Beta 13

[Bugfix] Fixing esx scroll query functionality

Minor bugfix to more reliably specify a bounding query for the scroll
command

Beta 12

Adds support for partial-upsert index semantics

Prior to this commit, esx only supported full document upsert by
document ID or new document creation. This had a couple of implications:

1. Create-only operations would never benefit from the improved
   performance of not having to first check for document existence. This
   also required documents to have `_id` set, instead of using
   Elasticsearch's auto-generated IDs.
2. Partial document upserts were impossible previously, which may have
   caused issues when expecting only a partial update, and instead
   replacing the entire document

Beta 11

v0.1.0-beta.11

[Bugfix] Set GOMAXPROCS to `numWorkers`

Beta 9

[Bugfix] Make sure to throttle between retries

This fixes an issue whereby an index batch would be retried without
calling the throttle in between.

Beta 8

[Perf] Adding CLI flags for more throttle controls

This change adds two new flags:

* `--throttle-window-size` controls the number of runtime samples to use
  when estimating the expected duration that the next index operation
  will take
* `--throttle-high-water-mark` controls the percentage of the absolute
  maximum index duration (the ES timeout) that will be considered
  internally by the throttle so as to more proactively curb latency
  spikes

Beta 10

[Bugfix] Record timing for requests in error

This fixes a bug where an error (including a timeout!) would return 0
for the request duration.

Beta 7

[Bugfix] Don't mutate input batches

Because batches can optionally be retried, we need to ensure that
they're contents cannot be mutated, so as to prevent spooky side-effects
at a distance.

Beta 6

v0.1.0-beta.6

[Bugfix] Fixing possible NP

Beta 5

[Perf] Adds a sample-based throttler for indexing

This change introduces a dynamic throttling system that samples bulk
indexing performance timings in order to intelligently throttle the net
ingest speed, thus ensuring a more stable indexer and ES cluster health.

For additional control, and optional `--num-retries` option is also
exposed to automatically retry batches that fail for any reason,
including timeouts.

Beta 4

v0.1.0-beta.4

Adding batch-level indexer logging