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https://issues.apache.org/jira/browse/HBASE-2?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12566777#action_12566777
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Jim Kellerman commented on HBASE-2:
-----------------------------------

Thinking about this some more, using a long is overkill, and to truly maintain 
sort order, would need to be zero filled from the left.

A simple integer counter will suffice (although it too needs to be zero filled 
from the left to preserve sort order). e.g.:

The following do not sort properly:

1
2
10

whereas the following do:

01
02
10


> hlog numbers should wrap around when they reach 999
> ---------------------------------------------------
>
>                 Key: HBASE-2
>                 URL: https://issues.apache.org/jira/browse/HBASE-2
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: regionserver
>            Reporter: Billy Pearson
>            Assignee: Bryan Duxbury
>            Priority: Minor
>             Fix For: 0.2.0
>
>         Attachments: 2-v2.patch, 2.patch
>
>
> Question about log numbers -> Closing current log writer 
> hdfs://10.0.0.1:9000/gfs_storage/hadoop-root/hbase/log_10.0.0.3_1201900440436_60020/hlog.dat.024
> What happens when the log get to hlog.dat.999

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