yes what Ted mentioned, u can try out.. -Anoop-
On Fri, Feb 22, 2013 at 7:46 PM, Ted <[email protected]> wrote: > Hbase-5416 should help your use case. > Cf2 would be the essential column family. > > This feature is available in 0.94.5 > > Cheers > > On Feb 22, 2013, at 5:55 AM, Farrokh Shahriari < > [email protected]> wrote: > > > @Anoop : Here is my situation: I have 2 columnFamilies(cf1,cf2),5-50 > > qualifiers(they are variable),first I should check the value of > qualifiers > > in cf2,then if they equal to some values I'm going to get the values of > cf1 > > by that rowkey. > > > > @Amita: thank you.I will check that too. > > > > Farrokh > > On Thu, Feb 21, 2013 at 8:58 PM, Amit Sela <[email protected]> wrote: > > > >> I think that if your intention is to do some kind of scan filtering on > the > >> server side then maybe an EndPoint coprocessor would be more fitting. > >> You can iterate over the InternalScanner and return a Map<> with your > >> filtered values. > >> > >> You can also check this link: > >> > http://hbase-coprocessor-experiments.blogspot.co.il/2011/05/extending.html > >> > >> Good Luck! > >> > >> On Thu, Feb 21, 2013 at 5:52 PM, Anoop John <[email protected]> > wrote: > >> > >>> What is this filtering at client side doing exactly? > >>> postScannerClose() wont deal with any scanned data. This hook will be > >>> called later.. You should be using hooks with scanner's next calls. > >> Mind > >>> telling the exact thing you are doing now at client side. Then we might > >> be > >>> able to suggest some thing. > >>> > >>> -Anoop- > >>> > >>> On Thu, Feb 21, 2013 at 7:14 PM, Farrokh Shahriari < > >>> [email protected]> wrote: > >>> > >>>> Hello again, > >>>> I've used PostScannerClose Regionobserver as the hbase book > (Definitive > >>>> Guide) says,but it doesn't seem worked.And I noticed that the > >>>> PostScannerClose doesn't return any value like result. > >>>> In fact,I just wanna doing a simple job as described below: > >>>> Up to now,I've used a scanner to filter the columnFamily,then on the > >>> client > >>>> side ( means at the result loop), filtered some other things,now I > want > >>> to > >>>> do that after scanning each region to reduce the amount of return > >> results > >>>> to client. > >>>> > >>>> Please help me,I need it asap. > >>>> > >>>> Farrokh > >>>> > >>>> On Tue, Feb 19, 2013 at 9:03 PM, Farrokh Shahriari < > >>>> [email protected]> wrote: > >>>> > >>>>> Thanks you guys > >>>>> > >>>>> > >>>>> On Mon, Feb 18, 2013 at 12:00 PM, Amit Sela <[email protected]> > >>> wrote: > >>>>> > >>>>>> Yes... that was emailing half asleep... :) > >>>>>> > >>>>>> On Mon, Feb 18, 2013 at 7:23 AM, Anoop Sam John <[email protected] > >>> > >>>>>> wrote: > >>>>>> > >>>>>>> We dont have any hook like postScan().. In ur case you can try > >> with > >>>>>>> postScannerClose().. This will be called once per region. When > >> the > >>>>>> scan on > >>>>>>> that region is over the scanner opened on that region will get > >>> closed > >>>>>> and > >>>>>>> at that time this hook will get executed. > >>>>>>> > >>>>>>> -Anoop- > >>>>>>> ________________________________________ > >>>>>>> From: Farrokh Shahriari [[email protected]] > >>>>>>> Sent: Monday, February 18, 2013 10:27 AM > >>>>>>> To: [email protected] > >>>>>>> Cc: [email protected] > >>>>>>> Subject: Re: Co-Processor in scanning the HBase's Table > >>>>>>> > >>>>>>> Thanks you Amit,I will check that. > >>>>>>> @Anoop: I wanna run that just after scanning a region or after > >>>> scanning > >>>>>> the > >>>>>>> regions that to belong to one regionserver. > >>>>>>> > >>>>>>> On Mon, Feb 18, 2013 at 7:45 AM, Anoop Sam John < > >> [email protected] > >>>> > >>>>>>> wrote: > >>>>>>> > >>>>>>>>> I wanna use a custom code after scanning a large table and > >> prefer > >>>> to > >>>>>> run > >>>>>>>> the code after scanning each region > >>>>>>>> > >>>>>>>> Exactly at what point you want to run your custom code? We have > >>>>>> hooks at > >>>>>>>> points like opening a scanner at a region, closing scanner at a > >>>>>> region, > >>>>>>>> calling next (pre/post) etc > >>>>>>>> > >>>>>>>> -Anoop- > >>>>>>>> ________________________________________ > >>>>>>>> From: Farrokh Shahriari [[email protected]] > >>>>>>>> Sent: Monday, February 18, 2013 12:21 AM > >>>>>>>> To: [email protected]; [email protected] > >>>>>>>> Subject: Co-Processor in scanning the HBase's Table > >>>>>>>> > >>>>>>>> Hi there > >>>>>>>> I wanna use a custom code after scanning a large table and > >> prefer > >>> to > >>>>>> run > >>>>>>>> the code after scanning each region.I know that I should use > >>>>>>>> co-processor,but don't know which of Observer,Endpoint or both > >> of > >>>>>> them I > >>>>>>>> should use ? Is there any simple example of them ? > >>>>>>>> > >>>>>>>> Tnx > >> >
