OK, I will get it and study more. Thanks a lot.
Zhou Shuaifeng(Frank) -----Original Message----- From: Stack [mailto:[email protected]] Sent: Tuesday, June 29, 2010 11:03 PM To: [email protected] Subject: Re: Questions about bloomfilter in hbase No bloomfilters in 0.20.x hbase. They were removed a while ago because poorly implemented. It looks like we did not excise it from everywhere. Bloomfilters will make a comeback in hbase 0.90.0. They have been completely redone and are super fancy. Check them out in the recent developer release drop, 0.89.20100625 Stack On Jun 29, 2010, at 2:40 AM, Zhou Shuaifeng <[email protected]> wrote: > Hi, > > I looked into the source code of hbase, find that the default value of > using bloomfilter is all false. > In the HColumnDescriptor, there is name and default value of bloomfilter. > But I can't find any function to deal with the bloomfilter when the > onoff of bloombilter is TRUE. > > So, what operation does hbase do when the bloomfilter onoff is setting > to True? How to set it if bloomfilter is needed when add column or alter table? > And how to configer the bloomfilter ? (like vector size, nmhash, > etc..) > > Thanks. > > > > ---------------------------------------------------------------------- > ------ > --------------------------------------------------------- > This e-mail and its attachments contain confidential information from > HUAWEI, which is intended only for the person or entity whose address > is listed above. Any use of the information contained herein in any > way (including, but not limited to, total or partial disclosure, > reproduction, or dissemination) by persons other than the intended > recipient(s) is prohibited. If you receive this e-mail in error, > please notify the sender by phone or email immediately and delete it! > >
