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https://issues.apache.org/jira/browse/JCR-3730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13908042#comment-13908042
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Shashank Gupta commented on JCR-3730:
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>A hashed prefix of three or four characters should be sufficient.
hashed prefix guarantees to distribute load and hence implemented that way.
No sure if SHA1 hash can distribute the load.
> Use object keys to create partitions in S3 automatically
> --------------------------------------------------------
>
> Key: JCR-3730
> URL: https://issues.apache.org/jira/browse/JCR-3730
> Project: Jackrabbit Content Repository
> Issue Type: Sub-task
> Components: jackrabbit-core
> Affects Versions: 2.7.4
> Reporter: Shashank Gupta
> Fix For: 2.7.5
>
>
> To improve performance of S3, it is recommended to use object keys which
> enables to save data in multiple partitions. [1]
> The current key format dataStore_SHA1_HASH put all data in single partition.
> It is recommended to remove dataStore_ prefix and split SHA1_HASH to enable
> randomness in prefix.
> for e.g. if older key format is
> dataStore_004cb70c8f87d78f04da41e7547cb434094089ea. change this key format to
> 004c-b70c8f87d78f04da41e7547cb434094089ea
> *Also consider upgrade scenario to migrate older key format data
> http://docs.aws.amazon.com/AmazonS3/latest/dev/request-rate-perf-considerations.html
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