wu-sheng commented on a change in pull request #10:
URL:
https://github.com/apache/skywalking-satellite/pull/10#discussion_r546254109
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File path: docs/plugins/queue/mmap/README.md
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+# Design
+The mmap-queue is a big, fast and persistent queue based on the memory mapped
files. One mmap-queue has a directory to store the whole data. The Queue
directory is made up with many segments and 1 meta file.
+
+- Segment: Segment is the real data store center, that provides large-space
storage and does not reduce read and write performance as much as possible by
using mmap. And we will avoid deleting files by reusing them.
+- Meta: The purpose of meta is to find the data that the consumer needs.
+
+## Meta
+Metadata only needs 80B to store the Metadata for the pipe. But for memory
alignment, it takes at least one memory page size, which is generally 4K.
Review comment:
Please highlight, this is not our design, declare the original place
very clearly.
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