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[HBASE-9213] create a unified shim for hadoop 1 and 2 so that there's one build of HBase - HBase - [issue]
...This is a brainstorming JIRA. Working with HBase dependency at this point seems to be rather painful from what I hear from other folks. We could do the hive model with unified shim, built in...
http://issues.apache.org/jira/browse/HBASE-9213    Author: Sergey Shelukhin, 2014-01-14, 18:54
Re: 1.0 and cleaning up the APIs - HBase - [mail # dev]
...... Do you mean after 1.0? That's what I read from the previous comment. Presumably, changing client APIs will break compat.  As for deprecations, if more radical approach is taken, w.r...
   Author: Sergey Shelukhin, 2014-01-13, 17:59
[HBASE-10288] make mvcc an (optional) part of KV serialization - HBase - [issue]
...This has been suggested in HBASE-10241. Mvcc can currently be serialized in HFile, but the mechanism is... magical. We might want to make it a part of proper serialization of the KV. It can ...
http://issues.apache.org/jira/browse/HBASE-10288    Author: Sergey Shelukhin, 2014-01-10, 18:33
Re: about study hbase source - HBase - [mail # user]
...You can pick a random JIRA, starting with the ones that seem easy (esp. noob label, but people may not set it on all easy jiras), and submit a patch. The best way to learn the codebase is to...
   Author: Sergey Shelukhin, 2014-01-10, 17:27
[HBASE-10242] client-side mvcc tracking in scanners - HBase - [issue]
...Scanners should be able to track mvcc read point and send it to server. This is a subtask, so server can use this mvcc as best it can, but doesn't actually have to guarantee it within the sc...
http://issues.apache.org/jira/browse/HBASE-10242    Author: Sergey Shelukhin, 2014-01-10, 04:42
[HBASE-10210] during master startup, RS can be you-are-dead-ed by master in error - HBase - [issue]
...Not sure of the root cause yet, I am at "how did this ever work" stage.We see this problem in 0.96.1, but didn't in 0.96.0 + some patches.It looks like RS information arriving from 2 sources...
http://issues.apache.org/jira/browse/HBASE-10210    Author: Sergey Shelukhin, 2014-01-07, 22:16
[HBASE-10241] implement mvcc-consistent scanners (across recovery) - HBase - [issue]
...Scanners currently use mvcc for consistency. However, mvcc is lost on server restart, or even a region move. This JIRA is to enable the scanners to transfer mvcc (or seqId, or some other num...
http://issues.apache.org/jira/browse/HBASE-10241    Author: Sergey Shelukhin, 2014-01-07, 02:23
Re: multi() contract or lack thereof - HBase - [mail # dev]
...The index is always with respect to the original list on client; server just sends it back. Actually, nevermind, I noticed for each action what I said is not true. Non-atomic ops can reorder...
   Author: Sergey Shelukhin, 2014-01-06, 23:55
[HBASE-10244] store mvcc in store files per KV for longer time, discard during compactions based on scanner timeout - HBase - [issue]
...Initially, we can store via KV tag. For perf reasons, it might make sense to make it a first-class member of KV, but that would require HFileV4...
http://issues.apache.org/jira/browse/HBASE-10244    Author: Sergey Shelukhin, 2014-01-06, 22:37
Re: Committing bug and test fixes to branches - HBase - [mail # dev]
...I think there can be problems with features like mvcc-seqId combo being in a branch, because they may touch lots of places in the core that might change frequently and cause lots of merging/...
   Author: Sergey Shelukhin, 2014-01-06, 17:04
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