Meta-cache: optimize GetMulti call #10676
Merged
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Batch Get call into one
create a reader() that takes in a metadata, so I can fetch all metadata first
then call this reader() to read.
create a key struct to use in GetMulti to map the metadata. I thought about
using PebbleKey, but I think it's a bit too complicated to use in this case.
https://github.com/buildbuddy-io/buildbuddy-internal/issues/6005