Lars Hofhansl commented on HBASE-5782:

@Stack: I ran it too. It works fine. The "interesting" thing I find that it is 
faster *with* the patch! And that scares me.
I ran with 100 threads, 10000 iterations. With the patch it took 29s, without 
it took 43s. This is on a 6 core machine with hyper threading.

Now, the HLogPerformanceEvaluation does not work with -nosync and -verify, 
right? (presumably because no final sync is issued).

Wouldn't mind to get some other numbers from you as well if you had some time.
> Edits can be appended out of seqid order since HBASE-4487
> ---------------------------------------------------------
>                 Key: HBASE-5782
>                 URL: https://issues.apache.org/jira/browse/HBASE-5782
>             Project: HBase
>          Issue Type: Bug
>          Components: wal
>    Affects Versions: 0.94.0
>            Reporter: Gopinathan A
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Blocker
>             Fix For: 0.94.0
>         Attachments: 5782-lars-v2.txt, 5782-sketch.txt, 5782.txt, 
> 5782.unfinished-stack.txt, HBASE-5782.patch, hbase-5782.txt
> Create a table with 1000 splits, after the region assignemnt, kill the 
> regionserver wich contains META table.
> Here few regions are missing after the log splitting and region assigment. 
> HBCK report shows multiple region holes are got created.
> Same scenario was verified mulitple times in 0.92.1, no issues.

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