Thanks for the prompt reply, Lu. It is true that having a smaller region file size can solve the problem. But it also have side effects. For example, total number of regions can be easily doubled/tripled, and I am already facing a challenge of having too many regions per server. So I cannot go to that route.
From: 陆巍 [mailto:luwei...@163.com] Sent: Wednesday, July 13, 2016 11:24 AM To: user@hbase.apache.org; Frank Luo <j...@merkleinc.com> Subject: Re:is possible to create multiple TableSplit per region? here is an archived mail: http://mail-archives.apache.org/mod_mbox/hbase-user/201303.mbox/%3cblu0-smtp19115a8967869d6cf0d49ef8f...@phx.gbl%3E At 2016-07-13 23:20:28, "Frank Luo" <j...@merkleinc.com<mailto:j...@merkleinc.com>> wrote: >We have mapper only jobs operating on a result of a Scan. Because of heavy >work downstream, the mapper runs fairly slowly. So I am wondering if there is >a way to create multiple TableSplit on one region hence multiple mappers can >be created to work on different piece of date on the region. > >I am aware of MultithreadedTableMapper class, which could be my solution, but >I hesitate to use it as my code is not thread safe. > >So any suggestions, or code to share? > > > >Download the latest installment of our annual Marketing Imperatives, “Winning >with People-Based >Marketing”<http://www2.merkleinc.com/l/47252/2016-04-26/3lbfd1> > >This email and any attachments transmitted with it are intended for use by the >intended recipient(s) only. If you have received this email in error, please >notify the sender immediately and then delete it. If you are not the intended >recipient, you must not keep, use, disclose, copy or distribute this email >without the author’s prior permission. We take precautions to minimize the >risk of transmitting software viruses, but we advise you to perform your own >virus checks on any attachment to this message. We cannot accept liability for >any loss or damage caused by software viruses. The information contained in >this communication may be confidential and may be subject to the >attorney-client privilege. Download the latest installment of our annual Marketing Imperatives, “Winning with People-Based Marketing”<http://www2.merkleinc.com/l/47252/2016-04-26/3lbfd1> This email and any attachments transmitted with it are intended for use by the intended recipient(s) only. If you have received this email in error, please notify the sender immediately and then delete it. If you are not the intended recipient, you must not keep, use, disclose, copy or distribute this email without the author’s prior permission. We take precautions to minimize the risk of transmitting software viruses, but we advise you to perform your own virus checks on any attachment to this message. We cannot accept liability for any loss or damage caused by software viruses. The information contained in this communication may be confidential and may be subject to the attorney-client privilege.
