Re: Can 0.94.9 enable multi-thread for memstore flush

See https://issues.apache.org/jira/browse/HBASE-8752 Cheers On Thu, Jul 3, 2014 at 8:37 PM, Li Yong wrote: > Hi all, > In HBASE-6466, it looks like 0.95.0 can enable multi-thread for > memstore flush,my question is ,can 0.94.9 do the same ? > > > > > Thanks, > Li

Can 0.94.9 enable multi-thread for memstore flush

Hi all, In HBASE-6466, it looks like 0.95.0 can enable multi-thread for memstore flush,my question is ,can 0.94.9 do the same ? Thanks, Li

Re: What is the impact if hbase master downs?

Glad it helped! -Sent from mobile, please excuse typos Mikhail > On Jul 3, 2014, at 18:22, yl wu wrote: > > Hi Mikhail, > > Thank you so much! Your reply really resolve my confusions. > > Best, > Yanglin > > > 2014-07-03 16:31 GMT+08:00 Mikhail Antonov : > >> With HBASE-10569, all masters

Re: What is the impact if hbase master downs?

Hi Mikhail, Thank you so much! Your reply really resolve my confusions. Best, Yanglin 2014-07-03 16:31 GMT+08:00 Mikhail Antonov : > With HBASE-10569, all masters are implicitly also region servers (both > active master and backup masterS), and can host regions (depending on load > balancer se

Re: [ANNOUNCE] HBase 0.94.21 is available for download

+1. Thank you HBase team for your continuous efforts and support. [image: http://] Tariq, Mohammad about.me/mti [image: http://] On Thu, Jul 3, 2014 at 10:05 PM, lars hofhansl wrote: > The HBase Team is pleased to announce the immediate release of HBase > 0.94.21.

[ANNOUNCE] HBase 0.94.21 is available for download

The HBase Team is pleased to announce the immediate release of HBase 0.94.21. Download it from your favorite Apache mirror [1]. This release has also been pushed to Apache's maven repository. All previous 0.92.x and 0.94.x releases can upgraded to 0.94.21 via a rolling upgrade without downtime, i

Re: HBase chain MapReduce job with broadcasting smaller tables to all Mappers

Did you read the summary object through HTable API in Job #2 ? Cheers On Thu, Jul 3, 2014 at 9:14 AM, Arun Allamsetty wrote: > Hi, > > I am trying to write a chained MapReduce job on data present in HBase > tables and need some help with the concept. I am not expecting people to > provide code

HBase chain MapReduce job with broadcasting smaller tables to all Mappers

Hi, I am trying to write a chained MapReduce job on data present in HBase tables and need some help with the concept. I am not expecting people to provide code by pseudo code for this based on HBase's Java API would be nice. In a nutshell, what I am trying to do is, MapReduce Job 1: Read data fr

Re: What is the impact if hbase master downs?

With HBASE-10569, all masters are implicitly also region servers (both active master and backup masterS), and can host regions (depending on load balancer settings). Region server process can't become a master, backup masters are regular hbase masters, which just happened to not be chosen as active

Re: What is the impact if hbase master downs?

Hi Mikhail, Thank you very much for your quick reply. I understand the process you mentioned. What I am confued is that, how this new one takes over the responsibilities in details? By the way, what is the physical relationship between backup masters and the region servers? Can a region server bec

Re: What is the impact if hbase master downs?

The impact of master going down is that during the period when cluster runs without master, certain operations can't be performed (for example, admin operations like creating or modifying tables, or internal cluster workflows like distributed log splitting to handle crashed region servers or region

Re: What is the impact if hbase master downs?

Hi Yanglin, what exactly do you mean by "system..need to take any failover" - any manual action by cluster admin? Failover happens automatically based on zookeeper timeout for current active master. Currently, hbase cluster has 1 active master and several backup masters. When backup masters notice

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