cmasone-attic d809bb2a09 Increase Chunk locality when writing Values through ValueStore (#3064) ...

Readahead + NBS benefit greatly when "related" Chunks are close to
each other. The current code did a good job of writing siblings in the
Chunk graph next to each other, but "cousins" (that is, children whose
parents are siblings) might wind up spread quite far apart.  This
patch makes WriteValue hold onto novel Chunks until it sees a
_grandparent_ come through the pipeline. All of that Chunk's queued
grandchildren will be Put at that time.

Additionally, ValueStore.Flush() now takes a Hash and flushes all
Chunks that are reachable from the Chunk with that Hash, as opposed
to simply flushing all Chunks to the BatchStore. This means that
there's now no supported way to write orphaned Chunks/Values to a
Database.

Fixes #3051


* More logging for TestStreamingMap2

2017-01-23 12:16:55 -08:00

..

noms

Increase Chunk locality when writing Values through ValueStore (#3064)

2017-01-23 12:16:55 -08:00

util

Revert "Introduce noms version 8. Use it to guard type simplification." (#3043)

2017-01-09 16:30:25 -08:00