Hi, Trafodion uses the MVCC concurrency model. So reads are always allowed. It checks for conflicts at transaction commit.
Updates made by a transaction become visible to other reads at commit time. Regards, Dave -----Original Message----- From: Michael Segel [mailto:[email protected]] Sent: Wednesday, June 11, 2014 2:08 PM To: [email protected] Subject: Re: White papers/Solution implemented to use HIVE/HBASE as OLTP So how do you handle isolation? Dirty reads? The point is that you can have scenarios where data exists yet is missing from other queries. On Jun 11, 2014, at 4:27 AM, Tapper, Gunnar <[email protected]> wrote: > Trafodion is a bit more than a transaction engine: it's a full-fledge SQL > implementation on top of HBase. > > Thanks, > > Gunnar > > The person that says it cannot be done should not interrupt the person doing > it. > > Download a free version of HPDSM, a unified big-data administration > tool for Vertica and Hadoop at: http://www.vertica.com/marketplace > > > -----Original Message----- > From: Ted Yu [mailto:[email protected]] > Sent: Tuesday, June 10, 2014 5:48 PM > To: [email protected] > Subject: Re: 答复: White papers/Solution implemented to use HIVE/HBASE > as OLTP > > One more transaction engine: trafodion > > See public wiki at http://wiki.trafodion.org > > > On Mon, Jun 9, 2014 at 7:48 PM, Ted Yu <[email protected]> wrote: > >> To my understanding, 0.98.3 would be the next stable release. >> >> Supporting 0.98 in Haeinsa would give more users a chance to try it out. >> >> Cheers >> >> >> On Mon, Jun 9, 2014 at 7:34 PM, James Lee <[email protected]> wrote: >> >>> Ted Yu: >>> Thank you for the notice. >>> >>> I know there are major changes on HBase client interface in 0.98. >>> I'm sure that supporting HBase 0.98 in Haeinsa will be sooner than >>> upgrading of our cluster. >>> There is no plan to upgrade our HBase cluster to 0.98 for now, but >>> supporting HBase 0.98 in Haeinsa is the sooner the better. >>> It would not be too late. >>> >>> Sincerely, >>> James >>> >>> >>> >>> On Tue, Jun 10, 2014 at 2:05 AM, Ted Yu <[email protected]> wrote: >>> >>>> James: >>>> Nice to hear from you. >>>> >>>> I refreshed local workspace for haeinsa. In pom.xml, I see hbase >>>> version of 0.94.3. >>>> Latest 0.94 release was 0.94.20 >>>> >>>> 0.98.3 was released this past weekend. >>>> >>>> Do you have plan to bring 0.98 support to haeinsa ? >>>> >>>> Cheers >>>> >>>> >>>> On Mon, Jun 9, 2014 at 9:49 AM, James Lee <[email protected]> wrote: >>>> >>>>> I'm using HBase as OLTP for about 3 years. >>>>> One of biggest pain point of using HBase as OLTP was lack of >>>>> multi-row transaction. >>>>> >>>>> For this reason, we implemented multi-row transaction on top of HBase. >>>>> It was designed to support OLTP (low latency and so on). >>>>> https://github.com/vcnc/haeinsa/ >>>>> >>>>> There is another approach to support multi-row transaction also. >>>>> It's implementation of Google Percolator on top of HBase, >>>>> developed by XiaoMi developers. >>>>> https://github.com/XiaoMi/themis/ >>>>> >>>>> Regards, >>>>> James. >>>>> >>>>> >>>>> On Tue, Jun 10, 2014 at 12:17 AM, Marcos Ortiz <[email protected]> >>> wrote: >>>>> >>>>>> In the last HBaseCon and in the HBaseCon 2013, there are several >>>>>> use-cases for this combination. >>>>>> http://hbasecon.com >>>>>> You could search at Slideshare.net in the Cloudera's profile >>>>>> using >>> the >>>>>> hbasecon tag all presentations related to the conference. >>>>>> One of my favorite sessions in the HBaseCon 2013 was the >>> presentation >>>>>> called "Low Latency OLAP with HBase" by Cosmin Lehene from Adobe. >>>>>> Best wishes >>>>>> >>>>>> On 09/06/14 05:03, 谢良 wrote: >>>>>>> borthakur.com/ftp/RealtimeHadoopSigmod2011.pdf >>>>>>> >>>>>>> Thanks, >>>>>>> ________________________________________ >>>>>>> 发件人: Ramasubramanian Narayanan [ >>> [email protected]] >>>>>>> 发送时间: 2014年6月9日 13:27 >>>>>>> 收件人: [email protected]; [email protected] >>>>>>> 主题: White papers/Solution implemented to use HIVE/HBASE as OLTP >>>>>>> >>>>>>> Dear All, >>>>>>> >>>>>>> Request your help in providing link to the White papers/Solution >>>>>>> implemented to use HIVE/HBASE as OLTP. >>>>>>> >>>>>>> regards, >>>>>>> Rams >>>>>> >>>>>> -- >>>>>> Marcos Ortiz <http://www.linkedin.com/in/mlortiz> >>>>>> (@marcosluis2186 >>>>>> <http://twitter.com/marcosluis2186>) >>>>>> http://about.me/marcosortiz >>>>>> >>>>>> VII Escuela Internacional de Verano en la UCI del 30 de junio al >>>>>> 11 >>> de >>>>>> julio de 2014. Ver www.uci.cu >>>>>> >>>>>> >>>>> >>>>> >>>>> -- >>>>> *이 정 행 / Jung-Haeng Lee* >>>>> >>>>> Blog: http://eincs.net >>>>> Facebook: http://www.facebook.com/eincs >>>>> Twitter: http://twitter.com/eincs >>>>> LinkedIn: http://linkedin.com/in/eincs >>>>> >>>> >>> >>> >>> >>> -- >>> *이 정 행 / James Lee* >>> >>> >>> Blog: http://eincs.net >>> Facebook: http://www.facebook.com/eincs >>> Twitter: http://twitter.com/eincs >>> LinkedIn: http://linkedin.com/in/eincs >>> >> >>
