If the client needs to access data that is managed by the server that went down, then it would block. Losing a RangeServer does not result in data loss (all data is written into HDFS). Currently, you need to bring the server back up, or replace it with a new one to recover the data.
- Doug On Wed, May 18, 2011 at 6:34 PM, Pany Yue <[email protected]> wrote: > Thank you Doug. > > I think Mastered directed RangeServer failover is a more important feature > for us. In current version, Does the client blocking when one of the > Rangeserver goes down? Does this causing data loss? > > > > 2011/5/19 Doug Judd <[email protected]> > >> Hi Pany, >> >> Load balancing is one of the main features in the 0.9.5.0 release. It >> will be available in about three weeks. Master directed RangeServer >> failover will come in version 0.9.6.0. The ht_load_generator program is a >> tool that we used for testing. It generates synthetic load as describe by a >> spec file. >> >> - Doug >> >> On Wed, May 18, 2011 at 1:38 AM, Pany Yue <[email protected]> wrote: >> >>> 1. Does the lastest version (0.9.5.0.prev4) implemented load balancing >>> for Hypertable cluster ? >>> I cann't find anycode about it such as LoadBalancer class in >>> src/cc/Hypertable/Master/ directory. >>> >>> 2. What's the usage of $HYPERTABLE_HOME/bin/ht_load_generator ? >>> >>> 3. When a rangeserver goes down, does master re-assigned all of ranges it >>> manages to other rangeservers in version 0.9.5.4.prev4 ? >>> >>> Thank you! >>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Hypertable Development" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/hypertable-dev?hl=en. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Hypertable Development" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/hypertable-dev?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Hypertable Development" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/hypertable-dev?hl=en. > -- You received this message because you are subscribed to the Google Groups "Hypertable Development" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/hypertable-dev?hl=en.
