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Author SHA1 Message Date
Tom DNetto ec4f849079 tka: implement filesystem-based tailchonk implementation 
FS implements Chonk, and given the expected load characteristics (frequent use
of AUM() + ChildAUMs(), and infrequent use of Heads() + CommitVerifiedAUMs()), the
implementation avoids scanning the filesystem to service AUM() and ChildAUMs().

Signed-off-by: Tom DNetto <tom@tailscale.com>
 2022-07-13 10:07:17 -07:00
Tom DNetto cca25f6107 tka: implement Chonk type & an in-memory implementation 
Chonks are responsible for efficient storage of AUMs and other TKA state.

For testing/prototyping I've implemented an in-memory version, but once we
start to use this from tailscaled we'll need a file-based version.

Signed-off-by: Tom DNetto <tom@tailscale.com>
 2022-07-11 10:38:29 -07:00