Re: HBase Shell available through Apache Zeppelin

2016-05-16 Thread Stack
On Tue, Feb 2, 2016 at 8:42 PM, Rajat Venkatesh wrote: > I have contributed a feature to access HBase Shell to Apache Zeppelin. The > main advantages are: > - Admins have quick access to HBase shell through the browser. > - Sessions are saved. So you can log in and the current state of > triage/

Re: hbase get and mvcc

2016-05-16 Thread Stack
On Mon, May 16, 2016 at 5:19 PM, Shushant Arora wrote: > thanks! > > Does puts which fall inside readpoint of ongoing scan/get are preserved in > HFile also or only in memstore and it blocks memstore flush until all > ongoing scans are completed. > > > Yes. If a flush happens while an outstandin

Re: Hbase v0.98 - does disabling autoflush affect Deletes or just Puts?

2016-05-16 Thread Stack
On Mon, May 16, 2016 at 5:20 PM, Natasha d'silva wrote: > Thanks for the quick response. What about check and put? The check is > atomic but is the put buffered? > No. checkAnd* are operations unto themselves that are sent to the server to run; only it has the means of achieving a checkAnd* that

Re: Hbase v0.98 - does disabling autoflush affect Deletes or just Puts?

2016-05-16 Thread Natasha d'silva
Thanks for the quick response. What about check and put? The check is atomic but is the put buffered? On May 16, 2016 6:30 PM, "Stack" wrote: > In 0.98, only Puts are buffered. > > I did a search of the above text but didn't find it in 0.98... I'm > searching wrong? Mind fling an issue so we fix

Re: hbase get and mvcc

2016-05-16 Thread Shushant Arora
thanks! Does puts which fall inside readpoint of ongoing scan/get are preserved in HFile also or only in memstore and it blocks memstore flush until all ongoing scans are completed. On Tue, May 17, 2016 at 5:31 AM, Stack wrote: > On Mon, May 16, 2016 at 4:55 PM, Shushant Arora > > wrote: > >

Re: hbase get and mvcc

2016-05-16 Thread Stack
On Mon, May 16, 2016 at 4:55 PM, Shushant Arora wrote: > Hi > > Hbase uses MVCC for achieving consistent result for Get operations . > To achieve MVCC it has to maintain multiple versions of same row/cells . > How many max version of a row/cell does Hbase keeps at any time to support > MVCC. > >

hbase get and mvcc

2016-05-16 Thread Shushant Arora
Hi Hbase uses MVCC for achieving consistent result for Get operations . To achieve MVCC it has to maintain multiple versions of same row/cells . How many max version of a row/cell does Hbase keeps at any time to support MVCC. Since say multiple gets started one after the other and has not complet

Big Data Developer for Arrow Electronics (Englewood,Colorado)

2016-05-16 Thread Bin Wang
Hi HBase mailling list, This is a non-technical question but please let me know if I should post it somewhere else. I really don't think any place other than the HBase mailling list will be a better place to post this type of question. The Arrow Big Data team desperately is seeking for a talented

Re: Hbase v0.98 - does disabling autoflush affect Deletes or just Puts?

2016-05-16 Thread Stack
In 0.98, only Puts are buffered. I did a search of the above text but didn't find it in 0.98... I'm searching wrong? Mind fling an issue so we fix the above misdocumentation? Thank you, S On Mon, May 16, 2016 at 10:30 AM, Natasha d'silva wrote: > Hi, I would like some clarification on whethe

Hbase v0.98 - does disabling autoflush affect Deletes or just Puts?

2016-05-16 Thread Natasha d'silva
Hi, I would like some clarification on whether or not disabling autoflush affects Put and Delete operations or just Puts. The setAutoFlush doc states that it only affects Puts, but elsewhere in the documentation for HTable, Puts and Writes are mentioned together: "In case of writes (Put, Delete), t

Re: hbase rowkey design

2016-05-16 Thread Heng Chen
In my company, we calculate UV/PV offline in batch, and update every day. If do it online, url + timestamp could be the rowkey. 2016-05-16 18:13 GMT+08:00 齐忠 : > Yes, like google analytics. > > 2016-05-16 17:48 GMT+08:00 Heng Chen : > > You want to calculate UV/PV online? > > > > 2016-05-16 16

Re: hbase rowkey design

2016-05-16 Thread 齐忠
Yes, like google analytics. 2016-05-16 17:48 GMT+08:00 Heng Chen : > You want to calculate UV/PV online? > > 2016-05-16 16:46 GMT+08:00 齐忠 : > >> I have very large log(50T per day), >> >> My log event as follows >> >> url,visitid,requesttime >> >> http://www.aaa.com?a=b&c=d&e=f, 1, 1463387380 >> h

Re: hbase rowkey design

2016-05-16 Thread Heng Chen
You want to calculate UV/PV online? 2016-05-16 16:46 GMT+08:00 齐忠 : > I have very large log(50T per day), > > My log event as follows > > url,visitid,requesttime > > http://www.aaa.com?a=b&c=d&e=f, 1, 1463387380 > http://www.aaa.com?a=b&c=d&e=fa, 1, 1463387280 > http://www.aaa.com?a=b&c=d&e=fa, 2

hbase rowkey design

2016-05-16 Thread 齐忠
I have very large log(50T per day), My log event as follows url,visitid,requesttime http://www.aaa.com?a=b&c=d&e=f, 1, 1463387380 http://www.aaa.com?a=b&c=d&e=fa, 1, 1463387280 http://www.aaa.com?a=b&c=d&e=fa, 2, 1463387280 http://www.aaa.com?a=b&c=d&e=fab, 2, 1463387280 http://www.aaa.com?a=b&c