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https://issues.apache.org/jira/browse/HBASE-23264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17092963#comment-17092963
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Zheng Wang commented on HBASE-23264:
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Thanks very much.
> Resolve a TODO of BucketAllocator: "Why we add the extra 1024 bytes? Slop?"
> ---------------------------------------------------------------------------
>
> Key: HBASE-23264
> URL: https://issues.apache.org/jira/browse/HBASE-23264
> Project: HBase
> Issue Type: Improvement
> Components: BucketCache
> Reporter: Zheng Wang
> Assignee: Zheng Wang
> Priority: Minor
> Fix For: 3.0.0, 2.3.0, 1.7.0, 2.2.5
>
>
> {code:java}
> // TODO: Why we add the extra 1024 bytes? Slop?
> private static final int DEFAULT_BUCKET_SIZES[] = { 4 * 1024 + 1024, 8 * 1024
> + 1024,
> 16 * 1024 + 1024, 32 * 1024 + 1024, 40 * 1024 + 1024, 48 * 1024 + 1024,
> 56 * 1024 + 1024, 64 * 1024 + 1024, 96 * 1024 + 1024, 128 * 1024 + 1024,
> 192 * 1024 + 1024, 256 * 1024 + 1024, 384 * 1024 + 1024,
> 512 * 1024 + 1024 };{code}
> The real block size in hfile may a little larger than the size we configured
> ,so we need add extra 1024 bytes for fit.
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