You are right.
The software should not get a free pass only because the hardware might lose
data, though. :)
From: Otis Gospodnetic
To: user@hbase.apache.org; lars hofhansl
Sent: Monday, January 14, 2013 7:19 PM
Subject: Re: persistence in Hbase
Hi,
Just
lose data.
> >
> >
> > -- Lars
> >
> >
> >
> > - Original Message -----
> > From: anil gupta
> > To: user@hbase.apache.org
> > Cc:
> > Sent: Thursday, January 10, 2013 2:38 PM
> > Subject: Re: persistence in Hbase
> >
Lars
>
>
>
> - Original Message -
> From: anil gupta
> To: user@hbase.apache.org
> Cc:
> Sent: Thursday, January 10, 2013 2:38 PM
> Subject: Re: persistence in Hbase
>
> Hi Mohammad,
>
> If the Write Ahead Log(WAL) is "turned on" then in **NO** case
t; Data is not sync'ed to disk, but only distributed to all HDFS replicas.
> >> During a power outage event across all HDFS failure zones (such as a
> data
> >> center) you can lose data.
> >>
> >>
> >> -- Lars
> >>
> >>
> >>
Lars
>>
>>
>>
>> - Original Message -
>> From: anil gupta
>> To: user@hbase.apache.org
>> Cc:
>> Sent: Thursday, January 10, 2013 2:38 PM
>> Subject: Re: persistence in Hbase
>>
>> Hi Mohammad,
>>
>> If the Write
> center) you can lose data.
>
>
> -- Lars
>
>
>
> - Original Message -
> From: anil gupta
> To: user@hbase.apache.org
> Cc:
> Sent: Thursday, January 10, 2013 2:38 PM
> Subject: Re: persistence in Hbase
>
> Hi Mohammad,
>
> If the Write A
Sent: Thursday, January 10, 2013 2:38 PM
Subject: Re: persistence in Hbase
Hi Mohammad,
If the Write Ahead Log(WAL) is "turned on" then in **NO** case data should
be lost. HBase is strongly-consistent. If you know of any case when WAL is
turned on and data is lost then IMO that's a C
Lars
From: Panshul Gupta
To: user@hbase.apache.org
Sent: Thursday, January 10, 2013 7:18 AM
Subject: persistence in Hbase
Hello,
I was wondering if it is possible that I have data stored in Hbase tables
on my 10 node cluster. I switch off (power down) my cluster. W
Hello Anil,
You are absolutely correct and I haven't faced any
such situation till date. I think I have made a controversial
statement via my reply :) Apologies for the mess.
Thank you
Warm Regards,
Tariq
https://mtariq.jux.com/
On Fri, Jan 11, 2013 at 4:08 AM, anil gupta wrote:
> Hi M
Hi Mohammad,
If the Write Ahead Log(WAL) is "turned on" then in **NO** case data should
be lost. HBase is strongly-consistent. If you know of any case when WAL is
turned on and data is lost then IMO that's a Critical bug in HBase.
Thanks,
Anil Gupta
On Thu, Jan 10, 2013 at 7:37 AM, Mohit Anchlia
Data also gets written in WAL. See:
http://hbase.apache.org/book/perf.writing.html
On Thu, Jan 10, 2013 at 7:36 AM, ramkrishna vasudevan <
ramkrishna.s.vasude...@gmail.com> wrote:
> Yes definitely you will get back the data.
>
> Please read the HBase Book that explains things in detail.
> http:/
Yes definitely you will get back the data.
Please read the HBase Book that explains things in detail.
http://hbase.apache.org/book.html.
Regards
Ram
On Thu, Jan 10, 2013 at 8:48 PM, Panshul Gupta wrote:
> Hello,
>
> I was wondering if it is possible that I have data stored in Hbase tables
> o
Panshul,
Of course you will have all your data in place.
It stored in HDFS and remains in there after restarting.
Thank you!
Sincerely,
Leonid Fedotov
On Jan 10, 2013, at 7:18 AM, Panshul Gupta wrote:
> Hello,
>
> I was wondering if it is possible that I have data stored in Hbase tables
> on
Hello Pranshul,
The data which you are pushing to the HBase doesn't go its final
destination directly. When you start pushing the data, it first goes to an
in-memory log file. Once the log files are considerably big, they are
merged together and put in an in-memory store called as memstore.
14 matches
Mail list logo
