Hi Yifeng
> Maybe I can translate the book to Chinese, too. > May I send you a greeting email from my personal address, and talk about your > plan via email at first? Sure, -- Tatsuya Kawano (Mr.) Tokyo, Japan On Jan 26, 2011, at 2:14 PM, Yifeng Jiang <[email protected]> wrote: > Hi Tatsuya, > > >This one is a commercial book from a Japanese publisher, so I'll do this by > >myself. > > I see. I'll be looking forward to reading your book. > > > > >I created a Jira entry to track this task: > >https://issues.apache.org/jira/browse/HBASE-3391 > > Good job. I'm glad to work with you on the translation. > Maybe I can translate the book to Chinese, too. > > > > Are you working at Rakuten in Tokyo? Maybe we can meet at next Hadoop > > Source Code Reading at Rakuten > Tower. Do you know this event? > > I'm working for Rakuten at the Osaka branch. > So I don't know if I can go to Tokyo to meet you at next Hadoop Source Code > Reading event. > > May I send you a greeting email from my personal address, and talk about your > plan via email at first? > > Thanks, > > On 01/26/2011 12:34 PM, Tatsuya Kawano wrote: >> Hi Yifeng, >>> #4. Writing Japanese books and documents >>> I am glad if I can work on this one with you. >> Thanks for your offer. Let me explain a bit more about them. >>>> -- Currently I'm authoring a book chapter about HBase for a Japanese NOSQL >>>> book >> This one is a commercial book from a Japanese publisher, so I'll do this by >> myself. >> >>>> -- I'll translate The Apache HBase Book to Japanese >> This one comes with HBase, and I'm looking for some people (like you) to >> work with. >> >> http://hbase.apache.org/book.html >> >> I created a Jira entry to track this task: >> https://issues.apache.org/jira/browse/HBASE-3391 >> >> >> Are you working at Rakuten in Tokyo? Maybe we can meet at next Hadoop Source >> Code Reading at Rakuten Tower. Do you know this event? >> >> Thanks, >> Tatsuya >> >> -- >> Tatsuya Kawano (Mr.) >> Tokyo, Japan >> >> >> On Jan 25, 2011, at 11:03 AM, Yifeng Jiang<[email protected]> >> wrote: >> >>> #4. Writing Japanese books and documents >>> I am glad if I can work on this one with you. >>> >>> >>> On 01/23/2011 10:18 AM, Tatsuya Kawano wrote: >>>> Hi, >>>> >>>> I wanted to let you know that I'm planning to contribute the following >>>> items to the HBase community. These are my spare time projects and I'll >>>> only be able to spend my time about 7 hours a week, so the progress will >>>> be very slow. I want some feedback from you guys to prioritize them. Also, >>>> if someone/team wants to work on them (with me or alone), I'll be happy to >>>> provide more details. >>>> >>>> >>>> 1. RADOS integration >>>> >>>> Run HBase not only on HDFS but also RADOS distributed object store (the >>>> lower layer of Ceph), so that the following options will become available >>>> to HBase users: >>>> >>>> -- No SPOF (RADOS doesn't have the name node(s), but only ZK-like monitors >>>> and data nodes) >>>> -- Instant backup of HBase tables (RADOS provides copy-on-write snapshot >>>> per object pool) >>>> -- Extra durability option on WAL (RADOS can do both synchronous and >>>> asynchronous disk flush. HDFS doesn't have the earlier option) >>>> >>>> Note: >>>> RADOS object = HFile, WAL >>>> object pool = group of HFiles or WAL >>>> >>>> Current status: Design phase >>>> >>>> >>>> 2. mapreduce.HFileInputFormat >>>> >>>> MR library to read data directly from HFiles. (Roughly 2.5 times faster >>>> than TableInputFormat in my tests) >>>> >>>> Current status: Completed a proof-of-concept prototype and measured >>>> performance. >>>> >>>> >>>> 3. Enhance Get/Scan performance of RS >>>> >>>> Add an hash code and a couple of flags to HFile at the flush time and >>>> change scanner implementation so that: >>>> >>>> -- Get/Scan operations will get faster. (less key comparisons for >>>> reconstructing a row: O(h * c) -> O(h). [h = number of HFiles for the >>>> row, c = number of columns in an HFile]) >>>> -- The size of HFiles will become a bit smaller. (The flags will eliminate >>>> duplicate bytes in keys (row, column family and qualifier) from HFiles.) >>>> >>>> Current status: Completed a proof-of-concept prototype and measured >>>> performance. >>>> >>>> Detals: >>>> https://github.com/tatsuya6502/hbase-mr-pof/ >>>> (I meant "poc" not "pof"...) >>>> >>>> >>>> 4. Writing Japanese books and documents >>>> >>>> -- Currently I'm authoring a book chapter about HBase for a Japanese NOSQL >>>> book >>>> -- I'll translate The Apache HBase Book to Japanese >>>> >>>> >>>> Thank you, >>>> >>>> >>>> -- >>>> Tatsuya Kawano (Mr.) >>>> Tokyo, Japan >>>> >>>> http://twitter.com/#!/tatsuya6502 >>>> >>>> >>>> >>> -- >>> Yifeng Jiang >>> > > > -- > Yifeng Jiang >
