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From Andrew Purtell <apurt...@apache.org>
Subject Re: modular build and pluggable rpc
Date Fri, 27 May 2011 20:00:49 GMT
Also needing, perhaps later, consideration:

- HDFS-347 or not

  - Lucene embedding for hbase-search, though as a coprocessor this is already pretty much
handled if we have platform support (therefore a platform module) for a HDFS that can do local
read shortcutting and block placement requests

- HFile v1 versus v2

Making decoupled development at several downstream sites manageable, with a home upstream
for all the work, while simultaneously providing clean migration paths for users, basically.

--- On Fri, 5/27/11, Andrew Purtell <apurtell@apache.org> wrote:

> From: Andrew Purtell <apurtell@apache.org>
> Subject: modular build and pluggable rpc
> To: dev@hbase.apache.org
> Date: Friday, May 27, 2011, 12:49 PM
> From IRC:
> apurtell    i propose we take the build modular as early as possible to deal with
multiple platform targets
> apurtell    secure vs nonsecure
> apurtell    0.20 vs 0.22 vs trunk
> apurtell    i understand the maintenence issues with multiple rpc engines, for example,
but a lot of reflection twistiness is going to be worse
> apurtell    i propose we take up esammer on his offer
> apurtell    so branch 0.92 asap, get trunk modular and working against multiple platform
> apurtell    especially if we're going to see rpc changes coming from downstream projects...
> apurtell    also what about supporting secure and nonsecure clients with the same
> apurtell    zookeeper does this
> apurtell    so that is selectable rpc engine per connection, with a negotiation
> apurtell    we don't have or want to be crazy about it but a rolling upgrade should
be possible if for example we are taking in a new rpc from fb (?) or cloudera (avro based?)
> apurtell    also looks like hlog modules for 0.20 vs 0.22 and successors
> apurtell    i think over time we can roadmap the rpc engines, if we have multiple,
by deprecation
> apurtell    now that we're on the edge of supporting both 0.20 and 0.22, and secure
vs nonsecure, let's get it as manageable as possible right away
> St^Ack_        apurtell: +1
> apurtell    also i think there is some interest in async rpc engine
> St^Ack_        we should stick this up on dev i'd say
> Best regards,
>     - Andy
> Problems worthy of attack prove their worth by hitting
> back. - Piet Hein (via Tom White)

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