cockroachdb / cockroachdb/pebble
investigate use of SSD local cache
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A-storage
C-enhancement
T-storage
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Description
This issue tracks investigating use of a local SSD as a "level 2" block cache. This could be beneficial in cloud deployments, when the persistent storage is bandwidth limited.
For example, with AWS a `gp3` volume has only 125MB/s free bandwidth. Some instances come with an NVME local SSD which will likely support on the order of GB/s bandwidth. A large block-cache on this SSD could reduce the reads that go to EBS (which would leave more bandwidth available for writes).
Jira issue: PEBBLE-151
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