Thanks for your response. I will take a look.
yong On Thu, Feb 7, 2013 at 10:11 PM, Ted Yu <yuzhih...@gmail.com> wrote: > Yonghu: > You may want to take a look at HBASE-5416: Improve performance of scans > with some kind of filters. > It would be in the upcoming 0.94.5 release. > > You can designate an essential column family. Based on the result from this > column family, extra column family can be scanned. > > Cheers > > On Thu, Feb 7, 2013 at 1:07 PM, Sergey Shelukhin > <ser...@hortonworks.com>wrote: > >> CFs are scanned in parallel in HBASE, and each row is built; scanning >> entire CF and then building rows by scanning entire different CF wouldn't >> scale very well. >> Do you filter data on ttl column family? >> >> On Thu, Feb 7, 2013 at 12:01 PM, yonghu <yongyong...@gmail.com> wrote: >> >> > Like a table can contain ttl data and static data without indicating >> > ttl. So, I want to first scan the columns which have ttl restrictions >> > and later the static columns. The goal that I want to achieve is to >> > reduce the data missing due to ttl expiration during the scan. >> > >> > regards! >> > >> > Yong >> > >> > On Thu, Feb 7, 2013 at 6:29 PM, Ted Yu <yuzhih...@gmail.com> wrote: >> > > Can you give us the use case where the scanning order is significant ? >> > > >> > > Thanks >> > > >> > > On Thu, Feb 7, 2013 at 9:23 AM, yonghu <yongyong...@gmail.com> wrote: >> > > >> > >> Dear all, >> > >> >> > >> I wonder if it is possible to indicate the column scan order when >> > >> scanning table. For example, if I have two column families cf1 and cf2 >> > >> and I create a scan object. Is the table scanning order of >> > >> scan.addFamily(cf1) and scan.addFamily(cf2) is as same as >> > >> scan.addFamily(cf2) and scan.addFamily(cf1)? If it's the same order, >> > >> is it possible to indicate the scanning order of table? >> > >> >> > >> regards! >> > >> >> > >> Yong >> > >> >> > >>
