Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
HBase >> mail # user >> AsyncHBase 1.5.0 has been released


Copy link to this message
-
Re: AsyncHBase 1.5.0 has been released
Are you looking to trigger endpoint coprocessors ?

-Viral
On Wed, Jan 29, 2014 at 2:33 AM, ripsacCTO <[EMAIL PROTECTED]> wrote:

> Hi Tsuna,
>
> Is there any support for coprocessors ?
>
>
> On Saturday, January 25, 2014 3:58:16 AM UTC+5:30, tsuna wrote:
>>
>> Hi all,
>> after 3 months in RC2 and 2 more months past that, I'm happy to
>> announce that AsyncHBase 1.5.0 is now officially out. AsyncHBase
>> remains true to its initial promise: the API is still backward
>> compatible, but under the hood it continues to work with all
>> production releases of HBase of the past few years.
>>
>> This release was tested against HBase 0.89, 0.90, 0.92, 0.94, and
>> 0.96.  On HBase 0.96, the performance is looking great, with
>> AsyncHBase still outperforming HTable by about 2x.
>>
>>
>> Tag: https://github.com/OpenTSDB/asynchbase/tree/v1.5.0
>> Pre-built <https://github.com/OpenTSDB/asynchbase/tree/v1.5.0Pre-built>jar:
>> http://code.google.com/p/opentsdb/downloads/detail?
>> name=asynchbase-1.5.0.jar
>> The release is also available in Maven central.
>>
>>
>> * Version 1.5.0 (2013-12-13) [67fc3b7]
>>
>> This release introduces compatibility with HBase 0.96 and up, and adds
>> a dependency on Google's protobuf-java library.  Note that HBase 0.95.x,
>> which was a "developer preview" release train, is NOT supported.
>>
>> Please note that support for explicit row locks has been removed from
>> HBase 0.95 and up.  While the classes and functionality remain usable
>> when using earlier versions of HBase, an `UnsupportedOperationException'
>> will be raised if one attempt to send a `RowLockRequest' to a newer
>> version of HBase.
>>
>> Please note that while AsyncHBase never made any guarantees about
>> the exact order in which multiple edits are applied within a batch,
>> the order is now different when talking to HBase 0.96 and up.
>>
>> New public APIs:
>>   - Scanners can now use a variety of different filters via the new
>>     `ScanFilter' interfaces and its various implementations.
>>   - It's possible to specify specific families to scan via `setFamilies'.
>>   - Scanners can put an upper bound on the amount of data fetched by RPC
>>     via the new `setMaxNumKeyValues' (works with HBase 0.96 and up only).
>>   - HBaseRpc now has a `failfast()' and a `setFailfast(boolean)' pair
>>     of methods to allow RPCs to fail as soon as their encounter an
>>     issue out of the ordinary (e.g. not just a `NotSuchRegionException').
>>   - `GetRequest' has additional constructor overloads that make its API
>>     more uniform with that of other RPCs.
>>   - HBaseClient has new `prefetchMeta' methods to prefetch metadata about
>>     the regions of a table (for the entire table or a given key range).
>>
>> Noteworthy bug fixes:
>>   - DeleteRequest wasn't honoring its timestamp if one was given (#58).
>>   - When a connection attempt fails, buffered RPCs weren't cleaned up
>>     or retried properly.
>>   - When one RPC fails because of another one (e.g. we fail to send an
>>     RPC because a META lookup failed), the asynchronous exception that
>>     is given to the callback now properly carries the original RPC that
>>     failed.
>>   - There was an unlikely race condition that could cause an NPE while
>>     trying to retrieve the ROOT region from ZooKeeper.
>>   - There was an unlikely race if the client got disconnected right
>>     after successfully establishing a connection to a RegionServer, while
>>     it was flushing RPC buffered while waiting to be connected.  Also
>>     when those RPCs were flushed, the batchable RPCs weren't given a
>>     chance to get batched.
>>   - It was not possible to scan the ROOT region (or the hbase:meta region
>>     when using HBase 0.96+).
>>
>> $ git diff --stat v1.4.1..v1.5.0 | tail -n 1
>>  72 files changed, 5213 insertions(+), 540 deletions(-)
>>
>> (a fair amount of the new lines comes from all the .proto files
>> imported from HBase's source tree)
>>
>> $ git shortlog v1.4.1..v1.5.0
>> Andrey Stepachev (1):