What is the impact if hbase master downs?

Hi All, I've read many articles, including Bertozzi's Who needs a Master, but I am still confused about the Hmaster. If the Hmaster goes down, does the system need to take any failover ? Or just elect a new master, and the new one can restore all the information from hbase:meta? Best regards, Ya

Re: What is the impact if hbase master downs?

ew one takes over > responsibilities. > > -Mikhail > > > 2014-07-03 0:40 GMT-07:00 yl wu : > > > Hi All, > > > > I've read many articles, including Bertozzi's Who needs a Master, but I > am > > still confused about the Hmaster. > > >

Re: What is the impact if hbase master downs?

meta/namespace regions >* Handle either fresh cluster start or master failover >* > > Hope it helps. > > -Mikhail > > > > > 2014-07-03 1:06 GMT-07:00 yl wu : > > > Hi Mikhail, > > > > Thank you very much for your quick reply. > > I un

How Hbase achieves efficient random access?

Hi All, HBase has sorted and indexed Hfile format, which enables fast lookup. I am wondering is there any other feature help Hbase achieve efficient random access? I want to know the whole story, but I can't find any article talks about random access in HBase in high level. Can anyone help me res

Re: How Hbase achieves efficient random access?

ata. > > > > See HFile Format in more details, (meta index, data index ...) > > > > Good Luck!! > > > > > > 2014-07-04 17:30 GMT+09:00 Ted Yu : > > > > > Please take a look at http://hbase.apache.org/book/perf.reading.html > > > > &

Can I put all columns into a row key?

Hi all, I am trying to design the row key for a table. Our application would perform many queries on columns. My question is that is that a good way to put all values from columns into the row key? Thus I can use filters like FuzzyRowFilter to get rows and parse the values directly from row keys.