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https://issues.apache.org/jira/browse/CASSANDRA-13326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15925688#comment-15925688
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yuqi commented on CASSANDRA-13326:
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We are trying to run Cassandra on AArch64 and found that:
1.Cassandra uses JNA 4.0.0 which doesn't come with native AArch64 support.
2.Cassandra uses Snappy Compress Library version 1.1.1.7 which was released in
2014 and has no aarch64 support.
So ' snappy-java-1.1.1.7.jar' and 'jna-4.0.0.jar' are built on AArch64 host and
replaced on path '$CASSANDRA_SRC/lib'. It makes cassadra work on AArch64.
But this patch just enable aarch64 unaligned memory access. It doesn't affect
the execution of cassandra.
We will take more tests on AArch64 for cassandra in the future. It's a nice
beginning of cassandra enablement on AArch64, which is our focus on.
> Support unaligned memory access for AArch64
> ---------------------------------------------
>
> Key: CASSANDRA-13326
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13326
> Project: Cassandra
> Issue Type: Improvement
> Components: Observability, Testing
> Environment: ARM Cortex-A57@2.1GHz (Hisilicon Taishan/ Cavium
> ThunderX)
> Ubuntu 16.04.1 LTS
> Reporter: yuqi
> Priority: Minor
> Fix For: 3.10
>
>
> ARMv8 (AArch64) supports unaligned memory access. The patch will enable it
> and will improve performance on AArch64
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