Thanks all -----邮件原件----- 发件人: Jean-Marc Spaggiari [mailto:[email protected]] 发送时间: 2014年6月17日 19:25 收件人: user 主题: Re: regions not balance?
Also, you can set it to TRACE logs from the WebUI. That will help you to see the logic displayed on the logs... JM 2014-06-17 1:23 GMT-04:00 duanp <[email protected]>: > > I think that the balancer may not need to be executed. you can calculate > the value with parameters you set. > > before, i have the same question as yours . > > In the 0.96 , org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer > has a method BaseLoadBalancer.needsBalance determine it . > > > > protected boolean needsBalance(ClusterLoadState cs) { > if (cs.getNumServers() < MIN_SERVER_BALANCE) { > if (LOG.isDebugEnabled()) { > LOG.debug("Not running balancer because only " + cs.getNumServers() > + " active regionserver(s)"); > } > return false; > } > // Check if we even need to do any load balancing > // HBASE-3681 check sloppiness first > float average = cs.getLoadAverage(); // for logging numRegions / > numServers; > int floor = (int) Math.floor(average * (1 - slop)); // > hbase.regions.slop, default 0.2 > int ceiling = (int) Math.ceil(average * (1 + slop)); > if (!(cs.getMaxLoad() > ceiling || cs.getMinLoad() < floor)) { // > NavigableMap<ServerAndLoad, List<HRegionInfo>> serversByLoad = > cs.getServersByLoad(); > if (LOG.isTraceEnabled()) { > // If nothing to balance, then don't say anything unless > trace-level logging. > LOG.trace("Skipping load balancing because balanced cluster; " + > "servers=" + cs.getNumServers() + " " + > "regions=" + cs.getNumRegions() + " average=" + average + " " + > "mostloaded=" + serversByLoad.lastKey().getLoad() + > " leastloaded=" + serversByLoad.firstKey().getLoad()); > } > return false; > } > return true; > } > > > > 发件人： sunweiwei > 发送时间： 2014-06-17 12:55 > 收件人： [email protected] > 主题： 答复: regions not balance? > I'm using hbase0.96. > There is no balancer related logs in master log at that moment. > I find Regions-in-transition is empty in web UI's debug dump. > > Thanks > > > -----邮件原件----- > 发件人: Ted Yu [mailto:[email protected]] > 发送时间: 2014年6月17日 11:41 > 收件人: [email protected] > 主题: Re: regions not balance? > > bq. and return true, but It not works > > Looking at master log, do you see balancer related logs around this time ? > If there was region in transition at this moment, balancer wouldn't perform > balancing. > > What version of HBase are you using ? > > Cheers > > > On Mon, Jun 16, 2014 at 8:19 PM, sunweiwei <[email protected]> > wrote: > > > Hi > > > > I have several regionservers. One regionserver has 434 regions and > > other > > regionservers only have about 300+ regions. > > > > I think it's not balance. Then I run balancer command in hbase shell > > and return true, but It not works. > > > > The regionserver always has 400+ regions. Is this normal? > > > > > > > > Thanks > > > > > > --------------------------------------------------------------------------------------------------- > Confidentiality Notice: The information contained in this e-mail and any > accompanying attachment(s) > is intended only for the use of the intended recipient and may be > confidential and/or privileged of > Neusoft Corporation, its subsidiaries and/or its affiliates. If any reader > of this communication is > not the intended recipient, unauthorized use, forwarding, printing, > storing, disclosure or copying > is strictly prohibited, and may be unlawful.If you have received this > communication in error,please > immediately notify the sender by return e-mail, and delete the original > message and all copies from > your system. Thank you. > > --------------------------------------------------------------------------------------------------- >
