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https://issues.apache.org/jira/browse/BOOKKEEPER-950?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15554009#comment-15554009
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Rithin Shetty commented on BOOKKEEPER-950:
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No, this is different from BOOKKEEPER-916. BOOKKEEPER-916 deals with tiering
between different classes of storage like SSD and HDD for maximum utilization
while also guaranteeing low latency. This Jira is about making sure that the
consumption of disk space is proportional to the amount of free space available
in a bookie. Bookies that have higher free disk space get written to more
often than the ones that have lower disk space.
> Ledger placement policy to accomodate different storage capacity of bookies
> ---------------------------------------------------------------------------
>
> Key: BOOKKEEPER-950
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-950
> Project: Bookkeeper
> Issue Type: New Feature
> Reporter: Rithin Shetty
> Assignee: Rithin Shetty
> Fix For: 4.5.0
>
> Original Estimate: 672h
> Remaining Estimate: 672h
>
> In our environment, in Salesforce, we are likely to have bookie nodes with
> different storage capacity: some will have 1TB others might have 3TB. Also,
> our ledgers are likely going to be long lived. The current ledger placement
> policy selects the bookies randomly leading to uniform distribution. This
> would cause some of bookies to reach high utilization while the rest would be
> underutilized. We need a new ledger placement policy that has higher
> probability of selecting bookies with higher free disk space than the ones
> with lower disk free space.
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