Hi Krishna, I think that's what we need to figure out - why is Phoenix having trouble when you restore the SYSTEM.CATALOG table. Any client or server-side exceptions in the logs when it hangs? Thanks, James
On Sun, Sep 28, 2014 at 6:18 PM, Krishna <research...@gmail.com> wrote: > Hi James, > > I did include SYSTEM.CATALOG table in the backup & restore process. I dont > know why sqlline is having trouble using the backup version - it just hangs, > unless catalog table is dropped from hbase shell. I will see if there are > any errors in logs that's causing the behavior. > > Regards > Krishna > > > On Sunday, September 28, 2014, James Taylor <jamestay...@apache.org> wrote: >> >> Hi Krishna, >> Any reason why the SYSTEM.CATALOG hbase table isn't restored as well >> from backup? Yes, if you try to re-create the SYSTEM.CATALOG by >> re-issuing your DDL statement, Phoenix won't know that the tables were >> Phoenix tables before, so will try to add the empty key value to each >> row. It's possible that an option could be made to avoid this, but >> it'd be good to understand a bit more why this is needed. >> Thanks, >> James >> >> On Sun, Sep 28, 2014 at 1:56 PM, Krishna <research...@gmail.com> wrote: >> > Hi, >> > >> > When I restore hbase from a backup, sqlline gets stuck unless >> > SYSTEM.CATALOG >> > table is dropped. It is automatically re-created via sqlline. However, >> > metadata of previously created phoenix tables is lost. >> > >> > So, to restore the metadata, when a 'CREATE TABLE' statement is >> > re-issued, >> > Phoenix takes very, very long time to execute which I think, is because >> > Phoenix is upserting null value for _0 column qualifier again for every >> > row >> > (billions of rows in the table). >> > >> > Is there a work-around for this by somehow telling Phoenix that the >> > underlying table is already a Phoenix table? Using views is not an >> > option >> > here. If my understanding is wrong, any pointers as to why it takes so >> > long >> > for executing 'CREATE TABLE' statement is appreciated. >> > >> > Thanks >> > >> >
