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From Ryan Rawson <ryano...@gmail.com>
Subject Re: HRegionInfo.createRegionName()
Date Tue, 16 Nov 2010 00:48:48 GMT
Why are you calling this method?

Despite it being 'public', users are not expected to talk to the
filesystem directly. Your Warranty would be void if you did so :-)

-ryan


On Mon, Nov 15, 2010 at 4:44 PM, Ted Yu <yuzhihong@gmail.com> wrote:
> Can someone tell me when false should be specified for newFormat ?
>
> Thanks
>
> On Mon, Nov 15, 2010 at 2:15 PM, Stack <stack@duboce.net> wrote:
>
>> I made an issue to cover J-D's suggestion, HBASE-3236, that lists what
>> Ted is looking for.  Its pegged against 0.90.1 but if a new RC, we can
>> include it then.
>>
>> St.Ack
>>
>>
>>
>> On Mon, Nov 15, 2010 at 9:23 PM, Jean-Daniel Cryans <jdcryans@apache.org>
>> wrote:
>> > I think it's worth going at greater lengths to document that kind of
>> > "breakage", maybe a page in the book? Stuff like "What's new" and
>> > "Incompatibilities" that we can easily link to.
>> >
>> > J-D
>> >
>> > On Mon, Nov 15, 2010 at 12:38 PM, Ryan Rawson <ryanobjc@gmail.com>
>> wrote:
>> >> That is correct, those classes were deprecated in 0.20, and now gone in
>> 0.90.
>> >>
>> >> Now you will want to use HTable and Result.
>> >>
>> >> Also Filter.getNextKeyHint() is an implementation detail, have a look
>> >> at the other filters to get a sense of what it does.
>> >>
>> >> On Mon, Nov 15, 2010 at 12:33 PM, Ted Yu <yuzhihong@gmail.com> wrote:
>> >>> Just a few findings when I tried to compile our 0.20.6 based code with
>> this
>> >>> new release:
>> >>>
>> >>> HConstants is final class now instead of interface
>> >>> RowFilterInterface is gone
>> >>> org.apache.hadoop.hbase.io.Cell is gone
>> >>> org.apache.hadoop.hbase.io.RowResult is gone
>> >>> constructor
>> >>>
>> HColumnDescriptor(byte[],int,java.lang.String,boolean,boolean,int,boolean)
>> >>> is gone
>> >>> Put.setTimeStamp() is gone
>> >>> org.apache.hadoop.hbase.filter.Filter has added
>> >>> getNextKeyHint(org.apache.hadoop.hbase.KeyValue)
>> >>>
>> >>> If you know the alternative to some of the old classes, please share.
>> >>>
>> >>> On Mon, Nov 15, 2010 at 2:51 AM, Stack <stack@duboce.net> wrote:
>> >>>
>> >>>> The first hbase 0.90.0 release candidate is available for download:
>> >>>>
>> >>>>  http://people.apache.org/~stack/hbase-0.90.0-candidate-0/<http://people.apache.org/%7Estack/hbase-0.90.0-candidate-0/>
>> <http://people.apache.org/%7Estack/hbase-0.90.0-candidate-0/>
>> >>>>
>> >>>> HBase 0.90.0 is the major HBase release that follows 0.20.0 and
the
>> >>>> fruit of the 0.89.x development release series we've been running
of
>> >>>> late.
>> >>>>
>> >>>> More than 920 issues have been closed since 0.20.0.  Release notes
are
>> >>>> available here: http://su.pr/8LbgvK.
>> >>>>
>> >>>> HBase 0.90.0 runs on Hadoop 0.20.x.  It does not currently run
on
>> >>>> Hadoop 0.21.0.   HBase will lose data unless it is running on an
>> >>>> Hadoop HDFS 0.20.x that has a durable sync. Currently only the
>> >>>> branch-0.20-append branch [1] has this attribute. No official releases
>> >>>> have been made from this branch as yet so you will have to build
your
>> >>>> own Hadoop from the tip of this branch or install Cloudera's CDH3
[2]
>> >>>> (Its currently in beta).  CDH3b2 or CDHb3 have the 0.20-append
patches
>> >>>> needed to add a durable sync. See CHANGES.txt [3] in
>> >>>> branch-0.20-append to see list of patches involved.
>> >>>>
>> >>>> There is no migration necessary.  Your data written with HBase
0.20.x
>> >>>> (or with HBase 0.89.x) is readable by HBase 0.90.0.  A shutdown
and
>> >>>> restart after putting in place the new HBase should be all thats
>> >>>> involved.  That said, once done, there is no going back to 0.20.x
once
>> >>>> the transition has been made.   HBase 0.90.0 and HBase 0.89.x write
>> >>>> region names differently in the filesystem.  Rolling restart from
>> >>>> 0.20.x or 0.89.x to 0.90.0RC0 will not work.
>> >>>>
>> >>>> Should we release this candidate as hbase 0.90.0?  Take it for
a spin.
>> >>>>  Check out the doc.  Vote +1/-1 by November 22nd.
>> >>>>
>> >>>> Yours,
>> >>>> The HBasistas
>> >>>> P.S. For why the version 0.90 and whats new in HBase 0.90, see slides
>> >>>> 4-10 in this deck [4]
>> >>>>
>> >>>> 1.
>> http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.20-append
>> >>>> 2. http://archive.cloudera.com/docs/
>> >>>> 3.
>> >>>>
>> http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.20-append/CHANGES.txt
>> >>>> 4. http://hbaseblog.com/2010/07/04/hug11-hbase-0-90-preview-wrap-up/
>> >>>>
>> >>>
>> >>
>> >
>>
>

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