From d3a7348a3b04de0f3ded584672d1dfb5f4d29e5a Mon Sep 17 00:00:00 2001
From: Andrew Kryczka <andrewkr@fb.com>
Date: Mon, 12 Jun 2017 12:27:54 -0700
Subject: [PATCH] update history for 5.6

Summary:
- mention range deletion + file ingestion
- move post-5.6 stuff into new section
Closes https://github.com/facebook/rocksdb/pull/2440

Differential Revision: D5229910

Pulled By: ajkr

fbshipit-source-id: 1facfe41993fa1f3b1f6fa7dc77d2b11aa2b317a
---
 HISTORY.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/HISTORY.md b/HISTORY.md
index bbf5bb5a1..c541fad7d 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,6 +1,13 @@
 # Rocksdb Change Log
 ## Unreleased
 ### Public API Change
+* DB property "rocksdb.sstables" now prints keys in hex form.
+
+### New Features
+* Measure estimated number of reads per file. The information can be accessed through DB::GetColumnFamilyMetaData or "rocksdb.sstables" DB property.
+
+## 5.6.0 (06/06/2017)
+### Public API Change
 * Scheduling flushes and compactions in the same thread pool is no longer supported by setting `max_background_flushes=0`. Instead, users can achieve this by configuring their high-pri thread pool to have zero threads.
 * Replace `Options::max_background_flushes`, `Options::max_background_compactions`, and `Options::base_background_compactions` all with `Options::max_background_jobs`, which automatically decides how many threads to allocate towards flush/compaction.
 * options.delayed_write_rate by default take the value of options.rate_limiter rate.
@@ -11,6 +18,7 @@
 * Users can pass a cache object to write buffer manager, so that they can cap memory usage for memtable and block cache using one single limit.
 * Flush will be triggered when 7/8 of the limit introduced by write_buffer_manager or db_write_buffer_size is triggered, so that the hard threshold is hard to hit.
 * Introduce WriteOptions.low_pri. If it is true, low priority writes will be throttled if the compaction is behind.
+* `DB::IngestExternalFile()` now supports ingesting files into a database containing range deletions.
 
 ## 5.5.0 (05/17/2017)
 ### New Features