 Dec 2016 22:50:11 GMT

Yes, the default is "true". That's why I stated my reply in the way I did. As long as you are not setting the property to false, the (default) value would be true, and thus the table would not be disabled in the process.

Re: What the commands "enable_table_replication" or "disable_table_replication" do

silvio_delval — Mon, 19 Dec 2016 23:52:09 GMT

Ok, thank you very much for answering 🙂