[jira] [Commented] (BOOKKEEPER-120) Review BookKeeper client documentation

["Sijie Guo (Commented) (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BOOKKEEPER-120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13158457#comment-13158457 ] 

Sijie Guo commented on BOOKKEEPER-120:
--------------------------------------

Why there is two 'ledger_dirs' settings in 'Bookie configuraiton' section? Is it duplicated? 
{code}
+p. Directory Bookkeeper outputs its write ahead log, ideally in a dedicated device. The default value is "/tmp/bk-txn".
+
+* ledger_dirs
+
+p. Directory Bookkeeper outputs ledger snapshots could define multiple directories to store snapshots, comma separated. For example: /tmp/bk1-data,/tmp/bk2-data
+
+* ledger_dirs
+
+p. Ideally ledger dirs and journal dir are each in a differet device, which reduce the contention between random i/o and sequential write. It is possible to run with a single disk, but performance will be significantly lower.
+
{code}

BTW, BOOKKEEPER-119 is trying to standardize configuration keys in bookkeeper.
                
> Review BookKeeper client documentation
> --------------------------------------
>
>                 Key: BOOKKEEPER-120
>                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-120
>             Project: Bookkeeper
>          Issue Type: Sub-task
>            Reporter: Flavio Junqueira
>            Assignee: Flavio Junqueira
>             Fix For: 4.0.0
>
>         Attachments: BOOKKEEPER-120.patch
>
>


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