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https://issues.apache.org/jira/browse/ZOOKEEPER-3179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16661432#comment-16661432
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Michael Han commented on ZOOKEEPER-3179:
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Good feature. 

We can also consider provide the option to offload compression / decompression 
to dedicated hardware - e.g. FPGA. 

> Add snapshot compression to reduce the disk IO
> ----------------------------------------------
>
>                 Key: ZOOKEEPER-3179
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3179
>             Project: ZooKeeper
>          Issue Type: Improvement
>            Reporter: Fangmin Lv
>            Priority: Major
>             Fix For: 3.6.0
>
>
> When the snapshot becomes larger, the periodically snapshot after certain 
> number of txns will be more expensive. Which will in turn affect the maximum 
> throughput we can support within SLA, because of the disk contention between 
> snapshot and txn when they're on the same drive.
>  
> With compression like zstd/snappy/gzip, the actual snapshot size could be 
> much smaller, the compress ratio depends on the actual data. It might make 
> the recovery time (loading from disk) faster in some cases, but will take 
> longer sometimes because of the extra time used to compress/decompress.
>  
> Based on the production traffic, the performance various with different 
> compress method as well, that's why we provided different implementations, we 
> can select different compress method for different use cases.
>  



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